Assignee
IWAKI CO LTD
34 granted patents·6 pending applications·728 citations·filing 1975–2022
Top patents by PatentIndex Score
40 records- 0195US7683514B2Hybrid magnetic bearingIWAKI CO LTD·Filed 2006·Granted Mar 23, 2010·30 cites·7 claims
- 0293US4013384AMagnetically driven centrifugal pump and means providing cooling fluid flowIWAKI CO LTD·Filed 1975·Granted Mar 22, 1977·159 cites·7 claims
- 0392US4047847AMagnetically driven centrifugal pumpIWAKI CO LTD·Filed 1976·Granted Sep 13, 1977·139 cites·15 claims
- 0489US6874997B2Pump system using a control fluid to drive a switching valve mechanism for an actuating fluidIWAKI CO LTD·Filed 2002·Granted Apr 5, 2005·40 cites·10 claims
- 0587US6443710B1Magnetic pumpIWAKI CO LTD·Filed 2000·Granted Sep 3, 2002·64 cites·9 claims
- 0684US7249939B2Rear casing arrangement for magnetic drive pumpIWAKI CO LTD·Filed 2003·Granted Jul 31, 2007·41 cites·6 claims
- 0783US6302660B1Tube pump with flexible tube diaphragmIWAKI CO LTD·Filed 2000·Granted Oct 16, 2001·52 cites·7 claims
- 0880US5464333AMagnet pump with rear thrust bearing memberIWAKI CO LTD·Filed 1994·Granted Nov 7, 1995·50 cites·7 claims
- 0980US5165866ABellows pumpIWAKI CO LTD·Filed 1991·Granted Nov 24, 1992·43 cites·8 claims
- 1077US10550835B2Duplex reciprocating pumpIWAKI CO LTD·Filed 2016·Granted Feb 4, 2020·2 cites·6 claims
- 1176US11105321B2Plunger pump having a rotatable plunger with cut face disposed in a cylinder wherein the cylinder includes a main body and a spacer section with the spacer section having a greater length in an axial direction than the maximum stroke length of the plungerIWAKI CO LTD·Filed 2018·Granted Aug 31, 2021·3 cites·9 claims
- 1273US6814553B2Dual reciprocating bellows pump, with a pair of interlocking shafts passing through a common pump head and dual pump chambersIWAKI CO LTD·Filed 2002·Granted Nov 9, 2004·14 cites·4 claims
- 1372US11313362B2Tubephragm pumpIWAKI CO LTD·Filed 2020·Granted Apr 26, 2022·1 cites·20 claims
- 1472US7977838B2Magnetic levitation motor and pumpIWAKI CO LTD·Filed 2008·Granted Jul 12, 2011·4 cites·9 claims
- 1569US7800269B2Hybrid magnetic bearingIWAKI CO LTD·Filed 2009·Granted Sep 21, 2010·3 cites·4 claims
- 1667US4272225AElectromagnetically-operated fixed displacement pumpIWAKI CO LTD·Filed 1979·Granted Jun 9, 1981·25 cites·11 claims
- 1765US10890190B2Magnetic pumpIWAKI CO LTD·Filed 2013·Granted Jan 12, 2021·2 cites·6 claims
- 1856US10941868B2Valve seat and valve structureIWAKI CO LTD·Filed 2016·Granted Mar 9, 2021·0 cites·6 claims
- 1954US12467452B2Mounting structure for diaphragm and retainerIWAKI CO LTD·Filed 2022·Granted Nov 11, 2025·0 cites·12 claims
- 2054USD296556SBellows pumpIWAKI CO LTD·Filed 1986·Granted Jul 5, 1988·7 cites·1 claims
- 2152US2025270987A1Pump deviceIWAKI CO LTD·Filed 2022·Application pending·0 cites
- 2251US2025109746A1Pump device and valve moduleIWAKI CO LTD·Filed 2022·Application pending·0 cites
- 2350US11876431B2Magnetic bearing, drive device equipped with the same, and pumpIWAKI CO LTD·Filed 2020·Granted Jan 16, 2024·0 cites·11 claims
- 2447US12352279B2Rotary drive device and pumpIWAKI CO LTD·Filed 2021·Granted Jul 8, 2025·0 cites·12 claims
- 2547USD300034SBellows pumpIWAKI CO LTD·Filed 1986·Granted Feb 28, 1989·5 cites·1 claims
- 2647US2005191195A1Dual reciprocating bellows pump with interlock shaft meansIWAKI CO LTD·Filed 2005·Application pending·0 cites
- 2746US6966339B2Spool valve arrangementIWAKI CO LTD·Filed 2003·Granted Nov 22, 2005·3 cites·4 claims
- 2845US5477881ATank for pumpIWAKI CO LTD·Filed 1994·Granted Dec 26, 1995·13 cites·6 claims
- 2944US11313365B2Reciprocating pump designed for preventing valves from being assembled erroneouslyIWAKI CO LTD·Filed 2016·Granted Apr 26, 2022·0 cites·8 claims
- 3044US11098711B2Pump deviceIWAKI CO LTD·Filed 2016·Granted Aug 24, 2021·0 cites·18 claims
- 3144US2004265149A1Bellows pump with flexible partition membraneIWAKI CO LTD·Filed 2004·Application pending·0 cites
- 3244US2011091340A1Reciprocating pump and check valveIWAKI CO LTD·Filed 2010·Application pending·0 cites
- 3342US2020102948A1Reciprocating pumpIWAKI CO LTD·Filed 2019·Application pending·0 cites
- 3441US10704547B2Volume pump including a bellows and a suction valve and a discharge valve wherein the valves comprise a valve seat and a valve body and wherein a fixed section of the valve body includes a communicating flow pathIWAKI CO LTD·Filed 2015·Granted Jul 7, 2020·0 cites·11 claims
- 3541US6843645B2Cooling system for a magnetic pumpIWAKI CO LTD·Filed 2001·Granted Jan 18, 2005·3 cites·4 claims
- 3641US4684333ASelf-priming pumpIWAKI CO LTD·Filed 1986·Granted Aug 4, 1987·11 cites·12 claims
- 3740US12345270B2PumpIWAKI CO LTD·Filed 2020·Granted Jul 1, 2025·0 cites·13 claims
- 3840USD361822STank used for pumpIWAKI CO LTD·Filed 1994·Granted Aug 29, 1995·5 cites·1 claims
- 3936US5330330AElectromagnetically operated fixed displacement pumpIWAKI CO LTD·Filed 1993·Granted Jul 19, 1994·9 cites·8 claims
- 4033US10711779B2Plunger pumpIWAKI CO LTD·Filed 2017·Granted Jul 14, 2020·0 cites·9 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →