Motors: expansible chamber type – Plural relatively movable or rigidly interconnected working... – With means for selectively changing the speed or force...
Patent
1985-06-05
1986-07-08
Focarino, Margaret A.
Motors: expansible chamber type
Plural relatively movable or rigidly interconnected working...
With means for selectively changing the speed or force...
60425, 91524, 180152, F15B 1306
Patent
active
045986290
ABSTRACT:
Two pistons (5, 8) are mounted in the same casing (1) so as to slide in a sealed manner, the two pistons (5, 8) being firmly fixed to one another and having corresponding actuating chambers (21, 22; 23, 24) which are separated from one another and are supplied sequentially by two distribution valves (A, B) which are situated in the casing (1) and are actuated by the input shaft (14). The second piston (8) is formed by an extension (7) of the first piston (5) and its corresponding actuating chambers (22, 24) are formed in the piston structure (5, 8) and by a housing (4) in the casing (1), respectively, the housing (4) being coaxial with the main housing (3) for the first piston (5). The two valves (A, B) are advantageously of the type having a star-shaped rotor (30, 40).
REFERENCES:
patent: 3817152 (1974-06-01), Viron
patent: 3848693 (1974-11-01), Sheppard
patent: 4186818 (1980-02-01), Jablonsky
patent: 4296677 (1981-10-01), Little et al.
patent: 4382483 (1983-05-01), Spencer
patent: 4458580 (1984-07-01), Masuda et al.
Bendiberica /S.A.
Decker Ken C.
Flanigan Allen J.
Focarino Margaret A.
Palguta Larry J.
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