EP 4240973 A1 20230913 - VARIABLE DISPLACEMENT LUBRICANT PUMP
Title (en)
VARIABLE DISPLACEMENT LUBRICANT PUMP
Title (de)
SCHMIERMITTELPUMPE MIT VARIABLER VERDRÄNGUNG
Title (fr)
POMPE DE GRAISSAGE À CYLINDRÉE VARIABLE
Publication
Application
Priority
EP 2020081508 W 20201109
Abstract (en)
[origin: WO2022096134A1] A variable displacement lubricant pump (10), comprising a housing (12), a housing cover (16), a rotor hub (35), a shiftable control ring (15), provided with a variable eccentricity and a pumping chamber (25), wherein the pumping chamber (25) comprises a suction zone (S), a discharge zone (D) and a neutral zone (N), the neutral zone (N) is provided with a switchable pressure relief valve (50) to temporarily fluidically connect the suction opening (18) with the discharge opening (19) via the passing pumping compartment (40'), the pressure relief valve (50) comprises a valve opening (52) at the sidewall (13) of the housing (12) and a valve body (56) defined by the control ring (15), so that the valve opening (52) is not or partially covered by the control ring (15) at non-maximum-eccentricity values (eVn) and is completely covered by the control ring (15) at a maximum eccentricity value (eVmax).
IPC 8 full level
F04C 2/344 (2006.01); F01C 21/10 (2006.01); F04C 14/22 (2006.01); F04C 15/00 (2006.01)
CPC (source: EP)
F01C 21/108 (2013.01); F04C 2/3442 (2013.01); F04C 14/223 (2013.01); F04C 15/0042 (2013.01)
Citation (search report)
See references of WO 2022096134A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
DOCDB simple family (application)
EP 2020081508 W 20201109; EP 20803829 A 20201109