Abstract: The application relates to a chuck (10) with a coupling and a housing (34) for clamping cap-screws and/or studs having a screw spindle (11), a drive spindle (12) fixed axially in relation to the screw spindle (11) with at least one spring-loaded and axially movable coupling (18) which can be drivably secured to the screw spindle (11) by a counter-component (59) and a spring-loaded, axially movable adjusting sleeve (22) which can render the coupling inoperative. The coupling (18) has at least one projection or recess (6) which can be functionally engaged with a mating recess or projection on the counter-component (59).

Abstract: A drive of a drill chuck having a torque coupling which can be placed on a drive shaft of a motor via a base element on a side opposite of chuck jaws. A torque coupling having meshing ball bearing collars is inserted between the base element and the chuck jaws. A spring-loaded driven end of the torque coupling is connected with the base element and a take-off end of the torque coupling is connected with a jaw housing which guides the chuck jaws, each being fixed against relative rotation. A ring abutment for the spring-loaded driven end is fixed on the base element. A cylindrical sleeve projects from the ring abutment in a direction toward the chuck jaws, which are rotationally movable. The cylindrical sleeve overlaps a fitted cylindrical pipe which is positioned on the jaw housing and encloses the torque coupling.

Abstract: A mounting device for mounting a nut to a plate is disclosed. The plate is formed with a pair of spaced lugs projecting at right angles from the plate. The mounting device is in the shape of a U-bar having a base and a pair of spaced arms extending at right angles from the base. A pair of spaced resilient clamping tongues extend at acute angles from the base. A slot is defined between an end of each tongue and an adjacent edge of the base. One of the lugs is held in each slot by the clamping effect of the associated tongue.

Abstract: A torque transmission clutch which disengages automatically on increase of torque beyond a particular value comprises a pair of like discs mounted to rotate with a drive shaft and a driven shaft respectively, each disc having through-extending apertures accommodating a ring of balls. The balls are all the same size and the number of balls in each ring is the same. The disc thickness is equal to the ball radius and the discs are held axially in a sleeve with a spacing equal to the ball radius. One ring of balls abuts a thrust disc located axially on one shaft and the other ring of balls is pressed by a spring-loaded thrust disc to interengage with the balls of the one ring in the space between the ball-retaining discs. On occurrence of excessive torque, the spring-loaded ring of balls is deflected axially and rides over the balls bearing against the axially-located ring.

Abstract: A chuck for a hand or automatic tool has a shank adapted for torque-transmitting engagement with the head of a screw or like component which is to be inserted in a workpiece and a plurality of locking elements, such as balls, radially displaceable from an inoperative position to prevent inadvertent release of the component from the chuck.

Abstract: A stud which, by being inserted through holes in structural or like building members, joins them together, includes two parts which can be moved relatively over contacting, planar side surfaces, at least one of the parts having lateral facing portions for embracing the members to hold them together, and the stud parts being held together after insertion through the holes by releasable, and preferably resilient, means allowing, after release, removal of the stud from the holes.

Abstract: A fastener device for detachably connecting panels with aligned round holes includes a retainer having a head portion and an offset foot portion interconnected by a cylindrical shank, and a lock bushing mounted on the cylindrical shank to engage the panels whereby rotation of the head portion displaces the foot portion which engages the opposite side of the panel.