Hydraulically operated impact motor

Details Hydraulically operated impact motor Hydraulically operated impact motor

1979-10-17

1982-09-14

Reynolds, W. Carter

Tool driving or impacting

Impacting devices

Impact transmitting anvil

91300, 91321, 91441, 173DIG4, B25D 904, B25D 912, F01L 2504

Patent

active

043490751

ABSTRACT:
A hydraulically operated impact motor, e.g. for a jack hammer, has a hammer piston that has a piston surface 19 in a pressure chamber 21 which is constantly pressurized in order to effect the work strokes of the hammer piston, and a larger piston surface 20 in a second pressure chamber 21 which is intermittently pressurized in order to effect the return strokes of the hammer piston. The second pressure chamber 22 is also connected to the exhaust line via a one-way valve that permits flow towards the second pressure chamber 22.

REFERENCES:
patent: 3033168 (1962-05-01), Ruhl
patent: 3207043 (1965-09-01), Kay
patent: 3322038 (1967-05-01), Dobson
patent: 3552269 (1971-01-01), Arndt
patent: 3741072 (1973-06-01), Romell et al.
patent: 3771422 (1973-11-01), Kamman
patent: 3780621 (1973-12-01), Romell
patent: 3939757 (1976-02-01), Jablonsky
patent: 4073350 (1978-02-01), Ekloff et al.
patent: 4172411 (1979-10-01), Matsuda et al.

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