Patent US3893733A successfully refreshed from Google Patents.
US3893733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foil bearing arrangements
Assignee: Garrett Corp
•
Filing: 1972-12-13
•
Granted: 1975-07-08
•
Expires: 1992-12-13
Abstract
Abstract A self-pressurizing hydrodynamic foil bearing having resilient foils providing support between a movable and stationary bearing member and further having resilient foil supports for supporting and stiffening the foils. The foil supports additionally generate Coulomb friction with another bearing member for enhancing the damping characteristics of the bearing.
Inventors
- 👤 Alexander Silver
- 👤 Johan A Friedericy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:02
CPC Classifications
F; F16; F16C; F16C17/00; F16C17/04; F16C17/042; F16C17/02; F16C17/024; F16C17/10; F16C37/00; F16C37/002; F16C43/00; F16C43/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
112 words
A hydrodynamic fluid bearing comprising: first and second bearing elements movable with respect to each other and spaced apart to form a fluid gap therebetween; at least one bearing foil attached to one of said bearing elements said foil loosely conforming to the shape of said bearing elements; foil stiffening means attached to one of said bearing members and contacting said bearing foil at at least one point for increasing the effective stiffness of said bearing foil, said foil stiffening means comprising a generally U-shaped member attached to one of said bearing means at the closed end of said member and the bifurcated open ends being in contact with said bearing foil.
Claim 2
Dependent Claim
112 words
A hydrodynamic fluid bearing comprising: first and second bearing elements movable with respect to each other and spaced apart to form a fluid gap therebetween; at least one bearing foil attached to one of said bearing elements said foil loosely conforming to the shape of said bearing elements; foil stiffening means attached to one of said bearing members and contacting said bearing foil at at least one point for increasing the effective stiffness of said bearing foil, said foil stiffening means comprising a generally U-shaped member attached to one of said bearing means at the closed end of said member and the bifurcated open ends being in contact with said bearing foil.
Claim 3
Dependent Claim
138 words
A hydrodynamic fluid bearing comprising: first and second bearing elements movable with respect to each other and spaced apart to form a fluid gap therebetween; at least one bearing foil attached to one of said bearing elements said foil loosely conforming to the shape of said bearing elements; foil stiffening means attached to one of said bearing elements and contacting said bearing foil at at least one point for increasing the effective stiffness of said bearing foil, said foil stiffening means comprising a generally U-shaped member arranged between said bearing foil and the bearing element to which said foil is attached such that the open end of said U-shaped member is in contact with said bearing element and the closed end is in contact with said foil member when said bearing elements are assembled in their operating relationship.
Claim 4
Dependent Claim
138 words
A hydrodynamic fluid bearing comprising: first and second bearing elements movable with respect to each other and spaced apart to form a fluid gap therebetween; at least one bearing foil attached to one of said bearing elements said foil loosely conforming to the shape of said bearing elements; foil stiffening means attached to one of said bearing elements and contacting said bearing foil at at least one point for increasing the effective stiffness of said bearing foil, said foil stiffening means comprising a generally U-shaped member arranged between said bearing foil and the bearing element to which said foil is attached such that the open end of said U-shaped member is in contact with said bearing element and the closed end is in contact with said foil member when said bearing elements are assembled in their operating relationship.
Claim 5
Dependent Claim
144 words
A hydrodynamic fluid bearing comprising: first and second bearing elements movable with respect to each other and spaced apart to form a fluid gap therebetween; at least one bearing foil attached to one of said bearing elements said foil loosely conforming to the shape of said bearing elements, said bearing foil comprising a plurality of overlapping bearing foils; and foil stiffening means attached to one of said bearing members and contacting said bearing foil at at least one point for increasing the effective stiffness of said bearing foil, said foil stiffening means comprising an arcuate shape formed in each of said foils intermediate the end thereof and forming an axial ridge in said foil surface, said axial ridge being arranged such that each foil is in contact with the ridge of the adjacent foil when said bearing elements are assembled in an operating relationship.
Claim 6
Dependent Claim
144 words
A hydrodynamic fluid bearing comprising: first and second bearing elements movable with respect to each other and spaced apart to form a fluid gap therebetween; at least one bearing foil attached to one of said bearing elements said foil loosely conforming to the shape of said bearing elements, said bearing foil comprising a plurality of overlapping bearing foils; and foil stiffening means attached to one of said bearing members and contacting said bearing foil at at least one point for increasing the effective stiffness of said bearing foil, said foil stiffening means comprising an arcuate shape formed in each of said foils intermediate the end thereof and forming an axial ridge in said foil surface, said axial ridge being arranged such that each foil is in contact with the ridge of the adjacent foil when said bearing elements are assembled in an operating relationship.
Claim 7
Dependent Claim
123 words
A hydrodynamic fluid bearing comprising: a shaft member rotatable about a longitudinal axis; shaft supporting means generally coaxial with said shaft member about the longitudinal axis; first resilient bearing means attached to said shaft supporting means for partially supporting said shaft member in said supporting means in connection with a dynamic fluid film; said first resilient bearing means comprising a plurality of foils loosely conformed about said shaft member between said shaft member and said shaft supporting means; and second resilient bearing means for partially supporting said first resilient bearing means, said second resilient bearing means comprising a second plurality of foils interspersed between the foils of said first resilient bearing means for increasing the effective stiffness of said first resilient bearing means.
Claim 8
Dependent Claim
123 words
A hydrodynamic fluid bearing comprising: a shaft member rotatable about a longitudinal axis; shaft supporting means generally coaxial with said shaft member about the longitudinal axis; first resilient bearing means attached to said shaft supporting means for partially supporting said shaft member in said supporting means in connection with a dynamic fluid film; said first resilient bearing means comprising a plurality of foils loosely conformed about said shaft member between said shaft member and said shaft supporting means; and second resilient bearing means for partially supporting said first resilient bearing means, said second resilient bearing means comprising a second plurality of foils interspersed between the foils of said first resilient bearing means for increasing the effective stiffness of said first resilient bearing means.
Claim 9
Dependent Claim
146 words
A hydrodynamic fluid bearing comprising: a shaft member rotatable about a longitudinal axis; shaft supporting means generally coaxial with said shaft member about the longitudinal axis; first resilient bearing means attached to said shaft supporting means for partially supporting said shaft member in said supporting means in connection with a dynamic fluid film; said first resilient bearing means comprising a plurality of foils loosely conformed about said shaft member between said shaft member and said shaft supporting means; and second resilient bearing means for partially supporting said first resilient bearing means, said second resilient bearing means comprising a plurality of generally U-shaped members attached to said shaft supporting means at the closed end of said U and each of said U-shaped members having the legs of the open end thereof in contact with one of said first resilient bearing means for increasing the effective stiffness thereof.
Claim 10
Dependent Claim
146 words
A hydrodynamic fluid bearing comprising: a shaft member rotatable about a longitudinal axis; shaft supporting means generally coaxial with said shaft member about the longitudinal axis; first resilient bearing means attached to said shaft supporting means for partially supporting said shaft member in said supporting means in connection with a dynamic fluid film; said first resilient bearing means comprising a plurality of foils loosely conformed about said shaft member between said shaft member and said shaft supporting means; and second resilient bearing means for partially supporting said first resilient bearing means, said second resilient bearing means comprising a plurality of generally U-shaped members attached to said shaft supporting means at the closed end of said U and each of said U-shaped members having the legs of the open end thereof in contact with one of said first resilient bearing means for increasing the effective stiffness thereof.
Claim 11
Dependent Claim
153 words
A hydrodynamic fluid bearing comprising: a shaft member rotatable about a longitudinal axis; shaft supporting means generally coaxial with said shaft member about the longitudinal axis; first resilient bearing means attached to said shaft supporting means for partially supporting said shaft member in said supporting means in connection with a dynamic fluid film; said first resilient bearing means comprising a plurality of foils loosely conformed about said shaft member between saiD shaft member and said shaft supporting means; and second resilient bearing means for partially supporting said first resilient bearing means, said second resilient bearing means comprising a plurality of generally U-shaped members, one of said members being operatively arranged between each of said first resilient bearing means and said shaft supporting means such that the closed end of said U-shaped member is adjacent said second resilient bearing means and the open end of said U-shaped member is adjacent said shaft supporting means.
Claim 12
Dependent Claim
153 words
A hydrodynamic fluid bearing comprising: a shaft member rotatable about a longitudinal axis; shaft supporting means generally coaxial with said shaft member about the longitudinal axis; first resilient bearing means attached to said shaft supporting means for partially supporting said shaft member in said supporting means in connection with a dynamic fluid film; said first resilient bearing means comprising a plurality of foils loosely conformed about said shaft member between saiD shaft member and said shaft supporting means; and second resilient bearing means for partially supporting said first resilient bearing means, said second resilient bearing means comprising a plurality of generally U-shaped members, one of said members being operatively arranged between each of said first resilient bearing means and said shaft supporting means such that the closed end of said U-shaped member is adjacent said second resilient bearing means and the open end of said U-shaped member is adjacent said shaft supporting means.
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) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |