Positioning device for rotary wrench

Details Positioning device for rotary wrench Positioning device for rotary wrench

2011-07-12

2011-07-12

Thomas, David B (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Handle or shank

C081S177700

Reexamination Certificate

active

07975575

ABSTRACT:
A rotary wrench includes a handle having a clamping portion with two arms. Each arm includes a holding portion having a hole. At least one of the holding portions includes a positioning section. Two axles are respectively formed on two sides of a head and rotatably engaged in the holes. At least one of the sides of the head includes a positioning portion releasably engagable with the positioning section so that the head is rotatable relative to the handle about an axis and positionable relative to the axis in one of a plurality of angular positions surrounding the axis. An adjusting member is mounted to the arms and operable to adjust the spacing between the arms to move the arms between a clamping position clamping the head and a releasing position not clamping the head.

REFERENCES:
patent: 648572 (1900-05-01), Patterson
patent: 820292 (1906-05-01), Dunbar
patent: 1331956 (1920-02-01), Cross
patent: 2608894 (1952-09-01), Miller, Jr. et al.
patent: 2977824 (1961-04-01), Rueb
patent: 7246544 (2007-07-01), Lee
patent: 2006/0201288 (2006-09-01), Chen
patent: 2007/0163402 (2007-07-01), Hsieh

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