Pumps – With condition responsive control of coolant or lubricant
Reexamination Certificate
2008-06-20
2011-12-13
Kramer, Devon C (Department: 3746)
Pumps
With condition responsive control of coolant or lubricant
Reexamination Certificate
active
08075283
ABSTRACT:
A compressor system includes a first compressor, which has a first low side oil sump, in a first shell and a second compressor, which has a second low side oil sump, in a second shell. The first and second compressors are connected in series. There is an oil transfer conduit connected between the first low side sump of the first compressor and the second low side sump of the second compressor. The system also includes a normally open check valve in the oil transfer conduit. Additionally, a bleed is provided to effect oil transfer via the oil transfer conduit when the normally open valve is closed.
REFERENCES:
patent: 2076332 (1937-04-01), Zercher
patent: 2243541 (1941-05-01), Swart
patent: 2352581 (1944-06-01), Winkler
patent: 2646212 (1953-07-01), Kellie
patent: 2663164 (1953-12-01), Kurtz
patent: 2938361 (1960-05-01), McNatt
patent: 3072318 (1963-01-01), Berger et al.
patent: 3074249 (1963-01-01), Henderson
patent: 3226949 (1966-01-01), Gamache
patent: 3237852 (1966-03-01), Shaw
patent: 3241746 (1966-03-01), Shaw
patent: 3243101 (1966-03-01), Shaw
patent: 3360958 (1968-01-01), Miner
patent: 3377816 (1968-04-01), Berger
patent: 3465953 (1969-09-01), Shaw
patent: 3500962 (1970-03-01), Kocher
patent: 3543880 (1970-12-01), Scott
patent: 3581519 (1971-06-01), Garrett et al.
patent: 3719057 (1973-03-01), Grant
patent: 3775995 (1973-12-01), Conley et al.
patent: 3785169 (1974-01-01), Gylland, Jr.
patent: 3852974 (1974-12-01), Brown
patent: 3859815 (1975-01-01), Kasahara
patent: 3984050 (1976-10-01), Gustafsson
patent: 4180236 (1979-12-01), Saarem et al.
patent: 4197719 (1980-04-01), Shaw
patent: 4205537 (1980-06-01), Dubberley
patent: 4236876 (1980-12-01), Fraser et al.
patent: 4268291 (1981-05-01), Cann
patent: 4306420 (1981-12-01), Cann
patent: 4332144 (1982-06-01), Shaw
patent: 4439121 (1984-03-01), Shaw
patent: 4530215 (1985-07-01), Kramer
patent: 4594858 (1986-06-01), Shaw
patent: 4748820 (1988-06-01), Shaw
patent: 4753083 (1988-06-01), Sato
patent: 4787211 (1988-11-01), Shaw
patent: 4833893 (1989-05-01), Morita
patent: 4870831 (1989-10-01), Kitamoto
patent: 4895498 (1990-01-01), Basseggio
patent: 4947655 (1990-08-01), Shaw
patent: 5062274 (1991-11-01), Shaw
patent: 5094085 (1992-03-01), Irino
patent: 5094598 (1992-03-01), Amata et al.
patent: 5095712 (1992-03-01), Narreau
patent: 5123254 (1992-06-01), Inoue et al.
patent: 5191776 (1993-03-01), Severance et al.
patent: 5220806 (1993-06-01), Jaster et al.
patent: 5236311 (1993-08-01), Lindstrom
patent: 5303561 (1994-04-01), Bahel et al.
patent: 5410889 (1995-05-01), Sjoholm et al.
patent: 5626027 (1997-05-01), Dormer et al.
patent: 5634345 (1997-06-01), Alsenz
patent: 5657637 (1997-08-01), Mertens
patent: 5839886 (1998-11-01), Shaw
patent: 5894739 (1999-04-01), Temos
patent: 5927088 (1999-07-01), Shaw
patent: 6276148 (2001-08-01), Shaw
patent: 0 106 414 (1984-04-01), None
patent: 0 715 077 (1996-06-01), None
patent: 57168082 (1982-10-01), None
patent: 58217162 (1983-12-01), None
patent: 59191856 (1984-10-01), None
patent: 6-213170 (1994-08-01), None
patent: WO 97/32168 (1997-09-01), None
International Search Report with Written Opinion, PCT/US2005/034651, Date Mailed Feb. 26, 2006.
Second Edition—“Application of Thermodynamics”; Author: Bernard D. Wood; 1982 by Bernard D. Wood; 1991 reissued by Waveland Presss, Inc.; pp. 218-222.
A Technical Handbook from SWEP; “Compact Brazed Heat Exchangers for Refrigerant Applications”; 1993; 1 pages plus cover and back sheets.
“Modern Refrigerating Machines”; Author; I. Cerepnalkovski; Elsevier Science Publishers; 1991; pp. 47-48.
“Refrigeration Principles and Systems—An Energy Approach”; Author: Edward G. Pits; Business News Publishing Company; 1991; pp. 243-245.
“Survey and Comparison of Interstage Cooling Systems for Two-Stage Compression”; Data Sheet, No. 20; May 1979; 3 pgs.
“Standard Refrigeration and Air Conditioning Questions & Answers—Third Edition”; Authors: S. M. Elonka and Q.W. Minich; McGraw-Hill, Inc.; 1983, 1973, 1961; pp. 28-31, 50-53.
“Thermal Environment Engineering—Second Edition”; Author: James L. Threlkeld; Prentice-Hall, Inc.; 1970, 1962; pp. 61-70.
“Theory of Mechanical Refrigeration”; Author: N.R. Sparks; McGraw-Hill Book Company, Inc.; 1938; pp. 111-127.
Bayou Amene
Hallowell International, LLC
Kramer Devon C
LandOfFree
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