Patent ID: 6595088
Filing Date: 2003-07-22
Classification: B25B

Abstract:
leverage-release type silent wrench structure comprised of:a ratchet wheel; said ratchet wheel having a tool end at its center that is inserted into an attachment: additionally, a groove formed around its circumference of said ratchet wheel; a torsion handle having a hinge section at one end that is situated next to said ratchet wheel, with a clutch block extending in a curve from one side of said hinge section; a toothed surface disposed along the curved inner side of said clutch block that provides for enmeshment with said ratchet wheel; a protective housing that encases the said ratchet wheel and the said torsion handle hinge section; a ratchet wheel positioning structure consisting of a locating hole formed in the center of said hinge section top surface and a pin insert therein, with the top end of said pin projecting into and firmly ensconced in said groove of said ratchet wheel to keep said ratchet wheel from dropping out of said protective housing; a linkage component that pivotably conjoins said protective housing and said hinge section of said torsion handle and, furthermore, such that said linkage component serves as a center point of rotation of said torsion handle; wherein pulling said torsion handle with said linkage component serving as the center point of said torsion handle causes its said clutch block to move against said ratchet wheel such that said toothed surface enmeshes said ratchet wheel, enabling said torsion handle to initiate the rotation of said ratchet wheel, and thereby rotate a work object; pulling said torsion handle in the opposite direction causes the separation of the said toothed surface of the said clutch block from said ratchet wheel, enabling said torsion handle to be rotated back to its initial starting position in a disengaged state around said linkage component at the center point.