Rock hammer

Details Rock hammer Rock hammer

2005-02-01

2005-02-01

Thomas, David B. (Department: 3723)

Tools

Hammer

Having shock absorbing means

C081S020000

Reexamination Certificate

active

06848341

ABSTRACT:
A hammer useful for working rock, stone, and other hardened substrates is provided. The hammer head defines an acoustic chamber which resonates tones when the hammer is used to strike an object. Variations in the tones alert the user to changes in the rock substrate. Optionally, a pin extends from a striking surface of the hammer and extends part way into the acoustic chamber.

REFERENCES:
patent: 1356673 (1920-10-01), Vaughan
patent: 1362797 (1920-12-01), Hose
patent: 2627078 (1953-02-01), Eliot
patent: 2731993 (1956-01-01), Mount
patent: 2755833 (1956-07-01), Quayle
patent: 4139237 (1979-02-01), Hay
patent: 4216808 (1980-08-01), Royce
patent: 4363344 (1982-12-01), Pollak
patent: 5002257 (1991-03-01), Evans
patent: 5408902 (1995-04-01), Burnett
patent: 6202511 (2001-03-01), Murray et al.
patent: 2001343369 (2001-12-01), None
patent: 2002219666 (2002-08-01), None

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