Global Patent Index - EP 1049876 A1

EP 1049876 A1 2000-11-08 - GEAR PUMP

Title (en)

GEAR PUMP

Title (de)

ZAHNRADPUMPE

Title (fr)

POMPE A ENGRENAGES

Publication

EP 1049876 A1 (DE)

Application

EP 98961048 A

Priority

  • DE 9803135 W
  • DE 19802137 A

Abstract (en)

[origin: DE19802137C1] A gear pump (11) comprising a gearwheel (14) with external toothing and an annular gear (15) with internal toothing which is guided into the cylindrical recess (18) of a housing (12) and which, together with the gearwheel (14), rotates around its own respective staggered axis. The inventive gear pump (11) is fitted with an aspirating hole (31) and a kidney-shaped pressure hole (32) in a first side wall of the housing defining the recess (18). A hollow cone-shaped indentation (38) is also provided in a second wall of the housing (12) opposite the pressure hole (32). The hollow cone (38) is fluidly connected to the pressure hole (32) and facilitates the formation of a fluid film between the annular ring (15) and the housing (12), thereby improving the gear pump's (11) resistance to wear.

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

F04C 2/10; F04C 15/00

IPC 8 full level (invention and additional information)

F04C 2/10 (2006.01); F04C 2/08 (2006.01); F04C 15/00 (2006.01); F04C 15/06 (2006.01)

CPC (invention and additional information)

F04C 15/06 (2013.01); F04C 2/086 (2013.01); F04C 15/0042 (2013.01)

Citation (search report)

See references of WO 9937922A1

Designated contracting state (EPC)

DE FR GB

DOCDB simple family

DE 19802137 C1 19990304; EP 1049876 A1 20001108; EP 1049876 B1 20020724; JP 2002501147 A 20020115; US 6280167 B1 20010828; WO 9937922 A1 19990729