Pneumatic hammer drill having vibration damping end cap

Details Pneumatic hammer drill having vibration damping end cap Pneumatic hammer drill having vibration damping end cap

2006-05-19

2008-08-19

Nash, Brian (Department: 3721)

Tool driving or impacting

Impacting devices

With impact cushioning means

C173S169000, C173S162100, C173S162200

Reexamination Certificate

active

07413030

ABSTRACT:
A pneumatic hammer drill includes a handle body, a pneumatic cylinder, a piston, a tool, and a damping member. The handle body has an upper part that defines a front cavity and that has a rear end. The pneumatic cylinder has a cylinder rear end fitted in the front cavity, a front tool-connecting end, and a pressure chamber. The piston is disposed slidably in the pressure chamber. The tool is inserted into the pressure chamber through the front tool-connecting end. The damping member is made of a vibration-damping material, and is attached to the rear end of the handle body.

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U.S. Appl. No. 11/522,325, filed Oct. 24, 2006.
U.S. Appl. No. 11/430,956, filed May 10, 2006.

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