US4278261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing device
Assignee: Nok Corp
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Filing: 1979-06-21
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Granted: 1981-07-14
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Expires: 1999-06-21
Abstract
Abstract The present invention relates to a sealing device comprising a sealing member and a cap, said sealing member consisting of a reinforcement ring with an axial portion and radial portion, a rubber lip portion secured to the end of the radial portion, and a lip-like annular sealing piece secured to the side of the radial portion, said cap consisting of a cylinder portion and a flange portion extending inwardly in the radial direction from the cylinder portion, whereby the axial portion of said reinforcement ring engages with the inside of the cylinder portion of the cap and the annular sealing piece bears tightly against the inner surface of the flange of the cap.
Inventors
- 👤 Takeshi Miura
- 👤 Yasuo Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:55
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3268; F16J15/3276
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
187 words
In a sealing device for a rotating shaft having a reinforcement ring with an axial portion and a radial portion, an annular lip element made of rubber secured to the inner end of said radial portion and adapted for sealing engagement on its inner surface with the shaft, a cap having a cylindrical portion and a radial flange being positioned in use so that the inner surface of said cylindrical portion engages the outer surface of said axial portion of said ring and an annular space is provided between said flange and said radial portion of said reinforcement ring, and a lip-like annular rubber seal extending radially from said lip element in said annular space, the improvement comprising an annular groove in the radially outermost surface of said lip-like annular seal and a stepped portion in the surface of said lip-like annular seal adjacent the inner surface of said flange forming a reduced thickness toward the radially inner portion of said seal, said radially outer portion of said seal being tightly compressed between said radial flange of said cap and said radial portion of said reinforcement ring.
Claim 2
Dependent Claim
187 words
In a sealing device for a rotating shaft having a reinforcement ring with an axial portion and a radial portion, an annular lip element made of rubber secured to the inner end of said radial portion and adapted for sealing engagement on its inner surface with the shaft, a cap having a cylindrical portion and a radial flange being positioned in use so that the inner surface of said cylindrical portion engages the outer surface of said axial portion of said ring and an annular space is provided between said flange and said radial portion of said reinforcement ring, and a lip-like annular rubber seal extending radially from said lip element in said annular space, the improvement comprising an annular groove in the radially outermost surface of said lip-like annular seal and a stepped portion in the surface of said lip-like annular seal adjacent the inner surface of said flange forming a reduced thickness toward the radially inner portion of said seal, said radially outer portion of said seal being tightly compressed between said radial flange of said cap and said radial portion of said reinforcement ring.
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) | 1984-07-13 | 1985-01-12 | 1985-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-13 | 1989-01-12 | 1989-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-13 | 1993-01-12 | 1993-07-14 | $7700.00 | Window Closed / Lapsed |