MXPA98006033A - Double seal connection to make possible a fast measurement of fr cylinder pressure - Google Patents

Abstract

The present invention relates to a double seal coupling connection to enable rapid measurement of the brake cylinder prison through the housing of a load sensing valve, this housing defining a chamber in communication with a brake cylinder of the brake cylinder. a rail car, and a threaded hole in communication with this chamber, this double seal coupling connection comprising: (a) a valve body having a protruding end configured as a male portion of a quick connect coupling, and one end threaded to screw into that threaded hole, the valve body defining a passage therethrough, a first cylindrical section of this passage communicating with a second cylindrical section of said passage; (b) a valve stem having, at one end head of the same, a valve of vertical movement that can be moved inside the first cylindrical section, pair to seat against an outer valve seat formed on the projecting end; (c) a spring stop approximately secured between the first and second cylindrical sections; (d) a first spring concentrically disposed about the valve stem between the stop the spring end of the valve stem, in such a way that the vertical movement valve is compressed against the external valve seat, to provide a primary seal that prevents the leakage of this pressure, (e) a cylindrical seat in one end, formed as an internal valve seat, and at an opposite end, located adjacent to the spring stop, said seat part (i) defining an internal hole therethrough, to receive a terminal end of the stem valve, and (ii) an annular groove circumferentially around the seat part, to move to retain an o-ring to seal the cylindrical seat part within the sec- a cylindrical section adjacent to the spring stop, (f) a one-way valve holder, having one end thereof, a stem post inside the inner bore approximate to the terminal end of the valve stem, and defining an annular recess around a stem post base for retaining a one-way valve, and (g) a second spring having one end secured to an opposite end of the one-way valve holder, such that, when screwed At the threaded end of the connection in the threaded hole of the housing the second spring compresses the valve of an annular path against the internal valve seat, to provide a secondary seal that also prevents the leakage of this pressure, so that the coupling of a female portion of a quick connection that engages the male portion causes the vertical movement valve to move away from the outer valve seat, and the valve one way moves away from the internal valve seat, thus allowing flow through the passage, and making possible a rapid measurement of the pressure inside the housing, by means of a pressure measuring device attached to an opposite end of the hemb portion

Description

CONNECTION OF DOUBLE SEAL TO MAKE POSSIBLE A QUICK MEASUREMENT OF THE BRAKE CYLINDER PRESSURE REFERENCE WITH RELATED APPLICATIONS This application is related to the United States of America Patent Application entitled Dual Seal Coupling Apparatus for Enabling Quick Measurement of Brake Cylinder Pressure, Serial Number 08 / 901,606, filed concurrently with this on July 28. of 1997. The pending application is assigned to the assignee of this invention, and its teachings are incorporated herein by reference.

FIELD OF THE INVENTION The present invention relates in general to a mechanism through which there is access to a pressure to be measured. More particularly, the invention relates to a double seal connection which allows the pressure of the brake cylinder to be rapidly measured through a load sensor of the empty freight brake equipment and loaded with a rail car.

