EP 0550810 A3 19940323 -
Publication
Application
Priority
DE 4136805 A 19911108
Abstract (en)
[origin: JPH05240161A] PURPOSE: To obtain a double membrane pump having a smallest possible surface area contacting the product so as to cause least possible corrosion for the transfer of the highly purified product by sealing two product chambers from compression medium chambers with two membranes and supplying a transferring medium to compression medium chambers alternately under control. CONSTITUTION: A suction valve 2, a pressure valve 3 and a suction connection pipe 4, and coaxial product chambers 6 connected to the suction valve 2 and pressure valve 3 are arranged in a central housing 1. The product chambers 6 are sealed by membranes 7 forming compression medium chambers 8. The membrane 7 has two annular toruses 9, 10 which are displaceable peripherally oppositely and radially. A piston rod 13 screwed in the central region of the membrane 7 is guided by a guide 15 via a bush 14 and sealed by a packing 16. When compressed air is supplied to the compression medium chambers 8 via a compressed air pipe 22, the product in one product chamber 6 is pressed and transferred, on the other hand, product is attracted to the expanded left product chamber.
IPC 1-7
IPC 8 full level
F04B 9/135 (2006.01); F04B 11/00 (2006.01); F04B 43/00 (2006.01); F04B 43/02 (2006.01); F04B 43/073 (2006.01)
CPC (source: EP US)
F04B 9/135 (2013.01 - EP US); F04B 43/0009 (2013.01 - EP US); F04B 43/0054 (2013.01 - EP US); F04B 43/0736 (2013.01 - EP US)
Citation (search report)
- [A] US 2667129 A 19540126 - GRANER FRANK L
- [A] EP 0304210 A2 19890222 - ARO CORP [US]
- [Y] EP 0258541 A2 19880309 - NIPPON PILLAR PACKING [JP]
- [A] EP 0308541 A1 19890329 - KABUSHIKIKAISHA YAMADA CORP [JP]
- [A] WO 8404636 A1 19841122 - MILLICOM INC [US]
- [Y] EP 0214394 A2 19870318 - BECKER ERICH [DE]
- [A] SE 8406306 A
- [Y] EP 0353462 A1 19900207 - LECHLER ELRING DICHTUNGSWERKE [DE]
- [Y] DE 1017914 B 19571017 - HEINRICH SCHROEDER, et al
- [A] EP 0280070 A2 19880831 - DEPA VERFAHRENSTECH GMBH [DE]
- [A] GB 2144517 A 19850306 - FLYNN L W & CO LTD
- [A] FR 1418442 A 19651119 - ANNOVI & REVERBERI
- [A] US 3461808 A 19690819 - NELSON LOWELL F, et al
- [A] GB 2079858 A 19820127 - PATAY PUMPS LTD
- [X] PATENT ABSTRACTS OF JAPAN vol. 9, no. 46 (M-360)(1769) 27. Februar 1985 & JP-A-59 185884 (YAMADA YUKI SEIZOU)
- [A] PATENT ABSTRACTS OF JAPAN vol. 11, no. 352 (M-643)18. November 1987 & JP-A-62 131988 (NIPPON VALQUA)
- [A] PATENT ABSTRACTS OF JAPAN, Band 5, Nr. 135 (M-85) 27. August 1981; & JP-A-56 069 444 (NAKADA HIROSHIMA)
- [A] PATENT ABSTRACTS OF JAPAN, Band 11, Nr. 172 (M-595) 3. Juni 1987; & JP-A-62 004 967 (HINO MOTORS) 10-01-1987
- [A] PATENT ABSTRACTS OF JAPAN, Band 10, Nr. 365 (M-542) 6. December 1986; & JP-A-61 160 666 (NIPPON VALQUA) 21-07-1986
- [A] PATENT ABSTRACTS OF JAPAN, Band 16, Nr. 339 (M-1284) 22. Juli 1992; & JP-A-04 101078 (MATSUSHITA) 02-04-1992
Designated contracting state (EPC)
AT BE CH DK ES FR GB IT LI NL SE
DOCDB simple family (publication)
DE 4136805 A1 19930513; DE 4136805 C2 19930812; EP 0550810 A2 19930714; EP 0550810 A3 19940323; JP H05240161 A 19930917; US 5261798 A 19931116
DOCDB simple family (application)
DE 4136805 A 19911108; EP 92118863 A 19921104; JP 29727292 A 19921106; US 96809592 A 19921029