Patent US3620392A successfully refreshed from Google Patents.
US3620392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mine cars
Assignee: ROBERT HUDSON Ltd
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Filing: 1969-10-20
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Granted: 1971-11-16
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Expires: 1989-10-20
Abstract
Abstract A mine car of a generally rectangular form of which the bottom can swing open to enable the car to discharge its contents. The wheels of the mine car are attached to the swingable bottom and the rear wheel assembly has an axle arrangement such that the rear wheels can straddle a guide rail which serves to maintain the open bottom in the desired position.
Inventors
- 👤 Fred Greenwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:47
CPC Classifications
B; B65; B65G; B65G47/00; B65G47/74; B65G47/78; B61; B61D; B61D7/00; B61D7/14; B61D7/16; B61D7/24; B61D7/30
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
172 words
In a rail car for use in mines which comprises a generally rectangular receptacle having a bottom panel hinged at one end thereof which swings downwardly to discharge the contents as the car passes over an excavated discharge station, said bottom panel carrying a rolling guide element adapted for rolling on a guide track which spans said discharge station so that said bottom panel swings to open and close the car as the car passes over the discharge station, said bottom panel further having an axle assembly at each end thereof, each axle assembly comprising an axle extending transversely of the car with a rail wheel at each end thereof, the improvement comprising cranking means for upwardly cranking the axle of the axle assembly at the free end of the bottom panel between the rail wheels so that the rail wheels straddle the guide track to the extent that the guide track intersects the rotary axis of the rail wheels whereby a saving is effect in excavation to provide the discharge station.
Claim 2
Dependent Claim
172 words
In a rail car for use in mines which comprises a generally rectangular receptacle having a bottom panel hinged at one end thereof which swings downwardly to discharge the contents as the car passes over an excavated discharge station, said bottom panel carrying a rolling guide element adapted for rolling on a guide track which spans said discharge station so that said bottom panel swings to open and close the car as the car passes over the discharge station, said bottom panel further having an axle assembly at each end thereof, each axle assembly comprising an axle extending transversely of the car with a rail wheel at each end thereof, the improvement comprising cranking means for upwardly cranking the axle of the axle assembly at the free end of the bottom panel between the rail wheels so that the rail wheels straddle the guide track to the extent that the guide track intersects the rotary axis of the rail wheels whereby a saving is effect in excavation to provide the discharge station.
Claim 3
Dependent Claim
37 words
In a rail car in accordance with claim 1, additional cranking means operatively connected to the axle of the axle assembly at the other end of said bottom panel in a manner similar to the free end.
Claim 4
Dependent Claim
253 words
In a rail car for use in mines which comprises a generally rectangular receptacle having a bottom panel hinged at one end thereof which swings downwardly to discharge the contents of the car as the car passes over an excavated discharge station, said bottom panel carrying a rolling guide element adapted for rolling on a guide track which spans said discharge station so that the bottom panel swings to open and close as the car passes over the discharge station, said bottom panel further having an axle assembly at each end thereof, each axle assembly comprising an axle extending transversely of the car and having a rail wheel at each end thereof; the improvement comprising a hooking and holding catch and release lever independently pivotally connected to the receptacle at the end adjacent the free end of the bottom panel, and a member at the free end of the bottom panel around which the said catch hooks to hold the bottom panel in the closed position, said release lever being adapted to engage a cam track operatively positioned in relation to the discharge station such that the release lever swings and moves the catch to release the bottom panel when the car travels in one direction, but when the car travels in the opposite direction and the release arm engages the cam track, it swings in the opposite direction without engaging and releasing the catch, saId catch being spring loaded to the position in which it engages the member on the bottom panel.
Claim 5
Dependent Claim
253 words
In a rail car for use in mines which comprises a generally rectangular receptacle having a bottom panel hinged at one end thereof which swings downwardly to discharge the contents of the car as the car passes over an excavated discharge station, said bottom panel carrying a rolling guide element adapted for rolling on a guide track which spans said discharge station so that the bottom panel swings to open and close as the car passes over the discharge station, said bottom panel further having an axle assembly at each end thereof, each axle assembly comprising an axle extending transversely of the car and having a rail wheel at each end thereof; the improvement comprising a hooking and holding catch and release lever independently pivotally connected to the receptacle at the end adjacent the free end of the bottom panel, and a member at the free end of the bottom panel around which the said catch hooks to hold the bottom panel in the closed position, said release lever being adapted to engage a cam track operatively positioned in relation to the discharge station such that the release lever swings and moves the catch to release the bottom panel when the car travels in one direction, but when the car travels in the opposite direction and the release arm engages the cam track, it swings in the opposite direction without engaging and releasing the catch, saId catch being spring loaded to the position in which it engages the member on the bottom panel.
References Cited (Backward Citations)
US990380A
Cited
US2675135A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |