EP 0004120 B1 19830406 - GEAR-TYPE MACHINE WITH RELIEF MEANS FOR THE LIQUID IN THE INTERENGAGEMENT SPACE BETWEEN THE TEETH
Title (en)
GEAR-TYPE MACHINE WITH RELIEF MEANS FOR THE LIQUID IN THE INTERENGAGEMENT SPACE BETWEEN THE TEETH
Publication
Application
Priority
DE 2810563 A 19780310
Abstract (en)
[origin: US4290739A] In an external or internal gear pump or gear motor with one pair of helical spur gears, the trapping of fluid in the enclosed tooth cavity and the risk for cavitation in the said enclosed tooth cavity is considerably reduced by the shift of the pressure port connected and the suction port connected relief grooves at the leading lateral face of the helical gears in the direction of the suction port and the shift of the pressure port connected and suction port connected relief grooves at the lagging lateral face of the helical gears in the direction of the pressure port.
IPC 1-7
IPC 8 full level
F04C 2/08 (2006.01)
CPC (source: EP US)
F04C 2/088 (2013.01 - EP US)
Designated contracting state (EPC)
CH FR GB IT NL SE
DOCDB simple family (publication)
EP 0004120 A2 19790919; EP 0004120 A3 19791003; EP 0004120 B1 19830406; DE 2810563 A1 19790913; DE 2810563 C2 19821028; US 4290739 A 19810922
DOCDB simple family (application)
EP 79200119 A 19790309; DE 2810563 A 19780310; US 1871879 A 19790308