US3756369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for stacking and reclaiming bulk material
Assignee: McDowell-Wellman Engineering Co
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Filing: 1971-10-21
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Granted: 1973-09-04
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Expires: 1991-10-21
Abstract
Abstract There is provided an apparatus useful for handling bulk material and characterized by a four-link boom movable in a vertical plane and constructed and adapted both to reclaim and to stack bulk material. It also includes an endless conveyor belt having outwardly projecting flights secured thereto at spaced intervals for continuous coursing along the outer periphery defined by the four links.
Inventors
- 👤 R Hulette
- 👤 R Stupp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:50
CPC Classifications
B; B65; B65G; B65G65/00; B65G65/02; B65G65/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
165 words
A stacker-reclaimer apparatus comprising in combination: a. a frame, b. a four-link boom having upper and lower reaches and having a first link normally stationarily mounted in the frame and having consecutively pivotally joined second, third and fourth links movable in a vertical plane relative to the frame, the free ends of the second and fourth links being pivotally joined to the first link, c. means for producing rotation in said plane of one link relative to its adjacent link, including a fifth link secured adjacent a pivot joining any two of said first link, second link, third link or fourth link and extending to and movable along and in contact with an opposite link, and means coacting therewith to change the distance between the opposite link and the pivot, and d. endless belt means including a plurality of upstanding outwardly projecting flights sPaced therealong mounted on said boom for continuous coursing along the outer periphery defined by said first, second, third and fourth links.
Claim 2
Dependent Claim
18 words
A stacker-reclaimer in accordance with claim 1 wherein the first link is stationarily mounted relative to said frame.
Claim 3
Dependent Claim
20 words
A stacker-reclaimer in accordance with claim 1 wherein the frame is mounted on wheeled trucks for movement on a trackway.
Claim 4
Dependent Claim
12 words
A stacker-reclaimer in accordance with claim 3 wherein the trackway is linear.
Claim 5
Dependent Claim
12 words
A stacker-reclaimer in accordance with claim 3 wherein the trackway is circular.
Claim 6
Dependent Claim
22 words
A stacker-reclaimer in accordance with claim 1 in which the distance-changing means includes a ball screw jack coacting with the fifth link.
Claim 7
Dependent Claim
29 words
A stacker-reclaimer in accordance with claim 6 in which the ball screw jack is secured to the opposite link and coacts with the free end of the fifth link.
Claim 8
Dependent Claim
64 words
A stacker-reclaimer in accordance with claim 1 in which the fifth link is pivotally secured at one end on the same axis as said pivot and is provided with a roller at its free end, and the opposite link includes an elongated guideway extending therealong for guiding the free end of said fifth link as it moves in response to said ball screw jack.
Claim 9
Dependent Claim
26 words
A stacker-reclaimer in accordance with claim 1 additionally including conveyor means for feeding bulk material to be stacked to an upper reach of said endless belt.
Claim 10
Dependent Claim
52 words
A stacker-reclaimer in accordance with claim 1 additionally including a return chute coacting between the first link and a lower reach of said endless belt, said return including a discharge chute, and a reclaimed material conveyor for conveying reclaimed material away from said stacker-reclaimer disposed in material-receiving relation to said discharge chute.
Claim 11
Dependent Claim
28 words
A stacker-reclaimer in accordance with claim 1 in which the fourth link is adapted to be moved in said vertical plane for reclaiming bulk material from a pile.
Claim 12
Dependent Claim
38 words
A stacker-reclaimer in accordance with claim 11 in which the lower side of said fourth link includes means coacting between said fourth link and said endless belt means for stabilizing said endless belt means against lateral thrust forces.
Claim 13
Dependent Claim
35 words
A stacker-reclaimer in accordance with claim 1 in which the endless belt means includes a wire cable reinforced rubber belt and clamping means coacting between the belt and the flights for anchoring the latter thereto.
Claim 14
Dependent Claim
24 words
A stacker-reclaimer in accordance with claim 1 in which the endless belt means includes troughing rollers disposed along the upper reach of said boom.
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |