IPIQ

MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

F04

POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS

F04C

ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS

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18/00

Rotary-piston pumps specially adapted for elastic fluids

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F04C18/30

having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members

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F04C18/34

having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members

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F04C18/356

with vanes reciprocating with respect to the outer member

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F04C18/3562

the inner and outer member being in contact along one line or continuous surfaces substantially parallel to the axis of rotation

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F04C18/3564

the surfaces of the inner and outer member, forming the working space, being surfaces of revolution

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Patent classifications