Rotary-vane pump

Details Rotary-vane pump Rotary-vane pump

1991-03-11

1993-05-11

Bertson, Richard A.

Pumps

With condition responsive pumped fluid control

Pressure responsive relief or bypass valve

417300, F04B 4908

Patent

active

052096483

ABSTRACT:
A rotary-vane pump has a pump outlet, a pressure chamber of the pump, a flow control valve, and a throttle disposed between the pump outlet and the flow control valve. According to the present invention, the throttle is formed by an insert which is disposed in a pressure passage between the pump outlet and the flow control valve. Specifically, the pressure passage is disposed between the pump outlet and the pressure chamber, and the insert is hollow cylindrical and has an axial bore having one axial end portion disposed on the pressure passage. The insert is disposed in the pressure passage at an angle approximately 90.degree. in relation to the inflow direction of pressure medium in the passage.

REFERENCES:
patent: 2910944 (1959-11-01), Pettibone
patent: 3384020 (1968-05-01), Searle
patent: 4401417 (1983-08-01), Davis
patent: 4505649 (1985-03-01), Masuda et al.
patent: 4597718 (1986-07-01), Nakano et al.
patent: 4708598 (1987-11-01), Sugita et al.
patent: 4715793 (1987-12-01), Johann et al.
patent: 4770612 (1988-09-01), Teubler

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