Title:
HIGH TORQUE WRENCHING SYSTEM
Document Type and Number:
WIPO Patent Application WO2000045057
Kind Code:
A9
Abstract:
A high torque wrenching system having a wrench (20) with asymmetrical torque transmission capability. The wrench includes a plurality of protuberances (32) and a plurality of recesses (50) around a central axis (A). The fastener (30) also includes a plurality of protuberances (33) and recesses (51) around the central axis for mating with the wrench. The protuberances and recesses form a saw tooth shape. Each tooth or protuberance is formed by a first wrenching surface (36) for loosening the fastener and a second wrenching surface (38) for tightening the fastener. The wrenching surface carrying the loosening load is at a much smaller angle with respect to a radial vector (R) extending from the wrench's central axis than the wrenching surface carrying the tightening load. The result is that the loosening torque vector will have a much greater moment arm.
Inventors:
WRIGHT RICHARD B
Application Number:
PCT/US2000/002147
Publication Date:
November 29, 2001
Filing Date:
January 27, 2000
Export Citation:
Assignee:
WRIGHT TOOL CO (US)
International Classes:
B25B13/06; B25B15/00; F16B23/00; (IPC1-7): F16B23/00; B25B15/00; B25B23/14; B25B23/15; F16B31/02
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