Pneumatic hammer driver

Details Pneumatic hammer driver Pneumatic hammer driver

1977-01-27

1978-10-31

Staab, Lawrence J.

Tool driving or impacting

Drive controlled by relative axial movement of tool

Drive motor controlled

173127, 173139, 227 8, 227130, B25C 104, B25C 502

Patent

active

041229045

ABSTRACT:
An improved driver is provided wherein a pneumatically operated piston is slidably disposed in a cylinder which is adapted to vent to atmosphere through a port positioned adjacent the end wall of the cylinder. A piston cushion, anchored to the interior surface of the cylinder end wall, is configured to provide communication between the port and the air trapped under the piston when the latter makes contact with the cushion, as well as to avoid piston flexing when struck by the piston. The cylinder end wall is removable to provide access to the interior of the cylinder. A hammer, in the form of a shaft, is removably affixed to the piston in a manner that precludes leakage through the piston and extends through the cushion and the cylinder end wall. Sealing means which are accessible from the interior surface of the end wall provide sealing contact between the latter and the hammer.

REFERENCES:
patent: 2836443 (1958-05-01), Farmer
patent: 2887686 (1959-05-01), Wandel et al.
patent: 3043272 (1962-07-01), Wandel et al.
patent: 3352471 (1967-11-01), Fisher
patent: 3512454 (1970-05-01), Perkins
patent: 3601007 (1971-08-01), Korth
patent: 3708096 (1973-01-01), Burke
patent: 3776445 (1973-12-01), Pomeroy
patent: 3893610 (1975-07-01), Smith
patent: 3905535 (1975-09-01), Novak et al.

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