US4045362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deflated tire lubricant
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1976-03-12
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Granted: 1977-08-30
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Expires: 1996-03-12
Abstract
Abstract To facilitate relative movement between the internal surface of a pneumatic tire which comes in contact when the tire is run in a deflated condition, the interior of the tire is coated with a lubricant. An example of the lubricant is as follows: Lubricant A. ethylene glycol base B. water C. polyethylene oxide D. polysaccharide E. cellulose fibers.
Inventors
- 👤 Tiong H. Kuan
- 👤 John G. Sommer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:50
CPC Classifications
B; B60; B60C; B60C17/00; B60C17/10; B60C17/103
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
133 words
A stable lubricant for a pneumatic tire for use when the tire is operated in an uninflated or deflated condition, said lubricant comprising: a. 100 parts of a water/ethylene-glycol mixture wherein there is at least one part of water for every 4 parts of ethylene glycol; b. from about 0.05 to about 2 parts by weight of a polyethylene oxide of a molecular weight of about 500,000; c. from about 0.15 to about 2 parts by weight of a polysaccharide having a molecular weight of at least about 10,000; and d. up to 8 parts by weight of cellulose fibers, said fibers having a length not more than 400 microns; a lubricant of a viscosity such that the fibers will remain dispersed when the tire is subjected to 200 g's at 70° C.
Claim 2
Dependent Claim
133 words
A stable lubricant for a pneumatic tire for use when the tire is operated in an uninflated or deflated condition, said lubricant comprising: a. 100 parts of a water/ethylene-glycol mixture wherein there is at least one part of water for every 4 parts of ethylene glycol; b. from about 0.05 to about 2 parts by weight of a polyethylene oxide of a molecular weight of about 500,000; c. from about 0.15 to about 2 parts by weight of a polysaccharide having a molecular weight of at least about 10,000; and d. up to 8 parts by weight of cellulose fibers, said fibers having a length not more than 400 microns; a lubricant of a viscosity such that the fibers will remain dispersed when the tire is subjected to 200 g's at 70° C.
Claim 3
Dependent Claim
29 words
The lubricant of claim 1 wherein the polysaccharide and the polyethylene oxide are dissolved in an aqueous solution which is compatible with the adjacent rubber portions of the tire.
Claim 4
Dependent Claim
42 words
The lubricant of claim 1 wherein the viscosity at 25° C. is no more than 10 percent greater than the viscosity at 85° C. and is capable of maintaining proper dispersion of the filler when subjected to 200 g's at 70° C.
References Cited (Backward Citations)
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Cited
US1918187A
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GB1017951A
Cited
US3350307A
Cited
US3699057A
Cited
US3826743A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-29 | 1981-02-28 | 1981-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-29 | 1985-02-28 | 1985-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-29 | 1989-02-28 | 1989-08-30 | $7700.00 | Window Closed / Lapsed |