Wrench with reinforced hollow handle

Details Wrench with reinforced hollow handle Wrench with reinforced hollow handle

2011-03-01

2011-03-01

Meislin, D. S (Department: 3727)

Tools

Wrench, screwdriver, or driver therefor

Handle or shank

C081S177400, C081S492000

Reexamination Certificate

active

07895923

ABSTRACT:
A wrench with a reinforced hollow handle includes a head portion, a hollow handle portion, and a neck portion between the head portion and the handle portion. The handle portion includes a front portion having a wall thickness greater than a wall thickness of a rear portion and includes a necking portion between the front and rear portions having a wall thickness greater than the wall thickness of the rear portion and smaller than the wall thickness of the front portion. The handle portion further includes an open rear end defining a rear end opening at the rear portion thereof. Furthermore, in order to avoid depression of the handle portion resulting from a holding force, the handle portion is made having hardness above 30 HRC.

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