Patent US4449727A successfully refreshed from Google Patents.
US4449727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Skid control car
Assignee: Individual
•
Filing: 1982-08-30
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Granted: 1984-05-22
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Expires: 2002-08-30
Abstract
Abstract An automotive vehicle having a front wheel drive is provided with pivotable rear wheels having positive casters up to about ten degrees to facilitate training race car drivers in skid control.
Inventors
- 👤 Bertil Roos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:40
CPC Classifications
G; G09; G09B; G09B19/00; G09B19/16; G09B19/167
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
89 words
An automotive vehicle for training drivers in skid control wherein said vehicle has a set of front wheels, said front wheels being steerable, said rear wheels being pivotable and having a positive caster, said caster causing said rear wheels to steer away from the direction of a turn executed by the driver of the vehicle, said rear wheels being connected together by a transverse rod for causing the wheels to turn by the same amount, and wheel bias means to bias said rear wheels to a normally straight position.
Claim 2
Dependent Claim
89 words
An automotive vehicle for training drivers in skid control wherein said vehicle has a set of front wheels, said front wheels being steerable, said rear wheels being pivotable and having a positive caster, said caster causing said rear wheels to steer away from the direction of a turn executed by the driver of the vehicle, said rear wheels being connected together by a transverse rod for causing the wheels to turn by the same amount, and wheel bias means to bias said rear wheels to a normally straight position.
Claim 3
Dependent Claim
13 words
A vehicle in accordance with claim 1 wherein said caster is 5-10 degrees.
Claim 4
Dependent Claim
51 words
A vehicle in accordance with claim 2 wherein said vehicle includes a rear axle, said rear wheels being connected to the rear axle by discrete links which are pivoted on the axle, said pivot axis being inclined at an angle of about 5 to 10 degrees with respect to the vertical.
Claim 5
Dependent Claim
41 words
A vehicle in accordance with claim 3 including a discrete wheel bias mechanism associated with each of the rear wheels, each wheel bias mechanism being supported by the rear axle and being pivotably connected to one end of its associated link.
Claim 6
Dependent Claim
23 words
A vehicle in accordance with claim 4 wherein each wheel bias mechanism is on an opposite side of the axle from said rod.
Claim 7
Dependent Claim
24 words
A vehicle in accordance with claim 4 wherein each wheel bias mechanism is connected to one end of its associated link by said rod.
Claim 8
Dependent Claim
24 words
A vehicle in accordance with claim 4 wherein each wheel bias mechanism includes a spring biasing its associated rear wheel to a straight position.
Claim 9
Dependent Claim
78 words
In an automotive front wheel drive vehicle for training drivers in skid control comprising a frame supporting a rear axle, a set of pivotable rear wheels rotatably supported by said axle, a transverse rod having its ends coupled to said rear wheels for causing the wheels to turn by the same amount, and said rear wheels having a positive caster causing them to steer away from the direction of the turn executed by the driver of the vehicle.
Claim 10
Dependent Claim
78 words
In an automotive front wheel drive vehicle for training drivers in skid control comprising a frame supporting a rear axle, a set of pivotable rear wheels rotatably supported by said axle, a transverse rod having its ends coupled to said rear wheels for causing the wheels to turn by the same amount, and said rear wheels having a positive caster causing them to steer away from the direction of the turn executed by the driver of the vehicle.
Claim 11
Dependent Claim
46 words
In a vehicle in accordance with claim 8 wherein said rear wheels are connected to the rear axle by discrete links which are pivoted on the axle, the pivot axis being inclined at an angle of about 5 to 10 degrees with respect to the vertical.
Claim 12
Dependent Claim
44 words
In a vehicle in accordance with claim 8 including a discrete wheel bias mechanism associated with each of the rear wheels, each wheel bias mechanism being supported by the rear axle and including a spring biasing its associated rear wheel to a straight position.
Claim 13
Dependent Claim
27 words
A vehicle in accordance with claim 4 wherein the end of each wheel bias mechanism remote from its associated link is pivotably supported by the rear axle.
Claim 14
Dependent Claim
16 words
A vehicle in accordance with claim 4 wherein each wheel bias mechanism includes a shock absorber.
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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) | 1987-05-22 | 1987-11-21 | 1988-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-22 | 1991-11-21 | 1992-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-22 | 1995-11-21 | 1996-05-22 | $7700.00 | Window Closed / Lapsed |