Patent US4029323A successfully refreshed from Google Patents.
US4029323A
Expired / Lapsed
US
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Fluid pressure seal arrangement
Assignee: NSK Ltd
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Filing: 1976-02-13
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Granted: 1977-06-14
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Expires: 1996-02-13
Abstract
Abstract In a body supporting another body via a land into which sealing gas is supplied via an in-coming gas groove or grooves for liquid sealing purpose and from which fluid is discharged through a fluid groove, one or more sets of out-going gas grooves are formed opening to the land in between the in-coming gas groove(s) and the fluid groove so that both undesirable mixing of the sealing gas with the fluid and accidental invasion of outside dust or the like into the arrangement is effectively prevented.
Inventors
- 👤 Gentei Inoue
- 👤 Chuichi Sato
- 👤 Mamoru Tanaka
- 👤 Nobuhiro Matsuo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 02:04
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/40; F16J15/406; F16C; F16C32/00; F16C32/06; F16C32/0629; F16C32/064; F16C32/0651; F16C33/00; F16C33/72; F16C33/74; F16C33/741; F16C33/748
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
A static pressure seal arrangement for containing liquid between a planar base seat surface and a body overlying but spaced from said surface, said base seat including a liquid intake passage and a liquid outflow passage nearer the periphery of the base seat than said intake passage and connecting with a continuous liquid outlet groove recessed in said base seat surface and totally enclosing an interior area thereof, comprising, at least a continuous inlet sealing gas groove recessed in said base seat surface and totally enclosing an interior area thereof, at least a continuous sealing gas outlet groove recessed in said base seat surface, said at least an outlet groove being located interiorally of at least one inlet groove, said at least an outlet groove also totally enclosing an interior area of said surface, said gas inlet and outlet grooves being located exteriorally of said liquid outlet groove, a supply passage in said base seat extending perpendicular and connecting with each gas inlet groove, and an output passage in said base seat extending perpendicular and connecting with each gas outlet groove.
Claim 2
Dependent Claim
181 words
A static pressure seal arrangement for containing liquid between a planar base seat surface and a body overlying but spaced from said surface, said base seat including a liquid intake passage and a liquid outflow passage nearer the periphery of the base seat than said intake passage and connecting with a continuous liquid outlet groove recessed in said base seat surface and totally enclosing an interior area thereof, comprising, at least a continuous inlet sealing gas groove recessed in said base seat surface and totally enclosing an interior area thereof, at least a continuous sealing gas outlet groove recessed in said base seat surface, said at least an outlet groove being located interiorally of at least one inlet groove, said at least an outlet groove also totally enclosing an interior area of said surface, said gas inlet and outlet grooves being located exteriorally of said liquid outlet groove, a supply passage in said base seat extending perpendicular and connecting with each gas inlet groove, and an output passage in said base seat extending perpendicular and connecting with each gas outlet groove.
References Cited (Backward Citations)
US3414274A
Cited
US3880434A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-13 | 1980-12-13 | 1981-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-13 | 1984-12-13 | 1985-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-13 | 1988-12-13 | 1989-06-14 | $7700.00 | Window Closed / Lapsed |