Open end adjustable spanner

Details Open end adjustable spanner Open end adjustable spanner

2007-03-13

2007-03-13

Wilson, Lee D. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Handle clutched to head

C081S058300, C081S063100, C081S177800

Reexamination Certificate

active

10975423

ABSTRACT:
A new mechanism of an open-end adjustable spanner which includes a right latch, a left latch, a return spring, and a control member containing hairpin springs and a serrated bit installed in an accommodation trough of a handle to create a torque transmission structure to turn a ratchet by gearing to permit easy alignment of the ratchet with the bolt or nut and avoid slipping therefrom before and after tightening or loosening the bolt or nut; and allow effort-saving and convenient torque application in clamping head of a bolt or nut by selecting a proper specification of the configuration of the open end of the ratchet.

REFERENCES:
patent: 2521419 (1950-09-01), Sellers
patent: 3171643 (1965-03-01), Roos
patent: 5454283 (1995-10-01), Stefano
patent: 5501124 (1996-03-01), Ashby
patent: 5775184 (1998-07-01), Cole
patent: 6139476 (2000-10-01), Gallant
patent: 6151993 (2000-11-01), Shiao
patent: 6155140 (2000-12-01), Tsai
patent: 6318215 (2001-11-01), Armfield, IV
patent: 6330840 (2001-12-01), McCormick et al.
patent: 6810773 (2004-11-01), Trucchio
patent: 6948405 (2005-09-01), Simmons
patent: 2002/0162422 (2002-11-01), Kerzhner

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