US5417872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricant composition, refrigeration apparatus containing same and process for operating the apparatus
Assignee: Hitachi Ltd
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Filing: 1993-03-17
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Granted: 1995-05-23
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Expires: 2013-03-17
Abstract
Abstract A lubricant composition comprising as a base oil one or more ester oils, alkylbenzene oils and mineral oils, and a glycidyl ether compound having at least two epoxy groups is miscible in hydrofluorocarbon and hydrochlorofluorocarbon refrigerants such as R134a, etc. as replacing refrigerants of R12 and provides a stable operation of refrigeration compressor for a long period of time without causing corrosion and wear of a sliding portion of the compressor.
Inventors
- 👤 Katsumi Fukuda
- 👤 Tadashi Iizuka
- 👤 Reishi Naka
- 👤 Hiroaki Hata
- 👤 Masahiko Gommori
- 👤 Yoshiharu Homma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:45
CPC Classifications
C; C10; C10M; C10M5/00; C10M129/00; C10M129/02; C10M129/16; C10M129/18; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/041; C09K5/044; C09K5/045; C10M101/00; C10M101/02; C10M105/00; C10M105/02; C10M105/06; C10M105/08; C10M105/32; C10M105/38; C10M105/42; C10M129/04; C10M129/10; C10M129/20; C10M129/66; C10M133/00; C10M133/02; C10M133/38; C10M133/44; C10M133/46; C10M145/00; C10M145/18; C10M145/24; C10M145/26; C10M145/36; C10M169/00; C10M169/04; C10M169/041; C10M169/044; C10M171/00; C10M171/008; C09K2205/00; C09K2205/24; C09K2205/40; C09K2205/42; C10M2203/00; C10M2203/06; C10M2203/065; C10M2203/10; C10M2203/1006; C10M2203/102; C10M2203/1025; C10M2203/104; C10M2203/1045; C10M2203/106; C10M2203/1065; C10M2203/108; C10M2203/1085; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/026; C10M2207/027; C10M2207/04; C10M2207/042; C10M2207/044; C10M2207/10; C10M2207/24; C10M2207/28; C10M2207/2805; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/2835; C10M2207/286; C10M2207/30; C10M2207/301; C10M2207/34; C10M2207/345; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/108; C10M2211/00; C10M2211/02; C10M2211/022; C10M2211/06; C10M2215/00; C10M2215/22; C10M2215/221; C10M2215/223; C10M2215/224; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/30; C10N; C10N2040/00; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50; F; F04; F04C; F04C2210/00; F04C2210/26
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
54 words
A lubricant composition comprising as a base oil at least one member selected from the group consisting of ester oils, alkylbenzene oils and mineral oils, and an epoxy compound having at least two epoxy groups, said epoxy compound showing good acid catching effect resulting in reduced corrosion of metals and no irritation of skin.
Claim 2
Dependent Claim
54 words
A lubricant composition comprising as a base oil at least one member selected from the group consisting of ester oils, alkylbenzene oils and mineral oils, and an epoxy compound having at least two epoxy groups, said epoxy compound showing good acid catching effect resulting in reduced corrosion of metals and no irritation of skin.
Claim 3
Dependent Claim
28 words
A composition according to claim 1, wherein the epoxy compound is contained in an amount of 0.05 to 10% by weight based on the weight of the composition.
Claim 4
Dependent Claim
45 words
A lubricant composition comprising as a base oil at least one member selected from the group consisting of ester oils, alkylbenzene oils and mineral oils, and an epoxy compound having at least two epoxy groups, the epoxy compound being a compound of the formula: ##STR18##
Claim 5
Dependent Claim
45 words
A lubricant composition comprising as a base oil at least one member selected from the group consisting of ester oils, alkylbenzene oils and mineral oils, and an epoxy compound having at least two epoxy groups, the epoxy compound being a compound of the formula: ##STR18##
Claim 6
Dependent Claim
78 words
A lubricant composition comprising as a base oil at least one member selected from the group consisting of ester oils, alkylbenzene oils and mineral oils, and an epoxy compound having at least two epoxy groups, the epoxy compound being a compound of the formula: ##STR19## wherein R is an alkylene group having 1 to 5 carbon atoms; and R 3 and R 4 are independently a hydrogen atom or an alkyl group having 1 to 5 carbon atoms.
Claim 7
Dependent Claim
78 words
A lubricant composition comprising as a base oil at least one member selected from the group consisting of ester oils, alkylbenzene oils and mineral oils, and an epoxy compound having at least two epoxy groups, the epoxy compound being a compound of the formula: ##STR19## wherein R is an alkylene group having 1 to 5 carbon atoms; and R 3 and R 4 are independently a hydrogen atom or an alkyl group having 1 to 5 carbon atoms.
Claim 8
Dependent Claim
117 words
A process for operating a refrigerant compressor comprising a closed vessel containing a lubricant composition comprising as a base oil at least one member selected from the group consisting of ester oils, alkylbenzene oils and mineral oils, and an epoxy compound having at least two epoxy groups, at the bottom and housing therein a motor comprising a rotor and a stator, a rotating shaft fixed on the rotor, a compressing means connected to the motor via the rotating shaft and at least one refrigerant selected from hydrofluorocarbons and hydrochlorofluorocarbons wherein the refrigerant and the lubricant composition are compressed; said epoxy compound showing good acid catching effect resulting in reduced corrosion of metals and no irritation of skin.
Claim 9
Dependent Claim
117 words
A process for operating a refrigerant compressor comprising a closed vessel containing a lubricant composition comprising as a base oil at least one member selected from the group consisting of ester oils, alkylbenzene oils and mineral oils, and an epoxy compound having at least two epoxy groups, at the bottom and housing therein a motor comprising a rotor and a stator, a rotating shaft fixed on the rotor, a compressing means connected to the motor via the rotating shaft and at least one refrigerant selected from hydrofluorocarbons and hydrochlorofluorocarbons wherein the refrigerant and the lubricant composition are compressed; said epoxy compound showing good acid catching effect resulting in reduced corrosion of metals and no irritation of skin.
Claim 10
Dependent Claim
83 words
A process for operating a refrigeration apparatus comprising a compressor, a condenser, an expansion means, an evaporator and pipes for connecting these devices and cycling a refrigerant containing the lubricant composition comprising as a base oil at least one member selected from the group consisting of ester oils, alkylbenzene oils and mineral oils, and an epoxy compound having at least two epoxy groups therethrough, said epoxy compound showing good acid catching effect resulting in reduced corrosion of metals and no irritation of skin.
Claim 11
Dependent Claim
83 words
A process for operating a refrigeration apparatus comprising a compressor, a condenser, an expansion means, an evaporator and pipes for connecting these devices and cycling a refrigerant containing the lubricant composition comprising as a base oil at least one member selected from the group consisting of ester oils, alkylbenzene oils and mineral oils, and an epoxy compound having at least two epoxy groups therethrough, said epoxy compound showing good acid catching effect resulting in reduced corrosion of metals and no irritation of skin.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1998-05-22 | 1998-11-21 | 1999-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-22 | 2002-11-21 | 2003-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-22 | 2006-11-21 | 2007-05-23 | $7700.00 | Window Closed / Lapsed |