Patent US3762727A successfully refreshed from Google Patents.
US3762727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil seal
Assignee: Individual
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Filing: 1971-03-15
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Granted: 1973-10-02
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Expires: 1991-03-15
Abstract
Abstract An oil seal of the type wherein the principal seal is made between the face of a first casing member attached to a rotary shaft or disposed in a machine housing and a flexible washer of a lubricous, high temperature resistant polymer held in place within a second casing and urged axially into engagement with the face of the first casing. The seal assembly is a so-called unitized seal, that is, both the relatively fixed and relatively movable casings are preassembled so that the two-piece unit may be fitted as a whole to a shaft and a machine bore while the unit remains assembled. In one embodiment, the flexible, polymeric sealing washer or ring is urged into engagement with the radial face of the casing by an inclined coil spring. In use, the seal is characterized by low wear, by a hydrodynamic sealing action, by relatively great tolerance to radial runout, and by easy and accurate installation which inherently supplies a desired axial preload to the primary seal components.
Inventors
- 👤 J Jackowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:49
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3436; F16J15/3456
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
282 words
An end face oil seal assembly for maintaining a fluid-tight seal between two relatively movable parts comprising, in combination, inner and outer casing elements, a sealing element comprised of a fluorocarbon material, and spring means for urging said sealing element in a generally axial direction, one of said casing elements having a generally circumferentially extending flange portion with a given axial extent, and the other of said casing elements also having a generally circumferential flange portion with a given axial extent, each of said casings also having generally radially extending flanges which are axially spaced apart and disposed with the inner surfaces thereof in at least partially axially facing relation to each other, one of said axial flanges having a face adapted to be received in snug sealing engagement with a portion of a machine housing and the other of said axial flanges having a face adapted to be received by a portion of a relatively rotatable shaft, said sealing element being a single element, being disposed within the space defined between said inner sur-faces of said radial flanges, and having one marginal portion thereof locked against relative motion with respect to said outer casing element, and a second marginal portion of said sealing element being adapted to engage said inner surface of said radial flange of said other casing to form a primary end face seal therewith, saidd sPring means being disposed within said defined space and urging said second margin of said sealing element axially into engagement with said inner surface of said radial flange, said assembly further including means on one of said casings for engaging a portion of the other of said casings to prevent axial separation thereof.
Claim 2
Dependent Claim
282 words
An end face oil seal assembly for maintaining a fluid-tight seal between two relatively movable parts comprising, in combination, inner and outer casing elements, a sealing element comprised of a fluorocarbon material, and spring means for urging said sealing element in a generally axial direction, one of said casing elements having a generally circumferentially extending flange portion with a given axial extent, and the other of said casing elements also having a generally circumferential flange portion with a given axial extent, each of said casings also having generally radially extending flanges which are axially spaced apart and disposed with the inner surfaces thereof in at least partially axially facing relation to each other, one of said axial flanges having a face adapted to be received in snug sealing engagement with a portion of a machine housing and the other of said axial flanges having a face adapted to be received by a portion of a relatively rotatable shaft, said sealing element being a single element, being disposed within the space defined between said inner sur-faces of said radial flanges, and having one marginal portion thereof locked against relative motion with respect to said outer casing element, and a second marginal portion of said sealing element being adapted to engage said inner surface of said radial flange of said other casing to form a primary end face seal therewith, saidd sPring means being disposed within said defined space and urging said second margin of said sealing element axially into engagement with said inner surface of said radial flange, said assembly further including means on one of said casings for engaging a portion of the other of said casings to prevent axial separation thereof.
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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |