US3738192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Limited slip differential mechanisms
Assignee: Illinois Tool Works Inc
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Filing: 1971-06-29
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Granted: 1973-06-12
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Expires: 1991-06-29
Abstract
Abstract A limited slip differential having sun and pinion gears of the spur gear type with the pinion gears having various forms of hub means wherein the hub means cooperate with the pinion gears, the sun gears and the housing to properly position all of the elements to provide effective differential action and to produce sufficient friction or reactive forces between the elements to provide limited slip action.
Inventors
- 👤 R Belansky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:52
CPC Classifications
F; F16; F16H; F16H48/00; F16H48/06; F16H48/10; F16H48/11; F16H2048/106
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
170 words
A limited slip differential mechamism including rotatable housing means, a pair of sun gears rotatably mounted in said housing means, each of said gears adapted to be drivingly coupled with shaft means, a group of first pinion gears in said housing meshing with one of said sun gears, a group of second pinion gears in said housing meshing with the other of said pair of sun gears, each of the pinion gears of one group having limited meshing engagement with two pinion gears of the other group, and hub sections etending axially from one extremity of each pinion gear and providing peripheral gear teeth engaging surfacEs, said peripheral surfaces being so disposed that the extremities of the gear teeth of one group of pinion gears contact the peripheral surfaces of the hub sections of the other group of pinion gears, and the extremities of the teeth of one of the sun gears contact the peripheral surfaces of the hub sections of the pinion gears meshing with the other sun gear.
Claim 2
Dependent Claim
170 words
A limited slip differential mechamism including rotatable housing means, a pair of sun gears rotatably mounted in said housing means, each of said gears adapted to be drivingly coupled with shaft means, a group of first pinion gears in said housing meshing with one of said sun gears, a group of second pinion gears in said housing meshing with the other of said pair of sun gears, each of the pinion gears of one group having limited meshing engagement with two pinion gears of the other group, and hub sections etending axially from one extremity of each pinion gear and providing peripheral gear teeth engaging surfacEs, said peripheral surfaces being so disposed that the extremities of the gear teeth of one group of pinion gears contact the peripheral surfaces of the hub sections of the other group of pinion gears, and the extremities of the teeth of one of the sun gears contact the peripheral surfaces of the hub sections of the pinion gears meshing with the other sun gear.
Claim 3
Dependent Claim
22 words
A limited slip differential mechanism as set forth in claim 1, wherein the hub sections are formed integral with complementary pinion gears.
Claim 4
Dependent Claim
28 words
A limited slip differential mechanism as set forth in claim 1, wherein the diameter of each hub section approximates the root diameter of the pinion gear associated therewith.
Claim 5
Dependent Claim
37 words
A limited slip differential mechanism as set forth in claim 1, wherein the pinion gears and associated hub sections are formed to have clearance within restricted limits with respect to the inner surfaces of the end plates.
Claim 6
Dependent Claim
28 words
A limited slip differential mechanism as set forth in claim 1, wherein the pinion gears and associated hub sections are formed to have lateral clearance within restricted limits.
Claim 7
Dependent Claim
55 words
A limited slip differential mechanism as set forth in claim 1, wherein the end surfaces of each group of pinion gears are engageable with the inner surface of one of said end plates and the end surfaces of the hub sections in said group are engageable with the inner surface of the other end plate.
Claim 8
Dependent Claim
36 words
A limited slip differential mechanism as set forth in claim 1, wherein the inner surface of each end plate is coincident with a plane which is normal to the axes of the pinion and sun gears.
Claim 9
Dependent Claim
22 words
A limited slip differential mechanism as set forth in claim 1, wherein hub sections extend from opposite sides of each pinion gear.
Claim 10
Dependent Claim
23 words
A limited slip differential mechanism as set forth in claim 8, wherein said end plates rotatably support the extremities of said hub sections.
References Cited (Backward Citations)
US1203085A
Cited
US1229548A
Cited
US1454578A
Cited
US2786366A
Cited
US3060765A
Cited
US3406593A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |