US3765688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High speed shaft centrifuge fluid seal
Assignee: Avco Corp
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Filing: 1971-07-19
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Granted: 1973-10-16
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Expires: 1991-07-19
Abstract
Abstract A U-shaped annular housing having a plurality of impeller vanes is fixed to a rotating shaft. A fixed radial baffle extends into the housing between the vanes and sealing is accomplished by centrifuging a fluid between the impellers and the baffle. Cool sealing fluid is continuously admitted to the housing in a radial jet stream and is exhausted by means of a plurality of bleed holes.
Inventors
- 👤 A Junker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:01
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/40; F16J15/42
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
152 words
A shaft seal comprising: a rotatable shaft; a U-shaped channel member having first and second axially spaced side walls and a base, said first wall being affixed to said shaft for rotation therewith and having an arcuate rim, the opening to said channel member being directed radially inwardly; stationary support structure; an annular baffle in the form of a disc affixed to said stationary support structure and radially projecting into said channel member through said opening, said disc having a lip overlapping and extending toward said rim whereby sealing fluid dripping from said baffle is deflected by said lip onto said rim and is centrifuged by said rim into said channel member; means for continuously supplying sealing fluid to said channel member during rotation of said shaft; and at least one bleed port formed in the base of said channel member for continuously bleeding sealing fluid radially outward from said channel member.
Claim 2
Dependent Claim
152 words
A shaft seal comprising: a rotatable shaft; a U-shaped channel member having first and second axially spaced side walls and a base, said first wall being affixed to said shaft for rotation therewith and having an arcuate rim, the opening to said channel member being directed radially inwardly; stationary support structure; an annular baffle in the form of a disc affixed to said stationary support structure and radially projecting into said channel member through said opening, said disc having a lip overlapping and extending toward said rim whereby sealing fluid dripping from said baffle is deflected by said lip onto said rim and is centrifuged by said rim into said channel member; means for continuously supplying sealing fluid to said channel member during rotation of said shaft; and at least one bleed port formed in the base of said channel member for continuously bleeding sealing fluid radially outward from said channel member.
Claim 3
Dependent Claim
16 words
The invention as defined in claim 1 further comprising radial impellers secured to said side walls.
Claim 4
Dependent Claim
21 words
The invention as defined in claim 1 wherein said fluid is supplied to said channel member in a radially directed jet.
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |