Inventor · disambiguated record
Siegfried Hertell
Also filed as: HERTELL SIEGFRIED
20 granted patents·383 citations·filing 1977–1987
96Inventor score
Top patents by PatentIndex Score
20 records- 0195US4648810AControl apparatus for a positive displacement reciprocating pumpBARMAG BARMER MASCHF·Filed 1985·Granted Mar 10, 1987·94 cites·7 claims
- 0285US4813853AInternal gear pumpBARMAG BARMER MASCHF·Filed 1987·Granted Mar 21, 1989·37 cites·11 claims
- 0381US4737087ADrive shaft seal for gear pump and methodBARMAG BARMER MASCHF·Filed 1985·Granted Apr 12, 1988·30 cites·13 claims
- 0477US4478562AOil lubrication of vacuum pump with pulsating oil feedBARMAG BARMER MASCHF·Filed 1982·Granted Oct 23, 1984·29 cites·14 claims
- 0576US4772185ARotary vane pump having a plurality of inlet and outlet slots in a rotating sleeveBARMAG BARMER MASCHF·Filed 1986·Granted Sep 20, 1988·26 cites·14 claims
- 0676US4604041ARotary vane pumpBARMAG BARMER MASCHF·Filed 1985·Granted Aug 5, 1986·26 cites·16 claims
- 0771US4523901AControl apparatus for a positive displacement reciprocating pumpBARMAG BARMER MASCHF·Filed 1982·Granted Jun 18, 1985·26 cites·11 claims
- 0869US4255098ARotary vane pump assemblyBARMAG BARMER MASCHF·Filed 1978·Granted Mar 10, 1981·17 cites·16 claims
- 0963US4515512ASeal for high pressure pump or the likeBARMAG BARMER MASCHF·Filed 1981·Granted May 7, 1985·21 cites·28 claims
- 1059US4231728ARotary vane pumpBARMAG BARMER MASCHF·Filed 1978·Granted Nov 4, 1980·8 cites·9 claims
- 1152US4462302AMotor fuel feed pumpBARMAG BARMER MASCHF·Filed 1981·Granted Jul 31, 1984·11 cites·9 claims
- 1252US4303091AHydraulic control apparatus for load independent flow regulationBARMAG BARMER MASCHF·Filed 1980·Granted Dec 1, 1981·12 cites·5 claims
- 1344US4164384ARotary vane vacuum pump with filter means for inletBARMAG BARMER MASCHF·Filed 1977·Granted Aug 14, 1979·7 cites·7 claims
- 1443US4770617AGear pump with leakage fluid intermittently communicated to expanding fluid cellsBARMAG BARMER MASCHF·Filed 1987·Granted Sep 13, 1988·8 cites·10 claims
- 1543US4355655AHydraulic control apparatus for load independent flow regulationBARMAG BARMER MASCHF·Filed 1981·Granted Oct 26, 1982·9 cites·2 claims
- 1640US4674964AGear pump having multiple outputsBARMAG BARMER MASCHF·Filed 1985·Granted Jun 23, 1987·6 cites·12 claims
- 1736US4850814AHydraulic gear pumpBARMAG BARMER MASCHF·Filed 1987·Granted Jul 25, 1989·5 cites·15 claims
- 1836US4459091ARotary vane pumpBARMAG BARMER MASCHF·Filed 1982·Granted Jul 10, 1984·2 cites·17 claims
- 1933US4780070AGear pump having multiple outputsBARMAG BARMER MASCHF·Filed 1987·Granted Oct 25, 1988·3 cites·4 claims
- 2033US4750867ARegulating pumpHERTELL SIEGFRIED·Filed 1986·Granted Jun 14, 1988·6 cites·10 claims
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