Ratcheting screwdriver
AssigneeBeere Precision Medical Instruments, Inc.
InventorClair L. Tiede
Life of this patent
Estimating the term…
Abstract
A ratcheting mechanism utilizing a driven central gear and two pawls which are movable into and out of driving relation with the gear. An actuating mechanism moves the pawls out of driving relationship, and a resilient member is employed for urging the pawls into contact with the gear. An elastomer covered handle is connected with the mechanism for optimum gripping.
Claims1
A ratcheting screwdriver, comprising a handle having a cavity with a cavity-defining wall which has two arcuately shaped pockets defined by two arcuate surfaces and which has two end walls respectively spaced from and facing said two arcuate surfaces, a gear rotatably disposed in said handle adjacent said cavity, two pivotal pawls with each having an arcuate portion with an arcuate surface respectively disposed in each of said pockets in respective pivotal support with said two pocket arcuate surfaces and having teeth adjacent said gear and being pivotal into and out of tooth engagement with said gear and with said pawl teeth being on an end of said pawl distant from said arcuate portion thereof, said pawls normally being in engagement with said gear, said respective distant ends of said pawls being in pivotally sliding confined relationship relative to said two end walls, a control movable on said handle and having a portion spaced from said pawls and arranged for engagement with said pawls for moving said pawls out of tooth engagement with said gear for drive disengagement, and resilient means disposed in the path of pivot of said pawls for urging said pawls toward said gear.
Dependencies are inferred from the claim text.