Title:
DIAPHRAGM PUMP WITH AT LEAST TWO DIAPHRAGMS
Document Type and Number:
Japanese Patent JPH0777162
Kind Code:
A
Abstract:
PURPOSE: To sufficiently exhaust the space between a pump chamber and an additional diaphragm in a diaphragm pump with at least two diaphragms.
CONSTITUTION: For this purpose, the elastically deformable annular zone 30 of an additional diaphragm 26 has a radial length longer than the deformable annular zone 24 of a working diaphragm 16, and the elastically deformable annular zone 30 of the additional diaphragm 26 has a channel-like convexity 31 which, in the undeformed condition of the diaphragm, points in the direction of an eccentric drive 7. An exhaust passage 39 for a diaphragm interspace 29 or a U packing ring interspace is provided in an intermediate casing 4.
Inventors:
EERITSUHI BETSUKAA
Application Number:
JP19972094A
Publication Date:
March 20, 1995
Filing Date:
August 24, 1994
Export Citation:
Assignee:
KNF NEUBERGER GMBH
International Classes:
F04B43/02; F04B39/04; F04B43/00; F04B45/04; (IPC1-7): F04B43/02; F04B45/04
Domestic Patent References:
| JP57120781B | ||||
| JP49125302B | ||||
| JPS59136585A | 1984-08-06 | |||
| JPH04224286A | 1992-08-13 |
Attorney, Agent or Firm:
Toshio Yano (2 outside)
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