Abstract: A vacuum-compression type percussion power tool comprising a housing (12), a cylinder (14) fixed in the housing, a piston (16) reciprocating in the cylinder (14) from a reciprocating drive mechanism such as a crank mechanism (18) driven by an electric motor, or any other suitable drive, a working tool (24) installed in the front part of the power tool, and a floating striker (34) which slides inside the cylinder (14) in a space between a tail portion (26) of working tool (24) and the lower end of the piston. The power tool has a sealed auxiliary chamber (54, 56) which is formed by means of a hollow casing (48) which surrounds the cylinder, and a space below the striker (34). The auxiliary chamber is connected to a main working chamber (38), which is formed between the piston and a striker, through a set of compensation holes (44) and a set of idle-stroke holes (46). A check valve (51) is installed in the wall of the auxiliary chamber.

Abstract: A device for applying a working or assembling process to an article at an appropriately selected position as temporarily mounted to a supporting plate through a hole formed therein, having a housing of a generally twofold tubular structure, an annular piston disposed in an annular space in said housing and adapted to be axially reciprocated by selective supply or exhaust of pressure fluid, and a plurality of cotter members arranged in the tubular housing so as to be selectively driven out of the tubular housing radially outwardly as driven by the annular piston by way of a wedging engagement with the annular piston, so that the cotter members are driven against the inner peripheral wall surface of the hole of the supporting plate with very high force available by the wedging engagement.

Abstract: A power driven rotary tool includes a housing and an electric motor mounted within the housing. A transmission shaft is rotatably supported by the housing, and a drive gear is idly supported by the transmission shaft and is operatively connected to the electric motor. A clutch is provided being engageable with the drive gear, and is rotatably and axially movably supported by the transmission shaft. A slider is axially movably fitted on the transmission shaft, and a spring is operatively connected to the slider for urging the clutch toward the drive gear. A manually-rotatable selector ring is provided and is attached to the housing. The slector ring includes a cam face curved along the peripheral edge thereof and having a plurality of steps formed in a direction axially of the transmission shaft so as to displace the slider by stages in the axial direction for adjusting the amount of compression of the spring.

Abstract: An indirect firing fastener driving tool is provided including a barrel (51), a piston (6) sliding in the barrel for driving a fastener (3) housed in a fastener guide (7). Between the barrel (51) and the fastener guide (7) are disposed a rigid ring (22) and a resilient ring (24). Inside the resilient ring (24) is disposed a rigid ring (27) for limiting the stroke of the ring (22) intended to be received in a recess (25) provided at the rear part of the fastener guide (7). The head (14) of the piston is of a truncated cone shape and may cooperate with a bore (23) of corresponding shape in the rigid ring (22). The rings serve as absorber for the piston (6) whose stroke is thus controlled.

Abstract: A machine 10 to insert "T Nuts" 77 into a piece of timber, the machine 10 including a pneumatically operated insertion assembly 12 having an air nozzle 46 which moves the "T-Nut" 77 to an insertion location and a pneumatically operated ram 20 which has a piston 26 movable from a retracted position to an extended position inserting the "T-Nut" 77.

Abstract: A top head drive assembly for a drilling machine includes a wrench assembly used to make up and break out threaded connections. This wrench assembly is mounted for axial movement on rails of the top head drive assembly, and is positioned immediately under the quill. The top head drive assembly also includes a tubular support assembly which includes slip type inserts for supporting a string of down hole tubulars. This support assembly can be pivoted out of alignment with the drilling axis or can be locked in alignment with the drilling axis. A plurality of centering elements are mounted under the support assembly and are movable to center the upper end of a tubular for insertion into the tubular support assembly. Preferably, both the top head drive assembly load beam and the support beam of the support assembly are formed of box sections having converging side plates and internal diagonal brace plates which transmit downward forces on the beam into forces tending to cause the side plates to diverge.

Abstract: The driver is disclosed for a surgical micro-suturing stapling system which does not require the use of a staple bending anvil tha must be retracted after the staple is implanted. The surgical microstapler system utilizes a unique stapler head comprising a staple magazine having a series of staples attached to and supported by a surrounding frame, apparatus for advancing the staple magazine so as to position its leading staple in a predetermined dispensing position, and staple driving apparatus for implanting the leading staple into the tissue through the ejection slot. The stapler head is adapted to be connected to the driver which provides the driving force required to cause the staple driving apparatus to separate the leading staple from the magazine and implant it into the tissue to be sutured. The driver offers the advantage that can cause the staple driving apparatus to implant a staple at a velocity in excess of the ability of tissue to respond dynamically under the force of a staple being implanted.

Abstract: The anvilless surgical stapler includes a pair of stapling assemblies which are mounted on the articulated handles of an applicator. Each stapling assembly includes a mounting block and a staple cartridge which is slidably mounted within the block. Further, each cartridge has a housing with a plurality of openings in which staples are slidably received along with a plurality of pushers. When the stapling assemblies are brought together, one or more ribs in the mounting blocks cause the pushers to fire the staples from the openings of the staple cartridge housings. A pair of deformable lips are also provided at the mouth of each opening for deforming the legs of each staple inwardly toward each other in order to embed into the tissue without penetrating into the tissue. The lips also permit passage of the deformed staples under the biasing force of the pushers.

Abstract: A guide assembly mounted on a fastener driving tool locates the tool a predetermined distance from the edge of hardboard siding or a similar workpiece and assures that a fastener is driven into the workpiece the correct distance. The tool includes a housing having a nose defining a drive track and a driver blade for driving fasteners along the drive track into the workpiece. A safety member moves relative to the housing between a workpiece responsive position extending beyond the nose and an operating position, and a spring urges the safety member toward the workpiece responsive position. The guide assembly includes a yoke with a central portion adjustably mounted to the safety for controlling fastener penetration. A pair of laterally extending arms carry edge guides to locate the tool spaced from the workpiece edge in either of two different tool orientations. The edge guides are retractable so that one may be retracted when the other is used, or so that both may be retracted if neither is used.

Abstract: A regulator for adjusting the amount of power generated by a pneumatic fastener driving tool of the type having a body connected to a source of air under pressure and containing a cylinder with a piston/driver assembly mounted therein and a main valve. The main valve is slidably supported above the cylinder on a centerpost affixed to a cap closing the top of that portion of the tool body surrounding the cylinder. The main valve is shiftable on the centerpost between a closed position engaging the upper end of the cylinder and shutting off the cylinder from the supply of air under pressure within the tool body and opening vent passages in the centerpost and cap to vent the cylinder volume above the piston to atmosphere, and an open position closing the vent passages and opening the upper end of the cylinder to air under pressure within the tool body to actuate the tool. The regulator comprises an adjustable stop mounted in the centerpost and extending thereabout.

Abstract: A tag-pin attaching apparatus is disclosed, which comprises (a) a tag-pin feeding mechanism for intermittently feeding a leading tag pin of a tag-pin assembly to a cut-off position, which tag-pin assembly consists of a plurality of tag pins, each tag pin comprising a head part and a lateral rod which are integrally connected through a filament, and each tag pin being separable from the tag-pin assembly at the cut-off position, (b) a guide needle situated in front of the cut-off position, (c) a guide groove for guiding the lateral rod of the tag-pin assembly in the feeding direction thereof, (d) a transporting mechanism, situated behind the tag-pin feeding mechanism, for pushing the tag pin positioned at the cut-off position into the guide needle, and (e) a driving mechanism for driving each of the above mechanisms, with the improvement wherein the feeding mechanism comprises (i) a slide body which is movably disposed in the feeding direction of the tag pin, (ii) a toggle link comprising a first link and a sec

Abstract: Method and apparatus for inserting fasteners into holes in a workpiece. The apparatus includes a finger carrying device which is carried by an anvil for telescoping movement relative to the anvil, the finger carrying device includes a bore coaxial with the anvil and through which the anvil may pass as it moves from a raised position to a lowered position. The finger carrying device is provided with a side port through which fasteners may be inserted by a gravity injector, the side port being disposed below the anvil when it is in its raised position. A plurality of annular arrays of resilient fingers are mounted in the bore below the side port. A fastener, after being injected into the bore of the finger carrying device, is pushed by the anvil through the fingers as the anvil moves to its lowered position, the annular arrays of resilient fingers properly orienting the fastener in coaxial alignment with the anvil and with a hole in a workpiece.

Abstract: A vibratory hammer/extractor for use with elongated pilings and the like extended into the earth includes a clamping assembly for releasing and securing the hammer to an upper end portion of a piling extended into the ground. A vibratory exciter is mounted on the clamping assembly for generating vibratory forces to be imparted to the piling while clamped tightly, and a suspension device is provided for supporting the exciter and isolating the vibration thereof from a hammer supporting element such as a flexible cable extending downwardly from the boom of a crane. The vibratory exciter includes a hollow gear case having a lower end wall secured to the clamping assembly and at least one pair of eccentric weights mounted on shafts for rotation about an axis transversely of the clamped piling for imparting vibratory forces to the piling as the eccentrics are driven in rotation.

Abstract: In an automatic fastener assembling apparatus, a device for actuating a drive to initiate the lowering of a punch includes a pivotable actuating lever having at its front end portion a lower sloping edge and at its rear end portion a projection the front end portion being normally urged upwardly by an extension spring. A safety cover is connected to the lever by a leaf spring normally defining with the sloping edge a triangular space. At the first stage of double-stage stepping of a foot pedal, the front end portion of the lever is lowered against the bias of the extension spring until the safety cover rests on a die. At the second stage, the front end portion is further lowered against the bias of both the extension and leaf springs to reduce the triangular space, thus causing the projection to depress a plunger of a microswitch for the drive.

Abstract: A reversible percussion device, having a casing 1 in which is installed a movable striker and a system for distributing fluid under pressure for causing the striker 4 to move for both forward and rearward movement functions of the device. The system comprises a control member 9 for controlling the distribution of fluid under pressure for both functions, which is movably coupled to the striker 4 and has a mechanism for locking it with respect to the casing 1 in two control positions, corresponding to the two functions of the device. According to the invention, the mechanism for locking the control member 9 in the position enabling the forward movement functions of the device comprises a body 11 movable relative to the control member 9.

Abstract: A vibration-damping control handle connectable to the shaft portion of a portable power tool, such as a flexible line trimmer or the like, has an elongated, axially tapered body which coaxially circumscribes the shaft and has an operator handgrip section secured thereto. A first end portion of the body is spaced laterally outwardly from the shaft and is interlocked with a free end portion of a resilient damping member which circumscribes the shaft and is secured to a clamp member releasably locked on the shaft. The opposite end of the handle body is connected to the shaft in a slip-fit relationship therewith so that the body may be laterally pivoted or flexed relative to the shaft against the resilient resistance of the free end portion of the damping member which may be a coiled spring or an annular elastomeric element.

Abstract: A submergible electrohydraulic drive unit is a multi-purpose device for driving different underwater ramming and working devices and has a housing with a throughgoing central receiving space for a ramming pile or a respective ramming or working device, ring-shaped upper and lower supporting plates, an outer wall, an inner wall which forms the receiving space, and a plurality of pump units arranged between the inner wall and the outer wall and each having a hydraulic pump and an associated electric motor and individually or jointly limitedly movably spring-biased relative to the housing, one supporting plate having means for exchangeably mounting said device adjusted relative to said receiving space.

Abstract: In order to perform an anastomosis, a pilot head of a surgical staple suturing instrument is connected through a push-type or a threaded connector and through a paraboloid-like cap so as to simplify introduction into the organ that is to be anastomised. The combination body is pushed through the organ with the help of a probe, as far as the end of the organ that has been sutured with a purse-string suture. Once the desired position of the pilot head is reached, the cap is released and then removed. The pilot head is then connected with the end of the journal of the staple suturing instrument through the push-type or threaded connector.

Abstract: For driving of ramming parts under water, a first ramming device is suspended on the supporting element and a second ramming device is suspended on a further supporting element, a submergible electrohydraulic drive unit is located laterally near or under one of the ramming device and connected with both ramming devices by hose conduits, the ramming devices with the drive unit are lowered so that at least one ramming device is placed on one ramming part and after driving it in over a predetermined path it is transferred to another ramming part, while the other ramming device drives further the first ramming part or a further ramming part, and both ramming devices are driven one after the other or simultaneously with one another by the same drive unit.

Abstract: An ice auger driven manually by foot power through the instrumentality of a foot driven ratchet drive rotatably affixed to a set of bevel gears permanently mounted in a framework affixed to a stable base. An assymetrically shaped auger shaft with a rotatably mounted handle assembly and a permanently attached auger head is positioned vertically through, but not affixed to, the assymetrical bore of the horizontally positioned bevel gear permitting vertical movement of the shaft within the bore during operation. The combination of rotation created by the operation of the ratchet, the constant rotational force point on the auger shaft at the assymetrical bore of the horizontal bevel gear, combined with the simultaneous vertical movement of the auger shaft, results in a constantly changing point on the shaft where the bevel gear imparts rotational force. The vertical movement of the auger shaft is facilitated by the operator's downward pressure on the handle.