Patent US4377216A successfully refreshed from Google Patents.
US4377216A
Expired / Lapsed
US
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Vibration damping bushing
Assignee: Nissan Motor Co Ltd
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Filing: 1980-11-12
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Granted: 1983-03-22
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Expires: 2000-11-12
Abstract
Abstract A vibration damping bushing having an energy absorbing sleeve positioned about an inner sleeve and within an outer sleeve. The energy absorbing sleeve has first and second cavities positioned diametrically opposed along the axis of force applied to the bushing, and has a connecting passageway interconnecting the cavities, these cavities containing a vibration damping fluid. The passageways serve as restrictive flow orifices to restrict the flow of the fluid between the cavities, and to thereby dampen the vibration of the outer sleeve with respect to the inner sleeve.
Inventors
- 👤 Kenzo Ueno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:11
CPC Classifications
B; B60; B60G; B60G7/00; F; F16; F16F; F16F13/00; F16F13/04; F16F13/06; F16F13/08; F16F13/14; B60G2204/00; B60G2204/40; B60G2204/41; B60G2206/00; B60G2206/01; B60G2206/017; B60G2206/10; B60G2206/11
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
141 words
A vibration damping bushing comprising: (a) an outer cylindrical sleeve; (b) an inner cylindrical sleeve; (c) an energy absorbing sleeve positioned about said inner sleeve and within said outer sleeve, said energy absorbing sleeve having first and second cavities positioned diametrically opposed from each other along the axis of force applied to said bushing, and having a connecting passageway interconnecting said cavities, and a vibration damping fluid contained within said cavities, whereby said passageway serves as a restrictive flow orifice to restrict the flow of the fluid between said cavities, to thereby dampen the vibration of said outer sleeve with respect to said inner sleeve; and (d) a fourth sleeve mounted within said outer sleeve to form a fluid-tight seal between said outer sleeve and said energy absorbing sleeve to thereby fluid-seal said cavities and interconnecting passageway from said outer sleeve.
Claim 2
Dependent Claim
141 words
A vibration damping bushing comprising: (a) an outer cylindrical sleeve; (b) an inner cylindrical sleeve; (c) an energy absorbing sleeve positioned about said inner sleeve and within said outer sleeve, said energy absorbing sleeve having first and second cavities positioned diametrically opposed from each other along the axis of force applied to said bushing, and having a connecting passageway interconnecting said cavities, and a vibration damping fluid contained within said cavities, whereby said passageway serves as a restrictive flow orifice to restrict the flow of the fluid between said cavities, to thereby dampen the vibration of said outer sleeve with respect to said inner sleeve; and (d) a fourth sleeve mounted within said outer sleeve to form a fluid-tight seal between said outer sleeve and said energy absorbing sleeve to thereby fluid-seal said cavities and interconnecting passageway from said outer sleeve.
Claim 3
Dependent Claim
20 words
The vibration damping bushing as set forth in claim 1, wherein said energy absorbing sleeve has two passageways diametrically opposed.
Claim 4
Dependent Claim
21 words
The vibration damping bushing as set forth in claim 2, wherein said outer sleeve is fixed to a force transmitting rod.
Claim 5
Dependent Claim
21 words
The vibration damping bushing as set forth in claim 2, wherein said outer sleeve is pressed into a force transmitting link.
Claim 6
Dependent Claim
209 words
An automotive vehicle drive axle vibration absorbing stabilizing system for stabilizing the drive axle with respect to the vehicle body, said system comprising: (a) a first bracket connected to the axle; (b) a second bracket connected to the axle; (c) a first link connecting said first bracket to the vehicle body; and (d) a second link connecting said second bracket to the vehicle body, wherein each of said links is formed with a vibration damping bushing, comprising: (a) an outer cylindrical sleeve; (b) an inner cylindrical sleeve; and (c) an energy absorbing sleeve positioned about said inner sleeve and within said outer sleeve, said energy absorbing sleeve having first and second cavities positioned diametrically opposed from each other along the axis of said link, and having a connecting passageway interconnecting said cavities, and a vibration damping fluid contained within said cavities, whereby said passageway serves as a restrictive flow orifice to restrict the flow of fluid between said cavities, to thereby dampen the vibration of said link with respect to said inner sleeve; and (d) a fourth sleeve mounted within said outer sleeve to form a fluid-tight seal between said outer sleeve and said energy absorbing sleeve to thereby fluid-seal said cavities and interconnecting passageway from said outer sleeve.
Claim 7
Dependent Claim
209 words
An automotive vehicle drive axle vibration absorbing stabilizing system for stabilizing the drive axle with respect to the vehicle body, said system comprising: (a) a first bracket connected to the axle; (b) a second bracket connected to the axle; (c) a first link connecting said first bracket to the vehicle body; and (d) a second link connecting said second bracket to the vehicle body, wherein each of said links is formed with a vibration damping bushing, comprising: (a) an outer cylindrical sleeve; (b) an inner cylindrical sleeve; and (c) an energy absorbing sleeve positioned about said inner sleeve and within said outer sleeve, said energy absorbing sleeve having first and second cavities positioned diametrically opposed from each other along the axis of said link, and having a connecting passageway interconnecting said cavities, and a vibration damping fluid contained within said cavities, whereby said passageway serves as a restrictive flow orifice to restrict the flow of fluid between said cavities, to thereby dampen the vibration of said link with respect to said inner sleeve; and (d) a fourth sleeve mounted within said outer sleeve to form a fluid-tight seal between said outer sleeve and said energy absorbing sleeve to thereby fluid-seal said cavities and interconnecting passageway from said outer sleeve.
Claim 8
Dependent Claim
18 words
The system as set forth in claim 5, wherein said energy absorbing sleeve has two passageways diametrically opposed.
Claim 9
Dependent Claim
40 words
The system as set forth in claim 5 or 6, wherein each of said first and second links is connected through said bushing to the vehicle body at the end of the link on the side of the vehicle body.
Claim 10
Dependent Claim
46 words
The system as set forth in claim 5 or 6, wherein each of said first and second links is connected through said bushing to a corresponding one of said first and second brackets at the end of the link on the side of the corresponding bracket.
Claim 11
Dependent Claim
73 words
The system as set forth in claim 5 or 6, wherein each of said first and second links is connected through a first said bushing to the vehicle body at the end of the link on the side of the vehicle body, and is connected through a second said bushing to a corresponding one of said first and second brackets at the end of the link on the side of the corresponding bracket.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-21 | 1986-09-20 | 1987-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-21 | 1990-09-20 | 1991-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-21 | 1994-09-20 | 1995-03-22 | $7700.00 | Window Closed / Lapsed |