Pneumatic impact gun

Details Pneumatic impact gun Pneumatic impact gun

1977-07-08

1978-10-17

Staab, Lawrence J.

Tool driving or impacting

Impacting devices

Hammer head constitutes piston of drive motor

B21J 1518

Patent

active

041203674

ABSTRACT:
A pneumatic impact gun having an accumulator and interlock system for rapidly dumping a predetermined amount of compressed air into a cylinder to thereby propel an associated piston toward an anvil for contact with a rivet to be upset. The interlock system prevents accidental firing of the gun until a normally open interlock valve is manually depressed. Thereupon, a trigger valve may be manually opened to permit compressed air from a source to open a main valve and charge the accumulator to a predetermined pressure. The air in the accumulator may then be rapidly dumped therefrom into contact with the piston. Additionally, a metering valve serves as an energy selector to permit selective charging of the accumulator for varying the resulting impact of the piston onto the anvil.

REFERENCES:
patent: 2303666 (1942-12-01), Souter
patent: 2933068 (1960-04-01), Johnson et al.
patent: 2943328 (1960-07-01), Carpenter et al.
patent: 3111997 (1963-11-01), Krembel
patent: 3216510 (1965-11-01), Briden
patent: 3363512 (1968-01-01), Ottestad
patent: 3385378 (1968-05-01), Weber et al.
patent: 3762160 (1973-10-01), Kramer
patent: 3851713 (1974-12-01), Fedosenko et al.

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