Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1985-02-28
1986-04-22
Maslousky, Paul E.
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
91376R, F15B 910
Patent
active
045834466
ABSTRACT:
A pneumatic booster includes a movable wall mounted in a hollow body to divide the interior of the body into a low pressure chamber and a high pressure chamber, the movable wall having an internal bore extending therethrough. An input member is movably received in the bore and carries a plunger. A valve member is selectively engageable with a first valve seat formed on the plunger and a second valve seat formed on the surface of the bore for controlling a pressure differential between the low and high pressure chambers. At least one pin slidably extends through the movable wall and is engageable with a rear wall of the body for allowing the movable wall to move rearwardly relative to the pin. An operating member has a tubular portion slidably received in the bore and is connected to the pin for movement therewith. An output member and a load-transmitting member for transmitting a load to the output member in response to a forward movement of the input member are received in the tubular portion. A plurality of projections extend radially inwardly from the rear end of the tubular portion for engagement with the plunger for limiting the rearward movement of the plunger relative to the operating member.
REFERENCES:
patent: 4402256 (1983-09-01), Ando
patent: 4425760 (1984-01-01), Furuta
patent: 4472997 (1984-09-01), Ohmi
Maslousky Paul E.
Nippon Air Brake Co., Ltd.
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