Global Patent Index - EP 0983440 A1

EP 0983440 A1 2000-03-08 - RECIPROCATING DIAPHRAGM PUMP WITH PACKLESS PISTON-CYLINDER UNIT

Title (en)

RECIPROCATING DIAPHRAGM PUMP WITH PACKLESS PISTON-CYLINDER UNIT

Title (de)

KOLBENMEMBRANPUMPE MIT DICHTUNGSLOSER KOLBEN-ZYLINDEREINHEIT

Title (fr)

POMPE A MEMBRANE A PISTON AVEC UNITE PISTON-CYLINDRE SANS GARNITURE

Publication

EP 0983440 A1 (DE)

Application

EP 98929297 A

Priority

  • DE 29708906 U
  • EP 9802766 W

Abstract (en)

[origin: WO9853208A1] The invention relates to a solution for sealing the piston-cylinder unit (1, 2) of reciprocating diaphragm pumps which ensures that said piston-cylinder unit (1, 2) is permanently and reliably sealed while being simple to assemble. To this end the invention provides for a piston-cylinder unit (1, 2) which presents almost no play in the micrometer ( mu m) range and which is sealed by hydrodynamically sealing the slot (3).

IPC 1-7 (main, further and additional classification)

F04B 53/12; F04B 23/06

IPC 8 full level (invention and additional information)

F04B 13/00 (2006.01); F04B 23/06 (2006.01); F04B 53/00 (2006.01)

CPC (invention and additional information)

F04B 23/06 (2013.01); F04B 13/00 (2013.01); F04B 53/008 (2013.01); F05C 2203/0804 (2013.01)

Citation (search report)

See references of WO 9853208A1

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB GR IE IT LI NL PT SE

EPO simple patent family

WO 9853208 A1 19981126; AT 212697 T 20020215; AU 736918 B2 20010809; AU 7911498 A 19981211; DE 29708906 U1 19970717; EP 0983440 A1 20000308; EP 0983440 B1 20020130; NZ 501200 A 20010629; US 6299419 B1 20011009

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