US3625580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Journal bearing for fluctuating loads
Assignee: Motors Liquidation Co
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Filing: 1970-02-19
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Granted: 1971-12-07
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Expires: 1990-02-19
Abstract
Abstract A journal bearing adapted for use in main and connecting rod journals of internal combustion engines and like applications, wherein high-fluctuating loads result in deformation of the bearing containing member, with consequent close-in adjacent the split line between the two bearing shells. The bearing comprises a pair of bearing shells, preferably including a central concentric section having an inner surface centered on the bearing axis and connecting with eccentric end sections providing for progressively increasing clearance from the associated journal adjacent the bearing split line. The eccentric end sections extend sufficiently far from the split line to prevent bearing distress due to close-in. High-load capacity and low-oil flow requirements are attained by the use of a relatively large concentric central section.
Inventors
- 👤 Arnold O Dehart
- 👤 Duane H Harwick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:49
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/06; F16C33/10; F16C33/1025; F16C33/106; F16C33/1075; F16C17/00; F16C17/02; F16C17/022; F16C17/028; F16C9/00; F16C9/04; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2142; Y10T74/2143
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
247 words
A journal bearing for internal combustion engines and the like wherein a rotatable journal subject to significantly fluctuating loads is received within a cylindrical opening defined jointly by a pair of detachably secured members, said bearing comprising a pair of semicylindrical bearing shells adapted to be opposedly received within such opening to define a generally cylindrical inwardly facing bearing surface having a central axis, said bearing surface being adapted to surround such journal in close fitting bearing relationship with clearance for formation therebetween of a load carrying lubricating oil film, at least one of said bearing shells having its said bearing surface, exclusive of lubricant openings, grooves and the like, divided circumferentially into a concentric central portion and a pair of eccentric end portions, said portions each extending axially the full width of their respective bearing shell, said concentric central portion being equidistant at all points from said central axis and extending circumferentially for an angular dimension of not more than about 140* and not less than about 60*, said eccentric end portions extending outwardly from the opposite ends of said central portion and of progressively increasing distance from said central axis toward the ends of said shell, and said eccentric end portions each being not less than one-half inch in length, whereby sufficient additional journal clearance is provided adjacent the abutting ends of the two bearing shells to accommodate close-in during operation while maintaining a high load carrying capacity with a minimum flow of lubricating oil.
Claim 2
Dependent Claim
247 words
A journal bearing for internal combustion engines and the like wherein a rotatable journal subject to significantly fluctuating loads is received within a cylindrical opening defined jointly by a pair of detachably secured members, said bearing comprising a pair of semicylindrical bearing shells adapted to be opposedly received within such opening to define a generally cylindrical inwardly facing bearing surface having a central axis, said bearing surface being adapted to surround such journal in close fitting bearing relationship with clearance for formation therebetween of a load carrying lubricating oil film, at least one of said bearing shells having its said bearing surface, exclusive of lubricant openings, grooves and the like, divided circumferentially into a concentric central portion and a pair of eccentric end portions, said portions each extending axially the full width of their respective bearing shell, said concentric central portion being equidistant at all points from said central axis and extending circumferentially for an angular dimension of not more than about 140* and not less than about 60*, said eccentric end portions extending outwardly from the opposite ends of said central portion and of progressively increasing distance from said central axis toward the ends of said shell, and said eccentric end portions each being not less than one-half inch in length, whereby sufficient additional journal clearance is provided adjacent the abutting ends of the two bearing shells to accommodate close-in during operation while maintaining a high load carrying capacity with a minimum flow of lubricating oil.
Claim 3
Dependent Claim
250 words
A journal bearing for internal combustion engines and the like wherein a rotatable journal subject to significantly fluctuating loads is received within a cylindRical opening defined jointly by a pair of detachably secured members, said bearing comprising a pair of semicylindrical bearing shells adapted to be opposedly received within such opening to define a generally cylindrical inwardly facing bearing surface having a central axis, said bearing surface being adapted to surround such journal in close fitting bearing relationship with clearance for formation therebetween of a load carrying lubricating oil film, each said bearing shell having its said bearing surface exclusive of lubricant openings, grooves and the like, divided circumferentially into a concentric central portion and a pair of eccentric end portions, said portions each extending axially the full width of their respective bearing shell, said concentric central portion being equidistant at all points from said central axis and extending circumferentially for an angular dimension of not more than about 140* and not less than about 60* , said eccentric end portions extending outwardly from the opposite ends of their respective central portion and of progressively increasing distance from said central axis toward the ends of their respective bearing shell, and said eccentric end portions each being not less than one-half inch in length, whereby sufficient additional journal clearance is provided adjacent the abutting ends of the two bearing shells to accommodate close-in during operation while maintaining high load carrying capacity for the bearing with a minimum flow of lubricating oil.
Claim 4
Dependent Claim
250 words
A journal bearing for internal combustion engines and the like wherein a rotatable journal subject to significantly fluctuating loads is received within a cylindRical opening defined jointly by a pair of detachably secured members, said bearing comprising a pair of semicylindrical bearing shells adapted to be opposedly received within such opening to define a generally cylindrical inwardly facing bearing surface having a central axis, said bearing surface being adapted to surround such journal in close fitting bearing relationship with clearance for formation therebetween of a load carrying lubricating oil film, each said bearing shell having its said bearing surface exclusive of lubricant openings, grooves and the like, divided circumferentially into a concentric central portion and a pair of eccentric end portions, said portions each extending axially the full width of their respective bearing shell, said concentric central portion being equidistant at all points from said central axis and extending circumferentially for an angular dimension of not more than about 140* and not less than about 60* , said eccentric end portions extending outwardly from the opposite ends of their respective central portion and of progressively increasing distance from said central axis toward the ends of their respective bearing shell, and said eccentric end portions each being not less than one-half inch in length, whereby sufficient additional journal clearance is provided adjacent the abutting ends of the two bearing shells to accommodate close-in during operation while maintaining high load carrying capacity for the bearing with a minimum flow of lubricating oil.
Claim 5
Dependent Claim
54 words
The bearing of claim 2 wherein said eccentric end portions of the respective bearing shells are of substantially equal circumferential dimension and are arcs of respective common cylinders having their centers located on eccentric axes parallel to and spaced from said central axis substantially equal amounts on the sides opposite the respective bearing shells.
Claim 6
Dependent Claim
30 words
The bearing of claim 3 wherein the maximum distance from the central axis to the bearing surface is on the order of about 0.002 inches greater than the minimum distance.
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) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |