Pile-driving hammer

Details Pile-driving hammer Pile-driving hammer

1976-04-19

1978-01-10

Hafer, Robert A.

Tool driving or impacting

Impacting devices

Hammer head constitutes piston of drive motor

92153, 92160, B25D 900

Patent

active

040674010

ABSTRACT:
A pile-driving hammer comprises a hammer cylinder, a piston accomodated in said hammer cylinder in sealing relationship with a sliding face of the hammer cylinder and means for supplying lubricant to said sliding face which consists of a lining of wear-resistant material.
The pile driving hammer has a long lifetime, since cavities are provided in the lining distributed along the surface of the sliding face. In this hammer the lubricant is retained in the cavities.

REFERENCES:
patent: 1689752 (1928-10-01), Rushmore
patent: 1751906 (1930-03-01), Clark
patent: 2085976 (1937-07-01), Heintz
patent: 2166857 (1939-07-01), Bugatti
patent: 2907304 (1959-10-01), Macks
patent: 3106138 (1963-10-01), Thoma
patent: 3521531 (1970-07-01), Kaesemodel

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