Inventor · disambiguated record
Harold K. Haavik
Also filed as: HAAVIK HAROLD · HAAVIK HAROLD K
15 granted patents·410 citations·filing 1975–2000
95Inventor score
Top patents by PatentIndex Score
15 records- 0190US5100300ALiquid ring pumps having rotating lobe liners with end wallsNASH ENGINEERING CO·Filed 1990·Granted Mar 31, 1992·61 cites·14 claims
- 0287US5197863ABearing fluid distribution systems for liquid ring pumps with rotating lobe linersNASH ENGINEERING CO·Filed 1992·Granted Mar 30, 1993·56 cites·26 claims
- 0386US5295794ALiquid ring pumps with rotating linersNASH ENGINEERING CO·Filed 1993·Granted Mar 22, 1994·39 cites·67 claims
- 0483US6394777B2Cooling gas in a rotary screw type pumpNASH ENGINEERING CO·Filed 2000·Granted May 28, 2002·22 cites·17 claims
- 0580US5217352ATwo-stage liquid ring pump with rotating liner in first stage supported by liquid from second stageNASH ENGINEERING CO·Filed 1992·Granted Jun 8, 1993·36 cites·12 claims
- 0678US4050851ALiquid ring pumps and compressors using a ferrofluidic ring liquidNASH ENGINEERING CO·Filed 1975·Granted Sep 27, 1977·29 cites·10 claims
- 0776US5653582AFluid bearing pad arrangement for liquid ring pump systemsNASH ENGINEERING CO·Filed 1995·Granted Aug 5, 1997·34 cites·19 claims
- 0875US5370502ALiquid ring pumps with pressurized gas supported rotating linersNASH ENGINEERING CO·Filed 1993·Granted Dec 6, 1994·27 cites·13 claims
- 0969US5961295AMixed flow liquid ring pumpsNASH ENGINEERING CO·Filed 1997·Granted Oct 5, 1999·24 cites·6 claims
- 1062US4613283ALiquid ring compressorsNASH ENGINEERING CO·Filed 1985·Granted Sep 23, 1986·17 cites·9 claims
- 1162US4323334ATwo stage liquid ring pumpNASH ENGINEERING CO·Filed 1980·Granted Apr 6, 1982·17 cites·9 claims
- 1261US5114310ACentrifugal pump with sealing meansAHLSTROEM OY·Filed 1990·Granted May 19, 1992·20 cites·15 claims
- 1354US4334830ATwo-stage liquid ring pump with improved intrastage and interstage sealing meansNASH ENGINEERING CO·Filed 1980·Granted Jun 15, 1982·14 cites·9 claims
- 1448US4422832ALiquid ring pump with vanes in liquid ringNASH ENGINEERING CO·Filed 1981·Granted Dec 27, 1983·10 cites·15 claims
- 1530US4172694ALong liquid ring pumps and compressorsNASH ENGINEERING·Filed 1977·Granted Oct 30, 1979·4 cites·16 claims
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