TW201707873A - Support for elastomeric disc valve in combustion driven fastener hand tool - Google Patents

Abstract

A valve support for use with a valve in a combustion driven fastener hand tool, the valve being formed by a flexible disc affixed to a central shaft having a circumferential edge resting against an anular valve seat affixed to a wall of a combustion chamber with the valve in a closed position is disclosed. The valve support comprises a plate affixed to the central shaft and against the flexible disc, the plate having one or more ports therethrough. In a closed position, the flexible disc has a circumferential edge resting against an anular valve seat affixed to a wall of a combustion chamber but also a central portion of the flexible disc is proximate or contacting a central portion of the support plate on the same side of the disc as the annular valve seat. Various port configuration are possible.

Description

Support for elastic disc valve in a combustion driven fastener hand tool [Cross-Reference to Related Applications]

This part of the continuation application claims the following concurrently pending and jointly accepted US invention patent applications in accordance with 35 U.S.C. §120:

U.S. Patent Application Serial No. 14/839,765, filed on Aug. U.S. Patent Application Serial No. 62/043,297, the entire disclosure of which is incorporated herein by reference.

The present application claims the benefit of the following U.S. Provisional Patent Application, which is hereby incorporated by reference in its entirety in its entirety in the the the the the the the the

U.S. Provisional Patent Application No. 62/172,783, filed on Jun. 8, 2015, which is incorporated herein by reference.

The present invention relates to a combustion drive fastener hand tool. In particular, the present invention relates to a combustion drive fastener having a control valve between two portions of a combustion chamber. With.

Dynamic fastener driving tools (such as nail guns) have existed for decades. Perhaps unfortunately, the first generation of commercial nail guns was introduced in 1950 after the Second World War, and the technology for rapid combustion of projectiles was greatly improved. The first generation of nail guns was pneumatic and driven by compressed air. Although aerodynamic power is still the most popular, fastener drive tools using other power components such as electric motors, solenoids, combustibles (such as gas or explosive powder) have also been developed over time. Some developments in technology related to power fastener drives and, in particular, combustion drive fastener tools have occurred. However, there is still a great need for further development.

A combustor (e.g., gas or powder) is used to force a piston driver against a fastener to drive a fastener hand tool to introduce a set of specific parameters that must be properly balanced to achieve a working device. In addition to fuel delivery and mixing components, the sizing of the combustion chamber and the installation of the valve are critical. Furthermore, the precise understanding of the combustion process can greatly influence the greater optimization of a given design for one of the improved power and efficiency. For example, we have determined that the use of a combustion chamber having a portion having a control panel therebetween can substantially improve the efficiency and power of a combustion drive fastener device. Furthermore, we have previously observed that the precise positioning of the starting position of the drive piston can be important in the operation of a combustion drive, particularly when the piston is heavy and may move due to its own weight.

A gas-driven tool motor comprising: a combustion chamber having one end at the end of the combustion chamber, is disclosed in U.S. Patent No. 8,925,517, the entire disclosure of which is incorporated herein by reference. An intake valve and the other end of the combustion chamber have an exhaust valve; and a control plate or control valve between the two portions of the combustion chamber. A piston or other positive displacement device is in communication with the combustion chamber. The intake valve and the exhaust valve have a closed position between the assembled open position for reloading the combustion chamber using the oil and gas mixture and the closed position of the positive displacement device for exploding and displacing the oil and gas mixture in the combustion chamber A sealing member that moves in common with one of the series. The control panel or control valve is supported from one of the combustion chambers The first portion of the second portion of the combustion chamber restricts gas flow, even in the closed position of the control valve for supporting two-stage combustion.

Adams teaches the use of a control valve and a control seat between the two portions of the combustion chamber having one of the sealing members fixed to a central shaft (which axially moves to open and close the valve) and in the closed position therebetween Form a gap. After the combustion in the first portion of the combustion chamber (where the control valve is closed), the leading edge of the flame moves toward the gap, preferably through the gap to drive an oil/gas mixture and just in the combustion chamber The combined oil/gas mixture in the second portion of the combustion chamber is compressed prior to ignition in the two portions to produce more power to the fastener drive than the undivided combustion chamber of one of the same amount of fuel from the combustion.

Alternatively, the Adams teach includes a spring loaded lift control valve having one of a chamfer edge that moves along a central axis and has one of abutting against one of the combustion chamber walls and a control valve seat offset Sealing member. Moving through the flame front of the first combustion chamber portion against the spring bias and opening the valve, preferably driving an oil/gas mixture through the gap and compressing the combustion chamber just prior to ignition in the second portion of the combustion chamber The combined oil/gas mixture in this second part. Next, the combustion in the second portion of the chamber closes the valve.

Adams also discloses the use of one of the control plates fixed to a central shaft (which moves axially to open and close the valve), which forms a sealing member and control valve similar to that described above between the plate and the cylinder wall. The gap between the control seats acts as an annular gap. A limited size opening can be additionally made through the control panel to support limited flow through the control panel. In a similar manner, the control panel can alternatively be secured to the cylinder wall to allow a central shaft to move freely through a central aperture of the control panel. In this case, the restricted flow through the control panel is separately formed by the restricted size opening through the panel.

The various control valve and control panel embodiments taught by Adams produce equivalent flow in both directions (ie between the sealing member and the seat or control panel) (where the valve is in the closed position) Or additional moving parts and complexity are required, namely a poppet valve with a spring and a control panel that moves over the tie bar, which limits the life of the device that is subjected to combustion gases. The control panel is closed by one of the teachings of Adams (even with one of the orifices closing the control panel) to block the combustion pressure between the two portions of the combustion chamber.

In view of the above, there is a need in the art for a control valve apparatus and method for controlling operation between two portions of a combustion chamber within a combustion drive fastener hand tool. There is a need for such devices that improve efficiency and the drive power delivered. There is also a need for such devices and methods that cover many uses and operate reliably and efficiently at a reduced cost. These and other needs are met by the present invention as detailed below.

A valve support for use with a valve in a combustion drive fastener hand tool formed by a flexible disk secured to a central axis having a circumferential edge, the circumference The edge abuts against an annular valve seat that is fixed to one of the walls of a combustion chamber, wherein the valve is in a closed position. The valve support includes a plate secured to the central shaft and abutting the flexible disk, the plate having one or more ports therethrough. In a closed position, the flexible disk has a circumferential edge abutting against one of the annular valve seats of one of the walls of the combustion chamber and a central portion of the flexible disk is also close to or in contact with the same A central portion of the support plate on the side of the disk of the annular valve seat. Various port configurations are possible.

An exemplary embodiment of the present invention includes a combustion drive hand tool having a portion between two portions of a combustion chamber including a combustion drive hand tool secured to a flexible disk of a movable center shaft a control valve, wherein the control valve is disposed in an open position, wherein a circumferential edge of the flexible disk is away from a valve seat on a wall of the combustion chamber; and the control valve is disposed in a closed position, Wherein the circumferential edge of the flexible disk is in contact with the valve seat, the control valve includes: a plate fixed to the movable central axis adjacent to the flexible disk and disposed in the same valve seat One side of the flexible disc is Supporting the flexible disc such that the flexible disc is not crushed by the valve seat under reverse pressure, wherein the control valve is in the closed position; and one or more ports pass through the plate The one or more ports are allowed to freely flow between the two portions of the combustion chamber at a forward combustion pressure, wherein the control valve is in the closed position. The central shaft can include two portions that are coupled to the flexible disc and the plate interposed therebetween. Additionally, a crossbar can be disposed on the central axis of the flexible disc adjacent the panel.

The plate may include one or more radial spokes having the one or more ports therebetween. The one or more radial spokes may extend to a circumferential ring. Additionally, a plurality of radial segments may extend from the circumferential ring toward a center of the plate. In other embodiments, the plate may include a plurality of parallel grooves through which the ports are formed or a plurality of circular holes through which the ports are formed.

A typical method embodiment of the present invention for controlling combustion in a combustion-driven hand tool, the combustion-driven hand tool being included in a combustion-driven hand tool comprising a flexible disk fixed to a movable central axis a control valve is disposed between two portions of a combustion chamber, wherein the control valve is disposed in an open position, wherein a circumferential edge of the flexible disk is away from a valve seat on a wall of the combustion chamber; And the control valve is disposed in a closed position, wherein the circumferential edge of the flexible disk is in contact with the valve seat, the method comprising the steps of: securing a plate to the movable adjacent to the flexible disk a central shaft disposed on one side of the flexible disc identical to the valve seat to support the flexible disc, wherein the control valve is in the closed position; passing through the positive combustion pressure One or more ports of the plate allow combustion pressure to flow freely between the two portions of the combustion chamber, wherein the control valve is in the closed position; and the plate is used to support the flexible disk such that it is reversed The flexible under pressure Not destroyed by the pressure disc valve seat. Embodiments of this method for controlling combustion in a combustion driven hand tool can be modified in conjunction with other apparatus and methods described herein.

An alternative embodiment of the present invention can include a combustion driven hand tool having a control valve between two portions of a combustion chamber, the control valve including: a central shaft movable axially within the combustion chamber, The combustion chamber is divided into two portions separated by a valve seat on one of the walls of the combustion chamber; a flexible disk fixed to the central shaft such that the central shaft is movable to be disposed in an open position The control valve, wherein a circumferential edge of the flexible disc is remote from the valve seat and in a closed position, wherein the circumferential edge of the flexible disc is in contact with the valve seat; a plate fixed to the Moving the central shaft adjacent to the flexible disk to support the flexible disk such that the flexible disk is not crushed by the valve seat under reverse combustion pressure, wherein the control valve is in the closed position And one or more ports passing through the plate such that the one or more ports allow for a free flow of combustion pressure between the two portions of the combustion chamber at a forward combustion pressure, wherein the control valve is located In the closed position. This combustion-driven hand tool embodiment can be modified in conjunction with other apparatus and methods described herein.

Another embodiment of the invention includes a combustion driven hand tool comprising: a combustion chamber member for containing and directing combustion gases to drive a fastener, the combustion chamber member being separated by a valve seat a two portion; a central shaft movable axially within the combustion chamber member; a plate secured to the movable central shaft and adjacent to the flexible disk to support the flexible disk such that The flexible disc is not crushed by the valve seat under combustion pressure, wherein the control valve is in the closed position; and one or more ports are passed through the plate such that the positive combustion pressure is Or a plurality of ports allow combustion pressure to freely flow between the two portions of the combustor member, wherein the control valve is in the closed position. This combustion-driven hand tool embodiment can be modified in conjunction with other apparatus and methods described herein.

Yet another embodiment of the present invention includes a combustion driven hand tool having a control valve between two portions of a combustion chamber, the control valve including: a central shaft movable axially within the combustion chamber, The combustion chamber is divided into two portions separated by a valve seat on one of the walls of the combustion chamber; and a flexible disk fixed to the central shaft such that the central shaft is Moving the control valve disposed in an open position, wherein a circumferential edge of the flexible disk is remote from a valve seat fixed to one of the walls of the combustion chamber and is in a closed position, wherein the flexible circle The circumferential edge of the disk is in contact with the valve seat of the wall secured to the combustion chamber. Contact between the circumferential edge of the flexible disc and the valve seat, wherein the control valve is in the closed position, limits the reverse pressure to a first portion of the combustion chamber. The flexible disc can include an elastomer. Additionally, a crossbar can be disposed on the central axis of the flexible disc adjacent the panel. This combustion-driven hand tool embodiment can be modified in conjunction with other apparatus and methods described herein.

100‧‧‧Combustion drive fasteners hand tools

102‧‧‧Combustion chamber intake valve

104‧‧‧ Stem disc

106‧‧‧Sparks

108‧‧‧Combustion part/lower part

110‧‧‧Combustion section/Part II

112‧‧‧Safety device

114‧‧‧Control valve

116‧‧‧Charge and exhaust valve

118‧‧‧ center axis

118A‧‧‧下下

118B‧‧‧上上

120‧‧‧ Trigger

122‧‧‧ drive

200‧‧‧Double combustion chamber assembly

204‧‧‧ Spring

206‧‧‧Flexible disc

208‧‧‧crossbar

300‧‧‧Support board

302A‧‧‧Flange

302B‧‧‧Flange

304‧‧‧Center through hole

306‧‧‧Port

500‧‧‧ combustion chamber wall

502‧‧‧ steps

Referring now to the drawings in which like reference numerals refer to the corresponding parts throughout the drawings: FIG. 1A and FIG. 1B show one of the exemplary fuel-driven fastener hand tools for use with one embodiment of the present invention. 2 is an exploded view of an exemplary dual combustion chamber assembly for use with one of the exemplary combustion drive fastener hand tools of one embodiment of the present invention; FIG. 3 shows an exemplary combustion drive buckle An assembly and exploded view of an exemplary valve assembly embodiment of one hand tool; FIG. 4 shows a close-up of an assembled and exploded view of an exemplary valve assembly embodiment of an exemplary combustion drive fastener hand tool; FIG. Figure 5B shows an exemplary valve assembly operation with one example of a valve support embodiment of an exemplary combustion drive fastener hand tool; Figures 6A-6E illustrate the use of a plurality of ports separated by a plurality of radial segments Figure 6F shows only one spoke support without a circumferential ring; Figure 6G shows one of the series of parallel grooves through one of them; Figures 6H to 6K show different numbers and sizes Multiple circles The exemplary The panels; and Figures 6L and 6M illustrate an exemplary panel employing a combination of radial spokes extending from the center to a circumferential ring and a plurality of spoke segments also extending from the circumferential ring toward the center.

1 Overview

As mentioned previously, the present invention discloses a valve support for use with one of a combustion drive fastener hand tool that is flexible to one of a central axis having a circumferential edge A disk is formed that abuts against an annular valve seat that is fixed to one of the walls of a combustion chamber, wherein the valve is in a closed position. The valve support includes a plate secured to the central shaft and abutting the flexible disk, the plate having one or more ports therethrough. In a closed position, the flexible disk has a circumferential edge abutting against one of the annular valve seats of one of the walls of the combustion chamber and a central portion of the flexible disk is also close to or in contact with the same A central portion of the support plate on the side of the disk of the annular valve seat. Various port configurations are possible.

It should be noted that although an exemplary embodiment of the present invention is shown herein as being applied to the use of a portion that is separated by a control valve or plate and that uses a gas and air mixture to load one of the combustion chambers to operate one of the combustion drive fasteners. The tool (e.g., as described in U.S. Patent No. 8,925,517, the entire disclosure of which is incorporated herein by reference in its entirety in its entirety in its entirety in the the the the the the the the Rather, embodiments of the invention and any known separate combustion chamber requiring a valve between different portions of the combustion chamber may be employed, wherein the valve is required to allow combustion gases to flow in one direction and to block combustion gases in opposite directions Flowing on. Thus, the use of a separate combustion chamber in any other known application can be used with embodiments of the invention as would be understood by those skilled in the art.

An important feature of an embodiment of the invention is that one or more ports in the support plate are designed to allow combustion pressure to pass freely between the two portions of the combustion chamber. A prior art device such as that described in the patent No. 8,925,517 uses a valve between two portions of the combustion chamber board. However, such valve plates are designed to limit or block combustion. Even if these valve plates contain orifices, the orifices only allow ignition to be transmitted from the pre-combustion chamber to the main combustion chamber. These orifices allow the pressure to equalize between the two parts of the combustion chamber over time, but the combustion pressure is much faster. Accordingly, such prior art valve plates do not allow combustion pressure to pass freely between the two portions of the combustion chamber, even with orifices. Moreover, even if orifices of sufficient size are employed in such prior art valve plates to allow combustion pressure to freely pass between the two portions of the combustion chamber, the orifices will return to the pre-combustion chamber by allowing reverse pressure. The purpose of the valve plate is not effective. In contrast, embodiments of the present invention support a flexible disc valve that individually blocks reverse pressure.

2. Exemplary combustion drive fastener hand tool

1A and 1B are cross-sectional views of a fuel loading operation of one exemplary combustion drive fastener hand tool 100 for use with an embodiment of the present invention. Figure 1A shows the combustion chamber intake valve 102 in an open position in which the valve stem disk 104 is used to create a spark. Note that the valve stem disc is disposed above the spark point 106 of the igniter assembly. When a pressure is applied to the safety device 112 as the user presses the head of the tool against a surface, an oil/gas mixture is used to load the two combustion chamber portions 108, 110. The chamber intake valve 102, the control valve 114, and the charge and exhaust valve 116 are all disposed on a common central shaft 118. The trigger 120 is mechanically coupled to the central shaft such that all of the valves 102, 114, 116 are moved together to the closed position by the user toward the portable pull trigger 120, as shown in Figure IB. As the valves 102, 114, 116 are in the closed position, the stem disk 104 is positioned to coincide with the spark point 106 of the igniter assembly to provide the most recent separation for spark generation. In this position, one of the control valves 114 secured to the central shaft 118 is configured to have a circumferential edge that abuts against one of the valve seats of the combustion chamber wall. A support member of the control valve is also secured to the central shaft 118 and disposed below the flexible disc.

