Abstract: This disclosure concerns a tool fixing mechanism including a hollow grip and a resilient clip body. The grip has a front end and a rear end. The front end is formed with a slot, while the rear end is formed with a cross-shaped socket. Two windows are respectively formed on the top and bottom walls of the rear end of the grip. The resilient clip body is located in the cross-shaped socket of the grip. The resilient clip body is formed with two lugs extending out of the windows of the grip. Therefore, if a user depresses the lugs, the resilient clip body is closed or stretched open so as to fixedly latch or release a tool inserted in the slot of the front end of the grip.

Abstract: A surgical instrument has a housing which contains a motor that drives a spindle. A tool bit is attached to the motor by a holder that includes a body with a first end portion connected to the spindle, a central portion with a cavity therein, and a second end portion having an aperture through which a shaft of the tool bit passes into the cavity. A pair of lock pawls are pivotally mounted in the cavity with each one having a first tab that enters a slot in the shaft when the lock pawls are in a first position to hold the tool bit in the instrument. The first tabs retract from the slot when the lock pawls are in a second position for changing the tool bit. The lock pawls have second tabs that engage a restrainer only in the second position to prevent the body from rotating. A ring extends around the body and pivots the lock pawls between the first and second positions when the ring moved longitudinally along the body.

Abstract: The reciprocating plunger of a power tool has a planar surface for substantial co-extensive engagement with one side of the mounting portion of plural ones of blades of varying thicknesses. A housing mounted to the plunger includes a cavity and rotatably supports a cam block in the cavity. The cam block has an arcuate cam face establishing respective plural axial lines of contact with the other side of the mounting portion of ones of the blades of varying thicknesses. Each of the lines of contact occupies an over-center relationship with respect to a plane perpendicular to the blade and containing the axis of rotation of the cam block.

Abstract: An apparatus for the detachable coupling, particularly of gripping devices or corresponding tools on robot arms or the like, is disclosed. The apparatus generally comprises two flange elements fastenable at the gripping device and robot arm, a receiving recess on one of the flange elements and an engagement element on the other, wherein the engagement element is inserted into the recess and one of the flange elements is penetrated by a locking pin in the locking position.

Abstract: A broach handle for use with an orthopedic broach includes an elongated handle having one end portion for making a connection with the broach and another end portion for gripping by the user and having an anvil that allows the handle to be hammered. A rotating locking member is carried in a slot at the distal end portion of the handle. The rotating locking member has inclined surfaces that allow the broach to separate from the handle when the inclined surface is positioned adjacent the broach. The rotating locking member also includes a thickened portion that forms a connection with the broach when positioned adjacent the broach.

Abstract: A chuck for securely holding a cutting tool while being rotated by a driving apparatus. The chuck includes a chuck body defining a tool bore into which the cutting tool may be inserted. A cam assembly is pivotally mounted to the chuck body and operably extends into the tool bore. An actuator cooperates with the chuck body and is positionable to operate the cam to secure or release the cutting tool, within the tool bore. In an alternative embodiment, a collet is used and the cam and actuator operate to secure or release the collet, and any cutting tool inserted into the collet, within the bore.

Abstract: The invention relates to a device for mounting a saw-blade provided with an opening to a carrier which is connected to a drive device to make a reciprocating movement, wherein the device comprises: a wall extending in the direction of movement which is suitable for contact with a side of the saw-blade; a mounting body which is rotatable opposite the wall around a shaft extending perpendicularly of the direction of movement and parallel to the wall and which is provided with a protrusion which is movable into the opening arranged in the saw-blade; and urging means for urging the mounting body to a mounting position wherein the protrusion extends into the opening arranged in the saw-blade. Mounting takes place because via the sphere the saw-blade generates a moment in clockwise direction relative to the shaft. This moment is counteracted by a moment that is generated by the friction between the actuating rod and the contact surface.

Abstract: A mixer for liquids and liquid suspensions has a motor drive and housing which is portable and can be carried from tank to tank and attached to the tank where mixing is carried out. The housing depends from the yoke and contains a quill which is driven by the motor drive. A chuck mechanism is associated with the housing and quill to enable mixer impeller shafts to be held in assembled relationship in the mixer and readily removed and replaced with shafts having impellers specially adapted for the particular mixing application of interest. The chuck mechanism is operable even though the quill is hidden in the mixture housing.

Abstract: An attachment to a socket wrench and the like carries a rocker arm in a recess in the body of the attachment. The rocker arm rocks about a shaft inserted transversely of the arm in a pair of apertures in the attachment body. At one end of the arm a compression spring seated in a concavity in the attachment body urges a detent carried on the other end of the arm to enter through an opening into the engaging receptacle at the other end of the body.A nut forced into the engaging receptacle cams the end of the detent outwardly of the receptacle, and when the nut is seated, the action of the spring on the arm causes the nut to be retained. By simply pressing on the arm against the spring, the spring may be further compressed to release a nut in the engaging receptacle.

