Assignee
GRUNDFOS AS
DK59 patents
Top patents by PatentIndex Score
USD372719SAug 13, 1996
Water pump
GRUNDFOS AS122 citations98
US6548976B2Apr 15, 2003
Method for the commutation of a polyphase permanent magnet motor
GRUNDFOS AS87 citations96
US6326752B1Dec 4, 2001
Method for the commutation of a polyphase permanent magnet motor
GRUNDFOS AS94 citations96
US5332369AJul 26, 1994
Pump unit with cooling jacket for electric motor
GRUNDFOS AS59 citations96
US6208112B1Mar 27, 2001
Method for controlling a voltage/frequency converter controlled single-phase or polyphase electric motor
GRUNDFOS AS103 citations94
US7195462B2Mar 27, 2007
Method for controlling several pumps
GRUNDFOS AS63 citations93
US5598080AJan 28, 1997
Starting device for a single-phase induction motor
GRUNDFOS AS111 citations93
US6373728B1Apr 16, 2002
Frequency converter with an intermediate buck-boost converter for controlling an electric motor
GRUNDFOS AS90 citations92
US5714816AFeb 3, 1998
Electric motor
GRUNDFOS AS100 citations92
US4475873AOct 9, 1984
Wet-motor pump
GRUNDFOS AS41 citations92
US4465437AAug 14, 1984
Pump comprising a canned motor
GRUNDFOS AS35 citations92
US4447189AMay 8, 1984
Centrifugal pump for moving gaseous liquids
GRUNDFOS AS28 citations92
US6981399B1Jan 3, 2006
Method for detecting a differential pressure
GRUNDFOS AS62 citations91
US6322332B1Nov 27, 2001
Device for the external cooling of the electric drive motor of a centrifugal pump unit
GRUNDFOS AS20 citations91
US6085596AJul 11, 2000
Pressure sensor having an insulating layer and fluid tight amorphous metal layer
GRUNDFOS AS45 citations89
US6030709AFeb 29, 2000
Electronic component
GRUNDFOS AS44 citations89
US6022196AFeb 8, 2000
Submersible motor unit
GRUNDFOS AS23 citations88
US4518318AMay 21, 1985
Pumping sets
GRUNDFOS AS32 citations88
US6140725AOct 31, 2000
Wet-running submersible motor for driving a centrifugal pump
GRUNDFOS AS25 citations86
US7823456B2Nov 2, 2010
Pressure sensor
GRUNDFOS AS11 citations82
US7010984B2Mar 14, 2006
Differential pressure sensor
GRUNDFOS AS16 citations82
US4427421AJan 24, 1984
Device for separating gas out of liquids
GRUNDFOS AS20 citations80
US4484862ANov 27, 1984
Submersible pumps
GRUNDFOS AS20 citations79
US6273684B1Aug 14, 2001
Centrifugal pump unit
GRUNDFOS AS15 citations78
US4035701AJul 12, 1977
Method of stepwise speed control and three-phase squirrel-cage motor
GRUNDFOS AS20 citations78
US5975842ANov 2, 1999
Sensor arrangement
GRUNDFOS AS19 citations77
USD357687SApr 25, 1995
Pump housing
GRUNDFOS AS14 citations74
USD364172SNov 14, 1995
Pump
GRUNDFOS AS11 citations73
US4647228AMar 3, 1987
Height adjusting device for machines or machine elements
GRUNDFOS AS9 citations73
US4549849AOct 29, 1985
Pumping assemblies
GRUNDFOS AS14 citations73
US4358299ANov 9, 1982
Gas separator for liquid-conducting systems
GRUNDFOS AS12 citations73
US5807073ASep 15, 1998
Inline centrifugal pump
GRUNDFOS AS10 citations72
US7509866B2Mar 31, 2009
Pressure sensor
GRUNDFOS AS7 citations71
US5248085ASep 28, 1993
Gas boiler
GRUNDFOS AS8 citations71
US4436486AMar 13, 1984
Circulating pump unit
GRUNDFOS AS16 citations71
US8353676B2Jan 15, 2013
Method for determining faults during the operation of a pump unit
GRUNDFOS AS8 citations69
US7043395B2May 9, 2006
Method for detecting the magnetic flux the rotor position and/or the rotational speed
GRUNDFOS AS8 citations68
US4507583AMar 26, 1985
Piezo-electric level detector
GRUNDFOS AS16 citations67
US6746206B2Jun 8, 2004
Centrifugal pump
GRUNDFOS AS10 citations66
US4627792ADec 9, 1986
Rotating flow pump with a feed pump unit formed as an ejector
GRUNDFOS AS7 citations66
US7118347B2Oct 10, 2006
Method for activating an electric motor and a metering pump by supplying predetermined pulse intervals to supply predetermined fluid quantities
GRUNDFOS AS9 citations65
US7264450B2Sep 4, 2007
Pump unit and method for operating a pump unit
GRUNDFOS AS2 citations61
US7166974B2Jan 23, 2007
Method for controlling the firing angle of an electric motor
GRUNDFOS AS5 citations61
US7143650B2Dec 5, 2006
Pressure sensor
GRUNDFOS AS2 citations61
US4516915AMay 14, 1985
Pumping plant
GRUNDFOS AS18 citations60
US4042847AAug 16, 1977
Liquid-filled submersible electromotor
GRUNDFOS AS17 citations60
US7013738B2Mar 21, 2006
Flow sensor
GRUNDFOS AS2 citations59
US4404729ASep 20, 1983
Multi-spindle machine tools
GRUNDFOS AS4 citations59
US7713771B2May 11, 2010
Pressure sensor
GRUNDFOS AS5 citations56
US6729622B2May 4, 2004
Ready-to-mount axial face seal
GRUNDFOS AS5 citations55
Showing the top 50 of 59 patents by PatentIndex Score.