Expansible chamber devices – With fluid purifying means
Patent
1979-06-11
1981-04-07
Cohen, Irwin C.
Expansible chamber devices
With fluid purifying means
92110, 92130R, 92161, 92163, 92170, 92171, F01B 2902, F15B 2104, F16J 1104
Patent
active
042598958
ABSTRACT:
A vacuum motor includes a cylindrical housing with a mount plate at one end and an end wall at its other end terminating in a guide tube. A stem, adapted for connection to an intermittently actuated vacuum source projects into and is secured to the mount plate and is adapted for securing to a support. A cylinder is nested within the housing open at one end and at its other end is axially recessed to define with the mount plate a first vacuum chamber communicating with the stem bore. A hollow reciprocal piston open at one end is sealed within the cylinder a and terminates in a tubular piston rod which projects outwardly of the guide tube adapted for connection to a load to be moved a predetermined distance. The interior of the piston defines with the cylinder a power air chamber communicating with the piston rod and atmosphere. The piston defines with the housing end wall a second vacuum chamber which is in communication with the first vacuum chamber. A compression spring within the cylinder normally biases the piston to a retracted position.
REFERENCES:
patent: 1859309 (1932-05-01), Mallory
patent: 2015374 (1955-09-01), Baker
patent: 2177767 (1939-10-01), Campbell
patent: 3023739 (1962-03-01), Dickson, Jr. et al.
patent: 3486491 (1969-12-01), White
patent: 3695149 (1972-10-01), Eberhart
patent: 4020749 (1977-05-01), Muller et al.
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