MXPA96002086A - Stabilized hose accessory paraacoplamie - Google Patents

Abstract

The present invention relates to coupling in the form of a rigid tube for connecting a first end of a hose to an adapter fastened to a body member wherein the hose has a second end to which a torque is applied and where the rigid tube has a first portion that is received and retained within a hole in the adapter and a second portion that is fixed to the first end of the hose, the improvement comprises: a non-circular member fixed to the body member; circular on the rigid tube, and a collar having a non-circular recess to receive the non-circular projection on the rigid tube, the collar includes axially extending arms defining non-circular surfaces that engage slidably with the non-circular member fixed to the body member to prevent rotation of the collar member and consequently of the rigid tube, with respect to the body member

Description

STABILIZED HOSE ACCESSORY FOR COUPLING.

FIELD OF THE INVENTION: This invention relates to fittings for hoses for coupling and more particularly, this invention relates to stabilized hose fittings for coupling such as couplings that are connected by thrust.

BACKGROUND OF THE INVENTION: Pneumatic devices, such as air brakes, are widely used in the automotive industry. Typically, compressed air to tanks is applied to the operating mechanisms of air brakes. through flexible hoses that have couplings on both ends. Typically, the hose is a reinforced hose which is fastened at a first end to a coupling which is connected by thrust and at an extreme second to a rotary coupling. In a vehicle in. ovimiento, when the rotary coupling moves with respect to the fixed coupling, the hose tends to twist. If the fixed coupling is a coupling that is connected by thrust, with a collar, there is a tendency for the coupling to degrade rapidly, wear and fail because the collar can not tolerate the rotational movement of a rigid tube received for which fixes the first end of the reinforced hose. Couplings that are connected by thrust are now highly desirable because they are less expensive than other types of couplings, are reliable and make fast connections. In situations where reinforced hoses are subject to torsional loads, the advantage of the quick-connect couplings has not been available because the couplings tend to fail.

SUMMARY OF THE INVENTION: In view of the aforementioned considerations, it is a feature of the present invention to provide an arrangement that permits the use of push-fit couplings with reinforced hoses subjected to torsional loads. The present invention is directed to a coupling in the form of a rigid tube for connecting a hose to an accessory, wherein the rigid tube includes a first portion that is received in the fitting and a second portion to which the hose is fixed not rotational entity The accessory includes the fixed component with a non-circular external periphery, inside which fixed component, the first end of the rigid tube is extended for axial retention by means of the accessory. It is improved in coupling described above by having a non-circular portion on the rigid tube disposed between its first and second portions and an anti-rotation component with respect to the fixed component. The anti-rotation component further has a non-circular inner portion which cooperates with the non-circular portion on the rigid tube to prevent rotation of the anti-rotation component with respect to the rigid tube. -In consequence, the moment applied to the hose is not transmitted by the rigid tube to any component of the accessory other than the fixed component.

BRIEF DESCRIPTION OF THE DRAWINGS: Figure 1 is a side view, with elevational portions illustrating a rigid tube connected to secure a reinforced hose to a push-fit coupling according to a first embodiment of the invention. Fig. 2 is a view taken along lines 2-2 of Fig. 1 and shows a hexagonal component cooperating with the rigid tube to prevent the rigid tube from rotating with respect to the coupling connection by pressing. Figure 3 is a side view of a rigid tube assembly configured in accordance with the principles of the present invention; Figure 4 is an end view taken in the direction of arrows 4-4 of Figure 3; 5 is a view similar to FIG. 3 but shows a threaded coupling engageable in the field to secure the reinforced hose a rigid tube with thread. Figure 6 is a side view of a second embodiment of this invention. Figure 7 is an end view of the second embodiment of the invention shown in Figure 6, taken in the direction of the flexes 6-6 of Figure 6. Figure 8 is a side view of a third embodiment of the invention; and Figure 9 is an end view of the third embodiment of the invention shown in Figure 8 and taken in the direction of arrows 9-9 of Figure 8.

DETAILED DESCRIPTION: Referring now to Figure 1, there is shown a valve body 10, such as a valve body used in an air brake (not shown). The valve body 10 has a through hole 12 which receives a push coupling coupling assembly 14. The po-push connecting coupling assembly 14 can have various configurations, such as those illustrated by the assemblies described in US patent application serial number 08 / 308,395, filed on September 20, 1994, which is incorporated herein by reference. reference. Each of these assemblies has a collar, such as the collar 16, which frictionally couples with a rigid tube, such as the rigid tube 20 illustrated, axially inserted in the direction of the shaft 22 within the coupling. 14 connection by thrust,. When the pipe 20 is pulled out of the push-fit coupling 14, the collar 16 radially seizes the rigid pipe 20, which prevents the pipe from coming out of the thrust connection coupling and thus from the valve body 10. Although a valve body 10 is illustrated and discussed, the device c-n to which the push connection coupling 14 is connected can be any device with which that coupling is used. As can be seen in figure 2, in conjunction with figure 1, fixed to the valve body 10 is a retaining collar 27 which has a hexagonal periphery with six flat sides. The retaining collar 27 can be threaded into internal threads in the mouth of the hole 12 and tightened so that it does not rotate with respect to the valve body 10. In any case, the retaining collar 27 is fixed to the body 10 of the valve. The rigid tube 20 has a first portion 30 which is received within the push-fit coupling 14 and is engaged by the collar 16 and a second portion 32 to which a reinforced hose 34 is held by a crimping fastening collar 36. . The second portion 32 of the rigid tube 20 has a plurality of annular tips 38 which are embedded in the inner wall 40 of the hose 34 when the clamping collar 36 is deformed by crimping. This fixes the hose 34 non-rotatably reinforced to the second end 32. of the rigid tube 20, Typically, the reinforced hose 34 has a rotary coupling 41 in the second-end, however, when the coupling 41 is moved, a twisting force 42 is applied through the hose 34 to the coupling 14 which is push to connect. -Although a rotary coupling 41 is shown, the second end of the hose 34 can be connected by another coupling 14 which is connected by thrust -or- any -other type of coupling. As best seen in Figures 3 and 4, disposed between the first portion 30 and the second portion 32 of the rigid tube 20 is a radial projection 46. As can be seen in Figure 4, the radial projection 43 has a hexagonal periphery 48. As can be seen in Figure 3, the radial projection 46 is received in a hexagonal base 50 formed in a circular portion 52 of a collar 54. The hexagonal recess 50 complements the hexagonal periphery 48 of the projection 46 so that the radial projection, does not rotate in the hexagonal recess, Just behind the hexagonal recess 50 is a circular hole 56 having an internal diameter 58 that complements the outer diameter 60 of the rigid tube 20. As the circular collar 54, it is sandwich between the crimping or curling collar 36 and the radial projection 46 seated in the hexagonal recess 50, the collar 54 is rigidly fixed with respect to the rigid tube 20. Projecting axially of the circular portion 52 of the collar 54, there is a pair of arms 64 and 66 having opposite flat surfaces 68 and 70. The opposing flat surfaces 68 and 70 are spaced the same distance as the planes 29 of the periphery 28 -xagonal of the retaining collar 27 which is fixed to the valve body 10. According to the above, when the rigid tube 20 with the reinforced hose 34 clamped -is pushed into the coupling assembly 14 which is pushed to connect, with the surfaces 68 and 70 of the arms 64 and 66 respectively aligned with the flat surfaces 29 of the hexagonal accessory 27 , the rotation of the rigid tube is restricted, Accordingly, the torsion - applied to the hose 34, is applied to the fixed attachment 27 which does not rotate. As a result, the first end of the rigid tube 20 does not rotate within the coupling assembly 14 - which is biased when torque is applied to the reinforced hose 34. This prevents failure of the coupling assembly 14 which is connected by engagement because the first portion 30 of the rigid tube 20 rotates inside the collar 16 (see Figure 1). Now, with reference to FIG. 5, the invention used is shown with a threaded coupling that is clamped in the field where the reinforced hose 34 is threaded on a threaded nipple portion 80 of the rigid pipe 20. The threaded nipple portion 80 has a first thread 82 with great thread inclination for coupling with the inner surface of the wall 40 of the hose 34 and a second thread 83 with fine inclination, for coupling with a complementary fine thread 84, on an annular portion 85 of a retaining collar 86.

