Swash plate type pump with flow path through cavity containing s

Details Swash plate type pump with flow path through cavity containing s Swash plate type pump with flow path through cavity containing s

1989-11-13

1991-08-06

Look, Edward K.

Power plants

Pressure fluid source and motor

Having a signal, indicator or inspection means

60444, 60465, 60468, F16D 3102

Patent

active

050366599

ABSTRACT:
Overheating of hydraulic fluid in a hydraulic motor system subject to aiding loads can be avoided without paying a weight or volume penalty by providing a return port (64) adapted to be connected to the system return (22) in fluid communication with a cavity (46) within an hydraulic motor housing (32) that houses the swash plate (34). A pressure relief valve (62) is connected to the supply port (38) of the hydraulic motor (30) as well as to the return port (64) and is operative to open when the pressure at the supply port (38) increases as a result of an aiding load so as to allow recirculation of hydraulic fluid through the motor (30). By placing the swash plate cavity (46) in the recirculation line, increased heat sink capacity is added to the system without increasing weight or volume.

REFERENCES:
patent: B433094 (1976-01-01), Hunck et al.
patent: 3650107 (1972-03-01), Court
patent: 3760687 (1973-09-01), Inaba et al.
patent: 3893375 (1975-07-01), Hein et al.
patent: 4487109 (1984-12-01), Burandt et al.
patent: 4627329 (1986-12-01), Durtschi
patent: 4712377 (1987-12-01), Yoshida et al.
patent: 4768340 (1988-09-01), Hamilton

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