Hydraulic impact tool

Details Hydraulic impact tool Hydraulic impact tool

1985-07-30

1988-05-24

Kazenske, E. R.

Tool driving or impacting

Impacting devices

With means to cause or control advance of hammer head

173134, 91321, B23B 4516

Patent

active

047459816

ABSTRACT:
A hydraulic impact tool having a housing, a working tool, a ram, an energy storage device, and a valve slide. The tool also has a high pressure hydraulic fluid inlet port, an intermediate pressure hydraulic fluid inlet port, and two return lines. One of the return lines is for exhausting fluid from an upper annular chamber, and the other return line is for exhausting fluid from an intermediate annular chamber.

REFERENCES:
patent: 640728 (1884-08-01), Buske
patent: 3687008 (1972-08-01), Densmore
patent: 3838741 (1974-10-01), Pepe
patent: 4231434 (1980-11-01), Justus
patent: 4479551 (1984-10-01), Justus
U.S. Ser. No. 640,728 filed Aug. 1984, Buske.

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