Measuring and testing – Sampler – sample handling – etc. – Capture device
Patent
1989-04-26
1990-08-14
Noland, Tom
Measuring and testing
Sampler, sample handling, etc.
Capture device
7386384, 7386386, G01N 114
Patent
active
049476963
ABSTRACT:
A pump for gas test tubes comprising two handle plates interconnected at respective ends by bellows and which are spring-biased in the direction of a suction sampling stroke. An inlet valve is constructed for the space enclosed in the bellows to insure that only non-manipulatable suction strokes with an exactly defined volume can be executed. For this purpose the inlet valve is arranged in the intake duct between the gas test tube and the interior of the bellows and closes in the direction toward the interior of the bellows. It can be opened by actuating the handle plates for the initiation of a complete sampling stroke and it remains open during the sampling stroke.
REFERENCES:
patent: 3446600 (1969-05-01), Wachter et al.
patent: 3759106 (1973-09-01), Wachter et al.
patent: 3782198 (1974-01-01), Wachter et al.
patent: 3861217 (1975-01-01), Rabenecker et al.
patent: 3901084 (1975-08-01), Breilsford
patent: 4574647 (1986-03-01), Molt
patent: 4610171 (1986-09-01), Nason
Dragerwerk Aktiengesellschaft
Noland Tom
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