Patent US3901419A successfully refreshed from Google Patents.
US3901419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow promoting device for batch hoppers
Assignee: Bethlehem Steel Corp
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Filing: 1974-06-03
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Granted: 1975-08-26
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Expires: 1994-06-03
Abstract
Abstract An apparatus for minimizing arching of granular material within a gravity operated, batch-type hopper. A plate rotatable about a horizontal shaft is mounted within the hopper above a bottom discharge opening. Prior to charging, the plate is rotated to a horizontally extending position and during discharging to a vertically extending position. The plate is power actuated to cause rotation in a predetermined time interval after the opening of the hopper.
Inventors
- 👤 Imre Szendroi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:07
CPC Classifications
C; C10; C10B; C10B31/00; C10B31/02; C10B31/04; B; B65; B65D; B65D88/00; B65D88/54; B65D88/64; B65D90/00; B65D90/54; B65D90/62; B65D90/623
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
130 words
In combination with a hopper adapted to receive through a top charging opening batch quantities of granular material and to discharge said material through a bottom discharge opening, the improvement comprising: a. gate means associated with said bottom discharge opening and adapted to be closed when said hopper is being charged and opened when said hopper is being discharged, b. a plate mounted on a rotatable shaft and locked in a horizontally extending position within said hopper above said bottom discharge opening to absorb the impact of said material during charging to provide unconsolidated material below said plate; and c. rotating means for rotating said plate from a horizontally extending charging position to a vertically extending discharging position in a predetermined time interval after the opening of said gate means.
Claim 2
Dependent Claim
130 words
In combination with a hopper adapted to receive through a top charging opening batch quantities of granular material and to discharge said material through a bottom discharge opening, the improvement comprising: a. gate means associated with said bottom discharge opening and adapted to be closed when said hopper is being charged and opened when said hopper is being discharged, b. a plate mounted on a rotatable shaft and locked in a horizontally extending position within said hopper above said bottom discharge opening to absorb the impact of said material during charging to provide unconsolidated material below said plate; and c. rotating means for rotating said plate from a horizontally extending charging position to a vertically extending discharging position in a predetermined time interval after the opening of said gate means.
Claim 3
Dependent Claim
25 words
Apparatus according to claim 1 in which said plate in a horizontally extending position intersects and substantially overlaps a vertical projection of said discharge opening.
Claim 4
Dependent Claim
31 words
Apparatus according to claim 2 in which said rotating means rotates said plate from a horizontally extending to a vertically extending position substantially simultaneously with the discharge of said unconsolidated material.
Claim 5
Dependent Claim
44 words
Apparatus according to claim 3 in which said hopper comprises opposite wall portions and in which said shaft is located at an elevation wherein the minimum horizontal dimension between said wall portions is not less than the critical arching dimension of said granular material.
Claim 6
Dependent Claim
52 words
Apparatus according to claim 4 in which said rotating means includes: a. power actuated moving means connected to said rotatable shaft for rotating said plate between a horizontally extending position and a vertically extending position; and b. control means for actuating said power actuated moving means after said gate means is opened.
Claim 7
Dependent Claim
65 words
Apparatus according to claim 5 in which said power actuated moving means includes: a. a hydraulic cylinder pivotably mounted on said hopper; b. a piston rod movable within said hydraulic cylinder; and c. means for connecting said rotatable shaft to said piston rod to rotate said plate between a horizontally extending position and a vertically extending position when said piston rod is extended and retracted.
Claim 8
Dependent Claim
14 words
The invention of claim 1 in which said time interval is approximately 6 seconds.
References Cited (Backward Citations)
US3650436A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |