Patent US4304409A successfully refreshed from Google Patents.
US4304409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing assembly
Assignee: Inpro Inc
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Filing: 1979-06-11
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Granted: 1981-12-08
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Expires: 1999-06-11
Abstract
Abstract An improved sealing assembly arranged to be used with a bearing shaft and housing. The sealing assembly is positioned in between the shaft and housing and includes a multi-ring structure journaled to the housing and arranged in between the shaft and housing. The improvement comprises a pressure and self-compensating radial-contact sealing device mounted within an enclosure of the multi-ring sealing structure and positioned radially to the bearing shaft. The radial-contact sealing device consists of a cover and a support spring partially capsulated by the cover.
Inventors
- 👤 David C. Orlowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:44
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3436; F16J15/3456; F16J15/32; F16J15/3204; F16J15/3232; F16J15/44; F16J15/447; F16J15/4472; F16J15/4474
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
122 words
A liquid pressure differential sealing assembly arranged to be used with a bearing shaft and housing and positioned in between said shaft and housing, said assembly comprising: (a) a multi-ring sealing structure with a first ring have annular axially extending recesses at opposite ends and second and third rings positioned at said opposite ends of said first ring and each having an annular extending flange that fits, respectively, within said opposing recesses; and (b) a pressure and self-compensating sealing device mounted within an enclosure of said multi-ring structure and positioned around said shaft, said pressure and self-compensating sealing device consisting of an U-shaped low friction ring having its U-shaped opening extending axially and a support ring partially encapsulated in said U-shaped ring.
Claim 2
Dependent Claim
122 words
A liquid pressure differential sealing assembly arranged to be used with a bearing shaft and housing and positioned in between said shaft and housing, said assembly comprising: (a) a multi-ring sealing structure with a first ring have annular axially extending recesses at opposite ends and second and third rings positioned at said opposite ends of said first ring and each having an annular extending flange that fits, respectively, within said opposing recesses; and (b) a pressure and self-compensating sealing device mounted within an enclosure of said multi-ring structure and positioned around said shaft, said pressure and self-compensating sealing device consisting of an U-shaped low friction ring having its U-shaped opening extending axially and a support ring partially encapsulated in said U-shaped ring.
Claim 3
Dependent Claim
28 words
A sealing device according to claim 1, wherein said sealing device is mounted within an enclosure formed by said first ring with either said second or third ring.
Claim 4
Dependent Claim
76 words
A sealing assembly according to claim 1, wherein said sealing device U-shaped low friction ring having its U-shaped opening extending axially is adapted to be pressed against members of said multi-ring structure to press said members into sealing contact and against the sealing surface of said shaft, whereby the leakage of the fluid from the bearings and housing outwardly and the leakage of foreign particles from the housing into the bearings and contacting interface are prevented.
Claim 5
Dependent Claim
25 words
A sealing assembly according to claim 1, wherein said U-Shaped low friction ring having its U-shaped opening extending axially is a chemically inert, low-friction material.
Claim 6
Dependent Claim
32 words
A sealing assembly according to claim 4, wherein said U-shaped low friction ring having its U-shaped opening extending axially is a Teflon compound and thermally and chemically resistant to wear and failure.
Claim 7
Dependent Claim
34 words
A sealing assembly according to claim 5, wherein said U-shaped low friction ring having its U-shaped opening extending axially is resistant to failure at temperatures ranging from about -425° F. to about 500° F.
Claim 8
Dependent Claim
18 words
A sealing assembly according to claim 1, wherein said support spring is a helically wound, flexible flat wire.
Claim 9
Dependent Claim
21 words
A sealing assembly according to claim 7, wherein said wire is resilient and provides a permanent resiliency for said sealing device.
Claim 10
Dependent Claim
61 words
A sealing assembly according to claim 1, wherein said sealing assembly is used in a low or negative pressure application, said support spring forces the U-shaped low friction ring having its U-Shaped opening extending axially against the members of said multi-ring structure to press said members into minimum pressure sealing contact and radially to said shaft to provide an effective seal.
Claim 11
Dependent Claim
64 words
A sealing assembly according to claim 1, wherein said sealing assembly is used in a high pressure application, the pressure in the shaft and housing system forces the U-shaped low friction ring having its U-shaped opening extending axially, against the members of said multi-ring structure to press said members into proportional pressure sealing contact and radially to said shaft to provide an effective seal.
Claim 12
Dependent Claim
39 words
A sealing assembly according to claim 1, said sealing assembly normally being vulnerable to abrasive particle wear at the radially contacting interface. The improvement comprising higher specific gravity abrasive particles centrifugally eliminated prior to introduction at the rotating interface.
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) | 1984-12-07 | 1985-06-08 | 1985-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-07 | 1989-06-08 | 1989-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-07 | 1993-06-08 | 1993-12-08 | $7700.00 | Window Closed / Lapsed |