Pumps – Condition responsive control of pump drive motor – Single motor control element responsive to means sensing...
Patent
1983-09-27
1985-01-15
Freeh, William L.
Pumps
Condition responsive control of pump drive motor
Single motor control element responsive to means sensing...
417415, 12820421, 12820518, 74 57, 92 33, F04B 4906, F04B 3504, A61M 1600
Patent
active
044936141
ABSTRACT:
A pump primarily intended for use in a portable ventilator. The pump includes a piston-cylinder arrangement in which the piston is reciprocally moved within the cylinder by rotating a shaft. The shaft is threaded and mounted for rotation within the cylinder at a fixed location along the axis of the cylinder. The piston has an aperture through its center and the shaft extends substantially between the end walls of the cylinder and through the center of the piston. The piston is held against rotation relative to the shaft and cylinder by a collapsible hinge and is attached to the shaft by an arrangement including a ball nut and sealing nut. The piston forms a variable volume, working chamber with one end of the cylinder and in operation, the shaft is selectively rotated to move the piston toward and away from the end wall. This positioning of the shaft within the cylinder reduces the overall size of the pump and specifically adapts it for use in a portable ventilator in which size limitations are critical.
REFERENCES:
patent: 862867 (1907-08-01), Eggleston
patent: 1580131 (1926-04-01), Ghiardi
patent: 2061869 (1936-11-01), Gilbert et al.
patent: 2389918 (1945-11-01), Macgill
patent: 2462571 (1949-02-01), Thompson et al.
patent: 3010887 (1961-11-01), Baumgarten et al.
patent: 3208388 (1965-09-01), Glasgow
patent: 3461866 (1969-08-01), Ritchie
patent: 4004299 (1977-01-01), Runge
patent: 4076021 (1978-02-01), Thompson
patent: 4145166 (1979-03-01), Justice
patent: 4175475 (1979-11-01), Eckhardt
patent: 4180375 (1979-12-01), Magnussen, Jr.
patent: 4221543 (1980-09-01), Cosentino et al.
patent: 4243029 (1981-01-01), Apple
patent: 4262667 (1981-04-01), Grant
patent: 4276003 (1981-06-01), Perkins et al.
Bergman Marc A.
Chu Raymond D.
Freeh William L.
Lifecare Services, Inc.
Neils Paul F.
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