US4334721A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ball bearing
Assignee: NSK Ltd
•
Filing: 1980-07-21
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Granted: 1982-06-15
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Expires: 2000-07-21
Abstract
Abstract In a ball bearing including an outer race, an inner race and ball-like rolling members interposed between the two races, the outer race has a single arcuate orbit groove and when the orbit groove coefficient of the inner race is expressed as ##EQU1## where ρ 0 is the curvature radius of the groove bottom of the orbit groove of the inner race, ρ 1 is the curvature radius of the groove edge of said orbit groove and D is the diameter of the rolling members, 10≦F≦70.
Inventors
- 👤 Hisashi Satoh
- 👤 Yukihiro Akabane
- 👤 Yukio Shiraiwa
- 👤 Shuyou Tsuchiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:32
CPC Classifications
F; F16; F16C; F16C19/00; F16C19/02; F16C19/04; F16C19/06; F16C33/00; F16C33/30; F16C33/58; F16C33/583; F16C33/585; F16C2240/00; F16C2240/40; F16C2240/70; F16C2240/76
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
93 words
In a ball bearing including an outer race, an inner race and ball-like rolling members interposed between said two races, the improvement residing in that said outer race has a circular arcuate orbit groove and that when the orbit groove coefficient of the inner race is expressed as ##EQU3## where ρ 0 is the curvature radius of the groove bottom of the orbit groove of the inner race, ρ 1 is the curvature radius of the groove edge of said orbit groove and D is the diameter of said rolling members, 1≦ F≦70.
Claim 2
Dependent Claim
93 words
In a ball bearing including an outer race, an inner race and ball-like rolling members interposed between said two races, the improvement residing in that said outer race has a circular arcuate orbit groove and that when the orbit groove coefficient of the inner race is expressed as ##EQU3## where ρ 0 is the curvature radius of the groove bottom of the orbit groove of the inner race, ρ 1 is the curvature radius of the groove edge of said orbit groove and D is the diameter of said rolling members, 1≦ F≦70.
Claim 3
Dependent Claim
19 words
A ball bearing according to claim 1, wherein R≧0.52D where R is the groove radius of said outer race.
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) | 1985-06-14 | 1985-12-14 | 1986-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-14 | 1989-12-14 | 1990-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-14 | 1993-12-14 | 1994-06-15 | $7700.00 | Window Closed / Lapsed |