Tools – Wrench – screwdriver – or driver therefor – Double-ended – simultaneous adjustment
Patent
1980-04-23
1982-04-20
Smith, James G.
Tools
Wrench, screwdriver, or driver therefor
Double-ended, simultaneous adjustment
81128, B25B 1310, B25B 1318
Patent
active
043252753
ABSTRACT:
An adjustable open-end and box-end wrench (10) is provided as including an improved mounting arrangement for a pair of jaws (20) of the open-end of the wrench. A pair of longitudinally spaced pins (40) on a housing (16) of the wrench are respectively received within a pair of skewed slots (42) in each jaw so as to provide opening or closing lateral movement of the jaws upon longitudinal movement thereof within the housing. An adjusting member (24) having an engagement surface (26) that cooperates with a box structure (22) to provide the box-end of the wrench is connected to the jaws (20) and selectively secured by a lock mechanism (18) to lock both ends of the wrench in any adjusted position. In one embodiment, a slideway (54) on the housing (16) mounts the adjusting member (24) for pivotal movement about a lateral axis so as to engage and disengage a pawl (56) and ratchet (58) between the housing and the adjusting member to selectively provide the locking. In another embodiment, an adjusting nut (80) receives threads (82) on the adjusting member (24) and is received within an opening (83) in the housing for rotation that provides the adjusting movement. In both embodiments, the wrench housing (16) includes flared ends (46) on side walls thereof with flared slide surfaces (48) engaged by slide surfaces (50) on the outer jaw ends so as to provide jaw support during use.
REFERENCES:
patent: 1561812 (1925-11-01), White
patent: 1585825 (1926-05-01), Bessolo
patent: 1781994 (1930-11-01), Wilson
patent: 2486523 (1949-11-01), Deschenes
patent: 2814226 (1957-11-01), Lojcyc
patent: 3673896 (1972-07-01), Vardaman
patent: 4065986 (1978-01-01), Meggs et al.
patent: 4151763 (1979-05-01), Colvin
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