Class 417/193 - By movable conduit or conduit wall (e.g., combining tube)

Subclass of Class 417 - Pumps
Definition: Apparatus in which the controlling means comprises an axially
No. of patents: 3
Last issue date: 07/16/1991

Number	Title	Issue Date
5032059	Suction and pumping apparatus The present invention discloses a venturi pumping arrangement which is used to pump fluids or solutions with a high efficiency. The arrangement comprises an inner pipe and an outer pipe having a passage therebetween. The inner pipe is partially located in...	07/16/1991
4073602	Vacuum producing device A vacuum producing device comprises a venturi unit which functions to produce or stop producing a vacuum after predetermined movement of a surrounding sleeve and air shut off member and includes silencing means for substantially reducing the sound of pres...	02/14/1978
3942724	Variable throat nozzle A nozzle having a through passageway in which the flow of pressurized fluid induces the flow of secondary fluid therethrough with the passageway having a throat that is adjustable in cross-sectional extent to enable the nozzle to efficiently operate over ...	03/09/1976

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