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US3647273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylindrical roller bearing cage
Assignee: FMC Corp
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Filing: 1970-03-23
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Granted: 1972-03-07
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Expires: 1990-03-23
Abstract
Abstract This invention relates to a cage for cylindrical roller bearings wherein each spacer between adjacent roller bearings have compound curved surfaces facing the cylinder surfaces of the roller.
Inventors
- 👤 Eugene E Pfaffenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:09
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/30; F16C33/46; F16C33/4617; F16C33/4664; F16C33/467; F16C33/4676; F16C33/66; F16C33/6637; F16C33/6681; F16C19/00; F16C19/22; F16C19/24; F16C19/26; F16C2300/00; F16C2300/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
112 words
A retainer for the rollers of a cylindrical roller bearing unit comprising a pair of spaced end rings, and a plurality of equally spaced spacer bars secured between said end rings to form an annulus, each adjoining pair of bars having opposed concave surfaces adapted to receive a cylindrical roller therebetween, each concave surface being defined by two partial cylindrical surfaces formed about axes parallel to the axis of the roller and intersecting along a line, the respective centers of the radii of said partial cylindrical surfaces being spaced apart and located on opposite sides of a line tangent to the pitch circle of the rollers at the center of each roller.
Claim 2
Dependent Claim
112 words
A retainer for the rollers of a cylindrical roller bearing unit comprising a pair of spaced end rings, and a plurality of equally spaced spacer bars secured between said end rings to form an annulus, each adjoining pair of bars having opposed concave surfaces adapted to receive a cylindrical roller therebetween, each concave surface being defined by two partial cylindrical surfaces formed about axes parallel to the axis of the roller and intersecting along a line, the respective centers of the radii of said partial cylindrical surfaces being spaced apart and located on opposite sides of a line tangent to the pitch circle of the rollers at the center of each roller.
Claim 3
Dependent Claim
41 words
A retainer according to claim 1 wherein said two partial cylindrical surfaces are formed by radii of equal length and wherein said radii Are slightly larger in size than the diameter of the cylindrical roller disposed between said adjoining spacer bars.
Claim 4
Dependent Claim
20 words
A retainer according to claim 2 wherein said radii are approximately 0.500 inches and said roller diameter is 0.4985 inches.
Claim 5
Dependent Claim
164 words
A retainer for the rollers of a cylindrical roller bearing unit comprising a pair of spaced end rings, and a plurality of equally spaced spacer bars secured between said end rings to form an annulus, each adjoining pair of bars having opposed concave surfaces adapted to receive a cylindrical roller therebetween, each concave surface being defined by two partial cylindrical surfaces formed about axes parallel to the axis of the roller and intersecting along a line, said two partial cylindrical surfaces being further formed by radii of equal length and said radii are slightly larger in size than the diameter of the cylindrical roller disposed between said adjoining spacer bars, the differential between said radii and said roller diameter defining a lubrication pocket between said roller and each spacer bar surface, said pocket being relatively wide at its central area and tapering in opposite directions away from the area to define wedge-shaped entrances between the roller surface and the surface of the spacer bar.
Claim 6
Dependent Claim
164 words
A retainer for the rollers of a cylindrical roller bearing unit comprising a pair of spaced end rings, and a plurality of equally spaced spacer bars secured between said end rings to form an annulus, each adjoining pair of bars having opposed concave surfaces adapted to receive a cylindrical roller therebetween, each concave surface being defined by two partial cylindrical surfaces formed about axes parallel to the axis of the roller and intersecting along a line, said two partial cylindrical surfaces being further formed by radii of equal length and said radii are slightly larger in size than the diameter of the cylindrical roller disposed between said adjoining spacer bars, the differential between said radii and said roller diameter defining a lubrication pocket between said roller and each spacer bar surface, said pocket being relatively wide at its central area and tapering in opposite directions away from the area to define wedge-shaped entrances between the roller surface and the surface of the spacer bar.
Claim 7
Dependent Claim
37 words
A retainer according to claim 4 wherein said differential between said radii and said roller diameter is such that a wedge-shaped entrance is formed between each edge of the concave spacer bar surface and the adjacent roller.
Claim 8
Dependent Claim
132 words
A retainer for the rollers of a cylindrical roller bearing unit comprising a pair of spaced end rings, and a plurality of equally spaced spacer bars secured between said end rings to form an annulus, each adjoining pair of bars having opposed concave surfaces adapted to receive a cylindrical roller therebetween, each concave surface being defined by two partial cylindrical surfaces formed about axes parallel to the axis of the roller and intersecting along a line, said two partial cylindrical surfaces being formed by radii that are slightly larger in size than the diameter of the cylindrical roller and the axis for the outermost surface is radially inward of the pitch circle of the rollers of the bearing and the axis for the innermost surface is radially outward of said pitch circle.
Claim 9
Dependent Claim
132 words
A retainer for the rollers of a cylindrical roller bearing unit comprising a pair of spaced end rings, and a plurality of equally spaced spacer bars secured between said end rings to form an annulus, each adjoining pair of bars having opposed concave surfaces adapted to receive a cylindrical roller therebetween, each concave surface being defined by two partial cylindrical surfaces formed about axes parallel to the axis of the roller and intersecting along a line, said two partial cylindrical surfaces being formed by radii that are slightly larger in size than the diameter of the cylindrical roller and the axis for the outermost surface is radially inward of the pitch circle of the rollers of the bearing and the axis for the innermost surface is radially outward of said pitch circle.
References Cited (Backward Citations)
US2705666A
Cited
US3141711A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |