Pressure vibration damping device in combination of liquid colum

Details Pressure vibration damping device in combination of liquid colum Pressure vibration damping device in combination of liquid colum

1990-08-30

1992-03-24

Bertsch, Richard A.

Pumps

Expansible chamber type

Having pulsation dampening fluid receiving space

417294, 280707, F04B 1100

Patent

active

050982630

ABSTRACT:
A pressure vibration damping device in a liquid supply passage for supplying a liquid from a pump to a hydraulic device such as a fluid pressure type suspension of a vehicle, including a pressure pulse absorbing means adapted to be able to accept and return a small amount of the liquid from and to said liquid supply passage so as to absorb momentary changes in the flow rate of the liquid in the liquid supply passage, and a liquid column vibration damping means adapted to be able to apply a substantial flow resistance principally to a high velocity flow of the liquid in the liquid supply passage at a part thereof between the pump and the pressure pulse absorbing means, the high flow velocity being due to pulse flows of the liquid induced by a resonance of pulsating output of the pump and the pressure pulse absorbing means and substantially higher than a mean flow velocity of the liquid corresponding to a normal rate of supply of the liquid through the liquid supply passage.

REFERENCES:
patent: 2678202 (1954-05-01), Brake
patent: 3804125 (1974-04-01), Sonneman
patent: 4257458 (1981-03-01), Kondo et al.
patent: 4273158 (1981-06-01), Chun
patent: 4594059 (1986-06-01), Becker
patent: 4801245 (1989-01-01), de Haas et al.
patent: 4892465 (1990-01-01), Born et al.
patent: 4957309 (1990-09-01), Komazawa et al.
patent: 4971353 (1990-11-01), Buma et al.
Lotus' Active Suspension--Automotive Engineer--Alan Baker.
European Search Report.

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