US3213607A - Impact tool - Google Patents

Impact tool Download PDF

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Publication number
US3213607A
US3213607A US292701A US29270163A US3213607A US 3213607 A US3213607 A US 3213607A US 292701 A US292701 A US 292701A US 29270163 A US29270163 A US 29270163A US 3213607 A US3213607 A US 3213607A
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United States
Prior art keywords
cylinder
valve
piston
valve member
tubular
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US292701A
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English (en)
Inventor
Neumeier Albert
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Omark Industries Inc
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Omark Industries Inc
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Publication date
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Priority to US292701A priority Critical patent/US3213607A/en
Priority to DEO10225A priority patent/DE1284368B/de
Priority to FR980497A priority patent/FR1407893A/fr
Priority to GB27573/64A priority patent/GB1070787A/en
Application granted granted Critical
Publication of US3213607A publication Critical patent/US3213607A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/06—Means for driving the impulse member
    • B25D9/10—Means for driving the impulse member comprising a built-in internal-combustion engine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/0085—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for explosive-powered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/08—Hand-held nailing tools; Nail feeding devices operated by combustion pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B71/00—Free-piston engines; Engines without rotary main shaft
    • F02B71/04—Adaptations of such engines for special use; Combinations of such engines with apparatus driven thereby

Definitions

  • NEUMEIER Oct. 26, 1965 IMPACT TOOL 7 Sheets-Sheet 1 Filed July 5, 1963 INVENTOR.
  • A. NEUMEIER Oct. 26, 1965 IMPACT TOOL '7 Sheets-Sheet 2 Filed July 5, 1963 INVENTOR.
  • This invention relates to an impact tool and more particularly to a tool actuated by explosion of a fuel-air mixture driving a piston.
  • An object of the invention is to provide an impact tool in which a precisely measured amount of fuel is introduced into the tool for each operation thereof.
  • a further object of the invention is to provide a new and improved fuel supply for an impact tool.
  • Still another object of the invention is to provide an impact tool in which a metering chamber filled with a high vapor pressure fuel is opened to a cylinder at a predetermined point in the movement of a piston in the cylinder.
  • the present invention provides an impact tool in which a main piston is movable between one end of the cylinder and the other end of the cylinder, together with an auxiliary piston movable after a manual triggering operation from a retracted or cocked position to an extended position moving the main piston to an intermediate position between the ends to draw air into the interior of the cylinder.
  • a first valve between a metering chamber and a supply of liquid fuel under pressure is closed and a second valve between the metering chamber and the cylinder is opened so that fuel in the metering chamber will flow through the second valve into the interior of the cylinder.
  • the fuelair mixture in the cylinder is ignited to drive the main piston on in a power stroke.
  • the second valve is closed and the first valve remains closed until the auxiliary piston is cocked at the end of the explosion.
  • the first valve is opened to refill the metering chamber with fuel.
  • the first valve is a check valve at one end of the metering chamber
  • the second valve is a tubular valve member urged toward the first valve member with a force sufficient to seal the end of the tubular valve member but not suificient to move the first valve member away from a position closing the metering chamber from the fuel container.
  • the explosion of the fuel-air mixture drives the auxiliary piston back to its retracted position, in which position the auxiliary piston is latched.
  • FIG. 1 is a fragmentary, partially sectional view of an impact tool forming one embodiment of the invention
  • FIG. 2 is a vertical sectional view taken generally along line 22 of FIG. 1;
  • FIG. 3 is an enlarged, partially sectional view taken generally along line 3-3 of FIG. 2;
  • FIG. 4 is a fragmentary, partially sectional view generally similar to FIG. 3;
  • FIG. 5 is an enlarged, fragmentary, partially sectional view similar to FIG. 3 with parts thereof shown in different positions from those in Which they are shown in FIG. 3;
  • FIG. 6 is a fragmentary, partially sectional view taken generally along line 66 of FIG. 4;
  • FIG. 7 is a view generally similar to FIG. 5 but with the parts thereof in different positions from those in which the parts are shown in FIG. 5;
  • FIG. 8 is a view similar to FIG. 6 with the parts thereof shown in positions corresponding to those of FIG. 7;
  • FIG. 9 is a vertical sectional view similar to FIG. 8 and illustrating a manual cocking mechanism of the impact tool of FIG. 1;
  • FIG. 10 is an enlarged vertical sectional view taken along line 1010 of FIG. 7;
  • FIG. 11 is an enlarged vertical sectional view taken along line 1111 of FIG. 1);
  • FIG. 12 is an enlarged vertical sectional view showing a trigger mechanism and a magneto mechanism of the impact tool of FIG. 1;
  • FIG. 13 is a view similar to FIG. 12 but with the parts thereof in different positions;
  • FIG. 14 is a schematic view of an ignition system of the impact tool of FIG. 1.
  • an impact tool forming one embodiment of the invention includes a rear casting 20 (FIG. 1), a cast cylinder head 22 and a trigger housing 38 all secured together.
  • An auxiliary piston or plunger 21 is movable from a retracted position in the cylinder head 22 for a cylinder 23 toward the right, as viewed in FIG. 1, by a compression spring 24 to move a main piston 25 from a normal position thereof adjacent the head 22 to an intermediate or firing position thereof spaced substantially from both ends of the cylinder 23.
  • a compression spring 24 As the auxiliary piston 21 so moves, it moves against a compression spring 31 which is weaker than the compression spring 24 and draws air into the portion of the cylinder 23 therebehind through a port 32 (FIG.
  • a driving rod 35 (FIG. 3) to the right, as viewed in FIG. 3, first to the position thereof shown in FIG. 5 and then releases the driving rod 35, which is moved back to the position thereof shown in FIG. 7.
  • the position of the driving rod shown in FIG. 7 is intermediate the positions thereof shown in FIGS. 3 and 5.
  • the rod 35 controls the supply of a fuel under pressure to the interior of the cylinder 23.
  • the rod 35 has a lateral driven arm or dog 41 rigid thereon and a second rigid driving arm or dog 42 projecting into a grooved collar 43 rigidly fixed to a tubular valve member 44.
  • the impact tool includes a piston rod 26 slidable in cylinder head 27 and in barrel 36 for driving a fastener or stud (not shown) positioned in the barrel 36 as is well known in the art.
  • Cap screws 28 secure the heads 27 and '22 together.
  • a cushion 30 at the end of a guide sleeve 29 in the cylinder head 27 acts as a bumper for the main :piston 25.
  • Cap screws '37 secure trigger housing 38 to the cylinder head 222.
  • the trigger housing has a handle 39, and carries a trigger 40.
  • a spark plug 46 (FIGS. '2 and 14) provides ignition from a magneto ignition mechanism 47, and a trigger mechanism 48 (FIGS. 12 and 13) is provided.
  • the tubular valve member 44 as best shown in FIG. 7,
  • valve member 44 has an axial passage extending therethrough and the righthand end of the valve member 44 is guided by bushing 72 and is slidable in a bore '51 of a nozzle member 52 having a nozzle orifice 53.
  • the nozzle member 52 is threaded into .a tapped bore 54 in a headed, tubular insert 55 fixed in .a complementary recess or passage 56 in the cylinder head 22.
  • the tubular valve member 44 is also slidable in a bronze, flanged bushing 61 and a seal 62 of poly-tetnafluoroethylene.
  • the bushing 61 and the seal 62 are secured between generally tubular members 63 and 64 secured to the headed insert 55 in alignment therewith by ca-pscrews 65.
  • Oapscrews 66 threaded into the cylinder head 2 2 secure the assembly of the threaded insert 55 and the members 63 and 64 rigidly in position in the counterbored recess or passage 56.
  • a compression spring 71 seats against a bronze flanged bushing 72 held by the nozzle member 52 in a counteribored recess 73 in the insert 55 and at its other end engages the collar 43 to urge the tubular valve member 44 to the left, as viewed in FIG. 7.
  • the insert 75 is seated in a socket 77 in a valve member 78.
  • the valve member 78 is urged toward the right by a compression spring 83, as viewed in FIG.
  • the valve member 78 has a bore 91 therein which is opened at the 'lefthand end thereof, .as viewed in FIG. 7, and is closed at the righthand end, with a transverse passage 92 connecting the righthand end portion of the bore :91 to the outer periphery of the valve member 78.
  • Fitting closely and slidably in the bore 91 is a cylindrical guide rod or post 93 integral with the plug 84, and this mounts the valve member 7 8 slidably along the longitudinal axis of the insert 55.
  • the plug 84 is provided with passages 94 therethrough, which connect a counterbore 95 in a connector bushing 96 of a cartridge or container 97 to the interior of the sleeve 87.
