Abstract: An adjustable click-type torque wrench comprising an elongate, tubular arm with front and rear ends, a work-engaging head on an axis normal to the axis of the arm, an elongate link projecting rearwardly from the head and freely into the arm, a first pivot means connecting the front end portion of the lever to the front end portion of the arm on an axis parallel with the axis of the head, an elongate link with front and rear ends within the arm, a second pivot means connecting the front end of the link to the rear end of the lever on an axis parallel with the first pivot means, an elongate annular fulcrum block engaged about the link between the ends thereof and shiftable circumferentially and longitudinally relative thereto and having an annular outwardly disposed bearing surface with diametrically opposite work load transmitting sides engaging diametrically opposite sides of the interior surface of the arm on a central radial plane of the link which is normal to the axis of said pins, the central axis of the

Abstract: A torque wrench comprising an elongate, straight tubular lever with open front and rear ends, a work-engaging head at the front end of the lever and having a lever arm projecting into and pivotally connected with the front end portion of the lever, an elongate crank projecting freely rearwardly into the lever, an elongate axially biased compression spring extending longitudinally in the lever rearward of the crank, cam means between the spring and the crank normally releasably holding the crank concentric in the lever and operating to allow the crank to pivot and strike a side of the lever when a predetermined set operating force is exerted between the head and the lever through and about the axis of the lever arm. The wrench next includes adjusting means to vary the bias on said spring to adjust the operating force. Said means includes a plug set in the lever rearward of the spring, an elongate screw is engaged through the plug. The front end of the screw engages the rear end of the spring.

Abstract: A pneumatically driven power torque wrench comprising an elongate frame with front and rear ends, a transversely extending drive shaft rotatably carried by the frame at the front end thereof; a ratchet drive to rotate the shaft and including a ratchet wheel on the shaft; a drive ring about the wheel; circumferential pawls between the wheel, the ring and an elongate lever arm projecting from said ring. The wrench further includes a cylinder and ram unit fixed to and extending between the lever arm and the rear end of the frame and a work-engaging tool carried by the shaft, at one end thereof, and engaging a fastener concentric therewith. The wrench next includes a reaction device to anchor the rear end of the frame against rotation about the axis of the shaft.

Abstract: An adjustable torque wrench including an elongate tubular lever arm, a work-engaging head at the front end of the arm, an elongate adjustable screw within and accessible at the rear end of the arm, a polygonal driver carried by the screw within the arm, a hand grip with a front section fixed about the arm and a rear section normally adjacent the rear end of said front section and rear end of the arm, an elongate drive sleeve on and projecting forwardly from the rear section into the arm and about the driver; said sleeve has a cylindrical opening in its rear portion to normally freely accommodate the driver and a polygonal opening in its front portion to establish driving engagement with said driver when the rear section is moved rearwardly; said rear section has a forwardly projecting annular skirt with circumferentially spaced axially extending grooves; said front section has a rear extension with circumferentially spaced axially extending ribs normally engaged in the skirt and the grooves; the rear end of t

Abstract: A torque limiting device engageable with and between a rotating power shaft and piece of work to be torqued, including a drive section connected with the power shaft and having a plurality of circumferentially spaced sockets, a driven plate with through openings normally registering with said sockets, drive balls normally engaged in and extending between the said openings and sockets, an elongate torque shaft with one end coupled with the plate and its other end connected with said work, a keeper plate overlaying the said openings in the driven plate to hold the balls engaged in said openings and sockets and having pockets normally circumferentially offset from said openings, a body, means connecting the body in predetermined rotative position with the torque shaft, spring means normally yieldingly maintaining the keeper plate in normal rotative position relative with the body, said pockets being circumferentially offset from said openings a distance equal to the circumferential deflection of the torque shaft

Abstract: A torque wrench tester comprising a single elongate deflection beam, a plurality of torque wrench engaging input shafts drivingly connected with the beam at points spaced longitudinally thereof and each to deflect the beam in response to a predetermined range of torsional forces applied thereto and a single dial indicator related to the beam to increase deflection thereof and having calibrations for each range of forces to be measured.

Abstract: A torque multiplier tool engageable between a torque wrench and a piece of work, said tool comprising a body with an elongate support engaging reaction arm to stop rotating of the body, a wrench engaging input shaft rotatably carried by the body, a work engaging output shaft rotatably carried by the body spaced from and parallel with the input shaft, an input pinion on the input shaft, an output gear on the output shaft, a pair of idler units including idler shafts rotatably carried by the body and carrying driven gears and drive pinions engaged with the input pinions and the output gear at circumferentially spaced points between which a number of whole teeth and one-half of one tooth of said input pinion and of said output gear occur, whereby driving engagement through the tool is established by four engaged driving teeth three-fourths of the time and by three engaged driving teeth one-fourth of the time.

Abstract: A drive socket with front and rear end portions defining front and rear ends, an elongate, forwardly opening polygonal work receiving socket and an elongate, rearwardly opening polygonal drive tool receiving opening, said drive socket defined by a multiplicity of flat radially extending sheet metal laminates in intimate juxtaposition and having registering openings in radial and circumferential spaced relationship about the axis of the drive socket, elongate tie members engaged through the registering openings with ends in stopped engagement with the front and rear ends of the drive socket, the laminates having central openings corresonding in configuration with the cross-section of the work receiving socket and drive tool receiving opening in their related portions of the drive socket.

Abstract: A torque wrench adapted to applying predetermined maximum torque onto related work comprising an elongate lever arm, a work engaging ratchet head including a body coupled to one end of the arm and adapted to be rotated by the arm, a spindle with a work engaging projection rotatable in the body and ratchet means between the spindle and body to establish driving engagement therebetween when the body is rotated in one direction by the arm, a manually controlled prime mover carried by the wrench in substantially fixed position relative to the body and transmission means between the prime mover and the spindle, said prime mover and transmission operable to selectively rotate the spindle in said one direction and in overriding relationship to the ratchet means, the torque delivered to the spindle by the prime mover being less than the predetermined maximum torque to be applied by the wrench on to related work.