Motors: expansible chamber type – Fluid supply through diverse paths to single expansible chamber – Position responsive
Patent
1980-09-11
1982-12-21
Maslousky, Paul E.
Motors: expansible chamber type
Fluid supply through diverse paths to single expansible chamber
Position responsive
91395, 91398, 91408, F15B 1522
Patent
active
043643019
ABSTRACT:
A vacuum actuator for connection to a vacuum source, the actuator utilizing a diaphragm combination having three stable positions. An annular diaphragm, having its outer periphery fixed in a housing, has its inner periphery secured between two movable annular members, the diaphragm and the annular members forming a combination dividing the housing into upper and lower chambers. Two inlet ports individually supply a vacuum force or atmospheric pressure to the upper chamber, the first one of the ports including a projection extending toward a space formed by the movable members. A poppet valve normally closes an opening at the top of the space, the bottom of the space normally having access to the atmosphere. When vacuum is applied to the first port, the diaphragm combination is raised from a biased first position to the position where the poppet valve interrupts the vacuum through the projection, determining the second position. The application of vacuum force to the second inlet port then raises the diaphragm combination to the third stable position, the projection sliding the poppet valve to a lower position in the space formed by the movable members, closing the access to the atmosphere.
REFERENCES:
patent: 3072108 (1963-01-01), Cripe
patent: 3381582 (1968-05-01), Golden
patent: 3545070 (1970-12-01), Bauer
patent: 3657966 (1972-04-01), Campbell
Aoki Kongo
Kawabata Yasuhiro
Aisin Seiki Kabushiki Kaisha
Maslousky Paul E.
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