TW534963B - Variable volume valve for a combustion powered tool - Google Patents

Abstract

A variable volume metering chamber and valve assembly for a combustion-powered tool includes a housing defining a metering chamber having an internal volume and including an inlet and an outlet, and a plunger configured for reciprocal movement relative to the chamber for adjusting the internal volume of the metering chamber. The plunger is preferably adjustable by the user to alter the volume of fuel retained in the metering chamber. In the housing, a first valve controls control fluid flow through the inlet, a second valve controls fluid flow through the outlet, and an actuator assembly, connected to the valves, is sequentially operable from a first position, in which the first valve is open and the second valve is closed, to a second position, in which the first and second valves are both closed, and a third position, in which the first valve is closed and the second valve is open.

Description

534963 V. Description of the invention (1) [Related applications] This application was filed on May 4, 2001, and the US application No. 0 9/8 4 9, 6 0 6 π under review is used for combustion. "CONSTANT VOLUME VALVE FOR A COMBUSTION POWERED TOOL" part of the driving tool is pending. [Prior Art] The present invention relates to a fixed volume valve for a combustion driving tool, such as a power construction tool. (Power framing tool). In more detail, it relates to a fixed volume valve assembly that can measure the volume of a fluid before allowing it to flow into a combustion chamber. The invention also relates to a method for using a calibration fixture (c 〇l related fastener) type of pneumatic drive, combustion drive, or other fast-moving fastener-driven tools. Typically, for example, in the United States

Li re-issued his brothers 1.6.32,452, 1 ^ 丨 1 ^ 〇1: [(3] 1 US Patent No. 4,522,162; Nikolich US Patent No. 4,483,474;

U.S. Patent No. 4,40 3,72 2 by Nikolich, and U.S. Patent No. 4,4 8 3,4 7 3 by Wagdy, all of which are incorporated herein by reference, a combustion drive, driving into the fixed parts The tool system includes a combustion chamber defined by a cylindrical body and a valve sleeve configured to open and close the combustion chamber. Generally speaking, similar combustion-driven, driven nails and u-nail tools are commercially available from ITW-Paslode (a unit of the Illinois Tool Manufacturing Company) at Vernon Hi Us, Illinois, at its IMPULSE Sold under the trademark. In this tool, when the fixing part is driven into the workpiece, the driving stroke is

00517.ptd Page 5 534963 V. In the process of the description of the invention (2), a fixed force was applied. Measuring the amount of fuel to the combustion drive tool, or the amount of compressed gas with a drive, helps to provide _solid = one. In US Patent No. 4,721,240 issued to Cotta The fixed tool driven by combustion can be used by-cam displacement C; duct, the amount of which is equal to the fuel wide open = = read:-combustion volume. If the flow of the fluid is measured by time, i will be provided:针; Needle = J amount, which changes with the change of the flow rate of the fluid, and the emptying of the work t 'The flow rate of the fluid will follow the pressure of the cylinder;; :: :: The same ^ co-supplied gas The pressure in the fluid may also cause a difference in the energy supplied in each filling of the 5 Xuan cylinder. ≪ Here the size of the state-level college, the control of entering the combustion chamber, is shown in, patents 655,99 6 and 1 No. 29 3, 8 and 58. Two references to one and two: dagger body inlet valve and fluid discharge valve, which can support a mechanical supply: Zhitong =. The horse-burning flame is fed through this inlet valve to- And when the fuel exhausts its power, the machine returns: „,. Neither reference shows how to use such a system, "to fix a straight fluid. Furthermore, after a fuel is burned or the ancient soil expands, the fluid can no longer be used to provide power to the amount of muscle at that point. The test system has no effect. The U.S. Patent No. 4,913,331 issued to Utsumi can be used to drive a piston with an internal combustion engine, which uses a quantity of V;

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534963 V. Description of the invention (3) The reciprocating arrangement in a fixed volume fuel cylinder is the displacement of the piston, between the cylinder and the chamber to the combustion chamber. Wear, because the pressure of the lower temperature on the conventional fuel pair will be poor. In this case, a higher delay is generated than the proper flow, and the conventional burn may be higher. Therefore, the conventional fuel / air of the equivalent valve (rich blocks the air mixture with other fuel metering valves). Therefore, this type of device has a predetermined driving force. It includes the local activity. It should be filled with the measurement chamber. On either side of the row, the regular sealing of the piston decreases during continuous burning of the driving tool, leading to lower pressure and entering the burning driving tool or altitude operation that is blocking the tool. This is used for burning driving tools f ue 1 / air) One of the fuel quantity inventions of a fuel combustion engine that is difficult to drive is one of the improved solid measurement chambers. A fuel piston can be used in a fuel inlet flow path and the fuel outlet flow path through the inlet and outlet. It should be empty between runners. The displacement of the seal between the fuel piston and preventing fuel leakage from the pressurized fuel supply will cause the seals to quickly contact the cylinder surface. One of the operational shortcomings is that when the phase is relatively high, such as below 3 2 F, the pressurized combustion atmosphere and the fuel have a large pressure, the fuel does not dissipate, but quickly passes through the combustion chamber. This situation will operate efficiently during combustion. Another operational disadvantage of Suspension is that when there is relatively little air available to burn south of the south, 'having a fixed volume, it will excessively enrich the fuel mixture in its combustion chamber, which will Lead to the ignition system. Thus, there is a need to provide a device having the ability to adjust the combustible fuel. The measurement of a volume of fluid, such as a combustion-driven tool, to produce a solid

00517.ptd Page 7 534963 V. Description of the invention (4) Another improved fixed volume of the present invention is another aspect of the present invention, and the seal is not another aspect of the present invention, which is helpful as the tool It is invented that the combustion assembly is exposed to low temperature again, and it provides a relatively high purpose to adjust, to provide a fluid measurement in a small space. The object is to provide an improved fixed volume valve that is continuously worn against the sealing surface. The purpose is to provide an improved fixed-volume valve assembly movement, even when the fuel pressure drops, and the objects are to provide the fuel level to operate the mixture. Improved fixed-volume valve forces, such as when the tool is used in [Summary of Invention] These and other useful, series-editing devices' measure solid to align a tool pneumatically or with a tool. Before the closing of one valve and the opening of the other valve in the preferred embodiment, a fixed volume of fluid in the power tool of the present invention can meet or exceed this to provide a fixed energy. This device is driven by an internal combustion engine and is portable. The structure of the valve and the control mechanism also provides a delay between openings to ensure that the fluid moves downstream to the more detailed structure for an internal body structure. Used for phase volume. For the combustion chamber through which the metering chamber passes the inlet, the combustion drive and the reciprocating chamber for the combustion fluid inside the plunger are reciprocated to optimize the volume flow and quantity of the material. Provide a variable, including an external port and an outlet to move, use a metering chamber and valve housing that can be the volume used, define a metering chamber, and a plunger to adjust the inside of the metering chamber Adjust to change the first valve control in the housing to the second valve to control the fluid passing through the outlet

00517.ptd Page 8 534963 V. Description of the invention (5) The flow and the actuator assembly are operated sequentially, the first valve and the second valve are opened to the first position and the two are closed. Connected to the two valves, it can be placed from a first position to a third position, wherein the first and second valve systems are closed, the second position is closed, and the first valve system is closed at the third position. And the second valve system is opened. This metering valve also uses a solid because of the power of the tool every time, the pressure of the fluid body is based on the consistent quality and volume of the volume. Take measurements to ensure a more consistent supply of power to any location. Naturally, the volume of time will again make the tool empty. The short distance of the slope of the road makes the seat relatively upward. In the system, the flow rate system, the solid, compared with the angle, is particularly distant. With the impeachment, the shorter seal will change, because a flow system will also change and affect the fixed volume chamber. The fixed volume chamber can be used in the present invention with a more sophisticated other design. Non-time. When the pressure is the point, if. As long as the flow is enough to fill the metering chamber, it will pressurize the valve into the tool. In the present invention, the force changer will change the pressure rate and the metering will be full. The bomb can be used for collinear body supply to generate a fixed fuel and a power tool provided by the metering valve. When the tool provides a time, the fluid density will drop more or less densely. The inlet valve of a solid chamber is opened. The flow of liquid is being concentrated. The configuration of a spring-loaded valve. A compact portable configuration and one of the combustion chambers leading to the combustion chamber are more beneficial than the loading valve to control fluid flow. The inlet and outlet of the metering chamber of the valve form the seal, contacting the wall of the chamber only for a time. When the valve is opened and closed there is no continuous friction between adjacent walls. About the seal

00517.ptd Page 9 534963 V. Description of the invention (6) Lu's will cause a longer life. Another advantage of this valve assembly-the advantage lies in & This is even when the fuel fluidity is weakened, because when the outside operating temperature drops below the freezing point, it also helps the fuel to flow into a combustion chamber channel. A further feature of this valve assembly is that the actuating structure is provided on the operation of the upper and lower impeachment loading heads with a delay to ensure that the fuel is released to the combustion chamber at the lower valve, Fuel will remain in the metering chamber. In the preferred embodiment, this delay is achieved by the pairing of the rod of the actuator drag shaft link arm with a deliberate loosening of a pair of notches in the actuator. This moving engagement can ensure that, although the tool, the pivot link arm performs a continuous action, the mouth = cattle is not continuously moving, the operation of the spring-loaded valve ;; ::; Empty: The arm's 'pause'. In this way, the consistency of the volume of fuel temporarily can be maintained. Hai " Shili to Zhong ^^ Another feature of the valve assembly of this volume is that the valve μ withers In this preferred embodiment, this is made by providing a fuel for the combustion chamber, and the shaft can be advanced by the user to the screw thread. Count the entire axis to reach the volume of the chamber, and therefore reduce the amount of fuel entering the two to reduce this. When more fuel or thicker mixtures are needed, use space. Because the metering chamber is withdrawn to increase The volume of the chamber. A fuel mixture obtained from the fuel by pushing the shaft into the fuel metering chamber compared to the 4-axis

534963 V. Description of the invention (7) Yet another feature of the valve assembly is that the adjustable valve described above is replaced by an electric heating element, which is used when the tool uses two j-axis I to borrow. Used under the type of fuel pressure. The added condition of the metering chamber itself or the part surrounding the valve housing. 70 pieces of heating [Explanation of the invention] Referring to Figures 1 and 2, a fixed-volume valve assembly and meter denier h are marked as 10. In the following description, the term "upper, upper, lower, and inner faces are used to examine the orientation of the assembly as shown in the illustration. However, the" parts "are well known in the art, and the present invention The assembly can be used for a variety of different purposes. For example, the valve assembly 1 of this technology is very useful in a pneumatic or combustion driver, and the system is particularly useful. The tool has a valve housing. It is injected into it under the power of ink. The assembly 10 in this room provides a fixed amount of fuel to the process and the flow system. Or, it can be pre-determined. Pressurized gas, which can be expanded to provide power to this task. The valve assembly 10 of the present invention can be used for any job. 2 = tool, which benefits from a stable and uniform supply of a pressurized fluid. 3, the housing 12 of the valve assembly 10 includes at least two spring biased valves), a first spring-loaded valve 16 and a second & valve 1 8 'are respectively controlled toward a metering chamber 2 4 One inlet 2 0 蛊 /, the flow of carrier fluid. The metering chamber 24 is optionally provided with one or more ports in addition to the inlet 20 and the outlet 22 bounded by the housing 12, which will be described later. Neither the position of the measuring chamber 24 nor the position of the outlet 22 is particularly important. However, put 哕 1 into the outlet 22 and place it on the opposite end of the measuring chamber 24. 俜 A = 口 20 is the same as the carriage and carriage. In 00517.ptd V. Description of the Invention (8), in the structure, the spring-loaded valve 6 is kept in a space. The preferred ground plane here is about axial co-collinear flow, which will flow from the inlet 20: through the metering chamber 24, the axis of the spring-loaded valves 16, 18. μ outlet 22, substantially parallel to the metering chamber 24 can be any form of space to measure the fluid, that is: the second J is enough to provide-a fixed volume, which is equal to the release from the metering chamber 1: The fluid in the metering chamber is sealed in the metering chamber μ, t + / " L volume. At the same time, the flow system is a dense and independent container, or it can be simply rimmed to 24 or can be a (cv .. flat, electric, a cavity in the casing 12 and other elements, such as: bu = body The upper is also used to support the loading room 16, U of the propulsion system. "Ground: G2 quantity 8 (" second in Figure 1) and the spring is fixed. The adjustment of 4 to 24 relative to the shell 12 series is 々 if, 24 ί 体?, although it is best to be fixed, you can choose the spring room (not shown in the figure + _ column and s 'fine by the configuration of a movable wall or open to an additional system depends on the two valves. However' for The purpose of the measurement is t, its benefits are set, the performance of the valve: to 24, to maintain-a fixed volume, until some kind of heart;: Weekly is deliberately changed. Part 3 0, 3 2, σ load valve 1 Each of 6, 18 includes a first spring force, preferably a conical seat, cups 3, 4, 3, and a spring 3, 3, 0. Although the description of the article is based on the value of the valve 16 Viewpoints will be discussed, but it should be understood that the pop-up is applicable to the corresponding components of the second spring-loaded valve 18 and the structure, when the force-loaded valve 16 is in a closed position The size of the seat portion 30 is for hermetically engaging the inlet 20 of the measuring chamber 24.

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Page 12 534963 V. Description of the invention (9) The movement of the seat 30 between an open position and the closed position is controlled by the lever 34. Although the spring 38 is an economical method of biasing the valve, other biasing devices can be considered. The spring 38 is used to bias the valve 16 to the closed position. Each of the springs 38, 40 has an anchored end 42, 44 and a movable end 46, 48, respectively. By the urging force of the spring 40 against the fixed end 42, the moving end 46 exerts an urging force against the seat portion 30, tending to move it in the direction of the measuring chamber 24. Although the fixed end 4 2 can be directly fixed to the casing 12, preferably, the fixed end is installed in a compartment, which will be described in more detail below. The flow system is supplied to the casing 2 under pressure. It is generally expected that the tool is portable, and in this case, the flow system is fed from a pressurized tank 28 that is obstructed or added to the tool. Where the tool is used in a waste or other location where a large supply of pressurized fluid can be obtained, the tool is preferably passed through a hose or similar device (not shown in the figure) ) Get the fluid. The valve assembly of the present invention can be used in any of these cases, and can be considered in any setting. Because temperature and pressure affect the density of any fluid, these factors should be kept as constant as possible to minimize changes in the amount of fluid supplied. g; ^ Before entering the valve assembly, the fluid preferably flows through a filter ^ (Figure 2) to minimize excess contamination. The filter 50 is preferably arranged at one end of a joint 51, which abuts and tightly engages the tank 2 8. After passing through the filter 50, the fuel travels into the upper channel 5 2 ° the upper channel 5 2 From the source of the pressurized fluid, such as the pressurized tank OO, to the inlet 20 of the metering chamber 24. For the most consistent fluid

00517.ptd Page 13 534963 V. In the description of the invention (10), the upper channel 52 is better before the end of the ancient tidy ground is wide enough. The upper channel 52 is preferably. ^ In order to achieve a uniform supply pressure.乂 1 土 某 + 杳, ό 1 body, order: period; ΐΓ ϊ is provided for a person's department 54 to accumulate the increase of the godly flow, in the upper shirt, + example and 5, the flow rate of the fluid is The low bursts the fluid; when the inlet 20 opens, it flows into the lower A5 measurement chamber 24. The fluid released from the metering chamber 24 is spring loaded II :. The error is caused by the actuator assembly 60, and the metering is completed after the opening and closing of the first-and i-three-half 6Π to codes 16, 18. The instinct program can make the first and second spring-loaded valves 16 in the metering chamber 24 closed! Any mechanism that can be closed in order to be able to measure in the male 60: ... although a mechanical connection The lever device is a good model for the actuating cry, the heart is 60, but controls:-An example of an acceptable alternative structure. In the = 佳 # embodiment, the actuator assembly 60 includes _c 形 致 _ ^ ^ —the upper arm 62 ′ is connected to the first spring-loaded valve 16. The lower arm 64 ′ is connected to the rod μ 4 arm 6 2 of the second spring-loaded valve 18 and the lower arm 64 is connected to each other through a control arm 6 6 (FIG. J). A notch 67 on the control arm 66 is engaged by a pivoting iink arm 68, which is pivotally engaged to the housing 12 at one point. The specific inclination of the lever arm 68 and the notch "67 ^ is through a tongue 69. The control link arm 68 is operated by the movement of the nosepiece valve Unkage (shown at ^ in the figure), and its structure and operation are disclosed in the patent of Nik〇Uch, which is incorporated herein by reference. reference.

534963 V. Description of the invention (11) During the actuation of the actuator 62 λ 64, 66 of 18, the pressurized fluid can pass through the tenon 69 and the area of the preferred embodiment, so that the scale is moved slightly, The tenon 69 and the sloppiness pair are attached to the specific arm 66, which has the actuator in the case of moving the first and opened and which valve. An important feature of the assembly 60 is that in the displacement of the control arm and the upper and lower spring-loaded valves, a delay (de 丨 ay) will be formed, so that the fixed volume is maintained at the measurement time. Room 2 4 inside. This delay is partly caused by a loose mating engagement of one of the four notches 6 and 7. In comparison, compared with the notch 6 7, the tenon 6 9 is provided with a reduced travel path along which the control link arm 6 8 can be arched without causing the control arm 6 2, 6 4, and 6 of 6 moves. The looseness and "freedom" of the engagement between the mouths 6 and 7 can be changed with different applications, and the multi-port structure can also be changed, including the notch on the arm and the tenon on the control. ~ Assembly 60 In a first valve program or a second valve program, the first spring-loaded valves 16 and 18 depend on which valve must be closed. The valve program is based on a combustion The industrial combustion cycle, or the impact cycle of a pneumatic tool, is shown in Figures 3A-3C, which describes the valve program. When the tool is in use, the beginning of the first valve program is defined. At this position, the wheel is powered and ready to be used, but it has not come into contact with the pre-driving fixture M ″ workpiece. At this moment, the actuator assembly 60 is at the position shown in FIG. 3A, and the arm 62 is at a distance from one of the opposite walls of the housing 12 at a maximum.垓 The first spring-loaded valve 16 is located in an open position, and the second early steam-loaded valve 18 is closed. Because via the passage 52,

Page 15 534963 V. Description of the invention (12) 2 8 is connected. During the first valve procedure, the first bomb metering chamber 2 4 will therefore be filled with fuel and moved to start, but until the first valve procedure Caused by. In order to reach the appropriate position in the combustion chamber or the gas preparation mechanism and trigger the fuel filling of the mechanism, etc., the combustion chamber channel is 70 and the best implementation is started. The contact makes the arrow A indicate (important Is the quantity, and the flow is in the chamber. For the same volume when it occurs, the flow is chemically composed of the metering chamber 2 4. Now reference to the metering chamber 24 is only used for physical or chemical changes in the stream, the same The power is transmitted under this force for each cycle. When it is measured chemically or physically, it is better to enter the metering room with a closed first valve. In order to pass the entry into the beginning of an expansion, such as. If using a good occurs in a material from the measurement, and finally to the example, the process gets the pivot connected to Figure 1). ′ Pay attention to the body and 5 does not provide a fixed temperature and pressure body and can not be released positively, and the position is closed, and the first tool launches a fixed piece of energy, that is, in the cylinder. The tool contacts the combustion chamber's contact chamber 2 4 and flows through the combustion chamber (g sequence is to start the material or fluid by the lever arm 6 8. Spring-loaded valve 1 6 Two spring-loaded two valves are only being prepared (The metering, fuel moving program is preferably a workpiece, a construction tool, components and the lower chamber 5 6 3) (not shown). The tool touches its arched opening valve 1 8 open. This kind of stimulating fluid moves into the combustion hunting by any contact with the combustion chamber, and enters a path described in the workpiece described by -1 '丨 | _-recognition. __ · ιι… .. The best physical response of the sealed fluid when measuring the body is that the fluid has the same Figure 3A, which corresponds to the first figure in the preferred embodiment.

00517, ptd page 16 534963, fluid enters the metering chamber 24 freely. Then move along an arc defined by the arrow A (Figure 1) = move in the direction of the arch. In this way, the former will be released by the upward pressure of the first lever 34, so that the first seat portion 30 of the valve 16 is pushed into the metering chamber 24 and the valves 16 and 18 are moved into or out of the valve corresponding to the actuation. The inlet 2 0 and the outlet provide the arm 6 8 in the chamber as described above. When the second valve 1 8 is closed, the second valve 18 is released with the mallet bias and the fuel is released. The volume chamber is not leak-proof. The third position is closed and the second elasto-hydrodynamic system sequentially stops the fluid position from the metering arm 60 in two positions. Enter this

(V, elbow) V. Description of the invention (13) At this position, the pivot link arm 6 8 is moved, and the tenon 67 is opposite to the upper arm 6 2 applied to the spring 3 8 The first entrance 20 is associated with indulgence. Here, the two springs flowing from the fluid supply tank 28 are described in Fig. 3B and placed. The metering chamber 24 is late when the fluid is sealed therein and when the arc-shaped path defined by the pivot link is closed, the loose pair is sprayed on. As the loosely actuated upper part of the first valve 16 is moved to open the first part, it is ensured that the extra amount in the metering chamber 24 cannot enter the lower chamber 5 6 to prematurely bubble the actuator. 60 The first valve 16 has been completely closed. In this position, in this embodiment, as the sensors are all closed, the metering chamber 24 is prevented. This device assembly 60, the two openings 2 and 2 are closed to measure a volume of flow, which is generated by the arrow A (the opening of the tenon 69 and the notch 67), and the temporary link arm 6 8 moves, and There is a delay in the control arm 66. It will remain fixed and will occur when the outlet 2 2 is shown in Figure 3C. Its name spring-loaded valve 18 is opened after the i to 24 are released. In the comparative name from the first- Location, passage

00517.ptd Page 17 534963

The entire first valve stroke occurs. 5. Description of the invention (14) Second position, move to the third position. After the tool is started by the workpiece 60 from the third and second program by opening the inlet 2012, it can be used to start the second shown, the actuation 18 is released from the second valve 18, and the first is completely started. The second car starts from the connecting rod arm 6 8 two-position, the body to the measuring chamber 24 flows into the one-valve program, and starts to raise the position and warp downstream to restart again, but in this one program valve After the program passes the first and second spring adder assemblies 60, port 22, and the ground is closed, the pivot breaks the meter to make the first and second valve programs popular, but the Starting at the opposite third position, after the fluid has been metered, the actuation n? Can be moved to the brother one outlet 22, the measuring chamber 24. Before any of the same steps. The second bomb chamber 24 flows out of the assembly 60, where the actuator assembly is installed. This time and re-open the tool in the stimulus, all at once, move 1 to the 3C spring loaded valve. In this second position, as shown in Figure 3B. Here, the two valves 16 and 18 are closed to prevent the fluid from flowing back, and the metering chamber 24 contains only the amount of residual fluid. Finally, the first spring-loaded valve 16 is disengaged from the inlet 20, so that the fluid flows from the fluid supply 28 and flows freely into the metering chamber 24, but prevents the fluid from being supplied from the pressurized fluid supply 28 2. Pass the inlet 20 and the outlet 2 of the metering chamber 24 2. Freely flow to the combustion chamber passage 70. In the preferred embodiment, this operation or valve program is controlled by the pivotal actuation of the link arm 68, which actuates the actuating assembly 60, and is separated from the housing 12 by the upper arm 62. Position with a maximum interval (Figure 3A), move to a position where the lower arm 64 has a maximum interval (Figure 3C) from the housing 12

00517.ptd Page 18 534963 V. Description of the Invention (15). The butt engagement in the preferred action also operates between the valves 16. In any type of device or an electronic device, the actuator, the first lever 3, 4 has the openings 16, 6, 18 fixed to the levers 3, 34, 36, and is late. In addition to the notch 67 and the actuator assembly 60 also including the closure of one of the 18 and the other delay mechanism are appropriate, the mechanical delay mechanism. The most assembly 60 is slidably connected to a first opener 71 (opener), and the second rod 36 has a space between the second 71, 72, which is better and at the other valve 1 8 In the opening example of 16 and 16, in addition to the loosening of a delay mechanism between the tenons 69, the closing of a wide range of 18, 16 such as a mechanical delay mechanical lever 34, 36 with good electrical delay. Such as a C-clip, open 7 2. Used at the stem for a valve of uranium to produce a delay. In the preferred delay mechanism, the control 66 of the actuator assembly 60 is longer than the housing 12 in which the valve assembly is present. The excess length is sufficient for the upper arm 62 and the lower arm 64 to sandwich the casing 12 therebetween, and there is excess space between the outer arm and the actuating arm 6 2 and β 4. In response

When the stimulus of the valve program is issued, the control arm 66 moves up and down (as shown in Fig. 3: orientation, relative to the direction of the tool). Referring now to FIG. 3A, when the actuator assembly 60 moves past the first step, the upper arm 62 starts to contact the first opener 71. As the control '6 6 moves downward, the release or elongation of the first spring 38 supports the first opening Η against the upper arm 62 until the first seat 30 contacts the metering chamber = 忒 entrance 2 0, close the first-spring-loaded valve. Once the control arm 66 is fully moved, so that the upper arm 62 is disengaged from the first opener 71 (as shown in FIG. 3B), the first spring 38 will bias the valve 16 into the close

534963 V. Description of the invention (16) Location. During the movement of the control arm 66 from the first position (FIG. 3A) to the second position (FIG. 3B), the lower arm 64 has partially slid along the second lever 36, but not completely Press the second impeachment 40. Then, during the period when the control arm 66 is moved from the second position (FIG. 3B) to the third position (FIG. 2 of FIG. 2), “the lower arm 64 slides along the second lever 36 and finally contacts 2” to compress The second spring 40 opens the second spring-loaded second coil: the procedure of the first valve is similar to the above-mentioned steps, but the opposite, the seal is introduced between the closing of the second 8 and the opening of the first spring plus 16; Suitable for preventing the fluid from flowing into the room assembly 10, the amount of the opening to the opening 4, and the area outside the housing 12. This type of seal is accurate = true: the configuration depends on-the specific assembly in specific applications = = The preferred embodiment shown, when the rod is used through the external ground; when the device assembly is 6 °,-the removable insert 74 selects two Λ the individual spring load Ye defend 34, r 36. 0-ring 76, gasket two talents 34 in order to prevent leakage in the detachable insert is a better use. In some applications, the material bombards the heart Or the length of the rod, 36 through the upper chamber 54 or the lower chamber, in terms of length, the super is expected, the inch will be better These are also 78, its size and social use? The insert 74 includes-a hollow compartment, and accommodates the fixed end 42. + A through t 40 length of the supply of the input 74, or two ": The detachable plug-in part is easy to take from the Wuyu load valve 16 and 18 and its structure 00517.ptd on 534963 V. Description of the invention (17) " Figure 4, it is preferable that the valve assembly 10 is provided with a mechanism to promote the removal or discharge of fuel from the metering chamber 24 through the outlet 22, and finally enter the channel 70 leading to the combustion chamber. It has been found that when this type of combustion drive tool is operated at low temperatures, such as at 3 2 F 1 'the pressure of the fuel will decrease, and moving the fuel into the combustion chamber will be more difficult. For handling For this problem, the valve assembly 10 is preferably provided with a disk 80, which is fixed on the valve 18, and is particularly arranged at the end of the rod 36 in the measuring chamber 24. When the valve 18 is closed, the disc 80 is optimally positioned close to the inlet 20. For this purpose, the disc 80 is secured. It is fixed to a pedestai 82, which is sequentially fixed to the cone seat 32 °. In the preferred embodiment, the disc 80 is made of brass or equivalent rigid, heat-resistant material And the base 82 is made of rubber, or similar elastic polymer or plastic materials. However, other materials can also be considered. Preferably, the disc 80 is A frictional engagement with a projection 84 on the base and an axial hole 86 in the disc is a friction fit to the base 82. ~ However, 'other methods can be considered to fix the disc 80 to the base 8 2 including, but not limited to, ultrasonic welding, insert molding, inserting, or other methods. Mechanical fixings. The size of the disk 80 has a diameter which is approximately, but smaller than the diameter of the metering chamber 24. In operation, as the valve 18 is opened, as described above with reference to Figure 3C, the disc 80 follows the seat 32 from its rest position near the entrance 20 of the metering chamber 24. , (Can be clearly seen in Figure 4) move to the next

