A ratchet wrench includes an annular head, a driving unit, a control unit, a rotary member, a second body, a bead and an end piece. The annular head receives the driving unit therein and a shaft extends from the annular head. The driving unit has a top part and a bottom part, between which a first toothed ring, a first pawl, two second pawls, a third pawl and a second toothed ring are pivotably located. The rotary member is rotatably inserted into an axial hole of the shaft and has third teeth, a recess and an engaging groove. The third teeth are engaged with the first and second toothed rings. A bead biased by a spring located in the shaft and is engaged with the engaging groove. The recess of the rotary member is connected with the second body.

The ratchet wrench comprises a functional head (1) and a handle (2) hingedly connected to each other, a ratchet toothed wheel (4) rigidly attached to the functional head (1), a movable ratchet pawl (5) installed on the handle (2), a working spring (6) that biases the ratchet pawl (5) against the ratchet wheel (4), a movable releasing member (7) installed on the handle (2) and manually operable to move the ratchet pawl (5) to a position out of engagement with the ratchet wheel (4), and a movable locking element (69) installed on the handle (2) and manually operable between a rest position, in which it does not interfere with the ratchet pawl (5), and a locking position, in which it comes into contact with the ratchet pawl (5) holding it in said engaged position with the ratchet wheel (4).

A ratchet wrench includes an annular head, a driving unit, a control unit, a rotary member, a second body, a bead and an end piece. The annular head receives the driving unit therein and a shaft extends from the annular head. The driving unit has a top part and a bottom part, between which a first toothed ring, a first pawl, two second pawls, a third pawl and a second toothed ring are pivotably located. The rotary member is rotatably inserted into an axial hole of the shaft and has third teeth, a recess and an engaging groove. The third teeth are engaged with the first and second toothed rings. A bead biased by a spring located in the shaft and is engaged with the engaging groove. The recess of the rotary member is connected with the second body.

A ratchet wrench includes a tubular body, a ratchet unit, a driving head, a control unit and a connection unit. The ratchet unit is operated in either rotation mode or spinning mode. The control unit controls the ratchet unit to rotate clockwise or counter clockwise. The connection unit is connected with a tool. When the body is rotated, the ratchet unit drives the driving head to rotate an object connected to the driving head. When the tool is span relative to the body, the ratchet unit also drives the driving head to rotate an object.

A clench wrench includes a structure defining a handle and an engaging head. The engaging head has a front side and a back side and includes an engaging space extending through the front and back sides. The engaging space defines an opening on both the front and back sides. A clenching device is mounted on the engaging head and includes a clenching member. The clenching member includes a clenching portion and is operable in a first mode in which the clenching portion is located at a first position capable of clenching the object engaged with the engaging head, and in a second mode in which the clenching portion is disposed away from the engaging space and is located at a second position capable of letting the object engaged with the engaging head disengage therefrom.

Surgical instruments and devices including drivers, inserters, and reducers. The driver includes a ratcheting mechanism configured to provide uni-directional motion when engaged. The inserter includes a rack, pinion, and cam system designed to secure an implant and release an implant in-situ. The reducer includes a geared system for persuading together surgical components and aligning misaligned vertebrae.

A wrench extender comprises an extension member, a handle, and an adjustable device, which includes two ratchet wheels disposed between the extension member and the handle, and a biasing member biasing between the two ratchet wheels. The two ratchet wheels are selectively adjusted between a closed position where the two ratchet wheels are abutted against each other and a separated position where the two ratchet wheels are separated and located away from each other. Each ratchet wheel is provided with a third ratchet portion on an outer periphery thereof, wherein the third ratchet portions of the two ratchet wheels are selectively engaged with the first ratchet portion of the extension member in the closed position or simultaneously engaged with the first and second ratchet portions in the separated position.

Surgical instruments and devices including drivers, inserters, and reducers. The driver includes a ratcheting mechanism configured to provide uni-directional motion when engaged. The inserter includes a rack, pinion, and cam system designed to secure an implant and release an implant in-situ. The reducer includes a geared system for persuading together surgical components and aligning misaligned vertebrae.

A ratchet driving mechanism for a hand tool includes: a drive unit, including a drive shaft, a position member and a plurality of latch members, wherein each of the latch members includes a latch plate and an elastic piece; an adjustment ring, sleeved on the drive shaft and formed with a plurality of cavities allowing the position member to be selectively latched and positioned and an accommodation slot allowing each of the latch plates to inwardly/outwardly move; and a ratchet unit, sleeved on the drive shaft and formed with a plurality of ratchet teeth allowing each of the latch plates to be engaged. Accordingly, during the drive shaft driving the ratchet unit for generating rotation, the position member is able to precisely position the ratchet unit on drive shaft.

A box-end tool structure includes a first body, a second body, two third body modules, and a fourth body. The first body is provided with a first end, a second end, two first receiving grooves, a first face, two second faces, and a first slot. The second body is mounted on the first body and provided with a first mounting portion and two third faces. The two third body modules are moved in the first slot linearly and simultaneously to be close to or away from the second body. One of the third body modules is mounted on the first end, and the other one of the third body modules is mounted on the second end. Each of the third body modules includes a first locking member, a second locking member, a first elastic member, and a first push member.