US4004471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential with spherical bearing supported pinions
Assignee: Caterpillar Inc
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Filing: 1975-03-28
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Granted: 1977-01-25
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Expires: 1995-03-28
Abstract
Abstract A limited slip differential comprises a pair of face gears operatively connected together for relative rotation by a plurality of pinions each rotatably mounted on a carrier. Each pinion is secured to a shaft having each of its ends rotatably mounted on the carrier by a spherical bearing means for providing a crowned bearing surface area contact upon imposition of loads thereon during differential operation.
Inventors
- 👤 Frank E. Keske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:59
CPC Classifications
F; F16; F16H; F16H48/00; F16H48/20; F16H48/22; F16H48/06; F16H48/10; F16H48/11; F16H48/08; F16H2048/085; F16H2048/102; F16H48/38; F16H48/40
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
109 words
In a differential of the type comprising a pair of opposed face gears, a rotatable carrier disposed between said face gears and a plurality of pinion gear means rotatably mounted on said carrier with at least some of said pinion gear means meshing with said face gears for differentially permitting one face gear to rotate faster than the other face gear, the invention wherein each of said pinion gear means is mounted on a separate shaft having each end thereof rotatably mounted on said carrier by a spherical bearing means for providing a crowned bearing surface area contact therein upon imposition of loads thereon during operation of said differential.
Claim 2
Dependent Claim
109 words
In a differential of the type comprising a pair of opposed face gears, a rotatable carrier disposed between said face gears and a plurality of pinion gear means rotatably mounted on said carrier with at least some of said pinion gear means meshing with said face gears for differentially permitting one face gear to rotate faster than the other face gear, the invention wherein each of said pinion gear means is mounted on a separate shaft having each end thereof rotatably mounted on said carrier by a spherical bearing means for providing a crowned bearing surface area contact therein upon imposition of loads thereon during operation of said differential.
Claim 3
Dependent Claim
37 words
The differential of claim 1 further comprising thrust bearing means disposed between each of said pinion gear means and said carrier for counteracting axial movement of said shaft and pinion gear means upon operation of said differential.
Claim 4
Dependent Claim
53 words
The differential of claim 1 wherein each of said bearing means comprises a cylindrical bearing sleeve secured in a bore formed in said carrier and semi-spherical surface portions formed on a respective end of said shaft for engaging said bearing sleeve in said crowned bearing surface area contact upon operation of said differential.
Claim 5
Dependent Claim
36 words
The differential of claim 3 further comprising an annular flange integrally formed on an inboard end of said bearing sleeve and disposed between said carrier and said pinion gear means for providing a thrust bearing thereat.
Claim 6
Dependent Claim
50 words
The differential of claim 1 wherein each of said bearing means comprises a self-aligning bearing including a semi-spherical ball secured on a respective end of said shaft and an annular slipper secured in a bore formed in said carrier to engage said ball in said crowned bearing surface area contact.
Claim 7
Dependent Claim
31 words
The differential of claim 5 further comprising a common thrust plate disposed between each end of each of said pinion gear means and said carrier for providing a thrust bearing thereat.
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) | 1980-01-25 | 1980-07-26 | 1981-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-25 | 1984-07-26 | 1985-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-25 | 1988-07-26 | 1989-01-25 | $7700.00 | Window Closed / Lapsed |