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US4337840A Expired / Lapsed US ⏱️ 0.0 years remaining

Driving device for automobiles, in particular all-terrain vehicles

Assignee: Volkswagen AG
•
Filing: 1980-07-08
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Granted: 1982-07-06
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Expires: 2000-07-08
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Abstract

Abstract An all-wheel driving device for all-terrain vehicles employs a conventional differential for the wheels of the rear axle and separate, automatically lockable, freewheel devices for each individual front steerable wheel of the vehicle. As a result, one of the two separate differentials normally used for four-wheel drive vehicles can be eliminated.

Inventors

  • 👤 Ernst Bufler

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 03:55
CPC Classifications
B; B60; B60K; B60K17/00; B60K17/34; B60K17/348; B60K17/35; B60K17/3505; B60K17/36

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 228 words
In a driving device for automobiles, for example all-terrain vehicles, wherein the driving engine can simultaneously drive several vehicle axles by way of a transfer case having an input shaft connected to said driving engine and two output shafts, a constant drive is applied to at least one vehicle axle via one of said output shafts and a differential gear, and a drive for at least one additional vehicle axle is directly provided from the other output shaft via at least one freewheel device that is automatically locking and without a differential gear, the improvement characterized in that: the two output shafts of said transfer case are constantly engaged with said input shaft; said at least one freewheel device comprises separate, automatically lockable freewheel devices associated with each individual wheel on the axle driven thereby, which individual freewheel devices are effective during both forward and reverse travel; and the transmission ratio in the axle drive of the vehicle axle driven by way of the freewheel devices is designed sufficiently larger than the ratio in the axle drive of the constantly driven vehicle axle that at no time during cornering, within the entire possible steering lock range of the steerable vehicle wheels, does there occur a strain due to the relative drives to the constantly driven vehicle axle and the vehicle axle driven by way of the freewheel devices.
Claim 2
Dependent Claim 228 words
In a driving device for automobiles, for example all-terrain vehicles, wherein the driving engine can simultaneously drive several vehicle axles by way of a transfer case having an input shaft connected to said driving engine and two output shafts, a constant drive is applied to at least one vehicle axle via one of said output shafts and a differential gear, and a drive for at least one additional vehicle axle is directly provided from the other output shaft via at least one freewheel device that is automatically locking and without a differential gear, the improvement characterized in that: the two output shafts of said transfer case are constantly engaged with said input shaft; said at least one freewheel device comprises separate, automatically lockable freewheel devices associated with each individual wheel on the axle driven thereby, which individual freewheel devices are effective during both forward and reverse travel; and the transmission ratio in the axle drive of the vehicle axle driven by way of the freewheel devices is designed sufficiently larger than the ratio in the axle drive of the constantly driven vehicle axle that at no time during cornering, within the entire possible steering lock range of the steerable vehicle wheels, does there occur a strain due to the relative drives to the constantly driven vehicle axle and the vehicle axle driven by way of the freewheel devices.
Claim 3
Dependent Claim 37 words
A driving device as claimed in claim 1, characterized in that the transmission ratio of the vehicle axle drivable over the freewheel devices is larger by at least 4% than that of the constantly driven vehicle axle.
Claim 4
Dependent Claim 19 words
A driving device as claimed in claim 1 characterized in that the differential is provided with a differential lock.
Claim 5
Dependent Claim 37 words
A driving device is claimed in claims 1, 2, or 3 characterized in that two freewheel devices are associated with two front steerable wheels of a vehicle and the differential is associated with two rear nonsteerable wheels.

References Cited (Backward Citations)

US1524875A Cited
DE2413288A1 Cited
DE2835865A1 Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1985-07-05 1986-01-04 1986-07-06 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1989-07-05 1990-01-04 1990-07-06 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1993-07-05 1994-01-04 1994-07-06 $7700.00 Window Closed / Lapsed

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