Abstract: A quick detach bit apparatus includes a wear sleeve having a chuck threaded thereinto. A bit is mounted within the chuck. The bit and chuck are interconnected by mating, axially extending splines and grooves. The chuck includes a resiliently mounted segment urged into engagement with the bit. A quick release tool is accommodated in a passage between the bit and chuck. The tool is inserted into the passage and has a thickness sufficient to urge the segment out of engagement with the bit so that the bit is removed from the chuck.

Abstract: A quick-change mechanism is provided between a male member and a female member which has a socket with an axis. A flange is provided on each member, and in the flange of the female member an eccentric circular cam is pivotably mounted on one side of the socket. The cam may be pivoted through an arc between a locked and an unlocked condition in a single plane. The unlocked condition moves the cam laterally outwardly beyond the cam follower surface in the male member. As the cam is rotated towards the locked condition, the cam locking surface moves in a single plane laterally inwardly and establishes an axially inward force on the cam follower surface. The quick-change mechanism is small and compact and contained entirely within the flange of the female member. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applications, and is not to be construed as a limitation on the scope of the claimed subject matter.

Abstract: A holder of improved construction for mounting a saber saw blade on a drive means for reciprocation. The holder includes means defining a slot for receiving the blade, and means coupled with the support means for retaining the blade in the slot and for preventing movement of the blade relative to the support when the support and blade are reciprocating under the influence of the drive means. The holding means in several embodiments includes cam members which are received in notches in respective blades. Other embodiments relate to the formation of blade-receiving slots by moving wall means into proximity with recesses in side faces of elongated members.

Abstract: A quick release adapter for releasably mounting a tool or the like on a support includes a holding fixture adapted to be mounted on the support and having a slot therein for slideably receiving a mounting plate upon which there is secured a tool or the like. The mounting plate is releasably locked in the holding fixture by a locking element which extends through a through-hole in the fixture. The locking element is carried by a lever which is pivotally mounted on the back of the fixture and includes a handle which may be manipulated to move the locking element into and out of locking engagement with one edge of the mounting plate.

Abstract: A holder is provided for attaching a tool, having a tapered end and a flat driven face on the end, to a rotary drive, such as a drill. The holder has a body with a bore coaxial with the rotary axis. The bore is tapered at one end for slidably receiving the tapered tool end and typically is threaded at the other end for receiving the threaded end of an adapter. The other end of the adapter has six sides for attaching the tool holder to the drill. A flat driving face is provided at the tapered bore for engaging a complementary driven face formed in the tapered end of the tool. The tool is secured axially within the tapered bore by a latch element which extends into the tapered bore to engage a recess in the tapered end of the tool. The latch element can be a pivotal latch plate mounted for movement in a radial plane or a radially extending detent assembly. The latch element can also be magnetic.

Abstract: A chisel retaining device for a power operated percussion tool comprises a one-piece lock shell (20) which surrounds the chisel stem (17) and is pivotably supported on the front end of the tool housing (10). By pivoting the shell (20) about an axis (X) transverse to the chisel axis a large dimension part (29) or a small dimension part (28) of a front opening (27) of the shell (20) are alternatively aligned with the chisel (15) to prevent or permit passage of a flange (18) on the chisel (15). A spring means (24) is provided to keep the shell (20) in closed position. An internal annular shoulder (21) of the shell (20) cooperates with a toroidal spring (22) received in a circumferential groove (23) on the housing (10) to form an axial abutting means for the shell (20), and an inwardly projecting heel (31) forms together with the shoulder (21) and the toroidal spring (22) a pivot means for the shell (20).

Abstract: A multiple spindle boring head including a plurality of boring spindles simultaneously radially positionable relative to a central boring head axis by a plurality of associated lead screws which are mounted for rotation but not translation relative to their respective longitudinal axes, whereby the overall radial extent of the boring head remains constant relative to the boring head central axis as the boring heads are adjusted radially. In one embodiment, a pair of multiple spindle boring heads are mounted adjacent one another on a boring machine equipped with an indexable work table to permit simultaneous operations on two work pieces. A quick change tool support means is disclosed to permit very rapid change of tools in each boring spindle without requiring the use of a positioning jig.

Abstract: A stripper arrangement for a tool includes a stripper, a stripper shoe mounted on a lower side of a tool holder of a tool and having an opening for receiving the stripper so that the latter can be inserted into the opening by movement in a plane transverse to the axis of the tool, a retaining member displaceable between an operative position in which it engages and retains the stripper and an inoperative position in which it does not engage the stripper, and a spring urging the retaining member to the operative position. An auxiliary tool for replacing the stripper has an abutment face arranged to abut against a lower side of the stripper, and a projection extending toward the stripper and arranged to displace the retaining member to its inoperative position so as to disengage the retaining member from the stripper. The auxiliary tool may also clamp the stripper for removal or insertion of the latter.

Abstract: A punch and retainer assembly wherein the punch has a non-circular punching end and a flattened surface at the upper end of its side wall. The punch also has an axially extending, radially inwardly inclined flat surface below the flattened side wall portion. The punch retainer includes a vertically movable latch having cylindrical surfaces adapted to engage the flat inclined surface on the punch and a flat inclined surface on the retainer in wedging relation to retain the punch within the retainer. Means are provided for permitting the punch to be inserted into the retainer only when the flattened surface thereof is aligned parallel with the axis of the latch. A strong leaf spring biases the latch downwardly into engagement with the flat inclined surface on the punch so that the cylindrical surface of the latch engages the flat inclined surface on the punch with line contact that is perpendicular to the vertical axis of the punch.

Abstract: The present invention is directed to a chuck for use in a motor driven tool. The chuck is internally mounted within a transverse opening which intersects a longitudinal opening in the output shaft of the motor driven tool and includes an internal, transversely mounted hardened roller which locks a tool bit in the motor output shaft only when a torque or resistance is applied to the tool bit. The torque or resistance creates a twisting moment applied about the axis of the tool bit to lift the roller into engagement with an interior portion of the transverse opening to thereby lock the bit relative to the motor driven tool. In the quiescent state the tool bit is unlocked and may be readily removed from the motor driven tool or inserted at almost any given angle. The motor output shaft and associated bearings provide essentially the entire structural support for the tool housing.

Abstract: A punch and retainer assembly wherein the punch has a flattened surface at the upper end of the side wall thereof and a radially inwardly extending recess directly below the flattened side wall portion. The punch retainer includes a vertically movable latch adapted to engage within the recess on the shank of the punch and retain the punch within the retainer block. Means are provided for limiting vertical movement of the latch so that the punch can be inserted into the retainer only when the flattened surface thereof is aligned parallel with the pivot axis of the latch.

Abstract: An improved lock assembly is utilized to hold a tool in a socket of a machine tool. The lock assembly includes a carriage which is movable toward and away from the socket along a path extending perpendicular to a central axis of the socket. A retaining member is pivotally supported on the carriage. Movement of the carriage toward the socket moves the retaining member from a disengaged position in which it is spaced apart from a tool disposed in the socket to an engaged position in which the retaining member abuts the tool and presses it firmly into the socket. As the carriage moves toward the socket, the retaining member rotates relative to the carriage from the disengaged position in which it is disposed at an oblique angle to the central axis of the socket to the engaged position in which it is more closely parallel to the central axis of the socket.

Abstract: One end of an oscillating saw blade has a notch, and spaced from the notch is a hole through the blade. The head of the tool has a slot having a shaft extending through the rear end of the slot for receiving the notch. A pin extends partially into the slot for receiving the hole. A closer in the form of a cam is cammed into and out of the slot for moving the hole on the blade onto the pin and moving the end of the blade having the hole and the notch against the bottom of the slot. The cam closer is locked in place to lock the blade in the slot. A handle is attached to the cam closer for manually rotating the cam, and the cam has an overcenter orientation where the resilient forces from the blade pushing on the cam tend to rotate the cam to a closed position. A stop is provided to intersect the handle and stop it in its locked position. A jaw of resilient material may be provided between the blade and the bottom of the slot to spread forces from the cam on the blade.

Abstract: A drift advancing machine or the like having a cutting head with replaceable bits. Each bit is disposed in a sleeve-shaped bit holder fixed to the cutting head. Arranged at an oblique angle to the axis of each bit is a pivotal locking bolt having a first pivotal position wherein it engages a recessed portion of the bit and prevents removal of the bit, and a second pivotal position wherein it is out of engagement with the recessed portion of the bit and allows removal of the bit. The front end of the locking bolt is shaped particularly for engagement with the bit recessed portion.

Abstract: A small housing which may be held in the hand of a surgeon has an open ended socket into which a rotary bur assembly may be inserted and latched in place. A driven gear on the rotary bur assembly meshes with a driving gear at the end of the socket. The rotary bur assembly includes a sleeve supporting the bur on axially spaced bearings, and the sleeve has an external annular shoulder. A latch moves through a side window in the housing to engage the annular shoulder to hold the gears in proper mesh, and a spring prevents accidental disengagement of the latch.

Abstract: A knife having a handle adapted to interchangeably receive in releasable interlocking relationship a variety of blade configurations. Each blade includes an arcuate tang dimensionally adapted to be telescopically received in a mating arcuate slot in the handle. Included in the handle are locking devices for releasably engaging the tank in the slot.