Pile drivers

Details Pile drivers Pile drivers

1977-02-07

1978-07-04

Hafer, Robert A.

Tool driving or impacting

Impacting devices

Impact transmitting anvil

173139, B25D 900

Patent

active

040983560

ABSTRACT:
A pile driver operated by a pressure supply of compressible fluid has a cushioning fluid chamber for transmitting the driving pulses to a pile. Both the cushioning chamber and the working chambers for generating the driving pulses are connected to an enclosed space from which the exhaust flow of fluid is able to escape by way of muffler means. The cushioning chamber draws in air at or near atmospheric pressure by way of said space which is in permanent communication with the exterior through the muffler means.

REFERENCES:
patent: 2575619 (1951-11-01), Ditson
patent: 2979033 (1961-04-01), Bassinger
patent: 3547207 (1970-12-01), Warrington
patent: 3789930 (1974-02-01), Nishimura et al.

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