Integral pressure pulse attenuator

Details Integral pressure pulse attenuator Integral pressure pulse attenuator

1989-11-08

1992-04-07

Nilson, Robert G.

Pumps

Expansible chamber type

Having pulsation dampening fluid receiving space

138 30, F04B 1100

Patent

active

051023113

ABSTRACT:
An integral pulse attenuator on a high pressure axial piston hydraulic pump includes a frustoconical cavity in boss on a valve block of the pump, a cover over the cavity, a complementary frustoconically shaped flexible bladder in the cavity dividing the latter into variable volume fluid and gas chambers on opposite sides of the bladder, and a plurality of attenuator passages through a web of the valve block from a discharge port of the pump to the fluid pressure chamber in the cavity. When the pump is on, pressure pulses migrate from the discharge port to the fluid pressure chamber and are damped by oscillations of the bladder. When the pump is off, the cavity reinforces the bladder against gas pressure of about 1500 psi in the gas chamber to prevent distortion of the bladder.

REFERENCES:
patent: 1952994 (1934-03-01), Laird
patent: 2811925 (1957-11-01), Crookston
patent: 3192864 (1965-07-01), Notte
patent: 4220376 (1980-09-01), Spero
patent: 4264287 (1981-04-01), Ishida et al.
patent: 4514151 (1985-04-01), Anders
Two unnumbered and undated pages from an advertising brochure.

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