  • the plug 84 has a cylindrical portion 101 projecting through a grooved bushing 102 fixed in the open end of the counterbore 95 of the connector bushing 96.
  • the bushing 102 carries an O-ring 103 which sealingly engages the cylindrical portion 101.
  • Interiorly tapped nose portion 104 of the member 63 is adapted to receive the threaded bushing 96 and to engage a gasket 104 and press the gasket 105 against a flange 106 of the bushing 96 to seal the end of the bushing 96 in the member 63.
  • the cylindrical portion 101 of the plug 84 has a socket 111 for receiving a spring-pressed valve member 112 of the cartridge 97, and moving the valve member 112 to a position opening a resilient, rubber bag or bladder 113 to the counterbore 95 and passages 94 in the plug 84.
  • the valve member 112 has a head 114 and normally is urged to the right to close a valve passage in member 115 by a spring (not shown) in tube 116, but when the connector bushing 96 is threaded into the nose portion 104 of the member 63, the valve member 112 is held stationary while the member 115 is moved to the right to open the passage in the member 115.
  • the tube 116 connects the member 1 15 to the interior of the bag 113.
  • valve member 44 moves the valve member 44 back to its closed position shown, in FIG. 7, in which the lefthand end of the valve member 44 sealingly engages the valve insert 75, after which the ignition of the air-fuel mixture takes place.
  • the metering chamber 131 is closed off from the combustion chamber.
  • the orifice 53 is so small and the interior of the bore 51 and the passage 45 are filled with the fuel, probably in the vapor form, and have no air therein so that combustion stops at the exit end of the orifice 53.
  • the orifice 53 also is so small that the increased pressure occurring during the explosion of the fuel-air mixture and the duration of the explosion is so short that the pressure in the passage 45 is not increased sufliciently to move the valve member 78 against the action of the spring 83.
  • the auxiliary piston 21 (FIG. 1) is slidable in a bore 141 in a bushing 142 positioned in a bore and threaded into a tapped bore 143 formed in the cylinder head 22, and is movable between a cocked or retracted position thereof, as illustrated in FIG. 9, through an intermediate position thereof, as shown in FIG. 6, to an extended position thereof shown in FIG. 8.
  • a cocked or retracted position thereof as illustrated in FIG. 9, through an intermediate position thereof, as shown in FIG. 6, to an extended position thereof shown in FIG. 8.
  • a flange 144 thereof engages a slotted lever 145 pivoted on pin 146 carried by a bushing 147 fixed in a laterally opening slot 148 in the cylinder head 22 and holds the lever 145 in a position engaging the collar 151 to hold the collar 151 and rod 152 against the action of compression spring 153 in extreme lefthand positions of the collar 151 and rod 152.
  • a plug 154 threaded into a tapped counterbore 155 in the head 22 seats the lefthand end of the spring 153.
  • the rod 152 carries a slide portion 161 having a slot 162 through which projects an arm 163 of a lever 160 having a second arm 164 and mounted pivotally on a pill 165 carried by the slide 161.
  • the trigger mechanism 48 (FIGS. to 13) includes the trigger 40 mounted pivotally on pin 181 and having a clevis 182 connected by a pin 183 to a link 184.
  • the pin 181 is mounted in a fixed position on trigger side plate 175 fixed in the trigger housing 38.
  • a magneto driving lever 185 also is mounted pivotally on the pin 181 and has a socket 186 in one arm thereof in which is seated a compression spring 187 which also fits over spring seating pin 188 fixed to the trigger 40.
  • the lever 185 carries a hook member 189 on the other end thereof and is adapted to be held in latched position by a latching lever 190 pivoted on a pin 191 fixed to the trigger side plate 174 and having a latching hook 192 adapted to hook over a laterally projecting lug 193.
  • a tension spring 194 urges the lever 190 in a counterclockwise direction, as viewed in FIGS. 12 and 13.
  • the trigger 40 is pivoted in a clockwise direction, as viewed in FIGS. 12 and 13, to fire the tool, it moves the link 184 upwardly to the left, as guided by a cam slot 201 and a pin 202 fixed to the trigger side plate 175.
  • the link 184 carries thereon a lever dog 203 pivoted on pin 204 and urged clockwise by a spring 205 (FIG. 12) toward a position in which the lower arm thereof abuts against the link 184.
  • the dog 203 engages an arm 211 of a sear 212 pivoted on pin 213 fixed to the plate 175, and pivots the sear 212 against the action of a compression spring 214 to move a catch 215 out of latching engagement with the flange 144 of the auxiliary piston 21 to permit the auxiliary piston 21 to be driven by the spring 24 (FIG. 1) to the right in its work stroke from its retracted or cocked position.
