Hammer starting mechanism

Details Hammer starting mechanism Hammer starting mechanism

1981-03-12

1983-12-06

Jones, Jr., James J.

Tool driving or impacting

Impacting devices

Impact transmitting anvil

91234, 91240, B25D 904

Patent

active

044187696

ABSTRACT:
A starting mechanism for a reciprocating piston pneumatic hammer provides a passageway coupling a pneumatic piston subchamber to an exit port to exhaust pressurized pneumatic fluid from the subchamber during a start-up period. A pneumatic valve is provided to open the passageway as the hammer is started so as to create a pressure differential in the coupled piston subchamber, and thus prevent the piston from centering. The valve closes the passageway after the piston reciprocation has begun.

REFERENCES:
patent: 1401003 (1921-12-01), Smith
patent: 1504976 (1924-08-01), Ringle
patent: 1554776 (1925-09-01), Bayles
patent: 1573457 (1926-02-01), Slaber
patent: 1872403 (1932-08-01), Cannon
patent: 3785248 (1974-01-01), Bailey
patent: 3879018 (1975-04-01), Hunter
patent: 4282937 (1981-08-01), Hibbard

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