Patent US5380100A successfully refreshed from Google Patents.
US5380100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Squeeze film damper covered by torus shells
Assignee: Individual
•
Filing: 1994-02-04
•
Granted: 1995-01-10
•
Expires: 2014-02-04
Abstract
Abstract A squeeze film damper covered by a pair of flexible torus shells, wherein the damping fluid is confined. The squeeze film provides the damping. The torus shells provide the stiffness within the clearance of the squeeze film. The torus shells separate the damping fluid from its environment. The torus shells also serve as a damping fluid reservoir.
Inventors
- 👤 Han J. Yu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:18
CPC Classifications
F; F16; F16F; F16F15/00; F16F15/02; F16F15/023; F16F15/0237; F16C; F16C27/00; F16C27/04; F16C27/045; F16C19/00; F16C19/02; F16C19/04; F16C19/06; F16C2300/00; F16C2300/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
148 words
A squeeze film damper comprising a damper outer ring having an outside surface, an inside surface, a first side surface, and a second side surface, a damper inner ring having an outside surface, an inside surface, a first side surface, and a second side surface, whereby the damper outer ring inside surface is proximate the damper inner ring outside surface so that a clearance of the squeeze film is provided, and a pair of torus shells, one connecting the first side surface of the damper outer ring and the first side surface of the damper inner ring, and one connecting the second side surface of the damper outer ring and the second side surface of the damper inner ring, so that the torus shells provide the stiffness within the clearance of the squeeze film, separate the damping fluid from its environment, and serve as a damping fluid reservoir.
Claim 2
Dependent Claim
148 words
A squeeze film damper comprising a damper outer ring having an outside surface, an inside surface, a first side surface, and a second side surface, a damper inner ring having an outside surface, an inside surface, a first side surface, and a second side surface, whereby the damper outer ring inside surface is proximate the damper inner ring outside surface so that a clearance of the squeeze film is provided, and a pair of torus shells, one connecting the first side surface of the damper outer ring and the first side surface of the damper inner ring, and one connecting the second side surface of the damper outer ring and the second side surface of the damper inner ring, so that the torus shells provide the stiffness within the clearance of the squeeze film, separate the damping fluid from its environment, and serve as a damping fluid reservoir.
Claim 3
Dependent Claim
34 words
The squeeze film damper of claim 1, further characterized by a fluid supply hole connecting the inside surface and the outside surface of the outer ring and a plug to seal the damper completely.
Claim 4
Dependent Claim
19 words
The squeeze film damper of claim 2, further characterized by a bearing retaining rib and a bearing retainer ring.
Claim 5
Dependent Claim
18 words
The squeeze film damper of claim 2, further characterized by a recess to distribute the damping fluid evenly.
Claim 6
Dependent Claim
19 words
The squeeze film damper of claim 4, further characterized by a bearing retaining rib and a bearing retainer ring.
Claim 7
Dependent Claim
41 words
The squeeze film damper of claim 1, further characterized by a fluid supply hole and a fluid discharge hole, each connecting the inside surface and the outside surface of the damper outer ring to supply and discharge fluid continuously during operation.
Claim 8
Dependent Claim
19 words
The squeeze film damper of claims 6, further characterized by a bearing retaining rib and a bearing retainer ring.
Claim 9
Dependent Claim
18 words
The squeeze film damper of claim 6, further characterized by a recess to distribute the damping fluid evenly.
Claim 10
Dependent Claim
19 words
The squeeze film damper of claim 8, further characterized by a bearing retaining rib and a bearing retainer ring.
References Cited (Backward Citations)
US421089A
Cited
US2631901A
Cited
US3091103A
Cited
US3415470A
Cited
US4134309A
Cited
US4213661A
Cited
US4781077A
Cited
US5228784A
Cited
US5211489A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-01-09 | 1998-07-11 | 1999-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-01-09 | 2002-07-11 | 2003-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-01-09 | 2006-07-11 | 2007-01-10 | $7700.00 | Window Closed / Lapsed |