This invention is about a device used for installing a fixing nut on the targeted objects-multiple fixing screw axes protruded from the hub or for separating them from the targeted object or the fixing screw axis in order to fix vehicle's tire wheel to the hub when installing or separating a fixing nut from targeted objects. Based on the idle operation of the operating gear, not based on the visual examination, the invention immediately recognizes the complete installation of a fixing nut. Likew...

A wrench has a body, a head and at least one pivotal device. The body has two arms separately formed on a distal end of the body and a mounting recess formed between the two arms. Each arm has a hole defined through the arm. The head is rotatably and replaceably mounted inside the mounting recess and has a driving hole defined through the head and two pivotal holes defined in the outer surface of the head and facing the holes in the body. The at least one pivotal device is movably mounted betwee...

A wrench includes a handle, a joint movably mounted on the handle and a working unit pivotally connected to the joint. The handle pivots relative to the working unit between a first position, where the handle and the working unit extend perpendicular to each other, and a second position, where the handle and the working unit extend along a same axis.

Open-end symmetrical wrenches retain fasteners fully seated in the jaws of the wrench. The jaws have fastener-engaging surfaces with substantially planar and parallel sections that extend past the front side corners of the fastener when it is fully seated in the wrench and serrated diverging sections extending outwardly and rearwardly from these planar sections. The serrated diverging section may be arcuate or a slightly inclined. Both types of diverging section are designed to reduce slipping a...

A wrench adapted to turn a rotatable workpiece or tool about its central axis. The wrench comprises an elongated handle received through a bracket having an inwardly facing surface that engages the workpiece or tool. A pivotal connection between the inner end of the handle and the bracket permits adjustment of the handle about a pivot axis perpendicular to the longitudinal handle axis. A flexible loop is provided as a work-engaging member. It has one end connected to the inner end of the handle ...

Disclosed is a wrench for which nuts and the like comprise a hub having a bore therethrough with first handle defined by or associated with the hub for providing torque to the hub. A rotatable shaft has a portion within the bore with fastener drive means connected to one end of the shaft and second handle means connected to the other end thereof. The shaft and hub have complementary engaging socket elements whereby the shaft may be selectively engaged to the hub for rotation therewith by the fir...

A wrench for holding one fastener element of a nut-and-bolt fastener against rotation while the other fastener element is turned to tighten or loosen the fastener. The wrench comprises a wrench plate having a plurality of different size openings for fitting fastener elements (e.g., the bolt) of different sizes, the wrench plate being engageable with an adjacent part when the other fastener element (e.g., the nut) is turned for holding the one fastener element against rotation, and a resilient ma...

A wrench for installing and removing a tip onto and from a tool comprises a rotary part and a locking hub. The tool includes a housing and a rotatable shaft which has a threaded bore. The tip includes a working portion and a threaded shank which is to be secured in the threaded bore of the shaft. The hub includes a projection which has a non-circular opening which engages a complementary surface on the shaft and a non-circular exterior surface which engages a complementary surface on the interio...

A wrench comprising a housing inside which a switch, a reversible motor and a torque transmitting mechanism are disposed. The reversible motor is controlled by the switch and serves as torque source with the power supplied by an external electric power source, such as an automobile electric system. The torqure transmitting mechanism comprises basically a drive shaft mechanically connecting to the motor spindle and a follower shaft which is coupled to the drive shaft by means of a drive member in...

A wrench includes two mutually movable jaws that are mounted by means of parallel linkages to a housing forming the handle. A rod is axially movable in the handle by means of an internally threaded sleeve extending into the bottom of the handle. The rod is connected at its top, by a pivotal link, to the top of the outer member of the parallel linkage. A locking member is pivotally attached to the housing and there is pivotally connected thereto, a wedge-shaped member that is adapted to engage a ...