Multi-lobe pump for particle counters

Details Multi-lobe pump for particle counters Multi-lobe pump for particle counters

1997-10-06

2000-02-29

Rosenberger, Richard A.

Optics: measuring and testing

By particle light scattering

With photocell detection

G01N 2153

Patent

active

060316101

ABSTRACT:
A pump establishes gas flow in a particle counter. A pair of shafts having lobes is mounted in a first housing and serves to establish a gas flow path through a second housing which defines a view volume where particles are counted by light scattering or obscuration of a beam intersecting the light flow path. The lobes of the first housing do not contact each other or the walls of the housing, thereby limiting particles to those suspended in the gas flow.

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patent: 4638570 (1987-01-01), Soeters
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patent: 4768934 (1988-09-01), Soeters
patent: 4781541 (1988-11-01), Sohler et al.
patent: 4798465 (1989-01-01), Knollenberg
patent: 5039289 (1991-08-01), Eiermann et al.
patent: 5092675 (1992-03-01), Sommer
patent: 5320508 (1994-06-01), Kiefer
patent: 5600438 (1997-02-01), Kreikebaum et al.

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