US4964623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid filled resilient bushing
Assignee: Lord Corp
•
Filing: 1987-12-07
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Granted: 1990-10-23
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Expires: 2007-12-07
Abstract
Abstract A fluid filled resilient bushing assembly for vibration control in the radial and axial directions or combinations thereof, particularly adapted for use in a suspension system, which comprises an elongate inner rigid member and an elongate outer rigid sleeve member, a resilient member interposed between the inner and outer members. The resilient member together with the outer member defines two circumferentially and axially-spaced chambers and a restricted passageway connecting the chambers. The chambers and passageway contain an incompressible fluid. By axially and circumferentially spacing the chambers, the desired damping in the axial and radial direction is obtained.
Inventors
- 👤 Richard P. Thorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:47
CPC Classifications
F; F16; F16F; F16F13/00; F16F13/04; F16F13/06; F16F13/08; F16F13/14; F16F13/1463; F16F13/16
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
126 words
A fluid filled resilient bushing assembly comprising: an elongate inner rigid member substantially concentric about a central longitudinal axis; an elongate outer rigid cylindrical sleeve member disposed about and radially spaced from said inner member to define a space therebetween; a resilient means disposed about said inner member between said inner rigid member and said outer sleeve member; said resilient means defining at least two spaced chambers interconnected by a restricted passageway, said chambers being spaced both circumferentially and in the direction of said longitudinal axis; and an incompressible fluid filling said spaced chambers and said restricted passageway; wherein said bushing assembly provides damping of vibratory motion due to fluid motion along said longitudinal axis and the radial direction and combinations of longitudinal and radial directions.
Claim 2
Dependent Claim
126 words
A fluid filled resilient bushing assembly comprising: an elongate inner rigid member substantially concentric about a central longitudinal axis; an elongate outer rigid cylindrical sleeve member disposed about and radially spaced from said inner member to define a space therebetween; a resilient means disposed about said inner member between said inner rigid member and said outer sleeve member; said resilient means defining at least two spaced chambers interconnected by a restricted passageway, said chambers being spaced both circumferentially and in the direction of said longitudinal axis; and an incompressible fluid filling said spaced chambers and said restricted passageway; wherein said bushing assembly provides damping of vibratory motion due to fluid motion along said longitudinal axis and the radial direction and combinations of longitudinal and radial directions.
Claim 3
Dependent Claim
24 words
A fluid filled resilient bushing assembly according to claim 1 wherein said chambers are circumferentially spaced on opposite sides of said control longitudinal axis.
Claim 4
Dependent Claim
30 words
A fluid filled resilient bushing assembly according to claim 1 or 2 wherein said restricted passageway is spirally disposed along the length of said resilient means about said inner member.
Claim 5
Dependent Claim
133 words
A fluid filled resilient bushing assembly substantially concentric about a central longitudinal axis for vibration control in either the longitudinal direction or radial direction or combination thereof by inducing suitable damping due to fluid motion comprising an elongate inner rigid member concentric about said central longitudinal axis; an elongate outer rigid cylindrical sleeve member concentrically disposed about and radially spaced from said inner member to define an annular space therebetween; a resilient means disposed about said inner member between said inner rigid member and said outer sleeve member; said resilient means together with said outer member defining at least two spaced chambers interconnected by a restricted passageway, said chambers being spaced both circumferentially and in the direction of said longitudinal axis; and an incompressible fluid filling said spaced chambers and said restricted passageway.
Claim 6
Dependent Claim
133 words
A fluid filled resilient bushing assembly substantially concentric about a central longitudinal axis for vibration control in either the longitudinal direction or radial direction or combination thereof by inducing suitable damping due to fluid motion comprising an elongate inner rigid member concentric about said central longitudinal axis; an elongate outer rigid cylindrical sleeve member concentrically disposed about and radially spaced from said inner member to define an annular space therebetween; a resilient means disposed about said inner member between said inner rigid member and said outer sleeve member; said resilient means together with said outer member defining at least two spaced chambers interconnected by a restricted passageway, said chambers being spaced both circumferentially and in the direction of said longitudinal axis; and an incompressible fluid filling said spaced chambers and said restricted passageway.
Claim 7
Dependent Claim
29 words
A fluid filled resilient bushing assembly according to claim 4 wherein said chambers are circumferentially spaced oppositely about said central longitudinal axis adjacent opposite ends of said resilient means.
Claim 8
Dependent Claim
34 words
A fluid filled resilient bushing assembly according to claim 4 or 5 wherein said restricted passageway is spirally disposed along the length of said resilient means between said resilient means and said outer member.
Claim 9
Dependent Claim
16 words
A fluid filled resilient bushing assembly according to claim 6 wherein said resilient means is elastomer.
Claim 10
Dependent Claim
26 words
A fluid filled resilient bushing assembly according to claim 1 or 4 wherein said restricted passageway is defined by said resilient means and said outer member.
Claim 11
Dependent Claim
28 words
A fluid filled resilient bushing assembly according to claim 1 wherein the cross section of said chambers is enlarged relative to the cross section of said restricted passageway.
Claim 12
Dependent Claim
128 words
A fluid filled resilient bushing assembly consisting essentially of: an elongate inner rigid member substantially concentric about a central longitudinal axis; an elongate outer rigid cylindrical sleeve member disposed about and radially spaced from said inner member to define a space therebetween; a resilient means disposed about said inner member between said inner rigid member and said outer sleeve member; said resilient means defining at least two spaced chambers interconnected by a restricted passageway, said chambers being spaced both circumferentially and in the direction of said longitudinal axis; and an incompressible fluid filling said spaced chambers and said restricted passageway; wherein said bushing assembly provides damping of vibration motion due to fluid-motion along said longitudinal axis and in the radial direction and combinations of longitudinal and radial directions.
Claim 13
Dependent Claim
128 words
A fluid filled resilient bushing assembly consisting essentially of: an elongate inner rigid member substantially concentric about a central longitudinal axis; an elongate outer rigid cylindrical sleeve member disposed about and radially spaced from said inner member to define a space therebetween; a resilient means disposed about said inner member between said inner rigid member and said outer sleeve member; said resilient means defining at least two spaced chambers interconnected by a restricted passageway, said chambers being spaced both circumferentially and in the direction of said longitudinal axis; and an incompressible fluid filling said spaced chambers and said restricted passageway; wherein said bushing assembly provides damping of vibration motion due to fluid-motion along said longitudinal axis and in the radial direction and combinations of longitudinal and radial directions.
Claim 14
Dependent Claim
24 words
A fluid filled resilient bushing assembly according to claim 1 wherein said chambers are circumferentially spaced on opposite sides of said central longitudinal axis.
Claim 15
Dependent Claim
30 words
A fluid filled resilient bushing assembly according to claim 1 or 2 wherein said restricted passageway is spirally disposed along the length of said resilient means about said inner member.
References Cited (Backward Citations)
US3147964A
Cited
US3642268A
Cited
US3698703A
Cited
US4121813A
Cited
JPS5663141A
Cited
US4377216A
Cited
US4535976A
Cited
US4588174A
Cited
US4605207A
Cited
US4690389A
Cited
JPS61144444A
Cited
JPS61165040A
Cited
JPS61180036A
Cited
DE3519016A1
Cited
JPS61270533A
Cited
JPS61274131A
Cited
US4753421A
Cited
US4693456A
Cited
DE3632612A1
Cited
US4763884A
Cited
US4667942A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-10-22 | 1994-04-23 | 1994-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-22 | 1998-04-23 | 1998-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-22 | 2002-04-23 | 2002-10-23 | $7700.00 | Window Closed / Lapsed |