Internally silenced impact driven tools and impacting means ther

Details Internally silenced impact driven tools and impacting means ther Internally silenced impact driven tools and impacting means ther

1975-03-06

1976-06-29

Purser, Ernest R.

Tool driving or impacting

Impacting devices

Hammer head comprises plural parts or diverse materials

92260, 173DIG2, 181 36A, B25D 900

Patent

active

039659925

ABSTRACT:
Impact driven tools of the type generally comprising a bitter end bounded by a collar and a shank and a tip are provided with internal silencing means comprising an opening in the bitter end, said opening filled with a sound attenuating material, which is preferably steel shot loosely packed in the opening and retained therein by a force fit plug secured by a weld. The opening is preferably axial and extends through the bitter end to or below the collar. In large diameter impact driven tools multiple openings are provided parallel to the axis and terminating at staggered points. Each such hole is filled with a sound attenuating material, such as steel shot. The rams of impacting apparatus, or air hammers, are also provided with internal silencing means comprising at least one opening, each such opening being filled with sound attenuating material, which is preferably steel shot loosely packed and retained by a force fit plug secured by a weld.

REFERENCES:
patent: 1167975 (1916-01-01), Burlingham
patent: 2604914 (1952-07-01), Kahlen
patent: 2737216 (1956-03-01), Kenerson
patent: 3605832 (1971-09-01), Stephens
patent: 3662855 (1972-05-01), Adams et al.
patent: 3861494 (1975-01-01), Grego

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