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US4267064A
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Refrigeration lubricating oil compositions
Assignee: Eneos Corp
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Filing: 1979-10-24
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Granted: 1981-05-12
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Expires: 1999-10-24
Abstract
Abstract Oil compositions are disclosed for effective use in the lubrication of rotary-type compressor for refrigeration equipment. The composition essentially comprises a polyglycol oil blended with specified amounts of at least one of additives or compounds of the group consisting of glycidyl ether type epoxy compounds, epoxidized fatty acid monoesters and epoxidized vegetable oils.
Inventors
- 👤 Umekichi Sasaki
- 👤 Masaaki Tsunemi
- 👤 Kaichi Yamada
- 👤 Yoshiyuki Morikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:37
CPC Classifications
C; C10; C10M; C10M169/00; C10M169/04; C10M107/00; C10M107/20; C10M107/30; C10M107/32; C10M107/34; C10M129/00; C10M129/02; C10M129/16; C10M129/18; C10M129/66; C10M171/00; C10M171/008; C10M2207/00; C10M2207/04; C10M2207/042; C10M2207/10; C10M2207/24; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/40; C10M2207/404; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/1033; C10M2209/104; C10M2209/1045; C10M2209/105; C10M2209/1055; C10M2209/106; C10M2209/1065; C10M2209/107; C10M2209/1075; C10M2209/108; C10M2209/1085; C10M2209/109; C10M2209/1095; C10N; C10N2020/00; C10N2020/01; 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: 6
Claim 1
Independent Claim
133 words
A refrigeration lubricating oil composition which comprises: a starting polyglycol oil (A) having a kinetic viscosity in the range of 25-50 cSt at 98.9° C. and a viscosity index of greater than 150, the polyglycol oil being represented by the formula ##STR2## wherein R 1 and R 3 each are a hydrogen atom, hydrocarbon radical or acyl group and may be identical with, or different from, each other; R 2 is an alkylene group; n is an integer of 1-6; and m×n is 2 or greater; and an additive (B) selected from the group consisting of glycidyl ether type epoxy compounds (1), epoxidized fatty acid monoesters (2) and epoxidized vegetable oils (3), the additive (B) being in the range of 0.1-10 percent by weight of the total weight of components (A) and (B).
Claim 2
Dependent Claim
133 words
A refrigeration lubricating oil composition which comprises: a starting polyglycol oil (A) having a kinetic viscosity in the range of 25-50 cSt at 98.9° C. and a viscosity index of greater than 150, the polyglycol oil being represented by the formula ##STR2## wherein R 1 and R 3 each are a hydrogen atom, hydrocarbon radical or acyl group and may be identical with, or different from, each other; R 2 is an alkylene group; n is an integer of 1-6; and m×n is 2 or greater; and an additive (B) selected from the group consisting of glycidyl ether type epoxy compounds (1), epoxidized fatty acid monoesters (2) and epoxidized vegetable oils (3), the additive (B) being in the range of 0.1-10 percent by weight of the total weight of components (A) and (B).
Claim 3
Dependent Claim
38 words
A refrigeration lubricating oil composition according to claim 1, wherein said component (A) is a polyglycol oil selected from the group consisting of polyoxypropylene glycols, polyoxyethylene-polyoxypropylene glycols and their monomethyl ether, monobutyl ether, glycerol ether and trimethylolpropane ether.
Claim 4
Dependent Claim
22 words
A refrigeration lubricating oil composition according to claim 1, wherein said component (A) has an average molecular weight of more than 250.
Claim 5
Dependent Claim
34 words
A refrigeration lubricating oil composition according to claim 1, wherein component (B) is a compound selected from the group consisting of glycidyl ether type epoxy compounds, epoxidized fatty acid monoesters and epoxidized vegetable oils.
Claim 6
Dependent Claim
18 words
A refrigeration lubricating oil composition according to claim 3, said average molecular weight being from 300 to 5000.
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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) | 1984-05-11 | 1984-11-10 | 1985-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-11 | 1988-11-10 | 1989-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-11 | 1992-11-10 | 1993-05-12 | $7700.00 | Window Closed / Lapsed |