US3794198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety door for the unloading mechanism of self-unloading wagons
Assignee: Iowa State University Research Foundation Inc
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Filing: 1972-06-12
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Granted: 1974-02-26
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Expires: 1992-06-12
Abstract
Abstract A safety door for the discharge opening of a self-unloading wagon is disclosed herein. The wagon includes a material receiving box having a first conveyor therein for conveying the material towards one end thereof. A cross conveyor is mounted at the one end of the box for conveying the material outwardly from the box through the lower end of a discharge opening formed in the side of the box. A material beater means is rotatably mounted in the box above the cross conveyor. The safety door extends across the discharge opening to prevent the operator from reaching inwardly through the discharge opening. The safety door is self-closing and is opened by the material being discharged outwardly through the discharge opening.
Inventors
- 👤 W Buchele
- 👤 L Peters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:36
CPC Classifications
B; B60; B60P; B60P1/00; B60P1/40; A; A01; A01D; A01D90/00; A01D90/10; A01D90/105
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
160 words
IN COMBINATION, A SELF-UNLOADING WAGON COMPRISING A MATERIAL RECEIVING BOX HAVING OPPOSITE ENDS AND SIDES, A FIRST CONVEYOR MEANS IN SAID BOX FOR CONVEYING MATERIAL THEREIN TOWARDS THE END THEREOF, SAID BOX HAVING A DISCHARGE OPENING FORMED THEREIN AT ONE SIDE THEREOF, ADJACENT SAID ONE END, A SECOND CONVEYOR MEANS IN SAID BOX AT SAID ONE SIDE FOR CONVEYING MATERIAL OUTWARDLY THROUGH SAID DISCHARGE OPENING, AND A NORMALLY CLOSED SAFETY DOOR MEANS COMPRISING A PAIR OF OPPOSING DOOR MEMBERS PIVOTALLY SECURED TO SAID BOX, CLOSING SAID DISCHARGE OPENING AT TIMES, SAID SAFETY DOOR MEANS BEING MOVED FROM SAID CLOSED POSITION TO AN OPEN POSITION BY THE MATERIAL BEING DISCHARGED OUTWARDLY THROUGH SUCH DISCHARGE OPENING, SAID SAFETY DOOR MEANS ADAPTED TO URGE THE SAFETY DOORS INTO A NORMALLY CLOSED POSITION INCLUDING HINGE MEMBERS SECURED THERETO AND SECURED TO SAID BOX, THE HINGE AXIS OF EACH HINGE MEMBERS ON EACH OF SAID DOORS BEING INCLINED SO THAT SAID DOOR MEMBERS ARE SELF-CLOSING.
Claim 2
Dependent Claim
160 words
IN COMBINATION, A SELF-UNLOADING WAGON COMPRISING A MATERIAL RECEIVING BOX HAVING OPPOSITE ENDS AND SIDES, A FIRST CONVEYOR MEANS IN SAID BOX FOR CONVEYING MATERIAL THEREIN TOWARDS THE END THEREOF, SAID BOX HAVING A DISCHARGE OPENING FORMED THEREIN AT ONE SIDE THEREOF, ADJACENT SAID ONE END, A SECOND CONVEYOR MEANS IN SAID BOX AT SAID ONE SIDE FOR CONVEYING MATERIAL OUTWARDLY THROUGH SAID DISCHARGE OPENING, AND A NORMALLY CLOSED SAFETY DOOR MEANS COMPRISING A PAIR OF OPPOSING DOOR MEMBERS PIVOTALLY SECURED TO SAID BOX, CLOSING SAID DISCHARGE OPENING AT TIMES, SAID SAFETY DOOR MEANS BEING MOVED FROM SAID CLOSED POSITION TO AN OPEN POSITION BY THE MATERIAL BEING DISCHARGED OUTWARDLY THROUGH SUCH DISCHARGE OPENING, SAID SAFETY DOOR MEANS ADAPTED TO URGE THE SAFETY DOORS INTO A NORMALLY CLOSED POSITION INCLUDING HINGE MEMBERS SECURED THERETO AND SECURED TO SAID BOX, THE HINGE AXIS OF EACH HINGE MEMBERS ON EACH OF SAID DOORS BEING INCLINED SO THAT SAID DOOR MEMBERS ARE SELF-CLOSING.
Claim 3
Dependent Claim
37 words
The combination of claim 1 wherein said second conveyor means comprises a cross conveyor auger extending between the sides of said box; and a material beater means rotatably mounted in said box above said cross conveyor auger.
Claim 4
Dependent Claim
25 words
The combination of claim 2 wherein said door members are hingedly secured to said box so as to urge them into said normally closed position.
Claim 5
Dependent Claim
23 words
The combination of claim 1 wherein the hinge members on each of said door members are horizontally offset with respect to each other.
Claim 6
Dependent Claim
22 words
The combination of claim 4 wherein said door members are comprised of a mesh material to permit the operator to see therethrough.
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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |