Braking-power boosters with noise suppression

Details Braking-power boosters with noise suppression Braking-power boosters with noise suppression

1988-03-07

1989-12-12

Garrett, Robert E.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

91376R, 181230, 181258, F15B 910

Patent

active

048859796

ABSTRACT:
A braking-power booster including a valve for controlling the pressure that acts upon the booster piston. The valve has two radially spaced valve seats, which both face toward and seal off against a valve sealing plate. With the radially inward valve seat off the valve plate, air passes through the valve. A silencer in the form of a screen is arranged directly alongside the radially inward seat that is opened off the plate. Upon air passing through the valve, the screen suppresses noise generated in the valve. The screen is of a round-wire netting, comprised of brass wire that is galvanized. The screen has a cup-shape, and its convex side faces the seat.

REFERENCES:
patent: 3949828 (1976-04-01), Frochaux
patent: 4022112 (1977-05-01), Putt et al.
patent: 4274258 (1981-06-01), Shirai et al.
patent: 4324314 (1982-04-01), Beach et al.
patent: 4535680 (1985-08-01), Takayama et al.
patent: 4572055 (1986-02-01), Schiel
patent: 4641568 (1987-02-01), Boehm et al.
patent: 4716814 (1988-01-01), Yamakoshi

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