00517.ptd Page 21 534963 V. Description of the invention (18) Near one of the exits 24. Shibu poor ^ Ψ ^ 24 ^ μ i ^ ^ Private action will drive any remaining fuel, from 50 miles to 24, via the exit 22, and finally into the passage 70 leading to the chamber. In this way, Xi · says u and π fall to the heart. However, because of the low energy consumption ^ 1, the solution to mechanically change from the fuel chamber 24 will be provided-supplement: the relevant replacement mouth should be from this; the hot exhaust of the combustion chamber can be discharged through the thin force: Second: The same configuration is to provide a card-resistance heating element, or a configuration known by its dagger, which maintains the metering chamber 24 at a satisfactory temperature to maintain the fuel pressure. ， 2 " ι = "The production details show that the M system of the B10 and the fuel tank is sealed in the M system 的 'the sealing relationship between the valve 10 and the fuel tank 28 is established' To prevent fuel from burning. The fuel tank 28 is provided with an inner tube 9. , For the tank: ignite: define-export, as is known in the art: 5 35 蛰 中 所: is known 'and incorporated by reference in this case US Patent No. 5,1 1 5,944 For example, the tube 90 is fixed on a tube cap 92, and is surrounded by the tube cap 92. The tube cap 92 surrounds the end of the tank and forms a coiled connection thereon. Sew 9 4. An adapter 96 frictionally engages the tube cap 92 and surrounds and protects the protruding tube 90. An axial channel 98 is bounded by the adapter 96 and accommodates the officer 90. In the preferred embodiment, the adapter also includes a tipping film 100 ' that blocks the channel 98 and provides a visual indication of whether the tank 27 has been used. The configuration of the film 丨 〇〇 is punctured when mated with the joint 51. Therefore, the ruler made by the channel 98

00517.ptd Page 22 534963 V. Invention 1 Paste (! 9 ^ " " " 'Inch' is used to accommodate the joint 5 1. In addition, 'δ 亥 Connector 5 1 is preferably approximately the same in appearance Cylindrical, and two, diameter or cross-section parameters, whose dimensions are used for sliding and mating engagement: ° Hai channel 98, and a length, which is used to engage one end of the tube 90 for the tank 28 and the The transmission of fluid between the valves 丨 〇. In the ^ κ known example, the joint 51 is cylindrical, but its non-circular cross-sectional profile can also be considered, depending on the application, including ellipse Shape, square, rectangular, and polygonal shape. In the preferred embodiment, the structure of the joint 51 and the tube 90 is such that a seal can be achieved in the operation engagement shown in Figure 5 These two relations are designed to prevent unnecessary loss of fuel, and can be connected by friction between the end 102 of the tube 90 and one end 104 of the joint 51 ^: better: It is a type of sealing structure provided to at least one of the lean seal and 90 °. In this In a preferred embodiment, the seal formation system is an elastic O-ring, which is provided to the joint 51. In the absence of L, it can be considered that it is a known type of sealing structure, including but not limited to a ring; , Molded seals, and flat washers. Also, the joint end 104 defines a chamber 108 for receiving or housing a member, such as the 0-ring 106. In more detail, the end is tapered or chamfered. (Chamfered), used to hold the O-ring 106, and also used to urge the connector 51 into the adapter channel M. The tapered end 104 can pierce the film more easily. The total number, and / eight are also], a inch, especially when the joint 5 1 is even made of%, such as brass, which is a better amount of other appropriate rigid and durable materials. ,,,,,,, , ', Η test

Page 23 334963 V. Description of the invention (20) system, the connector 51 of the "ic" and the sealing ring 10 / \ ^ of the tube 90 and the structure of 102 are used to matingly engage or accommodate the 0-shaped f The end 102 is preferably provided with a —annular groove 1Π). When changing ground, the O-ring 106 or other elastic sealing member can replace the figure: in the tube 90, or it can be used in the-groove (Not shown in the figure), or other known types of 0 installed on the end of the connector ΐθ4. Clothing and clothing technology, add

The tank 28 is fluidly connected to two: the head and: ==. At the end, if necessary, and -fluid II V is in use, the tank 28 is inserted into the combustion tool, so that continued, the head 5 = ground to engage the adapter 96. The tank is attached to the joint ", so that the film 100 is pierced, and the end of the joint 104 enters the transport M until it comes into contact with the end of the tube 102. As mentioned above, when it is preferred When a sealed relationship is obtained, it is also possible to consider using other locks to fix the tank 28 in this position, so those skilled in the art will understand that the valve, assembly and metering changer provide a simple Method for supplying a fixed volume of fluid to a power fixed tool. The two spring-loaded valves 16, 18 control the inlet and the outlet of the fixed volume metering chamber 24 to determine a fixed amount of fluid, and do not The fluid flow rate is dependent. The actuator assembly 60 controls the opening and closing of the valves 16 and 18, receives the fluid originating from the pressurized source 28, and is on the side " L 体 顺 々 丨L 〃 丨 L measures it before it reaches a combustion or expansion chamber. The valve

Ik

00517.ptd Page 24 534963 V. Description of the invention (21) "This configuration of 8 will minimize the wear of the seal and reduce maintenance warranty. Now referring to Figure 6, one of our assembly replaces § tolerance. In the main difference between δHai assembly 10 and 120, the system includes-the mechanism 'to change the fuel quantity chamber ;,' §Hai? 120% The user can selectively adjust the volume of the fuel from the two: This adjustability is particularly useful when the tool makes the air at the burner thinner and more efficient. And the 枓 of 枓 is less day-to-day, in this preferred embodiment, it is used to change the body — a dose plunger (d. Sage ρ ung…… to the body and the mechanism is an elongated member, oriented The “relative denier” is referred to herein as a plunger, and its movement. Preferably, the plunger is moved back and forth in a straight line from one to 24. The plunger 122 can be considered and -t »/. The other part will be accounted for by the fuel. In the space, the space is a slender metal shaft. In the 2 Jiaguan embodiment, the plunger ⑴ ⑵. As described previously, the 1 wide end 124 and the adjustment end of the amount of the The structure of the work ^ ρ ^ knowledge 24 is used to reduce the volume of the measuring chamber 24 by individually launching a few tools that occupy a few miles. The space occupied by such a wide space, and the descending system is roughly cylindrical, with a cutoff. 7 一 u, the child valve end 124 is changed in shape to have a shape complementary to that of the measuring chamber 2: the upper end and the end, and the end can also consider the wall 128. The line crosses the valve 16 '18 Defined—the operating shaft is counterclockwise and the money shaft is approximately 00517.ptd Page 25 534963 V. Description of the invention (22) Relative to the valve end 1 2 4 and the adjustment end 1 2 6 The structure is used for selective manipulation, here is the axial rotation, which in the preferred embodiment is achieved by a screwdriver slot 1 30. The shape of any conventional drive slot (dr slot) is Deemed suitable, including but not limited to grooved, Phillips, Tori, etc., and hexagonal for an Allenwrench or a conventional socket (S0Cket) For applications where only certain qualified service personnel are allowed to adjust the tool, a custom adjustment structure can also be considered. Between 5Hai valve 1 2 4 and the adjustment end 1 2 6, the The plunger 1 2 2 is preferably provided with threads, so that the axial reciprocating movement of the valve end 1 2 4 in and out of the metering chamber 24 can be completely controlled. Any equivalent structure for achieving this goal, Both can be considered. In addition, the plunger 22 is provided with a sufficient length so that it can be adjusted outside the valve housing 12. _ The structure of a sleeve (s 1 e ev e) 1 3 2 is used Installed in an operational relationship to "the valve housing 12 and reciprocally accommodates the plunger 22. More details In particular, the sleeve 1 3 2 surrounds and thus supports the plunger 丨 2 2 and is preferably fixed to the housing 12 by press-fitting into a hole 134. The hole 134 is connected to the metering chamber 24 The dagger method used to fix the sleeve 1 3 2 to the casing 12 is considered, including welding, chemical adhesive, etc. The sleeve 3 2 is provided with a central, axial penetration The hole 136 communicates with the measuring chamber 24 and is sized to receive the plunger 22. To fully support the plunger 122, the sleeve 1 3 2 has a sufficient length, which is as large as orthogonal to the The housing 丨 2 is extended. However, the plunger 122 is preferably longer than the sleeve 132. One of the outer ends 1 3 8 of the sleeve 32 is preferably engraved with threads 4 4 to engage the threads of the plunger 22 2. The

00517.ptd Page 26 534963 V. Description of the invention (23) ^ The specific position of the corresponding threaded part of the plug 122 and the sleeve 132 can be changed according to the application. Because the hole 134 "and the through hole 136 are difficult to communicate with the metering chamber, it is important to seal them to prevent unnecessary leakage of fuel. Therefore, the sleeve 132 is preferably provided with a seal 142, which is arranged in a 0-ring groove 144 of a proper size in the form of a 10 ring. Depending on the application 2, the groove 144 may be placed on the sleeve 132 or in the hole 34. The 2'-plunger seal 146, which is also preferably an O-ring, closes the through-hole and is arranged in a groove 148, which is located in the through-hole 136 or the plunger for the operation of the valves 16, 18 Without being damaged, it is preferable that the plunger 12 is disposed in the measuring chamber at an offset position. In other words, the vertical axis of Bianzhuyi & 2 is offset from the vertical plane where ‘metering; 24 $ is divided into two in the direction of the plunger's reciprocating movement. In practice, and referring now to FIG. 6, the plunger 122 is disposed behind the moving shafts of the valves 16, 18. > 1¾¾ "Now referring to Fig. 7, another feature of this system 120 is that when the combustion pressure is reduced as previously described, the plunger 22 or the sleeve 1 3, 2 can be heated, so that the The tool can be used at a relatively low temperature (32 ° F). By connecting the current-conducting wire 150, the tool's battery (not shown) is used to provide energy, and the heat can be provided by electricity. / Or, Instead of the plunger 122, a fixed heating element 152 can also be used to provide heat. The heating element 152 can move back and forth in the sleeve 132 by friction fit, and can also be connected to the battery, such as this technology; It is widely known. As mentioned above, regarding this supplementary discharge passage 8 8 (No. 4

00517.ptd Page 27 534963 V. Description of Invention (24) Figure), additional heat can be provided from this combustion chamber. Although a specific embodiment of the fixed volume valve assembly and metering chamber has been shown and described, those skilled in the art will appreciate that these embodiments can be changed or modified without departing from the broader perspective of the invention , And those covered by the scope of patent applications below.