BACKGROUND OF THE INVENTION A typical freight train includes one or more locomotives, a plurality of wagons, and a pneumatic train line referred to as a brake tube. The brake pipe consists of a series of individual pipe sections interconnected with each other. A section of pipe secured to the bottom side of each car is interconnected with another section of pipe by means of a flexible coupler located between each car. The brake hose supplies the pressurized air that is required by the brake control system to charge the different tanks and operate the air brake equipment in each wagon of the freight train. A train operator located in the guide locomotive can manipulate a brake handle to apply and release the brakes on the wagons, as desired. The brake handle can be moved to and from a released position at one end where the brake pipe pressure is at its maximum and the brakes are fully released to an emergency position at the other end where the brake pipe pressure is the minimum and the brakes are fully applied. The brake handle positions in this manner include brake release, minimum service brake application, full service brake application, and emergency brake application. When the brakes are released, the tanks and the brake tube are usually loaded at the same pressure: typically 6.3 kg / cm2 in a freight train, and 7.7 kg / cm2 in a passenger train. When the brakes are applied, the pressure in the brake tube is reduced by means of a valve located in the guide locomotive. The exact amount by which the pressure is reduced depends on which of the application positions the brake handle is placed. It is this pressure reduction that signals the brake control valve of each car to supply pressurized air from the appropriate tanks to the brake cylinders. The brake cylinders convert this pressure to the mechanical force applied by the brake shoes to slow down or stop the rotation of the wheels of the car. Assuming that the brake signal is successfully communicated through the entire train, the brakes of all the wagons of the train respond in general in the same way. Figure 1 illustrates a schematic diagram of the air brake equipment of a typical freight car equipped with idle and load brake equipment. The air brake equipment typically includes one or more brake cylinders, an emergency air reservoir, an auxiliary air reservoir, and an "ABD" or similar type pneumatic brake control valve. The operation of the pneumatic control valve, as well as a description of its components, are provided in the aforementioned pending application. Each freight wagon may include vacuum and load brake equipment, such as a proportional load valve P-1, and a load sensing valve type S-1 or ELX type, all of which are made by the Westinghouse Air Brake Company (WABCO), and are well known in the brake control art. The objective of the brake equipment in vacuum and load is to reduce the braking of the car if it is empty, and allow a heavier braking of the car if it is loaded. In a freight train with wagons equipped with vacuum and load brake equipment, the braking is applied more evenly throughout the train according to the load carried by the wagons. This tends to reduce loosening between adjacent wagons, and improves the overall handling of the freight train. With respect to the operation of a load sensing valve, the load sensing valve Sl, for example, automatically detects whether the car is loaded or empty, generally measuring the ratio between the car body and the upper part of the side frame of the van. . Each car typically has two vans, one at each end. Each van includes the wheels and axles and other parts that together form the structure that supports the body of the car. Suspension springs are used to dampen vibrations that would otherwise be transmitted from the wheels to the body of the car, and which may otherwise damage the load being transported. These suspension springs are deflected or compressed to a degree proportional to the weight of the load carried by the wagon.

Typically mounted on the underside of the body of the car, the load sensor valve S-l uses its sensor arm to measure the distance between the body of the car and the upper part of the side frame of the boxcar. When loaded, the wagon body also compresses the springs, thus reducing the distance between the car body and the side frame of the van. This limits the distance that the sensor arm can travel. Conversely, when the car is empty, the springs compress less, thus maximizing the distance between the car body and the side frame of the van. Then the distance that the sensor arm can travel is at maximum. When the load sensor S-l detects that the car is empty, its internal mechanism serves to regulate the air flow to the load valve P-1. When the car is empty, the proportional load valve Pl controls the air flow to the brake cylinder, so that the brake cylinder pressure is about 60 percent of what it would be if the car were loaded, without Import how much pressure is reduced in the brake hose. During brake applications, the equalizing volume is used to maintain a satisfactory relationship between the pressure in the brake and idle equipment, and that in the control valve and its tanks when the car is empty. Brake and idle brake equipment, such as the type alluded to in this document, is described in U.S. Patent Nos. 5,005,915 and 5,100,207. These patents are assigned to the assignee of the present invention, and their teachings are incorporated herein by reference. Either type S-l or type ELX, the load sensing valve provides one or more internal chambers or passages. An interconnecting tube connects at least one of these chambers or passages to the brake cylinder, as shown, for example, in the scheme of Figure 1. A load sensing valve Sl of the type shown schematically in Figure 1, is shown in FIG. illustrated in Figure 2. The left side of the housing of the load sensing valve provides a generally cylindrical portion flanked by two screws. Between these screws and screwed into a threaded hole in the cylindrical portion, there is a pipe plug. The removal of the plug from the tube provides direct access to the chamber, which communicates with the brake cylinder by means of the interconnected tube shown in Figure 1. The threaded hole of the housing in this way can be used as an access gate to through which there is access to the pressure in the brake cylinder from the load sensing valve. The American Association of Railroads (A.A.R.) has proposed that each wagon of a freight train be provided with a mechanism that allows the pressure inside the brake cylinder to be read quickly. In the present, A.A.R. is considering issuing a specification that requires that a commercially available quick connect type connection be used to access the pressure inside the brake cylinder. However, the drawback of this connection is that it provides only a seal with which to contain the pressure to be measured. That is, although this connection is not being used to access the pressure, it offers only a seal to prevent leakage of the pressure it is supposed to contain. Unless the connection is routinely covered to protect the seal when the connection is not being used to gain access to the brake cylinder pressure. The seal is exposed to dust, dirt, and / or other potential contaminants. Of course, it is important that this connection prevents pressure leaks from the brake cylinder, or otherwise the operation of the brakes can be adversely affected. It should be noted that the above background information is provided to assist the reader in the understanding of the present invention. In accordance with the foregoing, any terms used herein are not intended to be limited to any particular narrow interpretation, unless specifically stated otherwise in this document.

OBJECTIVES OF THE INVENTION Accordingly, it is a primary objective of the invention to provide a highly reliable connection that allows rapid measurement of the pressure inside a brake cylinder of a car. Another goal is to make the pressure inside the brake cylinder quickly measurable with a connection that provides two seals, so that if one seal leaks, the other seal prevents the leakage of air that the connection is supposed to contain. Still another objective is to provide this connection with a male portion of a commercially available quick connection, such that the pressure inside the brake cylinder can be rapidly measured by coupling the male portion with a corresponding female portion that is attached at its other end, a pressure measuring device. Still another object of the invention is to provide the double seal coupling connection, to enable rapid measurement of the pressure inside any other type of pipe or container capable of containing air or other suitable fluid under pressure.

In addition to the objects and advantages mentioned above, other different objects and advantages of the invention will become more apparent to those skilled in the pertinent art, from a reading of the detailed description section of this document. The other objects and advantages will become particularly clear when the detailed description is considered together with the accompanying drawings and the appended claims.

SUMMARY OF THE INVENTION In a currently preferred embodiment, the invention provides a double seal coupling connection to enable a rapid measurement of brake cylinder pressure through a housing of a load sensing valve. The housing defines a chamber in communication with a brake cylinder of a car, and a threaded hole in communication with the camera. The double seal coupling connection includes a valve body, a primary valve, and a secondary valve. The valve body has a protruding end which is configured as a male portion of a quick-connect coupling, and a threaded end that can be screwed into the threaded hole of the housing. The body of the valve defines a passage having a first cylindrical section thereof communicating with a second cylindrical section thereof. The primary valve is located in the first cylindrical section, and the secondary valve in the second cylindrical section. The primary valve includes a valve stem with a valve-like head of vertical movement against the outer seat of the valve, such that the primary valve is normally closed to prevent leakage of pressure from the housing. The secondary valve provides a cylindrical seat part and a fastener. The cylindrical seat part is sealably secured inside the second cylindrical section, and defines through it an internal hole. The cylindrical seat part at one end forms an internal seat of the valve, and at an opposite end is located adjacent to the first element. The fastener has at one end a rod post which makes contact with a terminal end of the valve stem inside the internal bore of the seat part. The fastener also has a one-way type valve retained within an annular recess defined in the fastener around a stem post base. A second element compresses the valve of one-way type against the internal seat of the valve, such that the secondary valve is normally closed to prevent leakage of pressure from the housing. When a female portion of a quick-connect coupling is coupled to the male portion of the connection, the primary and secondary valves both open, since the portion of the female connection causes the first and second elements to be further compressed. This allows air to flow through the passage, and enables a rapid measurement of the pressure inside the housing by means of a pressure measuring device attached to an opposite end of the female portion.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic diagram of an air brake equipment for a typical freight wagon that includes a load sensing valve S-1. Figure 2 is a side view of the load sensing valve S-l shown schematically in Figure la. Figure 3 is a cross-sectional view of a double seal coupling connection in accordance with the present invention. Figure 3a is a cross-sectional view of the double seal coupling connection shown in Figure 3, without its internal components. Figure 3b is a perspective view of the double seal coupling connection illustrated in Figure 3, with the protective cap attached. Figure 3c is a perspective view of a valve stem for the double seal coupling connection shown in Figure 3. Figure 3d is a side view of a one-way valve seat for the double seal coupling connection shown in Figure 3. Figure 3e is a perspective view of a one-way valve fastener for the double seal coupling connection shown in Figure 3. Figure 3f is a perspective view of a spring fastener for the double seal coupling connection shown in Figure 3. Figure 3g is a perspective view of a one-way valve spring for the double seal coupling connection shown in Figure 3. Figure 4 is a view in cross section of the double seal coupling connection connected to a load sensing valve Sl.

DETAILED DESCRIPTION OF THE INVENTION Before describing the invention in detail, the reader is advised that, for clarity and understanding, where possible, identical components having identical functions have been marked in each of the accompanying drawings, with the same reference numerals in each of the Figures provided in this document. Figures 1 and 2 each illustrate a housing 701 of a load sensing valve S-l 700. The housing 701 defines a chamber or internal passage 702 communicating with a brake cylinder 800 of a rail car. Typically, an interconnecting tube 801 connects the chamber 702 to the brake cylinder 800. The housing 701 also defines a threaded hole 703 that communicates with the chamber 702, as best shown in Figure 2. Removing a tube plug 704 of the threaded hole 703, provides a direct access to the chamber 702. The threaded hole 703 can thus be used as an access gate through which the pressure in the brake cylinder is accessed, starting from the load sensing valve Sl. Figures 3a-g and 4 illustrate the essential details of a presently preferred embodiment of the present invention 100. The double seal coupling connection of this invention enables a rapid measurement of brake cylinder pressure inside the housing of a sensing valve. of load of type Sl or of type ELX, or load sensing valves made by other different manufacturers of equipment for railroads. It should be noted, from reading this document, however, that the double seal coupling connection 100 described and claimed herein, of course, can be applied to any other type of housing, pipe, or container that can contain air or other suitable fluid under pressure.

The double seal coupling connection 100 basically includes a valve body 101, a valve stem 110, a spring or stop fastener 120, a first spring 130, a cylindrical seat part 140, a one way valve holder 150 , and a second spring 160. The valve body 101 has a protruding end 102 that is configured as a male portion of a quick-connect coupling, and a threaded end 103 that can be screwed into the threaded hole 703 of any suitable housing, such as that of the load sensing valve S-l 700. The valve body 101 defines a passage having a first cylindrical section 105 thereof communicating with a second cylindrical section 106 thereof. An external valve seat 112 is formed within the passage, at or near the opening of the projecting end. The valve stem 110 is located primarily inside the first cylindrical section 105 of the connection 100, as shown in Figure 2. The valve stem 110 has, at its head end 111, a vertical movement valve 115. The valve Vertical movement 115 can be composed of rubber or any other suitable sealing material. The vertical movement valve 115 can be moved into the first cylindrical section 105, and can be sealed against the external valve seat 112. The valve stem 110 also has a terminal end 113.

The spring stop 120 is secured to the cylindrical wall of the passage, approximately between the first and second cylindrical sections 105 and 106. Also between the first and second cylindrical sections 105 and 106, the cylindrical wall of the passage may define an annular groove 104. The spring stop 120 has three petals 121, each of which has a projecting lip 122. Collectively, the projecting lips 122 act as a flange or projection shoulder which can secure the spring stop 120 inside of the annular groove 104. The first spring 130 is arranged concentrically about the valve stem 110, between the spring stop 120 and the bottom side of the head end 111 of the valve stem 110. When sealed against the external valve seat 112, the vertical movement valve 115 serves as a primary seal that prevents leakage of air pressure from the housing. The cylindrical seat part 140 provides an annular groove 141 around its circumference, where it retains an O-ring 142. It is with this O-ring 142 that the cylindrical seat part 140 is sealingly secured within the second cylindrical section 106. One end 145 of the seat part 140 is configured as an internal valve seat, and its opposite end 146 is positioned adjacent to the spring stop 120. Along its longitudinal axis, the seat part 140 also defines, through of itself, an internal hole 148. This internal hole 148 receives the terminal end 113 of the valve stem 110, as shown in Figure 3. The one-way valve holder 150 is also located in the second cylindrical section 106 of the valve body 101. Generally of a cylindrical shape, the fastener 150 has, protruding from one end, a rod post 151. The rod post 151 is approximated to the terminal end 113 of the rod. valve 110 inside the inner hole 148 of the cylindrical seat part 140. At the base of the pole post 151, the one-way valve holder 150 defines an annular recess 152 where it retains a one-way valve 153. The One way valve 153 can be made of rubber or any other suitable sealing material. Preferably, there is a tolerance of approximately 0.5334 millimeters between the stud post 151 and the end end 113, to reduce the possibility of it turning inward against the valve of an annular track 153. When it sits against the inner seat of the valve 145, the one-way valve 153 serves as a secondary seal that further prevents leakage of air from the bearing housing. The second spring 160 is secured at one end with an opposite end 154 of the one-way valve holder 150. Preferably, the opposite end 154 of the holder 150 takes the form of a cylindrical arrow to which the second spring 160 is concentrically secured. The valve body 101 includes a hexagonal portion 108 between the protruding and threaded ends 102 and 103, to accommodate a key with which the connection 100 is screwed securely into the threaded hole 703. When the threaded end 103 is screwed into a housing In this case, the second spring 160 compresses the valve of an annular path 153 against the internal valve seat 145 of the cylindrical seat part 140. The double seal coupling connection 100 thus provides both a primary valve and a secondary valve for prevent brake cylinder pressure leakage when the male portion 102 of the quick connect coupling seats without engaging . Normally compressed against the inner valve seat 112, the vertical movement valve 115 serves as the primary valve, as it lies farther from the housing. In a similar manner, the one-way valve 153 is normally compressed against its internal valve seat 145 of the cylindrical seat part 140. The one-way valve 153 thus serves as the secondary valve., as it is closer to the accommodation. The coupling of a female portion of a quick-connect coupling with the male portion 102 of the invention 100 causes the vertical movement valve 115 to move simultaneously away from the outer valve seat 112, and the one-way valve 153 to move. moving away from the inner valve seat 145. In a specific manner, when coupled with the male portion 102, the female portion (not shown) pushes the vertical movement valve 115 away from the outer valve seat 112, thereby compressing the first spring 130 between the spring stop 120 and the lower side that is being passed through the head end 111 of the valve stem 110. This forces the terminal end 113 of the valve stem 110 against the stem post 151 of the valve holder of a via 150, thereby pushing the one-way valve 153 away from the internal valve seat 145, and compressing the second spring 160 between the opposite end 154 of the fastener 150 and the base of the threaded hole 703 of the housing. With both primary and secondary valves open, air is allowed to flow from the housing through the passage to the female portion of the quick connect coupling. In general, the main section 155 of the one-way valve holder 150 has a smaller diameter than that of the second cylindrical section 106 where it is housed. The rod post 150 of the fastener 150, and the terminal end 113 of the valve rod 110, in the same manner, have smaller diameters than the internal hole 148 of the seat part 140 where they can reciprocate. The petals 121 of the spring stop 120 are separated, as shown in Figure 3f. When the female portion is coupled to the male portion 102 of the invention 100, air from the housing flows around the holder 150 through the secondary valve. The air continues to flow through the conical space between the cylindrical wall of the internal hole 148 and the rod post 151 and the terminal end 113 of the valve stem 110 containing the internal hole 148. Finally, the air stream passes through the the first cylindrical section 105, and emerges from the primary valve inside the female portion of the quick connect coupling. By using a pressure measuring device connected to the opposite end of the female portion of the quick-connect coupling, the pressure of the air contained within the housing can be read quickly in this manner. The valve body 101, at its protruding end 102, is configured to assume the shape of a male portion of a quick connect coupling. Of course, there are a variety of quick connect couplings commercially available in the market. The male portion of a conventional commercially available quick connect coupling, however, would have to be extensively modified to make the double seal coupling connection 100 of the present invention. For example, the male portion of a conventional coupling would have to be modified to accommodate the secondary valve and its related components, such as the spring stop 120 and the annular groove 104. This also includes using the cylindrical seat 140, with its seat inner valve 145 at its inner end, and second spring 160. The one-way valve holder 150, including its rod post 151, the annular recess 152, the one-way annular valve 153, and the arrow to which the second spring 160 is concentrically joined, they would also have to be accommodated by a conventional male portion. Moreover, to accommodate the cylindrical seat part 140 of a large diameter, the second cylindrical section 106 would have to be further pierced, in order to form a shoulder 107 in the valve body 101 between the first and second cylindrical sections 105 and 106. Accordingly, not only would the cylindrical seat part 140 be sealed tightly within the second cylindrical section 106 by its ring-0 142, but would also be secured at its opposite end against the shoulder 107 adjacent the spring stop 120. The shoulder 107 and the annular groove 104 is best shown in Figure 3a. The position of the primary valve makes it more exposed to dust, dirt, and / or other potential contaminants. Accordingly, the secondary valve serves as a backup for the primary valve, if the vertical movement valve 105 succumbs to those contaminants or otherwise degrades. Conversely, if the one-way valve 157 is degraded, the primary valve acts as the backup seal to prevent pressure leakage from the housing, when the male portion 102 remains uncoupled. A protective cap 170 may also be used to cover the male portion 102 of the connection 100, in order to protect it from such contaminants when it is not being used. As best shown in Figures 3 and 3b, a sheave 171 may be placed around the threaded end 103 of the housing. When the threaded end 103 is screwed into the threaded bore of the housing, the pulley 171 is secured between an accommodation base of the hexagonal portion 108 and the housing. A strap 172 can be used to connect the pulley 171 to the protective cap 170, as shown in Figure 3b, in order to reduce the possibility of losing or misplacing the cap 170. It should be noted that the male and female portions of the quick connect coupling can be changed. Specifically, the female portion, instead of the male portion of the coupling, can be designed to be screwed into the threaded bore of the housing. It is more important that the female portion would have to be modified in the aforementioned manner to accommodate all of the aforementioned components, such as the spring stop 120, the cylindrical seat 140, the one way valve holder 150, and the second spring 160. The male portion, instead of the female portion, of the quick-connect coupling, would then be attached at its opposite end to the pressure measuring device, to measure the pressure inside the housing, when the male and female portions are engaged. female quick connect coupling. The double seal coupling connection 100 allows the pressure inside the brake cylinder to be rapidly measured according to the specification imposed by the AAR, although the specification requires that the brake cylinder pressure be made susceptible to rapid measurement, the invention maintains the overall integrity of the air brake equipment on the wagon by the primary and secondary valves preventing leakage of air from the load sensing valve Sl 700. The double seal coupling connection 100 written and claimed in this document , of course, can be applied to any other type of housing, pipe, or container capable of containing air or other suitable fluid under pressure. The currently preferred embodiment for carrying out the invention has been described in detail in accordance with the Patent Law. Persons of ordinary experience in the field to which this invention pertains, however, may recognize different alternative ways to practice the invention without departing from the spirit and scope of the appended claims. The experts will also recognize that the foregoing description is merely illustrative, and is not intended to limit any of the following claims to any particular narrow interpretation. In accordance with the foregoing, in order to promote the progress of science and useful techniques, we ensure, through exclusive privilege rights to the entire subject matter covered by the following claims, during the time prescribed by the Patent Law.

Claims (21)

NOVELTY OF THE INVENTION Having described the foregoing invention, it is considered that as a novelty, and therefore, property is claimed as contained in the following: CLAIMS

1. A double seal coupling connection to enable rapid measurement of the brake cylinder prison through the housing of a load sensing valve, this distance defining a chamber in communication with a brake cylinder of a rail car, and a threaded hole in communication with this chamber, this double seal coupling connection comprising: (a) a valve body having a protruding end configured as a male portion of a quick-connect coupling, and a threaded end to be screwed into that threaded hole, the valve body defining a passage therethrough, a first cylindrical section of this passage communicating with a second cylindrical section of said passage; (b) a valve stem having, at one end thereof, a vertical movement valve that can move inside the first cylindrical section, to seat against an external valve seat formed at the projecting end; (c) a spring stop approximately secured between the first and second cylindrical sections; (d) a first spring arranged concentrically around the valve stem, between the spring stop and the head end of the valve stem, such that the vertical movement valve is compressed against the external valve seat, to provide a seal primary that prevents the leakage of this pressure; (e) a cylindrical seat part at one end, formed as an internal valve seat, and at an opposite end, located adjacent the spring stop, said seat part (i) defining an internal hole therethrough, to receive a terminal end of the valve stem, and (ii) an annular groove cyclunferentially around the seat part, to retain an O-ring, to seal the cylindrical seat part within the second cylindrical section adjacent to the top of the cylinder. spring; (f) a one-way valve holder, having at one end thereof, a rod post inside the inner bore approximate to the terminal end of the valve stem, and defining an annular recess around a stem post base to retain a one-way valve; and (g) a second spring having an end secured to an opposite end of the one-way valve holder, such that, when screwed to the threaded end of the connection in the threaded hole of the housing, the second spring compresses the one-way valve against the internal valve seat, to provide a secondary seal that also prevents leakage of this pressure; such that the coupling of a female portion of a quick connection that engages the male portion causes the vertical movement valve to move away from the outer valve seat, and the one-way valve to move away from the valve. internal valve seat, thereby allowing flow through the passage, and making possible a rapid measurement of the pressure inside the housing, by means of a pressure measuring device attached to an opposite end of the female portion.

The double seal coupling connection according to claim 1, characterized in that the second spring is concentrically secured to an arrow formed as part of the opposite end of the one-way valve holder.

3. The double seal coupling connection according to claim 1, characterized in that the opposite end of the cylindrical seat piece abuts against a shoulder formed in the valve body inside the passage, because the first Cylindrical section is of a diameter smaller than the second cylindrical section.

4. The double seal coupling connection in accordance with the claim in claim 1, characterized in that a flange of the spring stop ensures the spring stop against an annular groove formed in the valve body within the passage, between the first and second cylindrical sections.

5. A double seal coupling connection to enable rapid measurement of the prison contained within a housing, this connection comprising: (a) a valve body having a protruding end configured as a male portion of a connecting coupling fast, and a threaded end to be screwed into a threaded hole in the housing, the valve body defining a passage therethrough, a first cylindrical section of this passage communicating with a second cylindrical section of said passage; (b) a valve stem having, at one end thereof, a vertical movement valve that can move inside the first cylindrical section, to seat against an external valve seat formed at the projecting end; (c) a spring stop approximately secured between the first and second cylindrical sections; (d) a first spring arranged concentrically around the valve stem, between the spring stop and the head end of the valve stem, such that the vertical movement valve is compressed against the external valve seat, to provide a seal primary that prevents the leakage of this pressure; (e) a cylindrical seat part at one end, formed as an internal valve seat, and at an opposite end, located adjacent the spring stop, and defining an internal hole therethrough, for receiving an end terminal of the valve stem, the cylindrical seat part being sealed inside the second adjacent cylindrical section in the spring stop; (f) a one-way valve holder, having at one end thereof, a rod post inside the inner bore approximate to the terminal end of the valve stem, and defining an annular recess around a stem post base to retain a one-way valve; and (g) a second spring having an end secured to an opposite end of the one-way valve holder, such that, when screwed to the threaded end of the connection in the threaded hole of the housing, the second spring compresses the one-way valve against the internal valve seat, to provide a secondary seal that prevents leakage of this pressure; such that the coupling of a female portion of a quick connection that engages the male portion of this connection causes the vertical movement valve to move away from the outer valve seat, and the one-way valve to move moving away from the inner valve seat, thereby allowing flow through the passage, and making possible a rapid measurement of the pressure contained within the housing, by means of a pressure measuring device attached to an opposite end of the female portion .

6. The double seal coupling connection according to claim 5, characterized in that a flange of the spring stop ensures the spring stop against an annular groove formed in the valve body within the passage, between the first and second cylindrical sections.

The double seal coupling connection according to claim 5, characterized in that the second spring is concentrically secured to an arrow formed as part of the opposite end of the one-way valve holder.

The double seal coupling connection according to claim 5, characterized in that the cylindrical seat part is sealed inside the second cylindrical section by a ring-0 retained within an annular groove defined circumferentially in the part. of cylindrical seat.

9. The double seal coupling connection according to claim 5, characterized in that the opposite end of the cylindrical seat piece abuts against a shoulder formed in the valve body within the passage, because the first Cylindrical section is of a diameter smaller than the second cylindrical section.

10. The double seal coupling connection according to claim 9, characterized in that a flange of the spring stop ensures the spring stop against an annular groove formed in the body of the valve inside the passage, between the shoulder and the first cylindrical section.

11. The double seal coupling connection according to claim 5, characterized in that the valve body provides a hexagonal portion between the protruding and threaded ends.

12. The double seal coupling connection according to claim 5, characterized in that it also includes a protective cap to cover the male portion of the quick connect coupling.

The double seal coupling connection according to claim 11, characterized in that it further includes: (a) a sheave to be placed around the threaded end of the connection, and that can be secured between the hexagonal portion and the housing, when the threaded end of the connection is screwed into the threaded hole of the housing; and (b) a protective cap, connected by means of a belt with the sheave, to cover the male portion of the quick connect coupling.

14. A double seal coupling connection for enabling rapid measurement of the prison contained within a housing, this connection comprising: (a) a valve body having a protruding end configured as a male portion of a connecting coupling fast, and a threaded end for screwing into a threaded hole in the housing, the valve body defining a passage therethrough, a first cylindrical section of this passage communicating with a second cylindrical section of said passage; (b) a primary valve located in the first cylindrical section, including this primary valve, a valve stem with a head of vertical movement type for seating against an external valve seat formed at the projecting end; (c) a first element for compressing the head of the vertical movement type against the external valve seat, such that the primary valve is normally closed to prevent the leakage of this pressure; (d) a secondary valve located in the second cylindrical section, said secondary valve including a cylindrical seat part and a fastener, the cylindrical seat part securing sealingly inside the second cylindrical section, and forming an internal valve seat at one end , and at an opposite end located adjacent to the first element for compression, the fastener having at one end a rod post approximate to a terminal end of the valve stem inside an internal bore defined through the seat part, and a valve one way type retained inside an annular recess defined in the fastener, around a base of the rod post; and (e) a second element for compressing the valve of the one-way type against the internal valve seat, such that the secondary valve is normally closed to prevent leakage of the pressure; in such a way that the coupling of a female portion of a quick-connect coupling with the projecting end of the connection, causes the first and second elements to compress, further compress, thus opening both the primary and secondary valves, thus allowing the flow through the passage, and making possible the rapid measurement of the pressure contained within the housing, by means of a pressure measuring device attached to an opposite end of the female portion.

15. The double seal coupling connection according to claim 14, characterized in that the first compressing element includes: (a) a stop spring is secured approximately between the first and second cylindrical sections; and (b) a first spring arranged concentrically about a valve stem, between the spring stop and the head of the vertical movement type of the valve stem, to compress the head of the vertical movement type against the external seat of the valve .

16. The double seal coupling connection according to claim 15, characterized in that a flange of the spring stop ensures the spring stop against an annular groove formed in the valve body within the passage, between the first and second cylindrical sections.

17. The double seal coupling connection according to claim 16, characterized in that the cylindrical seat part is sealed inside the second cylindrical section, by a ring-0 retained inside an annular groove defined circumferentially in the cylindrical seat part, and the opposite end of the cylindrical seat piece abuts against the spring stop.

18. The double seal coupling connection in accordance with that claimed in claim 14, characterized in that the second element for compression includes a second spring having an end secured concentrically to an arrow formed as part of an opposite end of the fastener, such that, when the threaded end of the connection is screwed into the threaded hole of the connector. housing, the second spring compresses the one-way type valve against the internal seat of the valve.

19. The double seal coupling connection according to claim 14, characterized in that the valve body provides a hexagonal portion between the protruding and threaded ends.

20. The double seal coupling connection according to claim 5, characterized in that it also includes a protective cover to cover the male portion of the quick connect coupling.

21. The double seal coupling connection according to claim 19, characterized in that it further includes: (a) a sheave to be placed around the threaded end of the connection, and that can be secured between the hexagonal portion and the housing, when the threaded end of the connection is screwed into the threaded hole in the housing; and (b) a protective cap, connected by means of a belt with the sheave, to cover the male portion of the quick connect coupling. SUMMARY OF THE INVENTION A double seal coupling connection makes rapid pressure measurement possible. The connection includes primary and secondary valves, and has one end configured as a male portion of a quick coupler, and another end that can be screwed into a threaded bore defined in a bearing housing. The connection defines first and second cylindrical sections one in communication with the other. The primary valve is located in the first section, and the secondary valve in the second section. The primary valve includes a valve stem with a vertical movement head. A first mechanism compresses the head of vertical movement against an external seat of the valve, to close the primary valve, thus preventing the leakage of pressure. The secondary valve provides a cylindrical seat part and a fastener. The piece is secured inside the second section, and defines through it an internal hole. The part forms at one end, an internal valve seat, and at an opposite end, is located adjacent to the first mechanism. The fastener has, at one end, a post approximate to a terminal end of the valve stem, inside the internal hole. The fastener also has a one-way valve retained inside an annular recess defined around a pole base. A second mechanism compresses the one-way valve against the internal seat of the valve, to close the secondary valve, thus preventing further pressure leakage. The coupling of a female portion of a quick coupler with the male portion opens the primary and secondary valves, and enables a rapid measurement of the pressure by means of a meter attached to the other end of the female portion. * * * * *