Control of hydraulically powered equipment

Details Control of hydraulically powered equipment Control of hydraulically powered equipment

1974-11-13

1977-05-03

Maslousky, Paul E.

Motors: expansible chamber type

Moving cylinder

Cylinder and piston have relative reciprocation on fixed axis

91290, 91321, 91330, 91337, F01B 1500, F01B 718, F01L 2506

Patent

active

040207447

ABSTRACT:
A hydraulically driven hammer is disclosed, along with valve actuation arrangements which operate to switch hydraulic forces on the hammer ram after preselected intervals following application of pressurized pilot fluid flows. These flows pass into a fluid accumulation chamber until a predetermined volume is accumulated after which continued pilot fluid flow produces valve actuation.

REFERENCES:
patent: 964970 (1910-07-01), Hultquist
patent: 1723449 (1929-08-01), Tolkien
patent: 2006237 (1935-06-01), Eynard
patent: 2237871 (1941-04-01), Stone
patent: 3007451 (1961-11-01), Washburn et al.
patent: 3145796 (1964-08-01), Padula
patent: 3207043 (1965-09-01), Kay
patent: 3225663 (1965-12-01), Pelisson
patent: 3302974 (1967-02-01), Hlinsky
patent: 3376791 (1968-04-01), Ashfield et al.
patent: 3780621 (1973-12-01), Romell

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