Source: http://www.google.com/patents/US5896832?ie=ISO-8859-1
Timestamp: 2015-03-27 23:13:57
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Matched Legal Cases: ['application No. 08', 'application No. 08', 'application No. 08', 'application No. 08', 'application No. 08', 'application No. 08', 'application No. 08', 'application No. 08', 'application No. 08', 'application No. 08', 'application No. 08', 'application No. 08']

Patent US5896832 - Viscous fluid heat generator - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA viscous fluid heat generator includes: a shear chamber in which viscous fluid is contained and heat is generated by shearing the viscous fluid with a rotor rotating therein; and a space receiving viscous fluid drained from the shear chamber. The heat generator is rotated always as far as an engine...http://www.google.com/patents/US5896832?utm_source=gb-gplus-sharePatent US5896832 - Viscous fluid heat generatorAdvanced Patent SearchPublication numberUS5896832 APublication typeGrantApplication numberUS 08/967,547Publication dateApr 27, 1999Filing dateNov 10, 1997Priority dateNov 20, 1996Fee statusLapsedAlso published asDE69710682D1, EP0844445A1, EP0844445B1Publication number08967547, 967547, US 5896832 A, US 5896832A, US-A-5896832, US5896832 A, US5896832AInventorsShinji Aoki, Toshio Morikawa, Hajime ItoOriginal AssigneeDenso CorporationExport CitationBiBTeX, EndNote, RefManPatent Citations (11), Non-Patent Citations (12), Referenced by (4), Classifications (6), Legal Events (7) External Links: USPTO, USPTO Assignment, EspacenetViscous fluid heat generator
The rotor 111 is disposed in the shear chamber 110 so that narrow gaps of about 0.25 mm thick are formed between the rotor 111 and the fin plates at both sides of the rotor 111. Through-holes 119 which serve to enhance shearing force (explained later) are formed on the rotor 111. The front and rear fin plates 105 and 106 have respective fins 108 and 109 formed thereon. The height of the fins 108 and 109 is about 10 mm, and the interval space between neighboring fins is about 3 �4 mm. The intervals between the fins constitute passages 140 for engine coolant.
The viscous fluid used in the heat generator must have a high viscosity, and the viscosity must not be decreased at a high temperature. In this particular embodiment, silicone oil is used which has a viscosity of 12,000�30,000 cst (centi-stokes) and is heat-resistant up to about 200� C.
A space 170 for containing the viscous fluid dripped down from the shear chamber 110 is provided at a lower part of the front housing 101. The space 170 are connected with the shear chamber 110 through a dripping passage 171. A piston 172 is disposed in the space 170 so that the volume of the space 170 is changed by axially sliding the piston 172. An O-ring 173 is disposed to encircle the piston 172 in the bore of the space 170 to keep the space 170 liquid-tight. The piston 172 is connected to an actuator 175 disposed at a bottom portion of the rear housing 102. The actuator 175 drives the piston 172 back and forth in the axial direction in the space 170. The actuator includes a cylinder 176 which contains thermo-wax therein. At a predetermined temperature, for example, 70� C., the thermo-wax expands abruptly and pushes the piston 172 leftward, thereby decreasing the volume of the space 170.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS4387701 *Feb 11, 1980Jun 14, 1983Gibbons Edwin EFluid friction furnaceUS4974778 *Jul 24, 1989Dec 4, 1990Robert Bosch GmbhHeating system for occupant spaces in power vehicles with liquid-cooled internal combustion enginesUS4993377 *Mar 5, 1990Feb 19, 1991Aisin Seiki Kabushiki KaishaAutomobile heating apparatus and heat generator for the sameUS5743467 *Nov 12, 1996Apr 28, 1998Kabushiki Kaisha Toyoda Jidoshokki SeisakushoAutomobile heating systemUS5752499 *Sep 5, 1996May 19, 1998Kabushiki Kaisha Toyoda Jidoshokki SeisakushoVariable capacity type viscous heaterUS5791558 *Nov 5, 1996Aug 11, 1998Kabushiki Kaisha Toyoda Jidoshokki SeisakushoHeating system for vehicleEP0361053B1 *Aug 16, 1989Jan 5, 1994Robert Bosch GmbhHeating device for the interior of a fluid-cooled internal-combustion engine of an automotive vehicleEP0773122A2 *Nov 12, 1996May 14, 1997Kabushiki Kaisha Toyoda Jidoshokki SeisakushoAutomobile heating systemEP0800942A1 *Oct 31, 1996Oct 15, 1997Kabushiki Kaisha Toyoda Jidoshokki SeisakushoVariable capacity viscous heaterJPH0357877A * Title not availableJPH0398107U * Title not available* Cited by examinerNon-Patent CitationsReference1 *U.S. application No. 08/835,311, Ban, filed Apr. 7, 1997.2 *U.S. application No. 08/862,866, Aoki et al., filed May 23, 1997.3 *U.S. application No. 08/886,667, Aoki et al., filed Jul. 1, 1997.4 *U.S. application No. 08/892,411, Ito et al., filed Jul. 14, 1997.5 *U.S. application No. 08/898,536, Aoki et al., filed Jul. 22, 1996.6 *U.S. application No. 08/901,370, Ito, filed Jul. 28, 1997.7 *U.S. application No. 08/915,155, Aoki et al., filed Aug. 20, 1997.8 *U.S. application No. 08/933,295, Inoue et al., filed Sep. 18, 1997.9 *U.S. application No. 08/935,179, Aoki et al., filed Sep. 22, 1997.10 *U.S. application No. 08/936,257, Aoki et al., filed Sep. 24, 1997.11 *U.S. application No. 08/937,049, Aoki et al., Sep. 24, 1997.12 *U.S. application No. 08/937,050, Aoki et al., filed Sep. 24, 1997.* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS6227452Jan 29, 2000May 8, 2001Daimlerchrysler CorporationCombined assembly for a power steering pump and a viscous heaterUS6288390Mar 7, 2000Sep 11, 2001Scripps Research InstituteDesorption/ionization of analytes from porous light-absorbing semiconductorUS7686146Sep 27, 2006Mar 30, 2010Denso International America, Inc.Combination viscous fan drive and viscous heat deviceUS7841189 *Jun 13, 2008Nov 30, 2010Laboratorios Cair Espana, S.L.Device for adjusting the temperature of a physiological fluid* Cited by examinerClassifications U.S. Classification122/26, 126/247, 123/142.50RInternational ClassificationF24J3/00Cooperative ClassificationF24J3/003European ClassificationF24J3/00BLegal EventsDateCodeEventDescriptionJun 14, 2011FPExpired due to failure to pay maintenance feeEffective date: 20110427Apr 27, 2011LAPSLapse for failure to pay maintenance feesNov 29, 2010REMIMaintenance fee reminder mailedSep 29, 2006FPAYFee paymentYear of fee payment: 8Aug 29, 2002FPAYFee paymentYear of fee payment: 4Dec 28, 1999CCCertificate of correctionNov 10, 1997ASAssignmentOwner name: DENSO CORPORATION, JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:AOKI, SHINJI;MORIKAWA, TOSHIO;ITO, HAJIME;REEL/FRAME:008877/0925;SIGNING DATES FROM 19971017 TO 19971020RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services