US3889826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversible car plow feeder for stock pile recovery systems
Assignee: McNally Pittsburg Manufacturing Corp
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Filing: 1974-01-25
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Granted: 1975-06-17
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Expires: 1994-01-25
Abstract
Abstract This invention relates to improvements in reversible plow feeders for recovering solid materials such as ores or coal from stock piles.
Inventors
- 👤 Robert Lee Pate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:07
CPC Classifications
B; B65; B65G; B65G65/00; B65G65/30; B65G65/34; B65G65/40
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
294 words
An apparatus for moving material such as coal flowing from a stock pile as it flows onto a pair of spaced floor sections separated by an elongated delivery chute in which movement of the material from a spaced floor section to and into the delivery chute is accomplished, the apparatus comprising a. a reversible car moving back and forth in a direction substantially parallel to the axis of the elongated delivery chute, said car having a central portion which moves over the chute and corresponds in width to the chute and said car having a side portion which is positioned above and moves back and forth over a spaced floor section; b. a swingable car plow on the car; c. pivot means connected to the car and positioned to permit the car plow to swing about an axis which passes in a generally vertical plane through said side portion of the car and through the floor section; d. two material moving surfaces on the plow, one surface for causing material to move from the spaced floor section into the delivery chute when the car is moved in one linear direction and the other surface for causing material to move from the same spaced floor section when the car is moved in the other direction, said plow swingably engaged with said pivot means at one end of said plow such that the pivot engaging end portion of the plow moves ahead of the rest of the plow as the car is moved in either direction; and e. stop means to limit the swinging of the plow in each arcuate direction, said stop means being positioned to effect engagement with the plow surfaces in substantially vertical planes that pass through the side portion of the car.
Claim 2
Independent Claim
294 words
An apparatus for moving material such as coal flowing from a stock pile as it flows onto a pair of spaced floor sections separated by an elongated delivery chute in which movement of the material from a spaced floor section to and into the delivery chute is accomplished, the apparatus comprising a. a reversible car moving back and forth in a direction substantially parallel to the axis of the elongated delivery chute, said car having a central portion which moves over the chute and corresponds in width to the chute and said car having a side portion which is positioned above and moves back and forth over a spaced floor section; b. a swingable car plow on the car; c. pivot means connected to the car and positioned to permit the car plow to swing about an axis which passes in a generally vertical plane through said side portion of the car and through the floor section; d. two material moving surfaces on the plow, one surface for causing material to move from the spaced floor section into the delivery chute when the car is moved in one linear direction and the other surface for causing material to move from the same spaced floor section when the car is moved in the other direction, said plow swingably engaged with said pivot means at one end of said plow such that the pivot engaging end portion of the plow moves ahead of the rest of the plow as the car is moved in either direction; and e. stop means to limit the swinging of the plow in each arcuate direction, said stop means being positioned to effect engagement with the plow surfaces in substantially vertical planes that pass through the side portion of the car.
Claim 3
Dependent Claim
51 words
An apparatus as claimed in claim 1, wherein the plow is mounted on a vertical shaft freely rotatable relative to the car plow, said plow having a plow point extending outwardly from the pivot shaft and adapted to dig into the material flowing onto the floor section from the stock pile.
Claim 4
Dependent Claim
22 words
An apparatus as claimed in claim 2, wherein the plow point is relatively short compared to the length of the elongated portion.
Claim 5
Dependent Claim
50 words
An apparatus as claimed in claim 1, wherein the car plow includes a body having top, bottom and side steel plates, vertically spaced bearings on each side of the body in which the plow shaft is mounted, and wherein the stops are fixed to the bottom plate of the body.
Claim 6
Dependent Claim
57 words
An apparatus as claimed in claim 1, wherein a series of plows are mounted on each side of the car plow, and wherein the series of plows on one side engage one series of stops when the car plow moves in one direction and respectively engage different stops when the car plow moves in the opposite direction.
Claim 7
Dependent Claim
18 words
The apparatus of claim 5 in which the surfaces of the plow are separated by an acute angle.
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) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |