US3716093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wheels for rolling stock
Assignee: Individual
•
Filing: 1970-04-22
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Granted: 1973-02-13
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Expires: 1990-04-22
Abstract
Abstract A wheel for rolling stock such as a tractor which comprises a wheel rim carrying a pneumatic tire having an annular tire cavity and a plurality of substantially spherical balls having a relatively high density, a packed layer of the ball partly filling the tire cavity. When the axis of the wheel is positioned horizontally, the wheel can have a gravity center at a lower point than the axis thereof due to the presence of the heavy balls positioned at the bottom portion of the tire cavity.
Inventors
- 👤 S Tsuchiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:00
CPC Classifications
B; B60; B60C; B60C5/00; B60C5/004; B60C5/005; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A land vehicle having a plurality of wheels, each wheel comprising a wheel rim, and an inflated pneumatic tire attached to said rim and having an annular air cavity of generally circular cross section therein, the radius of said rim being approximately one-half of the radius of said tire, a plurality of dense solid spherical balls within said cavity and occupying substantially one-half of the vertical depth of said cavity cross-section in the lower ground-engaging portion of said tire only, said balls being made of a metal selected from the group consisting of steel, lead, and lead-containing alloys and of a diameter of between 5 mm and 50 mm, said balls being free to roll and move in said cavity and to occupy only the lowest portion thereof, thereby increasing ground pressure of the tire and lowering the center of gravity of said vehicle.
Claim 2
Dependent Claim
144 words
A land vehicle having a plurality of wheels, each wheel comprising a wheel rim, and an inflated pneumatic tire attached to said rim and having an annular air cavity of generally circular cross section therein, the radius of said rim being approximately one-half of the radius of said tire, a plurality of dense solid spherical balls within said cavity and occupying substantially one-half of the vertical depth of said cavity cross-section in the lower ground-engaging portion of said tire only, said balls being made of a metal selected from the group consisting of steel, lead, and lead-containing alloys and of a diameter of between 5 mm and 50 mm, said balls being free to roll and move in said cavity and to occupy only the lowest portion thereof, thereby increasing ground pressure of the tire and lowering the center of gravity of said vehicle.
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) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |