US3707222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hopper with slide plates
Assignee: Hartley Controls Corp
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Filing: 1971-02-25
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Granted: 1972-12-26
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Expires: 1991-02-25
Abstract
Abstract A hopper for granular material is superposed over a belt conveyor. The hopper has side walls leading toward a discharge mouth opening onto the belt. The hopper side walls are provided with a longitudinal series of paired slidable plates extending through the side walls and toward the discharge mouth to shape the flow path of hopper contents intercepted by the plates. A preferred arrangement is to dispose the inner edges of the plates progressively closer to the centerline of the belt from the downstream to the upstream end of the hopper, whereby the flow path shaped by the plates is wider at its downstream end than its upstream end.
Inventors
- 👤 Nelson Hartley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:35
CPC Classifications
B; B65; B65G; B65G65/00; B65G2814/00; B65G2814/03; B65G2814/0301; B65G2814/0314; B65G2814/0319; B65G2814/032
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
125 words
In the combination of a belt conveyor and a super-imposed hopper for granular material, said hopper having side walls leading toward a hopper discharge mouth over said belt, the improvement in which said hopper is provided with a longitudinal series of slidable plates disposed at the same angle of inclination and extending through said side walls and over said discharge mouth to shape the flow path of hopper contents intercepted by the plates, said plates extending inwardly from the side wall to progressively greater extent and being disposed with their inner edges progressively closer to the centerline of the belt from the downstream to the upstream end of the hopper whereby the flow path is wider at its downstream end than at its upstream end.
Claim 2
Dependent Claim
125 words
In the combination of a belt conveyor and a super-imposed hopper for granular material, said hopper having side walls leading toward a hopper discharge mouth over said belt, the improvement in which said hopper is provided with a longitudinal series of slidable plates disposed at the same angle of inclination and extending through said side walls and over said discharge mouth to shape the flow path of hopper contents intercepted by the plates, said plates extending inwardly from the side wall to progressively greater extent and being disposed with their inner edges progressively closer to the centerline of the belt from the downstream to the upstream end of the hopper whereby the flow path is wider at its downstream end than at its upstream end.
Claim 3
Dependent Claim
20 words
The invention of claim 1 in which said plates are disposed in matched pairs at both sides of the hopper.
Claim 4
Dependent Claim
15 words
The invention of claim 1 in which said plates are inclined downwardly toward the belt.
Claim 5
Dependent Claim
75 words
The invention of claim 1 in which said plates are arranged at both sides of the hopper in matched pairs, are inclined downwardly toward the belt and in which paired plates near the upstream end of the hopper have their inner edges closer to the centerline of the belt than the paired plates near the downstream end of the hopper, whereby the flow path is narrower at said upstream end than at said downstream end.
Claim 6
Dependent Claim
143 words
In the combination of a belt conveyor and a super-imposed hopper for granular material, said hopper being substantially rectangular in plan and having side walls leading toward a rectangular discharge mouth opening toward said belt, the improvement in which said side walls are provided with slideways, said hopper being provided with a longitudinal series of slidable plates extending through said slideways at the same angle to the vertical and projecting inwardly from said side walls over said discharge mouth to shape the flow path of hopper contents inteRcepted by the plates, said plates extending inwardly from the side walls to progressively greater extent and being disposed with their inner edges progressively closer to the centerline of the belt from the downstream to the upstream end of the hopper, whereby the flow path is wider at its downstream end than at its upstream end.
Claim 7
Dependent Claim
143 words
In the combination of a belt conveyor and a super-imposed hopper for granular material, said hopper being substantially rectangular in plan and having side walls leading toward a rectangular discharge mouth opening toward said belt, the improvement in which said side walls are provided with slideways, said hopper being provided with a longitudinal series of slidable plates extending through said slideways at the same angle to the vertical and projecting inwardly from said side walls over said discharge mouth to shape the flow path of hopper contents inteRcepted by the plates, said plates extending inwardly from the side walls to progressively greater extent and being disposed with their inner edges progressively closer to the centerline of the belt from the downstream to the upstream end of the hopper, whereby the flow path is wider at its downstream end than at its upstream end.
Claim 8
Dependent Claim
20 words
The invention of claim 5 in which said plates are arranged in matched pairs at both sides of the hopper.
References Cited (Backward Citations)
US1962017A
Cited
US3144655A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |