Variable displacement pump

Details Variable displacement pump Variable displacement pump

1998-09-02

2000-06-27

Solis, Erick R.

Pumps

Condition responsive control of drive transmission or pump...

Having condition responsive pumped fluid control

F04C 1504, F04C 2344

Patent

active

060799552

ABSTRACT:
A cam case 23 is provided which swingably support a cam ring 34 fitted to a rotor 33 having a vane 33a so as to form a pump chamber 36 from the outer surface such that the cam ring 34 is swingably supported by using a swingable pin 35 disposed in the axial direction as a fulcrum, the cam case 23 serving as an intermediate body. Pump bodies are disposed on the two ends of the cam case in the axial direction. Moreover, a front body 21 and a rear body 22 for rotatively supporting a rotational shaft 40 of the rotor are disposed. A valve hole 75 for forming a relief valve 74 for relieving fluid pressure in the discharge portion of the pump to a suction portion of the pump when the fluid pressure has been made to be not lower than a predetermined level is a blind hole having an end which is, in the rear body, opened in a joining surface with the cam case. Valve elements 74a received in the valve hole are anchored by the joining surface of the cam case.

REFERENCES:
patent: 5518380 (1996-05-01), Fujii et al.
patent: 5562432 (1996-10-01), Semba et al.
patent: 5895209 (1999-04-01), Miyazawa

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