Patent US2663215A successfully refreshed from Google Patents.
US3684044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quadrilateral vehicle
Assignee: Individual
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Filing: 1970-04-27
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Granted: 1972-08-15
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Expires: 1990-04-27
Abstract
Abstract In a vehicle having a single front and rear mounted driven and steerable wheel or track, 360* steering is possible by applying drive about its steering axes. The torque developed by this drive is balanced out in the steering system, hence preventing the vehicle from being difficult to steer in one direction and easy in the other direction. This vehicle is capable of turning about its own center and requires no differential. The system is particularly adaptable to a small snowmobile and will greatly enhance its steering, traction and braking characteristics. Two centrally mounted skis are placed on the vehicle in a quadrilateral fashion to provide lateral stability.
Inventors
- 👤 Thomas A Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:21
CPC Classifications
B; B62; B62D; B62D61/00; B62D61/02; B62D61/04; B62D7/00; B62D7/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A vehicle comprising a frame having a first and a second track means with steering shafts steerably mounted on the frame about first and second vertical axes respectively, means connecting the two steering shafts for simultaneous steering in opposite directions, first and second vertical drive shafts coaxially mounted respectively with the two steering shafts for rotation about the steering axes and drivably connected to the track means, transmission means connecting the drive shafts for rotation in the same direction and means driving the transmission means, a first ski mounted to one side of the frame means, a second ski mounted to the other side of the frame means, said skis disposed underneath the frame means midway between the first and second track means.
Claim 2
Dependent Claim
123 words
A vehicle comprising a frame having a first and a second track means with steering shafts steerably mounted on the frame about first and second vertical axes respectively, means connecting the two steering shafts for simultaneous steering in opposite directions, first and second vertical drive shafts coaxially mounted respectively with the two steering shafts for rotation about the steering axes and drivably connected to the track means, transmission means connecting the drive shafts for rotation in the same direction and means driving the transmission means, a first ski mounted to one side of the frame means, a second ski mounted to the other side of the frame means, said skis disposed underneath the frame means midway between the first and second track means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |