Pneumatic servo booster

Details Pneumatic servo booster Pneumatic servo booster

1983-12-28

1985-08-20

Maslousky, Paul E.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

91369A, 181230, F15B 910

Patent

active

045356807

ABSTRACT:
A pneumatic servo booster including a housing, a power piston unit partitioning the interior of the housing into front and rear chambers and having therein a first passage with one end opening to the front chamber and the other end opening to the interior of the power piston unit and a second passage with one end opening to the rear chamber and the other end opening to the interior of the power piston unit, and a valve mechanism provided in the interior of the power piston unit and being associated with an input rod to control the communication between first and second passages and between the second passage and another passage which is communicated with a source of a first reference pressure. A plurality of diversion channels are provided in at least one of the first and second passages to decrease the speed of the air flow in the passage and to rectify the air flow thereby suppressing noise.

REFERENCES:
patent: 4022112 (1977-05-01), Putt et al.
patent: 4117769 (1978-10-01), Carre et al.
patent: 4212370 (1980-07-01), Dreher et al.
patent: 4274258 (1981-06-01), Shirai et al.

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