Low flow constant rate pump

Details Low flow constant rate pump Low flow constant rate pump

1982-04-05

1984-08-28

Pellegrino, Stephen C.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604145, 604890, 222399, A61M 100

Patent

active

044682204

ABSTRACT:
A low flow, constant rate pump is provided which comprises a fixed volume container, the inner walls of said container defining a receptacle for a liquid to be dispensed, said container being provided with means to form an unobstructed opening through which said liquid may be caused to flow continuously at a low-flow, constant rate, a propellant chamber within said container formed of a material which is permeable to vapor from a propellant of the liquid-vapor type, a supply of propellant of the liquid-vapor type confined within said chamber, said propellant initially being under pressure sufficient to maintain a major portion thereof in liquid form at normal temperatures.

REFERENCES:
patent: 2962196 (1960-11-01), Ayres
patent: 3023750 (1962-03-01), Baron
patent: 4203441 (1980-05-01), Theeuwes

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