US4729259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interaxle differential system for connecting two driven axles of a motor vehicle
Assignee: Steyr Daimler Puch AG
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Filing: 1987-02-09
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Granted: 1988-03-08
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Expires: 2007-02-09
Abstract
Abstract An interaxle differential system connecting two driven axles of a motor vehicle comprises a restrainable differential and a planetary gear train, which comprises three torque-transmitting members which have parallel axes. Two of said torque-transmitting members are operatively connected to two output shafts of the differential. A restraining device is connected to the third of said torque-transmitting members. In an interaxle differential system for use in a passenger car, the restraining device is a controllable liquid friction coupling, one coupling half of which is held against rotation.
Inventors
- 👤 Heribert Lanzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:19
CPC Classifications
F; F16; F16H; F16H48/00; F16H48/05; B; B60; B60K; B60K17/00; B60K17/34; B60K17/344; B60K17/346; B60K17/3462; B60K17/3465; F16H48/06; F16H48/08; F16H48/10; F16H48/20; F16H48/26; F16H48/30; F16H2048/204
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
84 words
A drive system for a motor vehicle having two driven axles, comprising an interaxle differential having two output shafts, said output shafts respectively operatively connected to said driven axles, a planetary gear train comprising first, second, and third torque-transmitting members having parallel axes, said first and second torque-transmitting members being respectively operatively connected to said output shafts, and a liquid friction coupling having a first coupling half operatively connected to said third torque-transmitting member, and a second coupling half which is held against rotation.
Claim 2
Dependent Claim
84 words
A drive system for a motor vehicle having two driven axles, comprising an interaxle differential having two output shafts, said output shafts respectively operatively connected to said driven axles, a planetary gear train comprising first, second, and third torque-transmitting members having parallel axes, said first and second torque-transmitting members being respectively operatively connected to said output shafts, and a liquid friction coupling having a first coupling half operatively connected to said third torque-transmitting member, and a second coupling half which is held against rotation.
Claim 3
Dependent Claim
13 words
The drive system of claim 1, wherein said liquid friction coupling is controllable.
Claim 4
Dependent Claim
31 words
The drive system of claim 1, wherein one of said first and second torque-transmitting members is non-rotably connected to a shaft, which is operatively connected to the other of said axles.
Claim 5
Dependent Claim
15 words
The drive system of claim 1, wherein said liquid friction coupling comprises a fluid-operable brake.
Claim 6
Dependent Claim
14 words
The drive system of claim 4, wherein said brake comprises a multiple disc brake.
Claim 7
Dependent Claim
90 words
An interaxle differential for a motor vehicle having two driven axles, comprising two output shafts respectively operatively connected to said driven axles, a planetary gear train comprising first, second, and third torque-transmitting members having parallel axes, said first and second torque-transmitting members being respectively operatively connected to said output shafts, and a liquid friction coupling which transmits torque by means of viscous shear forces, said liquid friction coupling having a first coupling half operatively connected to said third torque-transmitting member, and a second coupling half which is held against rotation.
Claim 8
Dependent Claim
90 words
An interaxle differential for a motor vehicle having two driven axles, comprising two output shafts respectively operatively connected to said driven axles, a planetary gear train comprising first, second, and third torque-transmitting members having parallel axes, said first and second torque-transmitting members being respectively operatively connected to said output shafts, and a liquid friction coupling which transmits torque by means of viscous shear forces, said liquid friction coupling having a first coupling half operatively connected to said third torque-transmitting member, and a second coupling half which is held against rotation.
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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) | 1991-03-08 | 1991-09-07 | 1992-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-08 | 1995-09-07 | 1996-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-08 | 1999-09-07 | 2000-03-08 | $7700.00 | Window Closed / Lapsed |