US3706239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pinion differential mechanism having internal bias torque
Assignee: Officemax Inc
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Filing: 1971-02-09
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Granted: 1972-12-19
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Expires: 1991-02-09
Abstract
Abstract A positive drive differential mechanism for use in the driveline of an automotive vehicle comprising discrete pairs of differential pinions carried by a differential carrier and side gears having a common axis that is parallel to the axes of the pinions, the pinions of each pair being in meshing engagement, one pinion of each pair engaging one side gear and the other engaging a second side gear thereby establishing a double torque delivery path from a ring gear carried by the carrier and each of two axle shafts, each shaft being connected to a separate one of the side gears to the pinions being journaled rotatably in cooperating pinion recesses formed in the carrier, thus providing an outside diameter running fit between the pinions and the carrier and establishing an inherent friction bias torque.
Inventors
- 👤 Albert F Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:55
CPC Classifications
F; F16; F16H; F16H48/00; F16H48/20; F16H48/28; F16H48/285
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
220 words
In a gear differential mechanism for use in a vehicle driveline adapted to deliver driving torque from a drive shaft to each of two axle shafts, a differential carrier housing adapted to be driven, a pair of helical side gears journaled rotatably with respect to said housing, said side gears being arranged in coaxial disposition, one side gear being adapted to be connected to one axle shaft and the other side gear being adapted to be connected to the other axle shaft, discrete pairs of differential helical pinions, said housing having pairs of cylindrical openings, a separate pinion of each pair being received within each opening and journaled therein with an outside diameter running fit, the axes of said pinions being parallel to the common axis of said side gears, one pinion of each pair meshing with the other pinion of that pair, the pinion of one pair being independent of and out of engagement with the pinion of another pair, one pinion of each pair engaging one side gear and the other pinion of each pair engaging the other side gear whereby the torque transmitted through said differential mechanism introduces gear tooth loads on said pinions which cause a frictional torque resistance as the pinions rotate within their respective pinion cavities thus introducing a torque bias in said mechanism.
Claim 2
Dependent Claim
220 words
In a gear differential mechanism for use in a vehicle driveline adapted to deliver driving torque from a drive shaft to each of two axle shafts, a differential carrier housing adapted to be driven, a pair of helical side gears journaled rotatably with respect to said housing, said side gears being arranged in coaxial disposition, one side gear being adapted to be connected to one axle shaft and the other side gear being adapted to be connected to the other axle shaft, discrete pairs of differential helical pinions, said housing having pairs of cylindrical openings, a separate pinion of each pair being received within each opening and journaled therein with an outside diameter running fit, the axes of said pinions being parallel to the common axis of said side gears, one pinion of each pair meshing with the other pinion of that pair, the pinion of one pair being independent of and out of engagement with the pinion of another pair, one pinion of each pair engaging one side gear and the other pinion of each pair engaging the other side gear whereby the torque transmitted through said differential mechanism introduces gear tooth loads on said pinions which cause a frictional torque resistance as the pinions rotate within their respective pinion cavities thus introducing a torque bias in said mechanism.
Claim 3
Dependent Claim
111 words
The combination set forth in claim 1 wherein one pinion of each pair has right hand helical gear teeth and the other pinion of that pair has left hand helical gear teeth, one end of one pinion of each pair engaging its companion side gear at one end of said one pinion, one end of the other pinion engaging its companion side gear at one end of said other pinion, said pinions being offset axially so that their adjacent other ends mesh with each other, and a spacer member situated between said side gears and supporting said pinions at the region of the meshing engagement between the pinions of each pair.
Claim 4
Dependent Claim
52 words
The combination as set forth in claim 1, wherein said carrier housing comprises two parts, pairs of pinion openings formed in each part, said parts being adapted to be joined together in abutting relationship with their respective pinion openings registering to provide a single pinion cavity for each pinion of each pair.
Claim 5
Dependent Claim
52 words
The combination as set forth in claim 2, wherein said carrier housing comprises two parts, pairs of pinion openings formed in each part, said parts being adapted to be joined together in abutting relationship with their respective pinion openings registering to provide a single pinion cavity for each pinion of each pair.
Claim 6
Dependent Claim
92 words
The combination as set forth in claim 1, wherein said carrier housing comprises two parts, pairs of pInion openings formed in each part, said parts being adapted to be joined together in abutting relationship with their respective pinion openings registering to provide a single pinion cavity for each pinion of each pair, said pinions engaging the ends of their respective cavities whereby axial components of the gear tooth loads on said pinions establish a friction torque component to complement the friction torque component due to transverse gear tooth loads on said pinions.
References Cited (Backward Citations)
US827095A
Cited
US1417797A
Cited
US2178613A
Cited
US2972265A
Cited
US3375735A
Cited
US3406593A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |