US4641842A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft sealing device with floating seal member
Assignee: Ebara Corp
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Filing: 1986-03-26
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Granted: 1987-02-10
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Expires: 2006-03-26
Abstract
Abstract A shaft sealing device comprises a rotation shaft passing through a casing. A rotation ring mechanism is affixed to the rotation shaft within the casing, with a mechanical seal member located within the casing, with a mechanical seal member located within the casing and cooperating with one side of the rotation ring mechansim. A non-rotatable, floating seal member is also located in the casing, and is liquid-tightly fitted onto the outer circumference of the rotation ring mechanism. One side of the floating seal member contacts an inner surface of the casing, so that a sealing chamber for lubrication liquid is formed within the casing, by the rotation ring mechanism, mechanical and floating seal members.
Inventors
- 👤 Tadashi Kataoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:32
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3404; F16J15/40; F16J15/44; F16J15/441
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
134 words
A shaft sealing device, comprising an outer casing having an inner surface, a rotatable shaft situated within said casing and passing therethrough, rotation ring means, having opposed sides and an outer circumferentially-extending surface, mounted on said shaft for rotation therewith, a mechanical seal member situated within said casing and co-operating with one of said sides of said rotation ring means, a floating seal member situated within said casing and fixed against rotation with said shaft, said floating seal member being mounted on said outer circumferential surface of said rotation ring means and forming a fluid-tight seal therewith, a side of said floating seal member contacting said inner surface of said casing, wherein a sealing chamber for lubricant is formed within said casing by said rotation ring means, mechanical seal member, and floating seal member.
Claim 2
Dependent Claim
134 words
A shaft sealing device, comprising an outer casing having an inner surface, a rotatable shaft situated within said casing and passing therethrough, rotation ring means, having opposed sides and an outer circumferentially-extending surface, mounted on said shaft for rotation therewith, a mechanical seal member situated within said casing and co-operating with one of said sides of said rotation ring means, a floating seal member situated within said casing and fixed against rotation with said shaft, said floating seal member being mounted on said outer circumferential surface of said rotation ring means and forming a fluid-tight seal therewith, a side of said floating seal member contacting said inner surface of said casing, wherein a sealing chamber for lubricant is formed within said casing by said rotation ring means, mechanical seal member, and floating seal member.
Claim 3
Dependent Claim
32 words
The device of claim 1, wherein said rotation ring means comprise a rotatable ring mounted upon said rotatable shaft, and a fixing member for fixing said rotatable ring onto said rotatable shaft.
Claim 4
Dependent Claim
19 words
The device of claim 2, wherein said floating member is mounted upon said outer circumference of said rotatable ring.
Claim 5
Dependent Claim
19 words
The device of claim 2, wherein said floating member is mounted upon said outer circumference of said fixing member.
Claim 6
Dependent Claim
40 words
The device of claim 4, wherein said rotation ring means additionally comprise a ring-like groove formed in said fixing member adjacent said rotatable ring to be substantially concentric with said rotatable shaft, and an O-ring seated in said ring-like groove.
Claim 7
Dependent Claim
15 words
The device of claim 1, wherein said rotatable shaft is isolated from said sealing chamber.
Claim 8
Dependent Claim
20 words
The device of claim 3, wherein said fixing member of said rotation ring means is isolated from said sealing chamber.
Claim 9
Dependent Claim
68 words
The device of claim 2, wherein said mechanical seal member comprises an axially-movable ring disposed to contact said rotatable ring along a slidable face thereof, said axially-movable ring disposed in a hole within said casing substantially concentric with said rotatable shaft, and a compression spring disposed between a wall of said casing and said axially-movable ring to urge the same against said slidable face of said rotatable ring.
Claim 10
Dependent Claim
12 words
The device of claim 2, wherein said fixing member is a nut.
Claim 11
Dependent Claim
35 words
The device of claim 2, additionally comprising a stopper pin affixed to said casing and disposed within a groove formed on an outer circumference of said floating seal member, for preventing rotation of the same.
References Cited (Backward Citations)
US2883212A
Cited
US3443815A
Cited
JPS49116435A
Cited
JPS49116438A
Cited
JPS49116436A
Cited
JPS49116437A
Cited
SU666348A1
Cited
JPS57192672A
Cited
US4451048A
Cited
US4489951A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-09 | 1990-08-11 | 1991-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-09 | 1994-08-11 | 1995-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-09 | 1998-08-11 | 1999-02-10 | $7700.00 | Window Closed / Lapsed |