US3656765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
A device for sealing a rotating shaft
Assignee: Individual
•
Filing: 1970-01-13
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Granted: 1972-04-18
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Expires: 1990-01-13
Abstract
Abstract A device for sealing a rotating shaft under wide pressure ranges from extremely high vacuum up to extremely high pressure, in which a contact surface is formed between a sealing seat of washer configuration and the end of a rotating ring fixed to the rotating shaft, or the end of a fixed ring fixed to a gland. An O-ring and spring-holding washer are installed at the back side of the sealing seat and they are pressed by a spring, or liquid pressure so that the O-ring is pressed against the sealing seat.
Inventors
- 👤 Kennosuke Nakagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:19
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/38; Y; Y10; Y10S; Y10S277/00; Y10S277/91
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
108 words
Apparatus for the sealing of a rotating shaft, said apparatus comprising a rotatable ring coupled to the shaft to rotate therewith, a fixed ring, a sealing seat of washer configuration having one surface facing one of said rings, an O-ring at the opposite surface of said sealing seat, and means pressing said Oring against said opposite surface of said sealing seat to form a contacting surface to seal the rotating part, said sealing seat being relatively thin and of metal to provide a flexibility so that uniform pressure is applied to the ring facing the seat to provide tight and uniform sealing between the rotatable and fixed rings.
Claim 2
Dependent Claim
108 words
Apparatus for the sealing of a rotating shaft, said apparatus comprising a rotatable ring coupled to the shaft to rotate therewith, a fixed ring, a sealing seat of washer configuration having one surface facing one of said rings, an O-ring at the opposite surface of said sealing seat, and means pressing said Oring against said opposite surface of said sealing seat to form a contacting surface to seal the rotating part, said sealing seat being relatively thin and of metal to provide a flexibility so that uniform pressure is applied to the ring facing the seat to provide tight and uniform sealing between the rotatable and fixed rings.
Claim 3
Dependent Claim
28 words
Apparatus as claimed in claim 1 wherein said means pressing said O-ring against said sealing seat comprises a spring, a washer being interposed between said spring and seat.
Claim 4
Dependent Claim
26 words
Apparatus as claimed in claim 1 wherein said O-ring is deformed by said means and is pressed against the fixed ring in intimate sealing contact therewith.
Claim 5
Dependent Claim
35 words
Apparatus as claimed in claim 1 wherein said sealing seat includes a radially projecting tongue, said fixed ring having a groove receiving said tongue and preventing relative rotation between said sealing seat and fixed ring.
Claim 6
Dependent Claim
57 words
Apparatus as claimed in claim 1 wherein said fixed ring comprises a cylindrical box member including inner and outer cylindrical bodies, said inner cylindrical body having a bore in which saId rotating shaft is rotatably received, said O-ring being in sealing contact at the inner and outer peripheries thereof with said inner and outer cylindrical bodies respectively.
Claim 7
Dependent Claim
39 words
Apparatus as claimed in claim 5 wherein said means pressing said O-ring against said seat comprises a chamber between said inner and outer cylindrical bodies and closed by said O-ring, and means for pressurizing said chamber with a fluid.
Claim 8
Dependent Claim
25 words
Apparatus as claimed in claim 6 wherein the pressurizing means comprises a reservoir for said fluid, and a pressure regulation apparatus connected to said reservoir.
Claim 9
Dependent Claim
21 words
Apparatus as claimed in claim 1 wherein said sealing seat is constituted of a material different from that of said rings.
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) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |