Rubber-geared pump with shaftless gear

Details Rubber-geared pump with shaftless gear Rubber-geared pump with shaftless gear

1992-02-06

1992-11-17

Bertsch, Richard A.

Rotary expansible chamber devices

Non-metallic working member, cylinder or partition

Resilient

418156, 418179, 418206, F04C 208, F04C 1300

Patent

active

051638240

ABSTRACT:
A gear pump is described for pumping extremely low volumes of fluid at extremely low rates of flow. The pump includes a housing with a cavity therein and a pair of gears rotatable within said cavity. One of the gears is shafted and the other is shaftless, and the gears are made of resilient material with the diameter of the periphery of the tips of the gear teeth exceeding the diameter of the cavity in which they rotate. The face width of the gears also exceeds the depth of the cavity in which they rotate.

REFERENCES:
patent: 1897560 (1933-02-01), Lawser
patent: 2530767 (1950-11-01), Hamill
patent: 2567699 (1951-09-01), Devlin
patent: 2633083 (1953-03-01), Smith
patent: 2936717 (1960-05-01), Kalle
patent: 3039398 (1962-06-01), Michelis
patent: 3881849 (1975-05-01), Commarmot et al.
patent: 4249750 (1981-02-01), Kantner

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