A wrench has a roller motion transmission mechanism that changes reciprocating motion of a driving member to unidirectional rotational motion of a driven member. The wrench as a head with an inside cylindrical wall surrounding a body with a plurality of protrusions. Each protrusion has a ramp inclined toward the cylindrical wall. A wedging member comprising a cylindrical roller engages each ramp and inside cylindrical wall of the head. A cage anchored to the protrusions retains the wedging members in engagement with the ramps and the inside cylindrical wall of the head.

A ratchet wrench with a pushrod includes a base body, a ratchet and the pushrod. The base body includes a driving portion and a sliding path. The driving portion is disposed at one end of the base body, and includes a receiving space. The ratchet is disposed in the receiving space, and includes a continuous tooth-shaped structure. The pushrod is disposed in the sliding path, and includes two tooth portions and a pushrod cross section. One of the tooth portions is engaged to the continuous tooth-shaped structure. The pushrod cross section includes a first cross section and a second cross section. The first cross section is a rectangular shape. The second cross section is an arc shape and connected to the first cross section. The pushrod cross section has a first horizontal length and a first vertical length. The first vertical length is greater than the first horizontal length.

A ratchet wrench includes a hole in which a driving member and a pawl are received. The pawl is engaged with toothed face of the hole of the head. The driving member has a protrusion. An operation rod extends through the driving member and connected with a positioning unit. A bead is movably received in the protrusion of the driving unit and cooperated with an operation rod. When pushing the positioning unit, the operation rod is moved and the bead is submerged in the protrusion to release or to connect with a socket to the protrusion. The pawl includes a slot that extends in the radial direction of the hole in the head. A control member is rotatably engaged with the hole and includes a stud inserted into the slot. A resilient member is located in the slot and biased between the stud and the inner end of the slot.

Disclosed is a wrench, which is used for wrenching a workpiece and comprises a unidirectional transmission mechanism. The unidirectional transmission mechanism comprises rollers, a first member and a second member at least partially sheathed in the first member. The first member is fixedly provided at a wrenching portion of the wrench, and the second member is used for mating with the workpiece. The directions of the rotating torque from the wrenching portion are a first direction and a second direction along the axis of rotation of the first member. With regard to one of the rotating torque of the first direction and the rotating torque of the second direction, the second member is stationary relative to the first member so as to output the rotating torque to the workpiece; and with regard to the other one thereof, the second member rotates relative to the first member without outputting the rotating torque to the workpiece. The torque of the unidirectional transmission mechanism can meet the demand of using a wrench, and at the same time, the unidirectional transmission mechanism remains silent in use and has the characteristic of wear resistance of bearings.

An adjustable ratchet wrench is provided that includes a base plate and a top plate rotatably coupled to the base plate. A plurality of grippers may form an interior polygonal shape within a center of the base plate and the top plate for gripping a workpiece. A plurality of push rods coupled to the grippers may move the grippers to change the size of the interior polygonal shape as the top plate is rotated with respect to the base plate.

A tool adapter to aid in the removal of a threaded fastener from an article using a drive insert, the tool adapter comprising: (i) a housing comprising a plurality of faces interconnected along one or more respective edges of the plurality of faces to form the housing; and (ii) one or more holes recessed into one or more of the plurality of faces, the one or more holes adapted to receive one or more tools, wherein a first mating end of the drive insert is received into one of the one or more holes of the tool adapter and a second mating end of the drive insert is connected to the threaded fastener; and wherein one or more tools are inserted into at least one of the remaining holes to provide sufficient torque to remove the fastener from the article.

A non-deforming structure of a wrench contains: a handle and at least one driving head arranged on at least one end of the handle. The handle includes an elongated body having four corners, a first length, a handle width, a handle thickness, and four elongated recesses. The handle width is 1.4 time to 2.6 time more than the handle thickness. Each elongated recess has a second length, a largest width, and a largest depth. Each of the largest width and the largest depth of each elongated recess shrinks from an intermediate portion thereof to two ends of each of the largest width and the largest depth until connects with each corner. The second length takes up at least of the first length, the largest width takes up 2/9 to 4/9 of the handle width, and the largest depth takes up 2/9 to 4/9 of the handle thickness.

A spiral ratchet driver with crank and slider mechanism comprises a spiral ratchet driver having a shank housing, a journal having a hole, connected to the shank housing by a screw, a ratchet mechanism assembly connected adjacent to the journal, a shank received in the shank housing and the ratchet mechanism assembly, a spindle having a spindle bearing connecting the second end of the shank to a chuck or a square drive, a lever connecting bar connected to the hole of the journal by means of a first rivet, a lever having a lever handle cushion grip, rotatably connected with the lever connecting bar, a handle bar having a handle bar grip on a free end, connected with the lever below the handle grip and connected with the spindle from a fixed end, a journal housing covering the journal, is connected with the handle bar and four or more bearing slides disposed between journal and the journal housing.

A ratchet wrench for rotating a workpiece with a top side includes a wrench body and a ratchet. The wrench body has a working end. The working end has a first end face and a second end face opposite to each other. The working end is disposed with a through hole. The ratchet is disposed in the through hole and formed with a first tool trough and a second tool trough communicating with each other. The first tool trough is arranged corresponding to the first end face and has a first blocking face. The second tool trough is arranged corresponding to the second end face and has a second blocking face. The workpiece is optionally received in the first tool trough or the second tool trough to make the top side abut against the first blocking face or the second blocking face.

A ratchet wrench (1) has a flexible clutch ring (500) that forms the mid part of a laminate-like structure comprising a wrench head (200), the clutch ring (500) and a drive element (40). When under load, the compression forces applied to the clutch ring (500) are substantially dissipated around its circumference (508) and inner surface (509), this inward force clamping upon the inherently strong drive outer surface (45). The laminate-like construction enables a reduction in the width or depth of the wrench head without a loss in strength.