Tools – Wrench – screwdriver – or driver therefor – Handle clutched to head
Patent
1984-11-02
1987-02-24
Olszewski, Robert P.
Tools
Wrench, screwdriver, or driver therefor
Handle clutched to head
81 60, B25B 1346
Patent
active
046448306
ABSTRACT:
A closed or open end ratchet wrench head comprising a substantially hollow cylindrical body with a plurality of recesses or pockets formed therein in communication with the central opening of the cylindrical body. A plurality of flexible, swinging pawls that acts as jaw members are located in the recesses and extend into the central opening of the body for direct contact with a nut or bolt head. The recesses and pawls are shaped to retain the pawls within the recesses while permitting the pawls to flex as required during ratching movement. The flexible pawls eliminate the need for separate hardened steel pawls and springs. In an alternate embodiment, the pawls comprise hardened metal slugs extending into the central opening from peripheral recesses tangentially in communication with the central opening. The pawls are urged into the central opening by separate springs within the recesses. The pawls engage the nut flats with area contact and are supported with area contact by thrust walls in the wrench head recesses. In a second alternate embodiment channel or "C" shaped hardened metal pawls extend partially into the central opening from peripheral recesses. The recesses and pawls are shaped to retain the pawls within the recesses while permitting the pawls to swing or rotate during ratcheting movement.
REFERENCES:
patent: 1756717 (1930-04-01), Wiedeke
patent: 2659257 (1953-11-01), Thompson
patent: 2700315 (1955-01-01), Hermanson
Bailey Ben J.
Bailey Roy E.
Deimen James M.
Meislin Debra S.
Olszewski Robert P.
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