Patent US3899225A successfully refreshed from Google Patents.
US3899225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radial and thrust bearing
Assignee: Timken US LLC
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Filing: 1973-11-29
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Granted: 1975-08-12
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Expires: 1993-11-29
Abstract
Abstract A bearing is disclosed comprising a rotatable shaft and a coaxial unitary member. The shaft is shaped to provide a ball inner race and at least one roller inner race. The coaxial member has an inside annular protrusion extending toward the shaft. The protrusion has a curved shoulder on one side and a straight shoulder on the other side. The curved shoulder will support a high axial thrust along one direction of the shaft; the straight shoulder will support a relatively low axial thrust applied along the shaft in the opposite direction. The outer unitary member is made by cold-forming a low carbonsteel tube with a die, carburizing, and then heating the thusformed outer race in an inert atmosphere, sizing, and which after quenching, provides a hard outer race. The shaft is made by rolling the ball inner race and at least one roller race into a rod which has been carburized and then heated in an inert atmosphere.
Inventors
- 👤 J Russell Elmore
- 👤 Carl F Benson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:54
CPC Classifications
F; F16; F16C; F16C19/00; F16C19/49; B; B21; B21D; B21D53/00; B21D53/10; F16C33/00; F16C33/30; F16C33/58; F16C33/60; F16C33/605; F16C33/64; F16C2360/00; F16C2360/44
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
145 words
In combination: a rotatable shaft shaped to provide a ball inner race and at least one roller inner race adjacent the ball race; a coaxial unitary member having an annular protrusion extending toward the shaft, said annular protrusion having a curved shoulder on one axial side and a substantially straight shoulder on its oTher axial side, the curved shoulder providing the ball outer race, and at least a portion of the inside perimeter of the unitary member providing the roller outer race; balls positioned in the ball races; rollers positioned in the roller races; and a thrust collar fixedly mounted about the shaft adjacent the axial outer ends of the rollers, and thrust transmitting means including at least the thrust collar and further including a member bearing directly against the substantially straight shoulder for transmitting thrust from the shaft and against the substantially straight shoulder.
Claim 2
Dependent Claim
145 words
In combination: a rotatable shaft shaped to provide a ball inner race and at least one roller inner race adjacent the ball race; a coaxial unitary member having an annular protrusion extending toward the shaft, said annular protrusion having a curved shoulder on one axial side and a substantially straight shoulder on its oTher axial side, the curved shoulder providing the ball outer race, and at least a portion of the inside perimeter of the unitary member providing the roller outer race; balls positioned in the ball races; rollers positioned in the roller races; and a thrust collar fixedly mounted about the shaft adjacent the axial outer ends of the rollers, and thrust transmitting means including at least the thrust collar and further including a member bearing directly against the substantially straight shoulder for transmitting thrust from the shaft and against the substantially straight shoulder.
Claim 3
Dependent Claim
15 words
The combination of claim 1 wherein the rollers bear directly against the substantially straight shoulder.
Claim 4
Dependent Claim
40 words
The combination of claim 1 wherein: a thrust ring spacer is mounted within the unitary member with one edge in contact with the substantially straight shoulder and the other edge in contact with the axial inner ends of the rollers.
Claim 5
Dependent Claim
29 words
The combination of claim 3 wherein: a cage separates the rollers, and the thrust ring spacer has a plurality of projections which limit the axial movement of the cage.
Claim 6
Dependent Claim
62 words
The combination of claim 1 wherein: the shaft is shaped to provide an inner roller race adjacent each side of the ball race, there are two sets of rollers with one set located adjacent each side of the ball race and a second thrust collar is fixedly mounted about the shaft to limit the axial movement of the second set of rollers.
Claim 7
Dependent Claim
24 words
The combination of claim 1 wherein: the minor diameter of the ball race on the shaft is approximately the same as the shaft diameter.
Claim 8
Dependent Claim
22 words
The combination of claim 1 wherein: the minor diameter of the ball race on the shaft is less than the shaft diameter.
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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |