Radial piston type multi-stroke hydraulic pump or motor

Details Radial piston type multi-stroke hydraulic pump or motor Radial piston type multi-stroke hydraulic pump or motor

1977-02-10

1978-08-08

Freeh, William L.

Motors: expansible chamber type

Three or more cylinders arranged in parallel radial or...

Radially disposed cylinders

F01B 1306

Patent

active

041049560

ABSTRACT:
In radial piston type multi-stroke hydraulic pump or motor having undulating cam surface, said cam surface is constructed based upon an asymmetrical trapezoid torque curve (of torque-phase diagram), thereby preventing the abrasive wear of the cam surface and faulty operations of valve means due to shorter valve switching time and also maintaining the torque constant.

REFERENCES:
patent: 1723874 (1929-08-01), Large
patent: 1766610 (1930-06-01), Davis
patent: 2882831 (1959-04-01), Danneuig
patent: 2992619 (1961-07-01), Nilges
patent: 3046950 (1962-07-01), Smith
patent: 3151529 (1964-10-01), Leath
patent: 3561329 (1971-02-01), Firth
patent: 4048906 (1977-09-01), Firth et al.
Selection of the Track Profile for a Radial-Piston High-Torque Hydraulic Motor by Yu F. Ponomarenko, published in Russian Journal, Dec. 1961.

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