Tools – Wrench – screwdriver – or driver therefor – Attachment – or including adjunct or replaceable portion
Patent
1989-04-04
1990-03-06
Schmidt, Frederick R.
Tools
Wrench, screwdriver, or driver therefor
Attachment, or including adjunct or replaceable portion
81423, B25B 1358
Patent
active
049055500
ABSTRACT:
The utility of attachments for wrench jaws which provide gripping surfaces which will not injure highly polished surfaces to which the wrench is gripped. An attachment for wrench jaws is disclosed wherein the attachment comprises a unitary piece capable of being received over a plurality of wrench jaws and wherein the surface to be applied to the surface to be rotated by the wrench is serrated in the same fashion as the jaws of the wrench. The unitary piece further being held in position by the serrations of the wrench itself being applied against the inner surface of the attachment piece.
REFERENCES:
patent: 911924 (1909-02-01), Vader
patent: 1706427 (1929-03-01), Wachsmuth
patent: 2725774 (1955-12-01), Tekse
patent: 3083599 (1963-04-01), Slagle
America Machinist, p. 89, May 11, 1944.
Robert F. Albrecht, Inc.
Schmidt Frederick R.
Shideler Blynn
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