Ignition combustion is performed in portion 108 below the combustion chamber (which may also be referred to as the pre-combustion chamber) using a valve as shown in FIG. 1B. High-speed combustion gas under positive pressure drives open control valve 114 The disk may be scratched to further pressurize and ignite the oil and gas in the second portion 110 of the combustion chamber (which may also be referred to as the main combustion chamber). After ignition in the second portion 110 of the combustion chamber, the reverse pressure is prevented from flowing to the lower portion 108 by the control valve 114 to improve the overall power output of the tool. Combustion in the second portion 110 of the chamber forces the driver 122 to drive a fastener down to the surface below the head.

2 is an exploded view of an exemplary dual combustor assembly 200 for use with one of the exemplary combustion drive fastener hand tools for use with one embodiment of the present invention. The intake, control, and charge and exhaust assembly 202 includes a central shaft 118 having a spring 204 that retains the assembly 202, wherein the valve is in a generally open position. The chamber intake valve 102, the stem disk 104 for generating a spark, the flexible disk 206 of the control valve 114, and the charge and exhaust valve 116 are fixed to the center shaft 118. The control valve 114 also includes an optional crossbar 208 that assists in controlling the form of the flexible surname disc when the combustion gases are allowed to pass.

3. Support plate for flexible disc control valve

3 shows an assembled and exploded view of an exemplary valve assembly 202 embodiment of an exemplary combustion drive fastener hand tool. Assembly 202 can be comprised of two portions 118A, 118B of central shaft 118. The combustion chamber intake valve 102 and the valve stem disk 104 for generating sparks can be directly mechanically applied to the lower portion 118A of the central shaft 118 and the charge and exhaust valve 116 can be directly mechanically applied to the upper portion 118B of the central shaft 118. The two portions 118A, 118B can be assembled, for example, according to a threaded, bonded or press fit joint or any other suitable type of joint, wherein the components of the control valve 114 are clamped to portions 118A, 118B of the central shaft 118. In the joint between the two upper flanges (or stepped surfaces) 302A, 302B. Control valve 114 includes a support plate 300 beneath the flexible name disc 206. Support plate 300 includes one or more ports 304 through plate 300. An optional crossbar 208 is located above the flexible disc 206.

4 shows a close-up of an assembled and exploded view of the control valve 114 of an exemplary valve assembly 202 embodiment of an exemplary combustion drive fastener hand tool. In this example, the support plate 300 includes a disk having a diameter smaller than the diameter of the flexible disk 206 such that the flexible disk The diameter extends beyond the support plate 300 to the valve seat of the combustion chamber wall. The support plate 300 includes a central through bore 304 to receive the central shaft 118 and secure the support plate 300 in a stack of control valve 114 assemblies. The support plate 300 also includes a plurality of ports 306 that pass through the support plate 300. The passage through the plate 300 allows combustion from the portion 108 below the combustion chamber to flow freely to the upper portion 110 of the combustion chamber.

In this example, the support plate includes five equal semi-circular segments. In some alternative embodiments, the port may be of an open shape rather than a closed shape such that the total support plate 300 does not have the form of a spoke of one of the rims. Any combination of open and closed shapes can be used to form port 306 through support plate 300. In general, a balance is achieved between the thickness of the panel, the number and size of ports 306, the thickness of the segments between the ports, and the nature of the material. As will be appreciated by those skilled in the art, the support plate 300 must be strong enough to support the flexible disk 206 and allow it to form one of the valve seats against the outer circumference of the plate 300 under the reverse combustion pressure to fit the seal.

5A and 5B illustrate the operation of an exemplary valve assembly with one example of a valve support embodiment of an exemplary combustion drive fastener hand tool. Both Figure 5A and Figure 5B show the control valve 114 in a closed position. In this closed position, the control valve 114 is desirably used as a flow allowing for forward combustion flow from the portion 108 below the combustion chamber to the upper portion 110 of the combustion chamber and limiting (ideally, preventing) combustion flow in the opposite direction. To the valve.

FIG. 5A shows a flexible disk 206 having a circumferential edge abutting a seat wall of the combustion chamber wall 500. The seat is formed by a step 502 of the combustion chamber wall 500. In FIG. 5A, the flexible disk 206 is shown to appear under no pressure or would ideally occur at a reverse combustion pressure from the upper portion 110 of the combustion chamber. In fact, some leakage may occur from the upper portion 110 to the lower portion 108 at the reverse combustion pressure. Since the backflow prevents the flexible disc 206 from being pressed into the lower portion 108 of the combustion chamber by the valve seat at the combustion pressure from the upper portion 110 of the combustion chamber, the support plate 300 below the flexible disc 206 significantly limits the backflow. .

Figure 5B shows the fixation at the forward combustion pressure from the portion 108 below the combustion chamber. A flexible disk at a center point of one of the central axes 118. This is the case for the flexible disk 206 under positive pressure from the portion 108 below the combustion chamber. In such situations, the combustion flame front forces an air/fuel mixture through one or more ports 306 in the support plate 300 of the control valve 114 from the lower portion 108 of the combustion chamber to the upper portion 110 and causes the flexible disk 206 It is bent upward at an edge around a central valley formed around the cross bar 208. Since the flame front is driven by combustion originating in the portion 108 below the combustion chamber, the ignition of the air/fuel in the upper portion 110 of the combustion chamber occurs at a higher initial pressure, improved from above the combustion chamber. The combustion in section 110 is delivered to the power of the fastener.

It is important to note that only the support plate 300 does not inhibit any type of pressure flow, i.e., any direction (forward or reverse) between a low pressure gradient or high velocity combustion gas or two portions of the combustion chamber, wherein the control valve 114 Located in the closed position. Port 306 provides too much path to suppress any pressure differential. However, since the control valve 114 is in the closed position, the high velocity combustion gases at the reverse pressure (i.e., would otherwise return to the lower portion 108 of the combustion chamber) are blocked by the flexible disc 206 that is sealed against the valve seat.

The crossbar 208 is an optional component of the control valve 114 that assists in maintaining the shape of the flexible disc 206 under combustion flow from the lower portion 108. However, if a crossbar 208 is employed, the port 306 of the support plate 300 can be optimally configured such that when assembled a material of the panel forms a line directly below the rail and aligned with the rail (eg ) Two collinear spokes extending from opposite sides of a central hub. This is because the line below the valley of the crossbar is substantially closed in all cases, so it is preferred to maximize the support in this area.

The material of the support can be any suitable structural material that can withstand temperature and combustion and provide suitable support to the flexible disk. For example, any suitable alloy of aluminum and steel or the like can be used. However, other materials such as composites and heat resistant plastics are also feasible. Suitable materials for flexible discs must similarly survive temperature and combustion without degradation. However, in this case the material must also have the necessary flexibility for the application. Elastomeric materials such as polyoxygen, fluorocarbon, fluoropolyoxygen, buna, ethylene-propylene can be used. Aene, neoprene, chloroprene and other suitable rubber and polymer materials.

6A-6L show an exemplary alternate port configuration of the panel 300 of various embodiments of the present invention in a top view and an isometric view. (Note that in all cases the center of the plate 300 has a hole for mounting to a central shaft 118 that is not shown.) Various port designs are possible based on the particular application. These examples are shown to illustrate possible configurations that are not limited to the particular size or number of elements used. The most important is to design the port to allow free forward combustion flow and also provide sufficient support for the flexible disk to limit or prevent reverse combustion flow. As previously mentioned, for applications employing a crossbar 208, aligning the crossbar 208 with the support of the panel 300, if possible, may be optimal, such as if an even number is present, then the alignment is crossed. To the support.

6A-6E illustrate a plate employing a plurality of ports separated by a plurality of radial segments extending to a circumferential ring. Each port includes an annular section through one of the plates. Although the examples show six, five, four, three, and two ports, respectively, in Figures 6A-6E, those skilled in the art will appreciate that one plate having any number of ports can be created in this configuration.

Figure 6F shows a novel design using only one spoke support without one of the circumferential rings. In this case, the flexible disk is only supported annularly by the valve seat. Although five spoke supports are shown, any number of spokes of any suitable thickness and width can be used.

Figure 6G illustrates a plate having a plurality of parallel slots therethrough. Any suitable number of slots and sizes (width and length) can also be used here.

