Internal-combustion engines – Miscellaneous – Fuels – lubricants and additives
Reexamination Certificate
1998-12-11
2001-08-14
Kamen, Noah P. (Department: 3747)
Internal-combustion engines
Miscellaneous
Fuels, lubricants and additives
C123S1960AB
Reexamination Certificate
active
06273031
ABSTRACT:
BACKGROUND AND SUMMARY OF THE INVENTION
The invention relates to lubricant circulation systems, including for internal combustion engines, and more particularly to purge systems, replenishment systems, and combinations thereof.
The invention arose during continuing development efforts relating to the subject matter of commonly owned copending U.S. application Ser. No. 09/013,531, filed Jan. 26, 1998, U.S. Ser. No. 08/819,296, filed Mar. 18, 1997, U.S. Ser. No. 08/755,479, filed Nov. 22, 1996, and U.S. Pat. Nos. 5,779,900, 5,749,339, 5,462,679, all incorporated herein by reference. The '339 patent provides extended service intervals by providing continuous oil replacement and disposal. Periodic filter replacement and disposal is also provided. The oil replacement system tracks the engine's duty cycle.
In lubrication systems having a circulation system circulating lubricant to a machine, such as an internal combustion engine, customers and users are demanding increased competitive advantages, including reduced life-cycle costs, extended service intervals, reduced down time, reduced cost of replacement parts, reduced disposal costs, quicker service and cleaner service. Prior systems addressing such needs provide advantages enabling self-cleaning full-flow, and infrequent service, e.g. 10,000 hours, but suffer disadvantages including high initial cost, a centrifuge that requires cleaning every 1,000 to 2,000 hours, large and heavy structural components, and no oil replenishment. Other systems offer advantages including a permanent filter with no replacement parts needed, retrofit to current engine full-flow heads, and reasonable initial cost, but suffer disadvantages including no reduction of the service interval requirement, i.e., the filter and the centrifuge need cleaning, low efficiency wire mesh full-flow, and no oil replenishment.
The present invention addresses and solves the above noted needs, without the noted disadvantages.
REFERENCES:
patent: 3154485 (1964-10-01), Liddell
patent: 3425558 (1969-02-01), Rosaen
patent: 3432005 (1969-03-01), Gates
patent: 4256583 (1981-03-01), Lennartz
patent: 4421078 (1983-12-01), Hurner
patent: 4495909 (1985-01-01), Hurner
patent: 4636306 (1987-01-01), Radmall
patent: 4766860 (1988-08-01), Abe et al.
patent: 4923068 (1990-05-01), Crowson
patent: 4951784 (1990-08-01), Bedi
patent: 5024763 (1991-06-01), Schlaginhaufen
patent: 5062398 (1991-11-01), Bedi et al.
patent: 5145033 (1992-09-01), Bedi et al.
patent: 5223155 (1993-06-01), Ginn et al.
patent: 5249608 (1993-10-01), Hua
patent: 5353760 (1994-10-01), Zager
patent: 5390762 (1995-02-01), Nelson
patent: 5462679 (1995-10-01), Verdegan et al.
patent: 5476073 (1995-12-01), Betts
patent: 5562181 (1996-10-01), Elkin et al.
patent: 5565094 (1996-10-01), Zoch et al.
patent: 5566781 (1996-10-01), Robert et al.
patent: 5592395 (1997-01-01), Braun et al.
patent: 5674392 (1997-10-01), Christophe et al.
patent: 5676842 (1997-10-01), Bedi et al.
patent: 5685396 (1997-11-01), Elkin et al.
patent: 5720249 (1998-02-01), Betts et al.
patent: 5749339 (1998-05-01), Graham et al.
patent: 5779900 (1998-07-01), Holm et al.
patent: 5816212 (1998-10-01), Lindquist et al.
patent: 5957240 (1999-09-01), Apostolides
patent: 5964318 (1999-10-01), Boyle et al.
“Centinel, Advanced Engine Oil Management System”, Cummins Engine Co. Bulletin 3698966, Feb. 1997.
“Spinner II CS Cleanable Screen”, Glacier Metal Co., T.F. Hudgins, Bulletin 71804/15M, Nov. 1996.
“Eliminate Lube Oil Filter Disposal With Alfa Laval's Eliminator”, Sep. 1997.
“Cummins Eliminator Oil Filter™”, Bulletin 82297220, Sep. 22, 1997.
Fallon Stephen L.
Herman Peter K.
Schwandt Brian W.
Stehouwer David M.
Verdegan Barry M.
Andrus Sceales Starke & Sawall LLP
Huynh Hai
Kamen Noah P.
Nelson Industries Inc.
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