US4194748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radial shaft sealing ring
Assignee: Carl Freudenberg KG
•
Filing: 1978-03-09
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Granted: 1980-03-25
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Expires: 1998-03-09
Abstract
Abstract In a sealed radial shaft assembly comprising a radial shaft and an annular sealing ring, the inside of said ring encircling said shaft, said sealing ring having fiber ends projecting therefrom and contacting said shaft so as to enhance said seal, the improvement which comprises an integrally molded casing about the outside of said ring. The casing may be molded of thermoplastic or thermosetting materials, e.g. polypropylene, polyurethane, or the like, and a stiffening reinforcement such as a metal ring may be embedded in the casing. If the ring portion is of fabric, the plastic fills the pores to form a unit therewith.
Inventors
- 👤 Hans Forch
- 👤 Helmut Niklas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:45
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3284; F16J15/3244; F16J15/3288; Y; Y10; Y10S; Y10S277/00; Y10S277/935; Y10S277/944
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
103 words
In a sealed radial shaft assembly comprising a radial shaft and a flat flexible annular sealing ring, the inner portion of said ring encircling said shaft, said sealing ring having fiber ends projecting therefrom and contacting said shaft so as to enhance said seal, the improvement which comprises an integral casing molded on the outside of said ring with the outer portion of the ring embedded in the casing to maintain the inner portion of the ring in contact with the shaft in an axially deflected position whereby the flexibility of the ring permits flexible sealing of the shaft independent of mounting tolerances.
Claim 2
Dependent Claim
103 words
In a sealed radial shaft assembly comprising a radial shaft and a flat flexible annular sealing ring, the inner portion of said ring encircling said shaft, said sealing ring having fiber ends projecting therefrom and contacting said shaft so as to enhance said seal, the improvement which comprises an integral casing molded on the outside of said ring with the outer portion of the ring embedded in the casing to maintain the inner portion of the ring in contact with the shaft in an axially deflected position whereby the flexibility of the ring permits flexible sealing of the shaft independent of mounting tolerances.
Claim 3
Dependent Claim
11 words
An assembly according to claim 1, wherein said casing comprises plastic.
Claim 4
Dependent Claim
11 words
An assembly according to claim 1, wherein said casing comprises polypropylene.
Claim 5
Dependent Claim
11 words
An assembly according to claim 1, wherein said casing comprises polyurethane.
Claim 6
Dependent Claim
14 words
An assembly according to claim 1, wherein said casing includes a reinforcement embedded therein.
Claim 7
Dependent Claim
13 words
An assembly according to claim 5, wherein said reinforcement comprises a metal ring.
Claim 8
Dependent Claim
21 words
An assembly according to claim 6, wherein said ring comprises a fabric, the material of said casing extending into said fabric.
Claim 9
Dependent Claim
29 words
An assembly according to claim 1, wherein the sealing ring comprises one of a woven and nonwoven fabric and the casing is injection molded thereon filling the pores thereof.
Claim 10
Dependent Claim
81 words
A sealing ring for a radial shaft comprising a disk-like flat flexible annulus having fibers projecting from at least one face thereof and an integral peripheral casing molded directly on the outer periphery of said annulus with a portion of the outer periphery embeddded in the casing to maintain the inner portion of the annulus in contact with the shaft in an axially deflected position whereby the flexibility of the ring permits flexible sealing of the shaft independent of mounting tolerances.
Claim 11
Dependent Claim
81 words
A sealing ring for a radial shaft comprising a disk-like flat flexible annulus having fibers projecting from at least one face thereof and an integral peripheral casing molded directly on the outer periphery of said annulus with a portion of the outer periphery embeddded in the casing to maintain the inner portion of the annulus in contact with the shaft in an axially deflected position whereby the flexibility of the ring permits flexible sealing of the shaft independent of mounting tolerances.
Claim 12
Dependent Claim
11 words
A ring according to claim 9, wherein said casing comprises plastic.
Claim 13
Dependent Claim
11 words
A ring according to claim 9, wherein said casing comprises polypropylene.
Claim 14
Dependent Claim
11 words
A ring according to claim 9, wherein said casing comprises polyurethane.
Claim 15
Dependent Claim
14 words
A ring according to claim 9, wherein said casing includes a reinforcement embedded therein.
Claim 16
Dependent Claim
13 words
A ring according to claim 13, wherein said reinforcement comprises a metal ring.
Claim 17
Dependent Claim
21 words
A ring according to claim 13, wherein said ring comprises a fabric, the material of said casing extending into said fabric.
Claim 18
Dependent Claim
28 words
A ring according to claim 9, wherein the annulus comprises one of a woven and nonwoven fabric and the casing is injection molded thereon filling the pores thereof.
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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) | 1983-03-25 | 1983-09-24 | 1984-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-25 | 1987-09-24 | 1988-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-25 | 1991-09-24 | 1992-03-25 | $7700.00 | Window Closed / Lapsed |