Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1981-10-02
1985-08-20
Garrett, Robert E.
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
F15B 910
Patent
active
045356793
ABSTRACT:
A control valve 44 for use in a fluid pressure operated motor 10 to control the communication of fluid between first and second chambers 34 and 36. The control valve 44 includes a plunger 58, a disc 46 and a retainer 70. The retainer 70 has a cylindrical body 82 with an inwardly projecting lip of which section 84 engages and holds the peripheral surface 48 against shoulder 78 on the hub 26 and an end section 94 which acts as a stop to limit the movement of plunger 58 in bore 38 when the valve 44 is in the released position. Tabs 100, 100'. . . 100.sup.N on sleeve or cylinder 82 are located in groove 102 to lock the retainer 70 in place. In response to an input, push rod 56 moves plunger 58 to allow disc 46 to move and initially interrupt communication of a first fluid between the first and second chamber 34 and 36 and thereafter permit a second fluid to flow into the second chamber 36. With the first fluid in the first chamber 34 and the second fluid in the second chamber 36, a pressure differential is developed such that wall 30 and hub 24 move to provide push rod 64 with an output force.
REFERENCES:
patent: 4005638 (1977-02-01), Takeuchi
patent: 4066005 (1978-01-01), Farr
patent: 4237770 (1980-12-01), Harrison et al.
patent: 4282799 (1981-08-01), Takeuchi
patent: 4350077 (1982-09-01), Takeuchi
Bradley Abram M.
Decker Ken C.
Garrett Robert E.
McCormick Jr. Leo H.
The Bendix Corporation
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