Title:
【発明の名称】ガス検知管用のベローズポンプ
Document Type and Number:
Japanese Patent JPH0726894
Kind Code:
B2
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.
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Inventors:
Ky Wouve Hue Lawell
Application Number:
JP16550089A
Publication Date:
March 29, 1995
Filing Date:
June 29, 1989
Export Citation:
Assignee:
Dräger Werck Actien Gezershyaft
International Classes:
F04B7/00; F04B33/00; F04B45/02; G01N1/24; (IPC1-7): G01N1/24; F04B33/00; F04B45/02
Domestic Patent References:
| JP4833892A | ||||
| JP494592A | ||||
| JP5551317A | ||||
| JP58165653U | ||||
| JP4854106U |
Other References:
【文献】米国特許4574647(US,A)
Attorney, Agent or Firm:
Toshio Yano (1 outside)
Next Patent: バスドラム用フープ