Impact tool

Details Impact tool Impact tool

1984-03-07

1986-04-22

Schran, Donald R.

Tool driving or impacting

Impacting devices

Hammer head driven by relatively moving motion transmitting...

173 49, B25D 1110

Patent

active

045836000

ABSTRACT:
An impact-delivery tool (20) includes a motor-driven gear (72) which supports for continuous rotation therewith a relatively shiftable drive pin (80). The drive pin (80) is selectively shifted to couple the rotary drive of the gear (72) to a reciprocably operable, impact drive bar (76). An interrupt mechanism (78) which detects workpiece engagement by the tool (20) and operator actuation of the tool, both necessary for tool operation, controls the coupling and decoupling of the drive pin (80) relative to the drive bar (76). The interrupt mechanism (78) provides selective processing of the tool (20) through an impact delivery power stroke and a return stroke while also precluding successive power strokes.

REFERENCES:
patent: 1823644 (1931-10-01), Cossock
patent: 1845617 (1932-02-01), Metcalf
patent: 3169559 (1965-02-01), Working, Jr.
patent: 4031763 (1977-06-01), Eisenberg
patent: 4042036 (1977-08-01), Smith, III et al.
patent: 4121745 (1978-10-01), Smith et al.
patent: 4129240 (1978-12-01), Geist
patent: 4161272 (1979-06-01), Brockl
patent: 4204622 (1980-05-01), Smith et al.
patent: 4298072 (1981-11-01), Baker et al.
patent: 4323127 (1982-04-01), Cunningham
patent: 4449660 (1984-05-01), Smith

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