Patent US3879044A successfully refreshed from Google Patents.
US3879044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced elastomeric o-ring with improved compression set
Assignee: EIDP Inc
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Filing: 1973-06-13
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Granted: 1975-04-22
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Expires: 1993-06-13
Abstract
Abstract A composition comprising a fluoroelastomer o-ring containing fibers which serve as a filler, said fibers having an L/D ratio of at least 15 and being oriented so that at least 25% of the fibers are at an angle of 30* or less from radii through the center and in the plane of the o-ring. Thus the fibers are primarily radially oriented. The o-ring has improved compression set.
Inventors
- 👤 Gerald Martin Estes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:53
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/021; F16J15/022; F16J15/024; F16J15/027; Y; Y10; Y10S; Y10S277/00; Y10S277/915; Y10S277/935; Y10S277/944; Y10S277/945; Y10S285/00; Y10S285/917
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
54 words
AN ARTICLE OF MANUFACTURE COMPRISING A FLUOROELASTOMER SEALANT CONTAINING THEREIN NON-WOVEN RADIALLY ORIENTED FIBERS, AT LEAST ABOUT 25% OF SAID FIBERS FORMING AN ANGLE OF NO MORE THAN ABOUT 30* FROM RADDI DRAWN THROUGH THE CENTER AND IN THE PLANE OF SAID SEALANT SAID FIBERS HAVING AN L/D RATIO OF AT LEAST ABOUT 15.
Claim 2
Dependent Claim
54 words
AN ARTICLE OF MANUFACTURE COMPRISING A FLUOROELASTOMER SEALANT CONTAINING THEREIN NON-WOVEN RADIALLY ORIENTED FIBERS, AT LEAST ABOUT 25% OF SAID FIBERS FORMING AN ANGLE OF NO MORE THAN ABOUT 30* FROM RADDI DRAWN THROUGH THE CENTER AND IN THE PLANE OF SAID SEALANT SAID FIBERS HAVING AN L/D RATIO OF AT LEAST ABOUT 15.
Claim 3
Dependent Claim
54 words
An article of manufacture comprising a fluoroelastomer sealant containing therein non-woven radially oriented fibers, at least about 25% of said fibers forming an angle of no more than about 30* from radii drawn through the center and in the plane of said sealant said fibers having an L/D ratio of at least about 15.
Claim 4
Dependent Claim
54 words
An article of manufacture comprising a fluoroelastomer sealant containing therein non-woven radially oriented fibers, at least about 25% of said fibers forming an angle of no more than about 30* from radii drawn through the center and in the plane of said sealant said fibers having an L/D ratio of at least about 15.
Claim 5
Dependent Claim
27 words
The article of manufacture of claim 1 wherein said article is an sealant comprising a copolymer of vinylidene fluoride and at least one fluorinated ethylenically unsaturated comonomer.
Claim 6
Dependent Claim
37 words
The article of manufacture of claim 1 wherein at least about 40% of the fibers form an angle of no more than about 30* with radii drawn through the center and in the plane of the sealant.
Claim 7
Dependent Claim
19 words
The article of manufacture of claim 1 in which the copolymer is a polymer of vinylidene fluoride and hexafluoropropylene.
Claim 8
Dependent Claim
24 words
The article of manufacture of claim 1 in which the fibers are present in the amount of 5-50 parts per hundred parts of rubber.
Claim 9
Dependent Claim
24 words
The article of manufacture of claim 1 in which the fiber is selected from the group consisting of fibrous potassium titanate and acicular rutile.
References Cited (Backward Citations)
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US3049385A
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US2974183A
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US3552755A
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US3580590A
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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) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |