Booster

Details Booster Booster

1995-04-27

1996-05-28

Lopez, F. Daniel

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

F15B 910

Patent

active

055200869

ABSTRACT:
First seat S.sub.1 and second seat S.sub.2 on valve element 18 are axially separated to provide a tubular connection 18a therebetween. Support member 42 is fitted into the tubular connection 18a, and carries a sound extinguishing member 41 in the form of a cylindrical metallic filter on its inner peripheral surface. Upon actuation of the booster, pressure fluid from pressure passage 23 flows into variable pressure chambers B, D after passing through the second seat S.sub.2 which is then broken, and then through the inside of the sound extinguishing member 41. The pressure fluid, which passed through the second seat S.sub.2, flows inside the sound extinguishing member 41, whereby its flow direction is rectified, and is prevented from assuming a vortical turbulent flow. This reduces the generation of sounds during the suction stroke without degrading the response of the booster.

REFERENCES:
patent: 4005638 (1977-02-01), Takeuchi
patent: 4970939 (1990-11-01), Fecher et al.
patent: 5367941 (1994-11-01), Gautier et al.

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