Patent US5445753A successfully refreshed from Google Patents.
US5445753A
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Lubricant for refrigeration compressors
Assignee: Hitachi Ltd
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Filing: 1993-03-17
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Granted: 1995-08-29
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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 19:15
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: 16
Claim 1
Independent Claim
125 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 being at least one member selected from the group consisting of an alkylene glycol diglycidyl ether and an alicyclic epoxy compound; the alkylene glycol diglycidyl ether being at least one member selected from the group consisting of compounds of the formula: ##STR18## wherein R 1 is an alkylene group; R 2 is a hydrogen atom or an alkyl group; and n is an integer of 1 to 22, a compound of the formula: ##STR19## a compound of the formula: ##STR20## and a compound of the formula: ##STR21##
Claim 2
Dependent Claim
125 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 being at least one member selected from the group consisting of an alkylene glycol diglycidyl ether and an alicyclic epoxy compound; the alkylene glycol diglycidyl ether being at least one member selected from the group consisting of compounds of the formula: ##STR18## wherein R 1 is an alkylene group; R 2 is a hydrogen atom or an alkyl group; and n is an integer of 1 to 22, a compound of the formula: ##STR19## a compound of the formula: ##STR20## and a compound of the formula: ##STR21##
Claim 3
Dependent Claim
54 words
A lubricant composition according to claim 1, wherein the compound of the formula (1) is at least one member selected from the group consisting of compounds of the formula: ##STR22## wherein n is an integer of 1 to 22, and compounds of the formula: ##STR23## wherein n is an integer of 1 to 20.
Claim 4
Dependent Claim
70 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 being at least one member selected from the group consisting of an alkylene glycol diglycidyl ether and an alicyclic epoxy compound; the alicyclic epoxy compound being a compound of the formula: ##STR24##
Claim 5
Dependent Claim
70 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 being at least one member selected from the group consisting of an alkylene glycol diglycidyl ether and an alicyclic epoxy compound; the alicyclic epoxy compound being a compound of the formula: ##STR24##
Claim 6
Dependent Claim
70 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 being at least one member selected from the group consisting of an alkylene glycol diglycidyl ether and an alicyclic epoxy compound; the alicyclic epoxy compound being a compound of the formula: ##STR25##
Claim 7
Dependent Claim
70 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 being at least one member selected from the group consisting of an alkylene glycol diglycidyl ether and an alicyclic epoxy compound; the alicyclic epoxy compound being a compound of the formula: ##STR25##
Claim 8
Dependent Claim
70 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 being at least one member selected from the group consisting of an alkylene glycol diglycidyl ether and an alicyclic epoxy compound; the alicyclic epoxy compound being a compound of the formula: ##STR26##
Claim 9
Dependent Claim
70 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 being at least one member selected from the group consisting of an alkylene glycol diglycidyl ether and an alicyclic epoxy compound; the alicyclic epoxy compound being a compound of the formula: ##STR26##
Claim 10
Dependent Claim
156 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 being at least one member selected from the group consisting of an alkylene glycol diglycidyl ether and an alicyclic epoxy compound; said alkylene glycol diglycidyl ether being at least one member selected from the group consisting of compounds of the formula: ##STR27## wherein R 1 is an alkylene group; R 2 is a hydrogen atom or an alkyl group; and n is an integer of 1 to 22, a compound of the formula: ##STR28## a compound of the formula: ##STR29## and a compound of the formula: ##STR30## and the alicyclic epoxy compound being selected from the group consisting of: a compound of the formula: ##STR31## a compound of the formula: ##STR32## and a compound of the formula: ##STR33##
Claim 11
Dependent Claim
156 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 being at least one member selected from the group consisting of an alkylene glycol diglycidyl ether and an alicyclic epoxy compound; said alkylene glycol diglycidyl ether being at least one member selected from the group consisting of compounds of the formula: ##STR27## wherein R 1 is an alkylene group; R 2 is a hydrogen atom or an alkyl group; and n is an integer of 1 to 22, a compound of the formula: ##STR28## a compound of the formula: ##STR29## and a compound of the formula: ##STR30## and the alicyclic epoxy compound being selected from the group consisting of: a compound of the formula: ##STR31## a compound of the formula: ##STR32## and a compound of the formula: ##STR33##
Claim 12
Dependent Claim
29 words
A lubricant composition according to claim 6, wherein the epoxy compound is contained in an amount of 0.05 to 10% by weight based on the weight of the composition.
Claim 13
Dependent Claim
20 words
A lubricant composition according to claim 1, 3, 2, 4, 5, 6 or 7, which further comprises a phenolic antioxidant.
Claim 14
Dependent Claim
45 words
A lubricant composition according to claim 8, wherein the epoxy compound is contained in an amount of 0.05 to 10% by weight, and the phenolic antioxidant is contained in an amount of 0.01 to 5% by weight, each based on the weight of the composition.
Claim 15
Dependent Claim
51 words
A lubricant composition according to claim 8, wherein the phenolic antioxidant is at least one member selected from the group consisting of compounds of the formula: ##STR34## wherein x is an integer of 1 to 3, and compounds of the formula: ##STR35## wherein x is an integer of 1 to 3.
Claim 16
Dependent Claim
34 words
A lubricant composition according to claim 1, 3, 2, 4 or 5, wherein the epoxy compound is contained in an amount of 0.05 to 10% by weight based on the weight of the composition.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-08-28 | 1999-02-27 | 1999-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-08-28 | 2003-02-27 | 2003-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-08-28 | 2007-02-27 | 2007-08-29 | $7700.00 | Window Closed / Lapsed |