Ratchet wrench having ratchet teeth of higher strength

Details Ratchet wrench having ratchet teeth of higher strength Ratchet wrench having ratchet teeth of higher strength

1995-04-03

1996-07-09

Kisliuk, Bruce M.

Tools

Wrench, screwdriver, or driver therefor

Handle clutched to head

81 63, 81 60, 192 43, 192 46, B25B 1346

Patent

active

055334270

ABSTRACT:
A ratchet wrench includes a ratchet wheel and a pawl engaged in a head portion. The ratchet wheel includes a number of curved and concave teeth formed in the outer peripheral surface, and the pawl includes a number of curved and convex teeth for engaging with the curved and concave teeth of the ratchet wheel so as to strengthen the engagement between the teeth. In addition, the teeth of the pawl are all engaged with the teeth of the ratchet wheel such that the engagement between the ratchet wheel and the pawl is further strengthened.

REFERENCES:
patent: 983562 (1911-02-01), Murray
patent: 3265171 (1966-08-01), Kilness
patent: 4485700 (1984-12-01), Colvin
patent: 4561329 (1985-12-01), Lack
patent: 5178047 (1993-01-01), Arnold et al.
patent: 5255576 (1993-10-01), Keith
patent: 5404773 (1995-04-01), Norville

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