Figures 6H through 6K illustrate exemplary panels employing a plurality of circular apertures of varying numbers and sizes. The example panels each have eighteen, five, four, and six circular ports that are symmetrically spaced about the panel. Circular holes (or other shapes) of different sizes can also be used on a single plate.

6L and 6M illustrate the use of radial spokes extending from the center to a circumferential ring (three spokes in FIG. 6L and two spokes in FIG. 6M) and a plurality of spoke segments extending from the circumferential ring toward the center (Fig. An exemplary plate combining one of three spoke segments in 6L and four spoke segments in Figure 6M. Here again, any number of radial spokes and spoke segments can be employed.

The description of the preferred embodiment of the invention is hereby ended. The above description of the preferred embodiment of the invention has been presented for purposes of illustration and description. The description is not intended to be exhaustive or to limit the invention to the precise form disclosed. Many modifications and variations are possible within the scope of the above teachings. Additional variations of the invention are contemplated without departing from the inventive concepts as set forth in the appended claims.

114‧‧‧Control valve

116‧‧‧Charge and exhaust valve

118A‧‧‧下下

118B‧‧‧上上

206‧‧‧Flexible disc

208‧‧‧crossbar

300‧‧‧Support board

302A‧‧‧Flange

302B‧‧‧Flange

304‧‧‧Center through hole

306‧‧‧Port

Claims (14)

A combustion drive hand tool having a control valve between two portions of a combustion chamber including a combustion drive hand tool fixed to one of a movable center shaft, wherein the control valve system Positioned in an open position, wherein one of the circumferential edges of the flexible disc is remote from a valve seat on one of the walls of the combustion chamber; and the control valve is disposed in a closed position, wherein the flexible disc is The circumferential edge is in contact with the valve seat, the control valve comprising: a plate secured to the movable central axis adjacent the flexible disk and disposed in one of the flexible disks identical to the valve seat Supporting the flexible disc on the side such that the flexible disc is not crushed by the valve seat under reverse pressure, wherein the control valve is in the closed position; and one or more ports are worn Passing the plate causes the one or more ports to allow free flow of combustion pressure between the two portions of the combustion chamber at a forward combustion pressure, wherein the control valve is in the closed position. The fire-driven hand tool of claim 1, wherein the plate includes one or more radial spokes having the one or more ports therebetween. The fire-driven hand tool of claim 2, wherein the one or more radial spokes extend to a circumferential ring. A combustion-driven hand tool of claim 3, wherein the plurality of radial segments extend from the circumferential ring toward a center of the plate. A combustion-driven hand tool of claim 1 wherein the plate includes a plurality of parallel slots formed therethrough to form the ports. A combustion-driven hand tool according to claim 1, wherein the plate includes a plurality of circular holes through which the ports are formed. The fire driving hand tool of claim 1, wherein the central shaft includes and is interposed therebetween The flexible disk and the two portions of the plate are coupled together. A method of controlling combustion in a combustion-driven hand tool, the combustion-driven hand tool comprising two portions of a combustion chamber of a combustion-driven hand tool fixed to one of a flexible disk of a movable center shaft Having a control valve, wherein the control valve is disposed in an open position, wherein a circumferential edge of the flexible disk is away from a valve seat on one of the walls of the combustion chamber; and the control valve is disposed in a closed position In the position, wherein the circumferential edge of the flexible disk is in contact with the valve seat, the method comprising the steps of: securing a plate to the movable central axis adjacent to the flexible disk and disposed in the same One side of the flexible disk of the valve seat to support the flexible disk, wherein the control valve is in the closed position; allowing transmission through one or more ports through the plate under forward combustion pressure a combustion pressure freely flowing between the two portions of the combustion chamber, wherein the control valve is in the closed position; and the plate is used to support the flexible disk such that the flexible disk is under reverse pressure Will not be crushed by the seat The method of claim 8, wherein the panel includes one or more radial spokes having the one or more ports therebetween. The method of claim 9, wherein the one or more radial spokes extend to a circumferential ring. The method of claim 10, wherein the plurality of radial segments extend from the circumferential ring toward a center of the plate. The method of claim 8 wherein the board includes a plurality of parallel slots formed therethrough to form the ports. The method of claim 8, wherein the panel comprises a plurality of circular apertures therethrough forming the ports. The method of claim 8, wherein the central shaft comprises two portions coupled to the flexible disc and the plate interposed therebetween.