Ratcheting torque wrench

摘要

A disposable ratcheting device and method is disclosed, which may include a shaft extending axially through at least a shank. The shank also provides a cup or chamber wherein a series of drive bodies reside in a movable fashion. The shank is placed in a body having an inner wall with teeth formed radially, The drive bodies have toes protruding beyond the shank and which, in a locked direction, engage the teeth inside the body.

主权项

1. A torque-limiting ratchet driver comprising:
a body (6) having a handle (4) and an inner annular wall (402); an upper clutch shank (800) with gear teeth (83) on one side and an annular wall (90) around a periphery on the opposite side forming a peripheral wall of drive body guides; a lower shank (700) having a drive socket (9) on one side and gear teeth (83) on the opposing side; a nut (25); a spacer (20); a spring (22) with an outer and an inner diameter between the upper cylindrical shank and a ribbed nut, wherein the spring is configured to apply a force across the upper clutch shank and the lower shank; a shaft (14) having a workpiece-engaging tip (12) and a drive connection (16) engaged within the drive socket of the lower cylindrical shank, the shaft extending axially through the lower shank, the upper clutch shank, and the spring and connected to the nut; a plurality of ratchet teeth (405) formed or molded on the inner annular wall; one or more of movable drive bodies (300) mounted to the upper clutch shank with a toe (303) that protrudes through a passageway (200) beyond the annular wall to engage a ratchet tooth when rotated in a positive lock direction; wherein the upper shank and the lower clutch shank engage for relative rotation, and wherein the upper clutch shank and the lower shank disengage when a predetermined torque limit is exceeded; and, wherein the upper shank and the lower clutch shank move in the a reverse direction without imparting torque.