US3893674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-frictional closure for exclusion of contaminants
Assignee: United States Steel Corp
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Filing: 1973-12-26
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Granted: 1975-07-08
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Expires: 1993-12-26
Abstract
Abstract Closures are presently employed to prevent external contaminants such as dust and liquids from entering bearing housings at the region of clearance between the shaft and the housing. One such closure relies on the use of mated, washer-like surfaces wherein such surfaces are perpendicular to the axis of the shaft. Exclusion of contaminants is enhanced, by inclining the surfaces toward the direction of ingress of the contaminating substances, at an angle of about 10-40*.
Inventors
- 👤 Terry E Paradine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:42
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/44; F16J15/447; F16J15/4472; F16J15/4474; F16C; F16C13/00; F16C13/02; F16C33/00; F16C33/72; F16C33/76; F16C33/80
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
163 words
In an apparatus which includes a rotating, generally cylindrical shaft; a housing circumscribing a journaled portion of said shaft, said housing having a clearance between it and the shaft; a closure for sealing said clearance against the entry of contaminating substances, said closure comprising (i) a shaftconnected member having a bore, the surface of which is in tight engagement With an outwardly displaced circumferential portion of said shaft, said shaft-connected member having a flange portion with a washer-like face, and (ii) encircling said shaft, a housing-connected member having a flange portion with a washerlike face for non-frictionally mating with the washer-like face of said shaft-connected member, whereby said housing-connected and shaft-connected members form a substantially enclosed chamber sealed against the entry therein of said contaminating substances, the improvement wherein said mated washer-like faces are inclined toward the direction of ingress of said contaminating substances, at an angle of from about 10*-40* with respect to a plane orthoganol to the axis of said shaft.
Claim 2
Dependent Claim
163 words
In an apparatus which includes a rotating, generally cylindrical shaft; a housing circumscribing a journaled portion of said shaft, said housing having a clearance between it and the shaft; a closure for sealing said clearance against the entry of contaminating substances, said closure comprising (i) a shaftconnected member having a bore, the surface of which is in tight engagement With an outwardly displaced circumferential portion of said shaft, said shaft-connected member having a flange portion with a washer-like face, and (ii) encircling said shaft, a housing-connected member having a flange portion with a washerlike face for non-frictionally mating with the washer-like face of said shaft-connected member, whereby said housing-connected and shaft-connected members form a substantially enclosed chamber sealed against the entry therein of said contaminating substances, the improvement wherein said mated washer-like faces are inclined toward the direction of ingress of said contaminating substances, at an angle of from about 10*-40* with respect to a plane orthoganol to the axis of said shaft.
Claim 3
Dependent Claim
19 words
The apparatus of claim 1, wherein the angle of inclination of said mated faces is greater than about 15*.
Claim 4
Dependent Claim
24 words
The apparatus of claim 2, wherein the normal distance between said mated washer-like faces is within the range of from 0.0001 to 0.05 inches.
Claim 5
Dependent Claim
29 words
The apparatus of claim 3, wherein said washer-like surface of the shaft-connected member is outwardly facing and the corresponding mated washer-like surface of the housing-connected member is inwardly facing.
References Cited (Backward Citations)
US2003605A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |