Tool driving or impacting – Impacting devices – Length of cyclic travel of hammer head selectively adjustable
Patent
1986-02-28
1987-09-22
Schran, Donald R.
Tool driving or impacting
Impacting devices
Length of cyclic travel of hammer head selectively adjustable
173115, 173121, 60387, 60593, B25D 926
Patent
active
046949127
ABSTRACT:
An impact power tool for delicate hand working operations is provided which is especially adapted for detailed engraving, carving, and delicate stone setting applications. The power tool preferably includes a hand-held impact device, a piston received within the body of the device and shiftable therein for delivering impact energy to the device, conduit for delivering and venting motive fluid from and to the hand-held device for shifting of the piston, and a valve coupling the directing and venting conduits to the device in alternative fashion at rapid, variable, cyclical rate. The impact tool may be operated by connection to a standard source of pressurized air. The tool is capable of providing a greater range of impact strokes per second than conventional hand-held controlled impact tools, and thereby provides expanded capability for extremely delicate and fine engraving, carving and stone setting work.
REFERENCES:
patent: 969354 (1910-09-01), Zelumbe
patent: 1446547 (1923-02-01), Crowe
patent: 2392560 (1946-01-01), Vitoux
patent: 2669840 (1954-02-01), Joy
patent: 2876742 (1959-03-01), Sherrill et al.
patent: 2969772 (1961-01-01), Cahill
patent: 3393755 (1968-07-01), Glaser
patent: 3605915 (1971-09-01), Gately et al.
Glendo Corporation
Schran Donald R.
Wolfe James L.
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