US3602555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Journal bearing
Assignee: Kearfott Guidance and Navigation Corp
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Filing: 1969-09-18
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Granted: 1971-08-31
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Expires: 1989-09-18
Abstract
Abstract A journal bearing for a rotating mass, wherein a lubricating fluid is disposed in a bearing cavity defined between an inner bearing member and an outer bearing member. One of the bearing surfaces is provided with at least two sets of grooves, the grooves of each set adapted to impel said fluid axially with respect to said cavity towards a common point.
Inventors
- 👤 Harvey Hendler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:29
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/06; F16C33/10; F16C33/1025; F16C33/106; F16C33/107
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
278 words
A hydrodynamic bearing structure for providing a rotatable fixed-end cantilever support for one end of a rotating mass cantilevered therefrom, comprising an inner shaft bearing member having a longitudinal axis, said inner shaft member being arranged to provide a rotatable fixed-end cantilever support for one end of the rotating mass cantilevered therefrom, an outer journal bearing member extending coaxially with said inner bearing member, said outer journal bearing member being arranged to resist a transverse force and a bending moment transmitted through said inner shaft member from said rotating mass, the inner cylindrical surface of said outer bearing member being spaced from the outer cylindrical surface of said inner bearing member to define a cylindrical bearing cavity, and a lubricating fluid disposed in said cavity, wherein said inner shaft member surface is provided with first and second axially spaced sets of grooves, said first and second sets of grooves being arranged to provide a nonuniform distribution of fluid along the axial length of said cavity and to provide a selective distribution of fluid pressure along the axial length of said inner shaft member surface, each said set of grooves having a plurality of peripherally spaced grooves, each said groove having a pair of axially spaced symmetrically arranged groove portions, each said pair of groove portions being arranged so as to impel said fluid axially with respect to said cavity towards a common annular zone to form at least two axially spaced annular zones of maximum stiffness along said journal bearing member, and wherein each groove of said first set of grooves is disposed adjacent to and in connection with a corresponding groove of said second set of grooves.
Claim 2
Dependent Claim
278 words
A hydrodynamic bearing structure for providing a rotatable fixed-end cantilever support for one end of a rotating mass cantilevered therefrom, comprising an inner shaft bearing member having a longitudinal axis, said inner shaft member being arranged to provide a rotatable fixed-end cantilever support for one end of the rotating mass cantilevered therefrom, an outer journal bearing member extending coaxially with said inner bearing member, said outer journal bearing member being arranged to resist a transverse force and a bending moment transmitted through said inner shaft member from said rotating mass, the inner cylindrical surface of said outer bearing member being spaced from the outer cylindrical surface of said inner bearing member to define a cylindrical bearing cavity, and a lubricating fluid disposed in said cavity, wherein said inner shaft member surface is provided with first and second axially spaced sets of grooves, said first and second sets of grooves being arranged to provide a nonuniform distribution of fluid along the axial length of said cavity and to provide a selective distribution of fluid pressure along the axial length of said inner shaft member surface, each said set of grooves having a plurality of peripherally spaced grooves, each said groove having a pair of axially spaced symmetrically arranged groove portions, each said pair of groove portions being arranged so as to impel said fluid axially with respect to said cavity towards a common annular zone to form at least two axially spaced annular zones of maximum stiffness along said journal bearing member, and wherein each groove of said first set of grooves is disposed adjacent to and in connection with a corresponding groove of said second set of grooves.
Claim 3
Dependent Claim
55 words
The bearing structure of claim 1 wherein the grooves in each set form a partial herringbone pattern, and wherein each set of grooves has an annular space portion which is disposed in an axial direction between the pair of groove portions in said set of grooves, said annular space portion having an outer cylindrical surface.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |