Abstract: A stapler for clinching materials together with a generally U-shaped staple. The stapler has an anvil with spaced-apart wedges disposed adjacent a backing plate, and the spaced-apart wedges have respective chamfers that contact legs of the staple and guide the legs away from each other. A driver blade is movable between the spaced apart wedges and pushes against a staple crown. As an actuator pushes the driver blade between the wedges, the staple is being pushed over the wedges. The actuator retracts the driver blade from between the spaced-apart wedges substantially independent of a biasing force pushing the spaced apart wedges against the backing plate.

Abstract: A nozzle assembly for nailers includes a magazine connected to a body of the nailer and a base plate is connected to an end of the magazine. A nozzle has two grooves with which the two sides of the base plate are movably engaged. A plurality of nail guide holes are defined through the nozzle and communicate with openings defined in the base plate and slots defined in a side of the magazine so that nails engaged with the slots are sent to the nail guide holes to be ejected. Two hooks extend from the nozzle and a cap is mounted on the nozzle by engaging the two hooks with two apertures defined through the cap. Pins extend through the nozzle and are engaged with the base plate.

Abstract: A pneumatic nailing machine mainly includes a main body, a guide nail block, a clamping block and a nail magazine; a clamping block is pivotally disposed on a lateral side of the guide nail block; the bottom end of the clamping block forms a push portion and the top end thereof forms a clamping portion. Pushing a magazine cover of the nail magazine upwardly to the top end of a guide nail plate pushes the push portion of the clamping block thereby making the clamping portion clamp a guide plate cover onto the guide nail block. Before detaching the magazine cover, the guide plate cover always clamps to the guide nail block so as to prevent the guide plate cover from opening mistakenly to accidentally eject nails.

Abstract: A stapling apparatus with a safety device for a stapler prevents staples from popping out of the stapler when a user wants to remove jammed or lodged staples. The stapling apparatus is pivotally attached to a stapler and has a housing with a front, a sliding front cover slidably mounted on the front of the housing so lodged staples can be conveniently removes and a safety device. The safety device includes a positive stop formed on the housing and a stop lip formed on the sliding front cover corresponding to the positive stop. When the user pushes the sliding front cover upward to remover lodged staples, the stop lip abuts the positive stop to limit movement of the sliding front cover. Therefore, the staples can be seen but are still held in the housing by the sliding front cover.

Abstract: The present invention relates to a wire retainer of a stapler that is applicable for stapling objects with different staple size, and such stapler comprises a groove bracket being disposed at the bottom edge between two side casings for accommodating the staples; a staple roller assembly being disposed on the groove bracket; a staple plate being disposed at the front edge of the side casing for shooting the staple; characterized in that: a detachable wire retainer being disposed at the front edge of the staple plate of the stapler such that the user can switch the wire retainer of different specifications, and maintain a smooth and stable stapling working surface for different stapler specifications without a need of switching the stapler. The present invention effectively improves the current existing stapler that can only fit a single specification to attain the purpose of convenient operation.

Abstract: A tacker for driving fasteners (11) into an object (14), which optionally consist of U-shaped staples or nails, has a driver (13) which in an ejecting motion ejects a fastener (11) and drives it into the object (14). Catches (19b) are arranged to prevent a nail (11) fed to an ejecting position from tilting to an inclined position which significantly deviates from the direction of ejecting/driving in. The catches (19b) are movable between a first position in which they extend into the path of the ejecting motion of the driver (13), and a second position in which they are moved away from this path against spring action. Each catch (19b) is formed don a tongue (19) which is punched in a plate (18) and bent to L shape, one L leg (19b) of the tongue extending perpendicular to the plane of the plate and forming the catch and the other L leg (19a) being positioned in the plane of the plate and forming a part which in a resiliently yielding manner supports the catch.

Abstract: A powered tool constructed to drive a fastener into a workpiece includes a nosepiece assembly including a back plate and a front plate combining to define a path for a driver blade, the front plate being pivotally movable relative to the back plate between a closed position, in which the front plate and the back plate are in contact with each other, and an open position. The front plate is movable to an interim deflecting position between the closed position and the open position. A handle portion has an outer surface at least partially defining a grip, and an inner surface at least partially defining a chamber. The handle portion includes a substrate having at least one aperture, and an overmold configured for forming a gripping surface on the outer surface and for extending through the apertures into the chamber for forming a resilient mounting point.

Abstract: A nail box device for a nailing gun includes a bottom base and a cover body pivotally combined together, letting the cover body opened and closed easily. The cover body can be locked together with the bottom base when a bolting device is moved upward and closes the nail box. The nail box can be opened when a nail pushing device together with the bolting device is pulled backward to a preset distance, able to open the nail box quickly and load a rowed nail into the nail box precisely.

Abstract: A fastener driving tool having a reciprocating driver blade and a nosepiece, and being configured for sequentially feeding fasteners to the nosepiece for engagement by the driver blade for subsequent driving into a workpiece, each fastener defining a plane, further includes a deformation formation in the nosepiece configured for engaging a portion of each of the fasteners so that upon impact of the fastener by the driver blade, the engaged fastener portion is deformed in a direction transverse to the plane to define a deformed portion, the deformed portion configured for providing a clamping force upon at least one of the workpiece and a workpiece material being secured to the workpiece. A fastener is provided for use in such a tool and includes a crown configured so that, upon impact with at least one of the workpiece and the workpiece material, the crown has a nonlinear configuration.

Abstract: A staple gun comprising a main body and a staple injection nozzle for injecting a staple into a target object, the staple injection nozzle including a nozzle body mounted on a staple striking body and a cover plate for removably closing an upper portion of a staple injection path of the nozzle body so as to guide the staple. The nozzle body has protrusions to receive an end portion of the cover plate and press this cover plate from upward, and an urging member is provided to urge the cover plate in a direction that the end portion of the cover plate intrudes into the protrusions.

Abstract: A powered tool constructed to drive a fastener into a workpiece includes a nosepiece assembly including a back plate and a front plate combining to define a path for a driver blade, the front plate being pivotally movable relative to the back plate between a closed position, in which the front plate and the back plate are in contact with each other, and an open position. The front plate is movable to an interim deflecting position between the closed position and the open position. A handle portion has an outer surface at least partially defining a grip, and an inner surface at least partially defining a chamber. The handle portion includes a substrate having at least one aperture, and an overmold configured for forming a gripping surface on the outer surface and for extending through the apertures into the chamber for forming a resilient mounting point.

Abstract: A nail guide device for a power nailer includes a nose portion and a guiding member mounted to the nose portion of the power nailer by a pin passing through a orifice of the guiding member and a pivot hole of the connecting portion. The passage of the leading edge contacts against the inside of the semi-circle passage by the virtue of a first end of a spring engaging to a protrusion of the connecting portion and a second end of a spring engaging to a bulge of the guiding member.

Abstract: A nozzle assembly for a pneumatic tool includes a base connected to a magazine and a rod extends from the base. A cover is pivotally connected to the base and a notch is defined in a side of the cover. A retaining member has a passage defined in an intermediate portion thereof so as to receive the rod therein. A spring is biased between a first end of the retaining member and the base. A second end of the retaining member has a hook which is disengagably engaged with the notch. The cover can be pivoted away from the base by releasing the hook from the notch so that the cover will not loose.

Abstract: A nozzle assembly for nailers includes a magazine connected to a body of the nailer and a base plate is connected to an end of the magazine. A nozzle has two grooves with which the two sides of the base plate are movably engaged. A plurality of nail guide holes are defined through the nozzle and communicate with openings defined in the base plate and slots defined in a side of the magazine so that nails engaged with the slots are sent to the nail guide holes to be ejected. Two hooks extend from the nozzle and a cap is mounted on the nozzle by engaging the two hooks with two apertures defined through the cap. Pins extend through the nozzle and are engaged with the base plate.

Abstract: A powered tool constructed to drive a fastener into a workpiece includes a nosepiece assembly including a back plate and a front plate combining to define a path for a driver blade, the front plate being pivotally movable relative to the back plate between a closed position, in which the front plate and the back plate are in contact with each other, and an open position. The front plate is movable to an interim deflecting position between the closed position and the open position. A handle portion has an outer surface at least partially defining a grip, and an inner surface at least partially defining a chamber. The handle portion includes a substrate having at least one aperture, and an overmold configured for forming a gripping surface on the outer surface and for extending through the apertures into the chamber for forming a resilient mounting point.

Abstract: An improved jaw structure for staple guns that may be disassembled easily from the gun barrel consists of a lower plate pivotally mounting to the barrel of the staple gun and having two retain hooks located thereon, and a slide block movable between the retain hooks having a rear end engaged with a spring. The slide block may be disengaged from the retain hooks by users' pushing, and may engage automatically with the retain hooks by the restoring force of the spring thereby to fasten the lower plate to an upper plate of the staple gun.

Abstract: A powered tool constructed to drive a fastener into a workpiece includes a nosepiece assembly including a back plate and a front plate combining to define a path for a driver blade, the front plate being pivotally movable relative to the back plate between a closed position, in which the front plate and the back plate are in contact with each other, and an open position. The front plate is movable to an interim deflecting position between the closed position and the open position. A handle portion has an outer surface at least partially defining a grip, and an inner surface at least partially defining a chamber. The handle portion includes a substrate having at least one aperture, and an overmold configured for forming a gripping surface on the outer surface and for extending through the apertures into the chamber for forming a resilient mounting point.

Abstract: The fastener tool includes a nosepiece, a nosepiece cover pivotally attached to the nosepiece, a latch pivotally attached to the nosepiece cover, a latch wire pivotally attached to the latch for engaging at least one hook disposed on the nosepiece, wherein the latch wire has a portion extending between the latch and the hook, the portion having at least two bends.

Abstract: A quick detachable fastener cover structure for a fastening tool comprising on the head of the fastening tool a cover plate, a housing, a pusher rod etc., wherein: the housing is fixed on the cover plate, and is provided with an engaging plate having a locking hoop, the cover plate is provided with a plurality of hooks and tenons; the guide plate is provided with engaging portions to engage the hooks on the cover plate; the guide plate has thereon a hook seat with a back hook and slide grooves to respectively receive the tenons and engage the locking hoop; the pusher rod is extended between the cover plate and the housing in order that it synchronically move with a safe slide rod on the guide plate; thereby a user needs only to simply move the engaging plate to in turn move the cover plate, and the cover plate on the guide plate can be quickly and tightly connected with or separated from the guide plate.

Abstract: A stapler includes a casing having a grasp hole defined therethrough and a staple receiving frame is received in the casing. A staple pushing device is engaged with the frame and a groove is defined in a periphery of the grasp hole so that a pressing rod is movably engaged with the groove. Two resilient plates each have an end fixedly connected to the casing and the pressing rod presses on the resilient plates. A staple ejection device is connected to the casing and is connected to the resilient plates. A handle is pivotally connected to the casing and disengagably connected to the staple ejection device. An outer cover is mounted to the casing and a front cover is removably connected to the casing.

Abstract: A staple gun comprising a main body and a staple injection nozzle for injecting a staple into a target object, the staple injection nozzle including a nozzle body mounted on a staple striking body and a cover plate for removably closing an upper portion of a staple injection path of the nozzle body so as to guide the staple.

Abstract: Disclosed is a vibration controlling construction of a quick-release member for a fastening element driving tool. The tool includes a central plate mounted on a top surface of a magazine of the tool. A detachable quick-release member is mounted on the top surface of the central plate. A trigger is pivotally mounted on the quick-release member and has a locking ring. At least one hook integrally protrudes from the central plate and extends over the quick-release member. A slot is formed on a face and a slope extending from a top edge of the slot. A controlling member is received in the slot of the hook. The controlling member includes a slant so configured to correspond to the slope of the hook to abut upon the slope.

Abstract: A box nailing machine is disclosed. In the box nailing machine, A seat has an inner space. A base is installed below the seat. A nail stopper is installed above the base in the inner space of the seat and being confined by the inner space to move up and down. A nail receiving space is positioned between the nail stopper and the base in the seat; and an adjustable stud is passed through the seat and nail stopper. Thereby as the adjustable stud is rotated, the nail stopper is driven to be moved up and down for changing a volume of the nail receiving space.

Abstract: A barrel unit of a pneumatic nail driving device includes a base plate with a pair of hooking lugs. An elongated cover plate is superimposed on and is pivoted to a rear portion of the base plate, and has a pair of pivot ears, a pair of abutment tabs projecting sidewise respectively from the pivot ears, and a pair of shoulder disposed behind the hooking lugs of the base plate. An operating lever has a pair of pivot ears mounted pivotally on the pivot ears of the cover plate in such a manner that the pivot ears of the operating lever slidably and respectively contact the abutment tabs, and a U-shaped clasper pivotally connected to the operating lever. After disposing the clasper around the hooking lugs, rearward pivotal action of the operating lever results in engagement between the clasper and the hooking lugs and subsequently causes tight engagement between the pivot ears of the operating lever and the abutment tabs, and tight engagement between the shoulders and the hooking lugs.

Abstract: A nail guide mechanism, suitable for use with a wide variety of nail guns, having a mounting bracket to permit ready attachment and/or removal in the field. The guide mechanism, when mounted, is oriented about the channel defined by the nose of the nail gun. The guide mechanism includes a partially pre-compressed spring that induces a bias on a pivoting arm such that the arm is caused to protrude at least partially into the channel. The arm is thus positioned to continuously exert a force on the nails as they are driven down the channel past the arm. Because the spring is only partially pre-compressed, the positioning of the arm is responsive to changes in conditions inside the channel, such as when the head of a nail passes by the arm. The force exerted by the arm, under the influence of the spring, acts substantially along the radial axis of the nail, and is exerted on the nail during at least a portion of the time that the nail is being impelled by the driving mechanism of the nail gun.

Abstract: A nose assembly for a nail gun includes a nose piece connected to a gun body and the nose piece has a guide channel in a surface thereof. A resilient strip has its first end fixedly connected to the nose piece and a guide base is located below the nose piece. The nose piece has an extension channel which is in alignment with the guide channel, and a second end of the resilient strip is connected to the guide base. Two oblique surfaces are respectively defined in two inside defining the extension channel and a block extends from a surface defining the extension channel. Two grooves are defined between the block and the two oblique surfaces so that two legs of nails will be separated and inserted into the grooves before penetrating into document.

Abstract: An impelling blade guide is inserted into a space provided for inserting a blade unit in order to create a simple structure for the removal of staples which have become jammed in the staple ejecting mouth during empty operation. A notched section is formed in proximity to the staple ejecting mouth of the frame. During normal operation, the impelling blade guide can be easily raised since an indentation formed on the notched section and a projection formed on the impelling blade guide are fixed. When a staple is jammed in the staple ejecting mouth, the impelling blade guide is pulled up and the projection separates from the indentation. Thus the rear surface side of the staple ejecting mouth is opened. In such a way, jammed staples can be easily removed from the staple ejecting mouth.

Abstract: A secure device for a power stapler includes a top cover on a front end board of the power stapler and a pivotal member pivotally connected to the top cover. A locking frame is engaged with two hooks on the front end board and two plates are overlapped to two side arms of the locking frame. Two springs are respectively mounted to the overlapped side arm and the plate. The two plates are connected to the pivotal member. The springs assists a convenient operation of the pivotal member whenever the pivotal member is lifted upward or pushed downward.

Abstract: A stapler includes a base having a first end portion and a second end portion, a first staple magazine having a first end portion pivotally connected with the first end portion of the base and a second end portion formed with a closed face and containing a staple ejection slot on the bottom portion thereof, a second staple magazine received in the first staple magazine and having a first end portion connected with the first end portion of the first staple magazine and a second end portion, a plurality of first staples each slidably mounted on the second staple magazine and received in the first staple magazine, a plurality of second staples each slidably received in the second staple magazine, and a pressing cap having a first end portion pivotally mounted on the first end portion of the base and a second end portion formed with a staple ejector which can be moved to align with the staple ejection slot.

Abstract: A staple ejection device for a power stapler includes a guide plate having two hooks, a strip and a cover member are respectively and pivotally connected to the two lugs. The cover member has a retaining plate which defines a gap between the retaining plate and the cover member. A control member is retained in the gap between the retaining plate and the cover member, two springs biased between the control member and a positioning block of the cover member so that the control member is movable in the gap. The control member has two buttons each of which has a cone-shaped end which is engaged with the hook on the guide plate. The cover member is pivoted away from the guide plate by pulling the buttons to disengage the two buttons from the hooks.

Abstract: An attachment for a nailing machine in which a nose part drives out a nail having a nail head portion and a nail shaft portion, and in which a driver repeatedly strikes the nail, includes: a holder removably attached to the end of the nose part; nail guide members oppositely disposed on the end of the holder with respect to the center axis of the nose part, each of the nail guide members including, a first guide surface provided on an inner side thereof increasing in diameter in a taper form toward the holder, for guiding the nail head portion driven out from the nose part, a second guide surface provided continuous with the first guide surface, an inner diameter of the second guide surface being the same as or smaller than the diameter of the nail shaft portion, wherein the entire circumferential surfaces of the nail head portion and the nail shaft portion are guided by the first and second guide surfaces, and an outer surface tapered such that the outer surface narrows toward the end edge of the second guid

Abstract: A nail track and nail output head arrangement which includes a nail track having a longitudinal nail guide wall, the nail guide wall having a side lug and a flanged to notch, and a nail output head having an integral mounting plate at an inner side and defining a substantially U-shaped nail output port, the mounting plate having two parallel lugs perpendicularly disposed adjacent to one end of the U-shaped nail output port and bilaterally pivoted to the lug of the nail track, an upright locating plate surrounded by the U-shaped nail output port and forced into engagement with the notch of the nail track, and a nail guide plate perpendicularly disposed adjacent to an opposite end of the U-shaped nail output port.

Abstract: In a nosepiece/receiver assembly having a housing for receiving a part, a removable jaw mechanism that is mounted for pivotable movement against a biasing spring. The jaw member has a contoured surface for holding a part received by the nosepiece/receiver assembly when the jaw member is in a part holding position. The jaw member includes channel at one end for enabling the jaw member to pivot about a securing member of the assembly to a part releasing position. The jaw member may consist of either two cooperating movable jaws or one separate jaw. The jaw mechanism also includes a resilient biasing device for urging the jaw member into a part holding position. The biasing device is in contact with both the housing of the nosepiece/receiver assembly and the jaw member, with at least a portion of the resilient biasing device being external to the jaw member to allow easy replacement of the biasing device. The biasing device is positioned to minimize the chance of breakage of the jaw.

Abstract: A power stapler in which the electromagnetic valve has a movable annular metal block which moves downwards to prevent the occurrence of a high striking noise when attracts the valve rod to strike the striking plate; the guard plate which stops staples in the magazine can be alternatively adjusted to the closed position to close the front end of the magazine, the open position to open the front end of the magazine for the loading of staples, or the mid-way position to partially close the front end of the magazine for permitting jammed staples to be removed from the magazine.

Abstract: A sharpshooting nail gun capable of driving a nail into an intended spot. The nail gun includes a bit guide having an injection groove through which a nail and a drive bit pass. A contact arm is movably supported to the bit guide. The contact arm has a lower tapered end portion abuttable against a wall or attachment member, and an upper portion engageable with a trigger. When the contact arm is biased toward the wall, the upper portion is disengaged from the trigger for allowing the trigger to be manipulatable. The lower portion of the contact arm protrudes from a lower end of the bit guide, and is provided with an injection bore extending in alignment with the injection groove.

Abstract: A barrel unit for a nail driving gun includes an elongated base plate and an elongated cover plate. The base plate has a top side formed with a longitudinal discharge groove, a pair of upwardly extending positioning lugs at a rear portion of the base plate, and a pair of upwardly extending hooking lugs at a front portion of the base plate. Each of the positioning lugs has a rearwardly inclining rear end surface. The cover plate is formed with a pair of first slots and a pair of second slots which permit extension of a respective one of the positioning lugs and the hooking lugs therethrough. Each of the first slots has a rearwardly inclining end wall surface which abuts against the rear end surface of the respective one of the positioning lugs when the cover plate is superimposed on the base plate.

Abstract: A cartridge stapler having a head, a driver blade and a sheath in which the sheath is controlled by configured sheath holes, head slots and selective positioning of the cartridge. Cartridge insertion stabilizes the sheath during normal operation to reduce jamming and upon its removal allowed for sheath movement to clear a jam.

Abstract: A stapler in which the sheath is held in fixed operable position by a pin during operation with the sheath configured to assure such holding. Sheath opening is accomplished by action of a separate release lever which releases with ease the sheath from the pin.

Abstract: An automated apparatus for attaching studs to fabric such as leather jackets jeans, shirts or the like. The apparatus including a feeder for supplying studs to the apparatus, a stud support, a stud placement member, a stud driving member for guiding a stud through its full path of travel until the legs contact a fabric into which they are inserted, a stud positioning member configured to displace the stud placement member and to displace the stud support and a stud fastening member disposed below the stud driving member for bending at least one leg of a stud upon the stud driving member guiding the stud through its full path of travel. The stud support and the stud placement member hold a stud in place for the stud driving member to drive a stud into a fabric and contacting the stud fastening member which bends at least one leg of a stud to fasten a stud to a fabric.

Abstract: An improved magazine for a fastener driving tool having a two piece back plate allowing easy access to the drive track for removing jammed fasteners from the tool. The magazine consists of a first fixed rail having a back plate section perpendicular to the rail, and a second rail slidable with respect to the fixed rail, having a second back plate section perpendicular to the rail. When the magazine is in the fastener driving position, the back plate sections provide extra support for the drive track.

Abstract: A nose assembly of a fastener driving tool is disclosed for facilitating the removal of any jammed fasteners, which become lodged in the nose assembly. The nose assembly has a front and back plate pivotally connected to define therebetween a drive track. The back plate is secured to a housing structure adapted to drive a fastener from a drive track into a workpiece. A magazine assembly for storing a strip of the fasteners is adapted to feed the leading fastener into the drive track. In its operative position, the leading fastener within the magazine assembly is positioned in the drive track abuting the front plate. To remove any jammed fastener, the front plate is pivoted to an inoperative position to expose the jammed fastener in the drive track for easy removal.

Abstract: A housing structure including a manually engageable handle for enabling a user to portably operate the device and a nosepiece portion disposed forwardly thereof. Extending rearwardly from the nosepiece portion is a magazine assembly which together with the nosepiece define a drive track therebetween. A fastener driving element is slidably mounted in the drive track. Power operated means for moving the fastener driving element are provided within the drive track moving the fastener driving element through successive operative cycles each including a drive stroke in one direction and a return stroke in an opposite direction. The magazine assembly includes a fastener stick receiving feed track and means for biasing a stick of fasteners in the feed track to move a leading fastener of the stick into the drive track to be driven therefrom during the drive stroke of the fastener driving element into a workpiece.

Abstract: The end-to-end anastomosis apparatus is provided with a mounting means which can receive a trocar for making holes in tissue and, subsequently, an anvil shaft for the mounting of an anvil assembly for stapling purposes. The anvil shaft is provided with splines which cooperate with splines on a shell liner within the housing of the apparatus to align the buckets on the anvil assembly with the staples in a cartridge secured in the apparatus. In addition, the anvil assembly is provided with a spring for locking of the anvil housing on the anvil shaft.

Abstract: A mechanism is provided for removing a jammed fastener from a fastener drive track formed in a driver guide of a fastener driving device through an opening formed in the fastener dive track. The fastener driving device includes a driver reciprocally driven by a driving source to drive fasteners fed into the fastener drive track. The mechanism for removing the jammed fastener includes a movable member for closing the opening of the fastener drive track. A connecting mechanism connects the movable member to the drive guide to such a manner that the movable member is movable relative to the drive guide between a first position for closing the opening and a second position for opening the opening. An engaging mechanism is provided for engaging the movable member with the driver guide so as to keep the movable member at the first position. A first biasing mechanism biases the movable member in a direction to engage the same with the driver guide.

Abstract: A screw driving device for screws connected by a screw connecting strip is essentially constituted by a motor body and a guide with which a screw magazine and a slider are associated, with said slider being provided with side channels for screw feeding and a longitudinal channel for screwing down said screws; on said slider, an element is furthermore provided which, during the screwing down step, prevents said screw connecting strip and the other screws from moving from their correct feeding position.

Abstract: An installation apparatus for use in attaching fasteners to a panel is provided having a magazine plate, plunger, fastener holder and retainer. The fastener holder is comprised of an elastically expanding body and includes generally inwardly sloping internal sidewalls defining a conically shaped passage therethrough and wall members which are slit therethrough. The installation apparatus is of particular use in fastener dispensing and installation devices which require the fastener to maintain a precise orientation during delivery and fastening.

Abstract: A pneumatically operated fastener driving tool having a pivotally mounted magazine. The displacement of the magazine is used to actuate the tool when the nosepiece is in engagement with a workpiece. With the magazine travel kept to a minimum, the magazine is coupled to a cam lever which amplifies the displacement of the magazine. One portion of the cam lever is in engagement with a trip lever which forms a bearing surface for the trigger valve cartridge, which enables the tool when the magazine is in a drive position. The geometry of the cam lever causes a relatively greater displacement of the trip lever than the displacement of the magazine. The fastener driving tool also includes a poppet valve for controlling the compressed air flow into the drive cylinder. The top portion of the poppet is subject to the compressed air reservoir within the tool. A poppet chamber disposed at the bottom of the poppet controls the opening and closing of the poppet valve.

Abstract: A pneumatic tool is provided with a magazine having an open feed end extending into the fastener's guide body, with a sacrificial anvil attached at the open feed end and easily removable when required because of wear. The fastener magazine also includes removable and adjustable side rails for adjusting the dimension to accommodate fasteners of different sizes. The fastener is provided with a feeder shoe having a pivotal finger which permits fasteners to be easily loaded underneath the feeder shoe and then drawn rearwardly to urge the fasteners across the open feed end of the magazine. The tool includes a pivotal front plate having a spring mechanism for reducing the risk of injury when the front plate opens as a result of a fastener jam.

Abstract: A stapler with a pivotal sheath which sheath rotation is controlled by a hand-operable control piece. The control piece is anchored to anchor protrusion to place the sheath in its normal operating position. The control piece is releasable from its anchor protrusion to rotate it to assist in releasing jammed staples.

Abstract: The end-to-end anastomosis apparatus is provided with a mounting means which can receive a trocar for making holes in tissue and, subsequently, an anvil shaft for the mounting of an anvil assembly for stapling purposes. The anvil shaft is provided with splines which cooperate with splines on a shell liner within the housing of the apparatus to align the buckets on the anvil assembly with the staples in a cartridge secured in the apparatus. In addition, the anvil assembly is provided with a spring for locking of the anvil housing on the anvil shaft.