Global Patent Index - EP 0920588 B1

EP 0920588 B1 2003-06-11 - MEDICAL GEAR PUMP FOR SUCTIONING AND RINSING

Title (en)

MEDICAL GEAR PUMP FOR SUCTIONING AND RINSING

Title (de)

MEDIZINISCHE ZAHNRADPUMPE ZUM SAUGEN UND SPÜLEN

Title (fr)

POMPE A ENGRENAGE MEDICALE POUR ASPIRER ET RINCER

Publication

EP 0920588 B1 (DE)

Application

EP 98939503 A

Priority

  • DE 19725462 A
  • EP 9803601 W

Abstract (en)

[origin: DE19725462A1] The invention relates to a medical gear pump (10) for suctioning and rinsing, specially for endoscopic or laboratory purposes. The inventive device has two engaging toothed gears (42, 44) serving as conveyor elements. One of said gears (42) is connected to a drive unit. The toothed gears (42, 44) have no journal bearings and are accommodated in openings (38, 40). Each toothed gear (42, 44) has helical gearing. According to the invention, the helical gearing is configured in such a way that, when seen from its sheath line, at least two tip/base rests of the engaging toothed gears (42, 44) are provided, and the contour of the tooth gaps of one of the toothed gears is configured to match the teeth of the other toothed gear so that when a tooth is fully inserted into the gap, its tip fills said gap radially inside the pitch circle in an almost complete manner (Fig. 3).

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

F04C 2/16; F04C 2/08

IPC 8 full level (invention and additional information)

F04C 2/08 (2006.01); F04C 2/16 (2006.01); F04C 14/26 (2006.01)

CPC (invention and additional information)

F04C 14/26 (2013.01); F04C 2/084 (2013.01); F04C 2/16 (2013.01)

Designated contracting state (EPC)

DE FR GB IT

DOCDB simple family

DE 19725462 A1 19981224; EP 0920588 A1 19990609; EP 0920588 B1 20030611; US 6361289 B1 20020326; WO 9858174 A1 19981223