00517.ptd Page 28 534963 Brief description of the drawings [Illustration] Figure 1 is a rear view of a fixed volume valve assembly added to a fuel tank. Fig. 2 is a front vertical sectional view of a fixed volume valve assembly. Figures 3 A-3 C are fragmentary cross-sectional views of a series of fixed volume valve assemblies, depicting the three valve positions as the activation assembly moves through a series of operations. Figure 4 is a fragmentary sectional view of the fixed volume valve assembly shown, showing that it is equipped with a disc to facilitate the movement of fuel from the metering chamber into the combustion chamber. FIG. 5 t k is a fragmentary cross-sectional view of an alternative embodiment of a fixed volume valve assembly showing the sealed connection between the valve and the internal nozzle of a pressurized fuel cartridge. Fig. 6 is a partial cross-sectional view taken along line 6-6 of Fig. 4 and substantially in the direction indicated, and depicts an alternative embodiment of the valve assembly. Fig. 7 is an alternative embodiment of the valve assembly depicted in Fig. 6, wherein the quantitative adjustment shaft system is replaced by a heating element.

00517.ptd Page 29 534963

Brief description of the drawing [Description of the number] 10 valve assembly 12 housing 16 valve 18 valve 20 inlet D 22 outlet 24 metering chamber 28 tank 30 seat 32 seat 32 rod 36 rod 38 spring 40 spring 42 fixed end 44 fixed end 48 Moving end 46 Moving end 50 Filter 51 Joint 52 Upper passage 54 Upper chamber 56 Lower chamber 60 Actuator assembly 62 Upper arm 64 Lower arm 66 Control arm 67 Concave D 6 8a point 68 Link arm 69 Tongue 70 Channel 71 First opener 72 Second opener 74 Insert 76 O-ring 78 Compartment 80 Disc 82 Base 84 Protrusion 86 Hole 88 Discharge channel 90 tube 92 tube cap 94 seam 96 adapter 98 channel 100 membrane 102 end 104 end 106 0 ring 108 chamber 110 groove 120 valve assembly 122 plunger 124 valve end 126 adjusting end 128 wall 130 screwdriver slot 132 sleeve 134 hole 136 hole 138 outer end 140 thread

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00517.ptd Page 31

Claims (1)

534963 _Case No. 91109520_Year Month Date__ VI. Patent application scope The closed valve system is closed and the second spring-loaded valve system is open, in the second position, both the first and second spring-loaded valves are closed, and In the third position, the first impulse-loaded valve system is opened and the second spring-loaded valve system is closed, so that for each sequential movement of the actuator from the third position to the first position, in One volume of the fluid in the third position is released by the metering chamber to provide a fixed volume of fluid, the metering chamber is sealed in the second position to prevent the fluid from flowing back, and the metering chamber is in the first position Refill one volume of fluid. 3. The fixed-volume metering chamber and valve assembly according to item 1 of the scope of the patent application, wherein the structure and configuration of the metering chamber are such that the volume of the collected fluid is dedicated to the volume of the fluid released from the weighing chamber . 4. A fixed-volume metering chamber and valve assembly according to item 1 of the scope of the patent application, wherein the metering chamber is provided with a device to facilitate the discharge of fuel from the chamber. 5. The fixed-volume metering chamber and valve assembly according to item 1 of the scope of the patent application, and additionally including a delay mechanism, the structure of which is used to close and close one of the first or second spring-loaded valves. There is a delay between the opening of the other of the first or second spring-loaded valves. 6. The fixed-volume metering chamber and valve assembly according to item 5 of the scope of the patent application, wherein each of the first and second spring-loaded valves includes a bias 00517.ptc Page 33 534963 _Case No. 91109520_Amendment of the month of the year_ 6. Patent application lever (biasedr 〇d), and the actuator assembly is slidably connected between the casing and an opener To each of the rods, the opening is located on the rod, so as the actuator assembly slides between the opening of one of the spring-loaded valves and the opening of the other of the spring-loaded valves. , This delay occurs. 7. The fixed-volume metering chamber and valve assembly according to item 6 of the scope of the patent application, wherein the actuator assembly includes a control arm whose structure is used to actuate the first and second spring-loaded valves, And a pivot link arm (piv 0ting 1 i η karm), the structure is used to engage the control arm to generate the actuation, the structure of the arm has a loose mating engagement to generate the delay. 8. The fixed-volume metering chamber and valve assembly according to item 1 of the scope of the patent application, in addition to a device for adjusting the internal volume of the metering chamber. 9. The fixed-volume metering chamber and valve assembly according to item 8 of the scope of the patent application, wherein the device for adjustment includes a plunger whose structure is used to adjust the reciprocating motion relative to the metering chamber. 10. The fixed-volume metering chamber and valve assembly described in item 1 of the scope of the patent application, including a heater, is provided in the casing in an operational relationship to heat the metering chamber. 11 · A variable volume metering chamber and valve assembly for a combustion drive 00517.ptc Page 34 534963 00517.ptc Page 35