  • the auxiliary piston in its work stroke moves the main piston 25 away from the cylinder head 22 to draw air into the cylinder 23, actuates the tubular valve member 44, as described above, to supply a measured quantity of fuel to the interior of the cylinder through the orifice 53 (FIGS. 2 and 7, and then releases the valve member 44 to permit it to return to the position thereof shown in FIG. 7 prior to the end of this pre-ignition movement of the pistons 21 and 25 (FIG. 1).
  • the auxiliary piston 21 is released to make its work stroke by pivoting of the sear 212 (FIGS. 12 and 13), the flange 144 of the piston 21 moves into engagement with an arm 221 (FIG.
  • the lever 185 engages the end of high reluctance rod 231 mounted slidably in slot 232 of a core 229 of the magneto 47, and moves a low reluctance member 234 away from a core portion 235 of the magneto, the low reluctance member 234 being slidable in slot 233 in the core 229.
  • a plate 249 is fixed to the core 229, and acts to stop the member 234 in its travel to the right. The movement of the low reluctance member 234 creates a gap 219 (FIG.
  • the magneto has a permanent magnet 242 and core portions 243 and 244 of low reluctance, the core 229 being mounted on members 245 and 246 of rubber or other insulation andfixed to the trigger housing 38 by screws (not shown), a high reluctance member 247 being positioned between the sheets 245 and 246.
  • Capacitor 251 is connected across the breaker points to prevent burning of such points.
  • the low reluctance member 234 engages the core member 235 to again increase the flux in the core 229, and the latching lever again swings back under the lug 193 of the lever 185 to latch the lever 185 into position. Also, the dog 203 again swings under the arm 311 of the sear 212 as illustrated in FIG. 12.
  • the above described apparatus gives a sure, uniform charge of fuel to the cylinder 23 for each firing thereof and directs the fuel in a wide spray through the arcuate orifice 53 away from the spark plug 46, as illustrated in FIG. 2, and toward the port 32 through which the air is being drawn into the cylinder by the piston.
  • This causes the fuel and the air to mix thoroughly as the air is introduced into the cylinder 23, and forms an ideal, uniform combustion mixture for each actuation of the impact tool.
  • the ignition mechanism (FIGS. 12, 13 and 14) provides a hot spark precisely timed in the cycle to surely ignite the fuel-air mixture on each operation.
  • first valve means responsive to actuation of the cocking means for connecting the metering chamber to the fuel supply chamber
  • trigger actuated means for actuating the firing mechanism
  • a first valve member in the first tubular means slidable along the tubular member between a closed position closing the supply container from the interior of the first tubular means and an open position permitting flow of fuel from the container into the first tubular means
  • an actuator connected to the tubular valve member for moving the tubular valve member along the tubular metering means to move the first valve member to the open position thereof While maintaining said one end of the tubular valve member closed and also movable in a second direction to move the tubular valve member away from the first valve member to open said one end of the second valve member and permit fuel in the metering chamber to flow through the first valve member into the combustion chamber.
  • a cylinder having a forward end and a rear end
  • air inlet valve means positioned near the rear end of the cylinder adapted to supply 'air into the cylinder behind the main piston as the main piston moves from its position near the rear end of the cylinder to its intermediate position
  • first valve means for connecting the fuel supply means to the metering chamber
  • actuator means operable by the auxiliary piston for sequentially closing the first valve means, opening the second valve means, and closing the second valve means as the main piston is moved from the normal position thereof .to the intermediate position thereof.
  • a cylinder having a forward end and a rear end
  • air inlet valve means positioned near the rear end of the cylinder adapted to supply air into the portion of the cylinder behind the main piston as the main piston moves from the normal position of the cylinder near the rear end of the cylinder to the intermediate position thereof,
  • a tubular guide member mounted on the rear end of the cylinder and having an opening communicating with the interior of the cylinder
  • tubular valve member having a passage extending longitudinally therethrough and slidably mounted in the bushing member
  • a tubular metering chamber aligned with the guide member and having openings at the ends thereof, guide means mounted in one of the metering chamber and fitting around the tubular valve member and permitting longitudinal movement of the valve member While sealing the valve member,
  • valve seat member positioned at the other end of the metering chamber
  • a second valve member mounted slidably in alignment with the tubular valve member
  • the second valve member also being provided with a valve seat portion adapted to be engaged by and seal off the end of the tubular valve member When the tubular valve member is pressed thereagainst,
  • first valve means connecting the fuel supply and metering chambers
  • piston means movable in the combustion chamber between a cocked position and an actuated position
  • first valve means connecting the fuel supply and the metering chambers
  • tubular valve means connecting the metering and combustion chambers and extending slidably into the metering chamber
  • piston means movable in the combustion chamber between a cocked position and an actuated position
  • first means urging the piston toward one end of the cylinder
  • locking means for locking the second means in inactive position to enable the first means to move the piston to said end
  • first means urging the piston toward one end of the cylinder
  • locking means for locking thev second means in inactive position to enable the first means to move the piston to said end
  • a metering chamber having an inlet and an outlet aligned with the inlet
  • tubular nozzle means open at one end to the explosion chamber
  • valve member urged against the inlet to close the inlet
  • triggerable means for moving the piston from the retracted position thereof to an intermediate position in which the piston is spaced substantial distances from both ends of the cylinder
  • check valve means for supplying air to the cylinder as the piston is moved from the retracted position thereof to the intermediate position thereof
  • a metering chamber of predetermined volume having an inlet and an outlet aligned with the inlet
  • a cylinder having a head provided with an air inlet port
  • the cylinder head having a first bore extending therethrough parallel to the longitudinal axis of the cylinder
  • the cylinder head also having a second bore therein parallel to the first bore
  • first means urging the piston toward a retracted position at the cylinder head end of the cylinder
  • triggerable plunger means movable in the second bore from a cocked position for moving the piston against the action of the first means from the retracted position thereof to an intermediate position in the cylinder to provide an explosion chamber
  • manually controlled trigger means for triggering the triggerable plunger means to move the piston to the intermediate position thereof
  • valve body mounted in the first bore having an axial passage extending therethrough
  • a fuel cartridge containing a volatile liquid therein secured to the valve body at an outer end of the axial passage and having a valve in communication with the axial passage
  • valve plunger in a fixed position in the axial passage such as to hold the valve open to the passage
  • first valve member having a valve head at one end thereof and an axial bore opening at the other end thereof and slidable on the plunger
  • the first valve member also having an opening extending from the axial bore in the valve member to the exterior of the valve member
  • the relative sizes of the exterior of the valve member and the axial passage in the valve body being such as to provide a passage therebetween
  • a first compression spring of a predetermined strength urging the valve member toward a closed position away from the fuel cartridge in which the valve head engages the valve seat
  • valve head having a socket opening away from the cartridge
  • a nozzle member fixed in the axial bore in the valve member at the end thereof adjacent the interior of the cylinder having a bore therethrough axially aligned wtih the bore in the valve member and also provided with an orifice extending from the bore in the nozzle member to the interior of the cylinder,
  • tubular valve member having one end portion fitting closely and slidably in the bore in the nozzle member and a second end portion adapted to sealingly engage the valve seat member in the socket when pressed thereagainst
  • a second compression spring substantially weaker than the first compression spring and normally urging the tubular valve member into engagement with the valve seat member
  • annular guide positioned in the axial passage in the valve body between the socket and the nozzle member and serving to guide the tubular valve member and sealingly engage the tubular valve member and the bore in the valve ,body to define a metering chamber with the valve head, the exterior of the tubular valve member and the interior of the axial passage in the valve body,
  • a first rod mounted for slidable movement parallel to the axial passage in the valve body and connected to the tubular valve member and having a laterally projecting dog
  • a second rod having a fixed lateral abutment member for engaging the dog on one side thereof and moving the rod in a direction away from the interior of the cylinder
  • a flange on the plunger means for engaging the lever to move it to the second position thereof at the extreme end of the movement of the plunger into the cylinder
  • lost motion means operable by the plunger means for moving the second rod in a direction away from the interior of the cylinder during the latter portion of the movement of the plunger means toward the cocked position thereof and for holding the second rod against the action of the spring means in a position holding the first rod in position holding the tubular valve member against the valve seat member and the head of the valve member away from the valve seat.
  • first means urging the piston toward one end of the cylinder
  • locking means for locking the second means in inactive position to enable the first means to move the piston to said end
  • a tubular metering chamber having a predetermined inner diameter and valve seat means at one end thereof communicating with the container
  • annular guide member having an inner diameter substantially less than that of the metering chamber closing the other end of the metering chamber
  • valve member having a head urged toward the valve seat to close the metering chamber from the container
  • a tubular nozzle member slidable in the guide member and adapted to sealingly engage the head and movable away from the head to permit liquid in the metering chamber to flow into and through the nozzle member
  • first means urging the piston toward one end of the cylinder
  • an auxiliary piston for moving the main piston against the action of the first means to an intermediate position in the cylinder to provide an explosion chamber
  • locking means for locking the auxiliary piston in inactive position to enable the first means to move the main piston to said end
  • tubular metering chamber having a predetermined inner diameter and a valve seat at one end thereof communicating with the container
  • annular guide member having an inner diameter substantially less than that of the metering chamber closing the other end of the metering chamber
  • valve member having a head urged toward the valve seat to close the metering chamber from the container
  • a tubular nozzle member slidable in the guide member and adapted to sealingly engage the head and movable away from the head of the valve member to permit liquid in the metering chamber to flow into and through the nozzle member,
  • auxiliary piston operable by the auxiliary piston for holding the tubular nozzle member in a position holding the head of the valve member away from the valve seat while the second means is in its inactive position and for moving the tubular nozzle member away from the head to permit the head to seat against the valve seat and to open the interior of the tubular nozzle member to the interior of the chamber as the auxiliary piston moves the main piston to the intermediate position thereof and for releasing the tubular nozzle member to move back against the head before the main piston reaches the intermediate position thereof,
  • a cylinder head having an axial bore therein and also being provided with a passage therethrough parallel to the bore and a socket at the rear end of the passage,
  • valve means in the passage for opening the passage for flow of fuel from the container to the cylinder
  • auxiliary piston slidable in the axial bore in the cylinder head for moving the main piston from a position adjacent the cylinder head to a position intermediate the ends of the cylinder
  • auxiliary piston operable by the auxiliary piston for controlling the valve means to supply fuel from the passage to the cylinder as the main piston is moved to the position thereof intermediate the ends of the cylinder.
  • a fuel container having an outlet and containing fuel under pressure
  • elongated tubular housing means having an inlet end in communication with the outlet of the container and also having an outlet end,
  • a first valve closure member mounted in the tubular housing means between the outlet of the container and the first valve seat and urged by the fuel toward closing engagement with the first valve seat member
  • metering chamber means including a portion of the interior of the tubular housing means defining a metering chamber between the first valve seat member and the second valve seat member,

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US292701A 1963-07-03 1963-07-03 Impact tool Expired - Lifetime US3213607A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US292701A US3213607A (en) 1963-07-03 1963-07-03 Impact tool
DEO10225A DE1284368B (de) 1963-07-03 1964-07-01 Brennkraft-Schlagwerkzeug
FR980497A FR1407893A (fr) 1963-07-03 1964-07-02 Outil de percussion
GB27573/64A GB1070787A (en) 1963-07-03 1964-07-03 Impact tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US292701A US3213607A (en) 1963-07-03 1963-07-03 Impact tool

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US3213607A true US3213607A (en) 1965-10-26

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US (1) US3213607A (de)
DE (1) DE1284368B (de)
FR (1) FR1407893A (de)
GB (1) GB1070787A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3278084A (en) * 1965-08-06 1966-10-11 Omark Industries Inc Impact tool
US3320740A (en) * 1965-07-02 1967-05-23 Walker Mfg Co Press
US3850359A (en) * 1973-05-11 1974-11-26 Fastener Corp Fastener driving tool
US4218888A (en) * 1979-02-12 1980-08-26 Jayne Michael E Impact device
USRE32452E (en) * 1981-01-22 1987-07-07 Signode Corporation Portable gas-powered tool with linear motor

Families Citing this family (4)

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Publication number Priority date Publication date Assignee Title
FR2398587A2 (fr) * 1977-07-28 1979-02-23 Liesse Maurice Machine a clouer, agrafer, ou autres, du type a percussion par explosion
FR2463267A1 (fr) * 1979-08-08 1981-02-20 Liesse Maurice Generateur thermique d'impulsions
DE3020286A1 (de) * 1980-05-28 1981-12-03 Hilti AG, 9494 Schaan Brennkraftbetriebenes setzgeraet
DE102007000226A1 (de) * 2007-04-13 2008-10-16 Hilti Aktiengesellschaft Handgeführtes Eintreibgerät

Citations (3)

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US2898893A (en) * 1958-04-11 1959-08-11 Little Inc A Impact tool
US2915030A (en) * 1953-10-14 1959-12-01 Fairchild Engine & Airplane Engine fuel supply system for dirigible vehicle power plant
US2924359A (en) * 1957-02-15 1960-02-09 Thompson Ramo Wooldridge Inc Expulsion bag fuel tank

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Publication number Priority date Publication date Assignee Title
FR1225975A (fr) * 1958-04-11 1960-07-06 Omark Industries Inc Outil à percussion

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2915030A (en) * 1953-10-14 1959-12-01 Fairchild Engine & Airplane Engine fuel supply system for dirigible vehicle power plant
US2924359A (en) * 1957-02-15 1960-02-09 Thompson Ramo Wooldridge Inc Expulsion bag fuel tank
US2898893A (en) * 1958-04-11 1959-08-11 Little Inc A Impact tool

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3320740A (en) * 1965-07-02 1967-05-23 Walker Mfg Co Press
US3278084A (en) * 1965-08-06 1966-10-11 Omark Industries Inc Impact tool
US3850359A (en) * 1973-05-11 1974-11-26 Fastener Corp Fastener driving tool
US4218888A (en) * 1979-02-12 1980-08-26 Jayne Michael E Impact device
USRE32452E (en) * 1981-01-22 1987-07-07 Signode Corporation Portable gas-powered tool with linear motor

Also Published As

Publication number Publication date
FR1407893A (fr) 1965-08-06
DE1284368B (de) 1968-11-28
GB1070787A (en) 1967-06-01

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