Tools – Wrench – screwdriver – or driver therefor – Rigid jaws
Patent
1997-08-12
1999-11-16
Smith, James G.
Tools
Wrench, screwdriver, or driver therefor
Rigid jaws
811246, 811211, 81186, B25B 1300
Patent
active
059837586
ABSTRACT:
A wrench for rotating a fastener having a number of corners on a periphery thereof and method of making same is disclosed. The wrench includes a gripping member having an opening defined by an inner surface complimentary to the periphery of the fastener whereby the fastener may be axially received by the gripping member. The inner surface defines the plurality of circumferentially spaced shoulder portions wherein alternating shoulder portions engage a corresponding corner of the fastener. The shoulder portions define areas therebetween. Stopper portions are located in alternating areas between shoulder portions. The wrench has a first angular position where the stopper portions engage in upper surface of the fastener for restricting the passage of the fastener therethrough and a second angular position where the stopper portions do not engage the upper surface of the fastener thereby permitting the passage of the fastener therethrough.
REFERENCES:
patent: 2697371 (1954-12-01), Bowman
patent: 2751802 (1956-06-01), Reuillard
patent: 2774259 (1956-12-01), Caulkins
patent: 3604106 (1971-09-01), Borries
patent: 5255578 (1993-10-01), Liou
patent: 5307713 (1994-05-01), White
patent: 5782148 (1998-07-01), Kerkhoven
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