Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1985-04-17
1986-12-30
Yeung, James C.
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
91376R, 92 48, 92108, 92169, 605471, F15B 908
Patent
active
046320148
ABSTRACT:
A pneumatic booster of the type including a power piston partitioning the interior of a casing into a front chamber and a rear chamber, a reinforcing rod connected to the casing and extending through the front chamber, the power piston and the rear chamber, and a poppet valve for introducing atmospheric air into the rear chamber and actuated by an input shaft which is slidably mounted on the power piston and extends rearwards out of the casing. A passage is formed in the reinforcing rod with one end communicating permanently with a space into which atmospheric air is introduced through the poppet valve when it is actuated, a cut-off valve is provided for communicating or cutting off the passage in the reinforcing rod, and an air introducing device for introducing atmospheric air into the rear chamber is provided independently of the poppet valve.
REFERENCES:
patent: 3357311 (1967-12-01), Cripe
patent: 3364818 (1968-01-01), Hager
patent: 4256016 (1981-03-01), Thomas
patent: 4377966 (1983-03-01), Parker et al.
patent: 4402256 (1983-09-01), Ando
patent: 4484509 (1984-11-01), Belart et al.
patent: 4535680 (1985-08-01), Takayama et al.
Tokico Ltd.
Yeung James C.
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