Patent US3905306A successfully refreshed from Google Patents.
US3905306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Convertible rail-highway mine car
Assignee: Standard Oil Co
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Filing: 1974-02-21
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Granted: 1975-09-16
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Expires: 1994-02-21
Abstract
Abstract A convertible rail-ground mine supply car with good ground clearance is described which operates both on rails and the mine floor surface which is equipped with rail-engaging wheels and manually operated ground-engaging wheels which are quickly and easily converted from the up or down position. The convertible rail-ground mine supply car is also equipped with a tongue which can be stored inconspicuously in the body of the car while the car is on the rails and can be extended readily upon the body of the car and adjusted for attachment to a mine tractor or the like.
Inventors
- 👤 John R Janes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:48
CPC Classifications
B; B60; B60F; B60F1/00; B60F1/04; B60F1/046; B61; B61D; B61D11/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
81 words
A convertible rail-highway mine car and the like having four rail-engaging wheels and two ground-engaging wheels, said groundengaging wheels being manually movable from an up or storage position to a down or ground-engaging position by means of a pivoting axle and rotatable lever which are torsion-spring assisted in the movement to the up position, the movement of said pivoting axle being controlled by means of a toothed ratchet gear, a latch to engage said ratchet gear and a latch release lever.
Claim 2
Dependent Claim
81 words
A convertible rail-highway mine car and the like having four rail-engaging wheels and two ground-engaging wheels, said groundengaging wheels being manually movable from an up or storage position to a down or ground-engaging position by means of a pivoting axle and rotatable lever which are torsion-spring assisted in the movement to the up position, the movement of said pivoting axle being controlled by means of a toothed ratchet gear, a latch to engage said ratchet gear and a latch release lever.
Claim 3
Dependent Claim
13 words
The car of claim 1 in which the ground-engaging wheels are rubber tired.
Claim 4
Dependent Claim
50 words
The car of claim 2 which is also equipped with a telescoping tongue which can be completely stowed in the body of the car when the rail-engaging wheels are in use and can be extended for use in pulling or pushing the car when the ground-engaging wheels are in use.
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) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |