Tools – Wrench – screwdriver – or driver therefor – Handle or shank
Patent
1998-09-01
2000-03-14
Scherbel, David A.
Tools
Wrench, screwdriver, or driver therefor
Handle or shank
8117785, B25B 2316
Patent
active
060357479
ABSTRACT:
An extension bar that has a cylindrical hollow shaft that has two solid ends for use with socket type wrenches. At one end, a solid piece of metal is machined to a post to receive the socket. At the other end, the solid member has a recess formed in it to receive the post of the socket wrench. Unlike the extension bars available today, the recess for the socket wrench does not penetrate into the hollow shaft. This construction, unlike the others, prevents the extension from twisting when torque is applied by the wrench. Instead of having to overcome the twisting force before torque is applied to a fastener, the torque is transmitted directly to the fastener. This type of extension bar can be made in any length, even three or four feet. Even at those lengths, the extension does not twist. As a result, repair operations are faster and safer.
REFERENCES:
patent: 4056020 (1977-11-01), Coviello
patent: 4344340 (1982-08-01), Erickson
patent: 4703677 (1987-11-01), Rossini
patent: 4733584 (1988-03-01), Karge
patent: 4781085 (1988-11-01), Fox, III
patent: 4960015 (1990-10-01), Mathews
patent: 5291809 (1994-03-01), Fox, III et al.
patent: 5477434 (1995-12-01), Reed
patent: 5720207 (1998-02-01), Milner et al.
Danganan Joni B.
Scherbel David A.
Tavella Michael J.
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