Tools – Wrench – screwdriver – or driver therefor – Machine
Patent
1993-12-20
1995-12-05
Smith, James G.
Tools
Wrench, screwdriver, or driver therefor
Machine
81 5713, B25B 1700
Patent
active
054718988
ABSTRACT:
A wrench for driving sockets is provided in the form of a breaker bar with a 90 degree torque rotation head. The wrench includes an elongate handle including a hand grip and a head portion including a cylindrical cavity and a longitudinal bore with an axis parallel to the handle. An intermediate cylindrical barrel is fixed to the head portion and also includes a central longitudinal bore. A central spindle is fixed to the handle and rotates within the cylindrical barrel and the head portion. Fixed to the end of the central spindle is a driving member. A driven member, rotated 90 degrees from the first, is fixed to a rotatable post. The post has a cylindrical portion, a rectangular solid portion for selectively receiving a socket wrench head, and a neck portion. The driven member engages the driven member preferably by way of a ball-driven arrangement such that rotation of the central spindle is translated to the post. Also included is a bearing block disposed within the cylindrical cavity of the head portion and having a cylindrical portion with a top face for providing a bearing surface for the driven member and a flat face for providing a bearing surface for the driven member. The bearing block also includes a central bore for receiving and journalling the cylindrical portion of the post. A journalling washer is also included for receiving and journalling a top surface of the driven member and the neck portion.
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patent: 4474089 (1984-10-01), Scott
patent: 4643052 (1987-02-01), Badiali
patent: 4907476 (1990-03-01), Singleton
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