of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member

Introduced: January 1980

Last revised: January 2006

Full Title

Rotary-piston pumps specially adapted for elastic fluids > of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing > of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member

Classification Context

Section:: MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
Class:: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
Subclass:: ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS

2 direct subcodes

Child Classifications

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F04C 18/107 with helical teeth
F04C 18/113 the inner member carrying rollers intermeshing with the outer member