Hydraulic percussive machines

Details Hydraulic percussive machines Hydraulic percussive machines

1978-02-28

1980-05-20

Maslousky, Paul E.

Motors: expansible chamber type

Cyclically operable

Working chamber receives controlled motive fluid supply from...

91320, 91436, 92 85B, F01B 718, F01B 1102, F01L 2506

Patent

active

042033500

ABSTRACT:
A hydraulic percussive machine comprising a piston and cylinder with a dashpot at the front end to cushion overtravel of the piston. Heat is removed from the dashpot by admitting pressure fluid to the return stroke chamber through a front chamber and the dashpot. On the pressure stroke fluid from the return stroke chamber is admitted to the working stroke chamber in one case by causing all flow to take place along that route and in the other place by having two feeds to the working stroke chamber with a flow restrictor in the direct feed line.

REFERENCES:
patent: 3701386 (1972-10-01), Feucht
patent: 3887019 (1975-06-01), Reynolds
patent: 4018135 (1977-04-01), Lance
patent: 4020747 (1977-05-01), Reynolds

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