US4175045A
Expired / Lapsed
US
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Compressor lubrication
Assignee: Stauffer Chemical Co
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Filing: 1978-02-27
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Granted: 1979-11-20
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Expires: 1998-02-27
Abstract
Abstract An improved method of lubricating a compressor comprises bringing the components of the compressor which are to be lubricated into contact with a synthetic lubricant composition comprising a polyol ester of a carboxylic acid having from about 4 to about 13 carbon atoms in its structure.
Inventors
- 👤 Peter E. Timony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:04
CPC Classifications
C; C10; C10M; C10M105/00; C10M105/08; C10M105/32; C10M105/38; C10M2207/00; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/109; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/30; C10M2219/00; C10M2219/04; C10M2219/044; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/06; C10M2223/065; C10N; C10N2040/00; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
50 words
A method of lubricating a compressor which comprises bringing the components of said compressor which are to be lubricated into contact with an effective amount of a synthetic lubricant composition comprising a polyol ester of a carboxylic acid having from about 4 to about 13 carbon atoms in its structure.
Claim 2
Independent Claim
50 words
A method of lubricating a compressor which comprises bringing the components of said compressor which are to be lubricated into contact with an effective amount of a synthetic lubricant composition comprising a polyol ester of a carboxylic acid having from about 4 to about 13 carbon atoms in its structure.
Claim 3
Dependent Claim
29 words
The method of lubricating a compressor in accordance with claim 1 wherein said polyol ester is a pentaerythritol ester, a dipentaerythritol ester, a trimethylolpropane ester, or any combination thereof.
Claim 4
Dependent Claim
60 words
The method of lubricating a compressor in accordance with claim 1 wherein said polyol ester is a combination of at least two esters selected from the group consisting of pentaerythritol esters, dipentaerythritol ester, and trimethylolpropane esters; each ester having an acid moiety which can be the same or different from the acid moiety of any other ester in said combination.
Claim 5
Dependent Claim
70 words
The method of lubricating a compressor in accordance with claim 1 wherein said polyol ester is a mixed ester formed by reacting a mixture of at least two polyols selected from the group consisting of pentaerythritol, dipentaerythritol, and trimethylolpropane with a carboxylic acid selected from the group consisting of linear carboxylic acids having from about 4 to about 13 carbon atoms in their structure or a mixture of such acids.
Claim 6
Independent Claim
105 words
A method of lubricating a compressor which comprises bringing the components of said compressor which are to be lubricated into contact with an effective amount of a synthetic lubricant composition comprising a major amount of a pentaerythritol ester composition, said pentaerythritol ester composition comprising: (1) from about 50 to about 95% by weight of a pentaerythritol ester of a mixture of linear carboxylic acids, each having from about 4 to about 13 carbon atoms; and (2) from about 5 to about 50% by weight of a dipentaerythritol ester of a mixture of linear carboxylic acids, each having from about 4 to about 13 carbon atoms.
Claim 7
Independent Claim
105 words
A method of lubricating a compressor which comprises bringing the components of said compressor which are to be lubricated into contact with an effective amount of a synthetic lubricant composition comprising a major amount of a pentaerythritol ester composition, said pentaerythritol ester composition comprising: (1) from about 50 to about 95% by weight of a pentaerythritol ester of a mixture of linear carboxylic acids, each having from about 4 to about 13 carbon atoms; and (2) from about 5 to about 50% by weight of a dipentaerythritol ester of a mixture of linear carboxylic acids, each having from about 4 to about 13 carbon atoms.
Claim 8
Dependent Claim
74 words
The method in accordance with claim 5 wherein said mixture of linear carboxylic acids comprises from about 1 to about 2 molar parts of a linear 5-carbon carboxylic acid, from about 1 to about 2 molar parts of linear 6-carbon carboxylic acid, and from about 0.5 to about 1.5 molar part of a linear carboxylic acid having from 8 to 10 carbon atoms or any combination of linear 8-carbon to 10 carbon carboxylic acids.
Claim 9
Dependent Claim
39 words
The method in accordance with claim 6 wherein said pentaerythritol ester composition is comprised of from about 80 to 90% by weight of said pentaerythritol ester and from about 10 to about 20% by weight of said dipentaerythritol ester.
Claim 10
Dependent Claim
14 words
The method in accordance with claim 7 wherein said compressor is a rotary compressor.
Claim 11
Dependent Claim
16 words
The method in accordance with claim 8 wherein said rotary compressor is a rotary screw compressor.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-11-19 | 1983-05-21 | 1983-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-19 | 1987-05-21 | 1987-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-19 | 1991-05-21 | 1991-11-20 | $7700.00 | Window Closed / Lapsed |