Metal working – Method of mechanical manufacture – Process for making bearing or component thereof
Reexamination Certificate
2008-03-11
2008-03-11
Bryant, David P. (Department: 3726)
Metal working
Method of mechanical manufacture
Process for making bearing or component thereof
C029S898100, C029S898120, C184S005000, C384S100000
Reexamination Certificate
active
10902333
ABSTRACT:
A method of lubricating a wave bearing comprising application of an oil comprising a perfluoropolyether, derivatized perfluoropolyether, fluorosilicone, polychlorotrifluoroether, or polyphenyl ether, wherein the oil is capable of sustaining temperatures greater than 121° C., and at an operating speed of up to 1.4 million DN without decomposition.
REFERENCES:
patent: 3801505 (1974-04-01), Hong
patent: 4675452 (1987-06-01), Lagow et al.
patent: 5593230 (1997-01-01), Tempest et al.
patent: 5636708 (1997-06-01), Wedeven et al.
patent: 5954894 (1999-09-01), Tsushima
patent: 6024493 (2000-02-01), Tempest et al.
patent: 6541430 (2003-04-01), Beatty
patent: 6722135 (2004-04-01), Davis et al.
patent: 54021409 (1979-02-01), None
Dimofte, Florin; Proctor, Margaret P.; Keith, Theo G., Wave Fluid Film Bearing Tests for an Aviation Gearbox, Jan. 2000, NASA/TM-2000-209766.
Florin Dimofte, Wave Journal Bearing with Compressible Lubricant—Part 1: The Wave Bearing Concept and a Comparison to the Plain Circular Bearing, Presented at the 40thAnnual Meeting in Calgary, Alberta, Canada, May 17-20, 1993; Final manuscript approved Jan. 6, 1994; vol. 38(1995), I, 153-160 Tribology Transactions.
NASTEC, INC., Wave Bearings; http://www.nastecinc.com/wavebearing.htm; 2001.
Abstract—Optimization of a Hybrid Gas Wave Bearing for Oil-free Turbomachinery, S. Cioc, T.G. Keith, Jr. and C. GAC University of Toledo, Toledo, OH and F. Dimofte and D.P. Fleming, NASA GAC, Cleveland, OH; Society of Tribologists, Stle 2003 New York program, Apr. 28-May 1, 2003, New York Hilton.
Florin Dimofte, et al., Wave Fluid Film Bearing Tests for an Aviation Gearbox, NASA/TM 2000-209766; Cover Page; pp. 1-7 plus Report Documentation Page; Jan. 2000; Prepared for 8thInternational Symposium on Transport Phenomena and Dynamics of Rotating Machinery sponsored by Pacific Center for Thermal Fluids Engineering, Honolulu, Hawaii, Mar. 26-30, 2000.
Jim Liang et al.,A study of boundary lubrication thin films produced from a perfluoropolyalkylether fluid onM-50 surfaces, Tribology Letters 3 (1997) 107-112, J.C. Baltzer AG, Science Publishers, USA.
H.K. Trivedi et al.,Effect of temperature on tribological performance of a silicon nitride ball material with a linear perfluoropolyalkylether, Tribology Letters vol. 10, No. 3, 2001, Plenum Publishing Corporation, USA.
GLOBALSPEC The Engineering Search Engine, Canyon Engineering Products, Inc.—Product Announcements: Website: http://www.globalspec.com/Supplier/Product—Announcements/CanyonEngineering: downloaded Sep. 7, 2007.
AeroShell Turbine Oil 500 from Aircraft Spruce, Aircraft Spruce & Specialty Co., Worldwide Distributor of Aircraft Parts and Pilot Supplies;AeroShell Turbine Oil 500; Website: http://www.aircraftspruce.com/catalog/eppages/shell500.php; downloaded Sep. 7, 2007.
Synlubestechnology: EMERY® Synthetic Turbine Lubricants; Technical Data Sheet #248G—Jul. 2000; Website: www.cognis-us.com.
Bell Gregory Alan
Howell Jon L.
Afzali Sarang
Bryant David P.
E.I. du Pont de Nemours and Company
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