Hydrostatic pump and motor

Motors: expansible chamber type – Three or more cylinders arranged in parallel radial or... – Radially disposed cylinders

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Details

91497, 417219, 417273, F01B 1306, F04B 106, F04B 104

Patent

active

052495124

ABSTRACT:
A hydrostatic pump and motor combination is disclosed including a rotor having radially disposed cylinders containing reciprocatably disposed spherical balls therein. A free outer race is eccentrically disposed about the rotor to define either a pump or motor. The cylinders are tilted relative to the center of the rotor to reduce side torque thrust loads on the cylinders. Also disclosed are a hydrostatic pump and motor including matching spherical slipper shoes and spherical free outer race. Hydrostatic thrust cups are disposed within the cylinders to reduce frictional losses, wear, and leakage. The thrust cups include hydrostatic means for supporting the balls in the cylinders, thereby self adjusting in response to fluid pressure and centrifugal loads.

REFERENCES:
patent: 2501165 (1950-03-01), Ferris
patent: 2823619 (1958-02-01), May
patent: 2838003 (1958-06-01), Joy
patent: 3101078 (1963-08-01), Evans
patent: 3274946 (1966-09-01), Simmons
patent: 3747477 (1973-07-01), Aldinger
patent: 3791703 (1974-02-01), Ifield
patent: 4128048 (1978-12-01), Nishiba
Product Brochure of Voith Transmissions, Inc., Voith Radial Piston Pumps.
Design and Application of 40.degree. Hydraulic Motors, Leif Andersin and Craig Klocke, SAE Technical Paper Series, 1985 International Off-Highway & Powerplant Congress & Exposition, Mecca, Milwaukee, Wisc., Sep. 9-12 1985.
General Electric and the U.S. Army's Tank-Automotive Command (TACOM) article.
Broader Horizons With High Efficiency Pumps and Motors, Hugh I. Frazer, Ifield Engineering, Australia.

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