US3746112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Directionally stable self propelled vehicle
Assignee: JOHNSSON ERIC S
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Filing: 1971-12-02
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Granted: 1973-07-17
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Expires: 1991-12-02
Abstract
Abstract A directionally stable self propelled vehicle movable in any desired direction and equipped with at least two front and two rear rotatable driving gears having ground contact elements mounted obliquely to the axes of rotation of the driving gears. The ground contact elements being mounted so that the ground contact lines for the front set of driving gears intersect in the backward direction and that the ground contact lines for the rear set of driving gears intersect in the forward direction.
Inventors
- 👤 B Ilon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:52
CPC Classifications
B; B63; B63H; B63H1/00; B63H1/02; B63H1/12; B60; B60B; B60B19/00; B60B19/003; B60B19/12; B60B19/125; B60F; B60F3/00; B60F3/0007; B60F3/0023; B62; B62D; B62D57/00; B62D57/02; B62D57/022; B62D57/036; B62D61/00; B63H5/00; B63H5/07; B63H5/08; B63H5/125; B60B2900/00; B60B2900/10; B60B2900/131; B60B2900/30; B60B2900/351; B60Y; B60Y2200/00; B60Y2200/20; B63H2001/122
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
193 words
A directionally stable self-propelled vehicle adapted for travel in any desired direction over land or other surfaces, said vehicle comprising, in combination: a. a first pair of axles secured to the forward portion of the vehicle and extending transversely outwardly with respect to the longitudinal axis of the vehicle, b. a second pair of axles secured to the rearward portion of the vehicle and extending transversely outwardly with respect to the longitudinal axis of the vehicle, c. a pair of driving means secured to the outer ends of both the first and second pair of axles wherein each driving means is independently rotatable by its associated axle and includes: 1. a driving wheel, and 2. a plurality of bobbin-shaped rollers secured to the periphery of the driving wheel at an angular disposition with respect to the axis of rotation of the wheel such that the rolling direction surface contact lines of the rollers of the front wheels intersect at a point rearward of said first pair of axles while the rolling direction surface contact lines of the rollers of the rear wheels intersect at a point forward of said second pair of axles.
Claim 2
Dependent Claim
193 words
A directionally stable self-propelled vehicle adapted for travel in any desired direction over land or other surfaces, said vehicle comprising, in combination: a. a first pair of axles secured to the forward portion of the vehicle and extending transversely outwardly with respect to the longitudinal axis of the vehicle, b. a second pair of axles secured to the rearward portion of the vehicle and extending transversely outwardly with respect to the longitudinal axis of the vehicle, c. a pair of driving means secured to the outer ends of both the first and second pair of axles wherein each driving means is independently rotatable by its associated axle and includes: 1. a driving wheel, and 2. a plurality of bobbin-shaped rollers secured to the periphery of the driving wheel at an angular disposition with respect to the axis of rotation of the wheel such that the rolling direction surface contact lines of the rollers of the front wheels intersect at a point rearward of said first pair of axles while the rolling direction surface contact lines of the rollers of the rear wheels intersect at a point forward of said second pair of axles.
Claim 3
Dependent Claim
78 words
a plurality of bobbin-shaped rollers secured to the periphery of the driving wheel at an angular disposition with respect to the axis of rotation of the wheel such that the rolling direction surface contact lines of the rollers of the front wheels intersect at a point rearward of said first pair of axles while the rolling direction surface contact lines of the rollers of the rear wheels intersect at a point forward of said second pair of axles.
Claim 4
Dependent Claim
78 words
a plurality of bobbin-shaped rollers secured to the periphery of the driving wheel at an angular disposition with respect to the axis of rotation of the wheel such that the rolling direction surface contact lines of the rollers of the front wheels intersect at a point rearward of said first pair of axles while the rolling direction surface contact lines of the rollers of the rear wheels intersect at a point forward of said second pair of axles.
Claim 5
Dependent Claim
34 words
The vehicle of claim 1 wherein both the front and rear rolling direction surface contact lines form an angle of from 30* to 60* with respect to the axis of rotation of the wheels.
Claim 6
Dependent Claim
10 words
The vehicle of claim 2 wherein the angle is 45*.
Claim 7
Dependent Claim
29 words
The vehicle of claim 1 further including first and second motors drivingly connected to the first and second pair of axles, respectively, for independently rotating each of the axles.
Claim 8
Dependent Claim
30 words
The vehicle of claim 1 wherein the rolling direction contact lines of the rollers are each parallel to the longitudinal axes of the rollers from which each line is determined.
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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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |