Zirconia and zirconia composite ceramic shafts for gear micropum

Details Zirconia and zirconia composite ceramic shafts for gear micropum Zirconia and zirconia composite ceramic shafts for gear micropum

1996-09-06

1998-06-09

Vrablik, John J.

Rotary expansible chamber devices

Non-metallic working member, cylinder or partition

4182069, F04C 218, F04C 1500

Patent

active

057624852

ABSTRACT:
An improved gear micropump (10) for delivering corrosive materials, particularly photographic materials, such as dyes and emulsions, has a pair of intermeshing gears (16,18) rotatably mounted on zirconia ceramic shafts (24,26). The ceramic shafts of the invention may be formed from zirconia and zirconia composite materials. The gear micropump (10) having the zirconia ceramic shafts (24,26) eliminates pulsation during fluid delivery and is resistant to wear and abrasion. Moreover the zirconia ceramic shafts (24,26) are strongly resistant to chemicals like photographic emulsions and dyes and, therefore, do not contaminate product with corrosive materials.

REFERENCES:
patent: 3704968 (1972-12-01), Haupt
patent: 3881849 (1975-05-01), Commarmot et al.
patent: 5195881 (1993-03-01), George, Jr.
patent: 5411690 (1995-05-01), Ghosh et al.
patent: 5556270 (1996-09-01), Komine et al.

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