Referring now to Figures 6 and 7, a second embodiment of the invention is shown, wherein the collar 54 has a single projection 90 which is received -in a complementary recess 92 within the valve body 10, to prevent rotation of the valve. rigid tube 20 with respect to the valve body. Referring now to FIGS. 8 and 9, a third embodiment of the invention is shown in which a pin 94 projects from the collar 54 and is received in a round hole 95 in the valve body 10 to prevent rotation of the rigid tube 20. with respect to the valve body. Typically, collar 54 is molded from nylon 6 with 15% fiberglass filler. A typical collar 54 will have an external diameter of 32 mm. approximately (1.25") and an inner diameter of 25.4 mm (lu) in order to complement a fixed hexagonal member 27 with a diameter of 25.4 m, (1") face to face. From the foregoing description, one skilled in the art can easily contemplate the essential characteristics of this invention and, without departing from the spirit and scope thereof, can make various changes and modifications of the invention to adapt it to various uses and conditions.

Claims (12)

R E I V I N D I C A C I O N S

1. - In a coupling in the form of a rigid tube to connect a hose to an accessory, where the rigid tube includes a first portion that is received in the fitting and a second portion to which the hose is attached without rotation, and in wherein the attachment includes a fixed component within which the first end of the rigid tube is extended for axial retention by the accessory, the improvement comprising: a non-circular portion on the rigid tube disposed between its first and second portions; an antirotation component having a securing portion cooperating with the fixed component to prevent rotation of the anti-rotation component with respect to the fixed component, the anti-rotation component further having a non-circular inner portion cooperating with the non-circular portion on the rigid tube for preventing rotation of the anti-rotation component with respect to the rigid tube, whereby the torque applied to the hose is not transmitted by the rigid tube to any component of the accessory other than the fixed component.

2. The improvement according to clause 1, wherein the non-circular component on the tube is a projection on the tube and the non-circular portion of the anti-rotation component is a non-circular recess that receives and complements the non-circular projection. 3.- The improvement according to clause 2, where projection has a hexagonal external periphery and the recess has a hexagonal internal periphery. 4. The improvement according to clause 3, wherein the securing portion of the anti-rotational component consists of at least two non-arc surfaces. 5. The improvement according to clause 4, in which the two non-arc surfaces are opposite and receive between them the fixed component. 6. The improvement according to clause 5, wherein the fixed component has a hexagonal periphery coupled by non-arc surfaces. 7. The improvement according to clause 3, wherein the securing portion of the anti-rotational component is a projection extending axially and wherein the fixed component is an orifice associated with the accessory to receive the projection. 8. The improvement according to clause 7, where the projection is a spike and the hole is round. 9.- In a coupling in the form of a rigid tube to connect a first end of a hole to an accessory fastened to a body member where the hose has a second end to which a torque is applied, wherein the Rigid tube has a first portion that is received in the fitting and a second portion that is fixed to the first end of the hose, the improvement comprising: a non-circular member fixed to the body member; a non-circular radial projection on the rigid tube; and a collar having a non-circular recess for receiving the non-circular projection on the rigid tube, the collar includes axially extending arms defining non-circular surfaces that desperately engage with the non-circular member fixed to the body member to prevent rotation of the collar member and consequently of the rigid tube, with respect to the body member. 10. The improvement according to clause 9, wherein the member does not circulate fixed to the body member has a hexagonal shape. 11. The improvement according to clause 10, wherein the recess in the collar is a non-circular recess that extends radially from a circular hole having a diameter equal to the diameter of the rigid tube. 12. The improvement according to clause 11, where the recess in the collar is hexagonal and the projection on the rigid tube is hexagonal. R E S UM E N Using an anti-rotation collar, failures in the clamping devices that are connected by thrust are prevented, for example, reinforced hoses connected to holes in valve bodies. The holes have a projecting external hexagonal nut fixed to the valve body. A rigid tube is received within the push-fit coupling which according to a first embodiment, has fixed a collar with a pair of arms that have flat surfaces that couple on opposite planes of the hexagonal nut. According to the second and third embodiments of the invention, the anti-rotation collar has a projection, such as a spigot, which is received in a fixed hole in the valve body. The collar has a hexagonal recess that receives a hexagonal projection from the rigid tube that prevents the rotation of the collar with respect to the tube. In this way, the tube is fixed with respect to the valve body and does not rotate so as not to cause failure of a collar within the thrust coupling coupling radially engaging a first portion of the rigid tube to axially retain the rigid tube in The coupling. A second portion of the rigid tube has one end of the reinforced hose fixed thereto by either a collar fixing by corrugation or a screw thread.