Hydraulic hammer

Details Hydraulic hammer Hydraulic hammer

1977-06-06

1979-10-30

Maslousky, Paul E.

Motors: expansible chamber type

Cyclically operable

Adjustable working member reversal position

91300, 91307, F01L 2506

Patent

active

041724119

ABSTRACT:
A hydraulic hammer wherein the reciprocal motion of a drill-striking piston is operated by means of a spool valve for switching hydraulic pressure to a double-acting cylinder depending upon the position of the piston. The hydraulic hammer further includes a self starter means which assures activation of the hammer whenever hydraulic pressure is applied to the hydraulic hammer and a means for compensating for variations in boring conditions such that energy is efficiently delivered by the drill striking piston.

REFERENCES:
patent: 295003 (1884-03-01), Holsey
patent: 806128 (1905-12-01), Flottmann
patent: 870391 (1907-11-01), Starrett
patent: 3361036 (1968-01-01), Harvey et al.
patent: 3713365 (1973-01-01), Goodrich
patent: 3780621 (1973-12-01), Romell

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