Patent US3677032A successfully refreshed from Google Patents.
US3677032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shell type needle bearing
Assignee: NSK Ltd
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Filing: 1970-01-20
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Granted: 1972-07-18
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Expires: 1990-01-20
Abstract
Abstract A shell type needle bearing capable of carrying an exceedingly heavy load. The outer ring of the bearing has a carburized layer on the roller contact surface and a non-carburized ductile and tough layer adjacent the carburized layer. The depth of the carburized layer is sufficient to resist the shearing stresses of the bearing load while the depth of the ductile layer is sufficient to resist cracking from sudden shock.
Inventors
- 👤 Toshio Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:34
CPC Classifications
F; F16; F16C; F16C21/00; F16C21/005; F16C19/00; F16C19/22; F16C19/44; F16C19/46; F16C19/466; F16C33/00; F16C33/30; F16C33/58; F16C33/62; F16C2240/00; F16C2240/40; F16C2240/70; F16C2240/80; F16C2240/82; F16C2240/84; F16C2361/00; F16C2361/41; Y; Y10; Y10S; Y10S464/00; Y10S464/902
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
95 words
A roller bearing comprising a cylindrical section forming an outer ring, at least one end of the cylindrical section being formed to provide an inturned portion, the cylindrical section and the inturned portion having an inner surface and an outer surface, the inner surface having a carburized layer, a portion of the inner surface carburized layer extending to the outer surface, through said cylindrical section and the remainder of the outer ring including a ductile tough metal extending from at least one inturned portion into a part of the cylindrical section of the outer ring.
Claim 2
Dependent Claim
95 words
A roller bearing comprising a cylindrical section forming an outer ring, at least one end of the cylindrical section being formed to provide an inturned portion, the cylindrical section and the inturned portion having an inner surface and an outer surface, the inner surface having a carburized layer, a portion of the inner surface carburized layer extending to the outer surface, through said cylindrical section and the remainder of the outer ring including a ductile tough metal extending from at least one inturned portion into a part of the cylindrical section of the outer ring.
Claim 3
Dependent Claim
28 words
The roller bearing according to claim 1 wherein the carburized layer on one inturned portion extends from the inner surface to the outer surface of the inturned portion.
Claim 4
Dependent Claim
24 words
The roller bearing according to claim 1 wherein the outer surface of the cylinder portion and the inturned portion have a continuous carburized layer.
Claim 5
Dependent Claim
27 words
The roller bearing according to claim 1 wherein the ductile tough metal of the cylindrical portion extends to the outer surface of at least one inturned portion.
Claim 6
Dependent Claim
125 words
A shell type needle bearing and universal joint assembly comprising at least one yoke having at least one bore therein for mounting a shell type needle bearing, the bore having a cut out portion, a shell type needle bearing having roller members and an outer ring mounted in the bore, the outer ring extending into the cut out portion of the bore, the outer ring including an outer surface and an inner surface, the inner surface having a hardened carburized layer, portions of the inner surface carburized layer in contact with the roller members extending to the outer surface, through said outer ring and the outer ring having ductile tough metal disposed radially outward from portions of the carburized layer on the inner surface thereof.
Claim 7
Dependent Claim
125 words
A shell type needle bearing and universal joint assembly comprising at least one yoke having at least one bore therein for mounting a shell type needle bearing, the bore having a cut out portion, a shell type needle bearing having roller members and an outer ring mounted in the bore, the outer ring extending into the cut out portion of the bore, the outer ring including an outer surface and an inner surface, the inner surface having a hardened carburized layer, portions of the inner surface carburized layer in contact with the roller members extending to the outer surface, through said outer ring and the outer ring having ductile tough metal disposed radially outward from portions of the carburized layer on the inner surface thereof.
Claim 8
Dependent Claim
42 words
The shell type needle bearing and universal joint assembly according to claim 5 wherein ductile tough metAl extends from the inner carburized layer to the outer surface to be positioned on the outer surface in the cut out portion of the bore.
Claim 9
Dependent Claim
22 words
A shell type needle bearing and universal joint assembly according to claim 5 wherein the entire outer surface has a carburized layer.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |