Patent US4879023A successfully refreshed from Google Patents.
US4879023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conveyor assembly
Assignee: Powerscreen International Ltd
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Filing: 1988-09-16
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Granted: 1989-11-07
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Expires: 2008-09-16
Abstract
Abstract A conveyor assembly comprising a main inclined conveyor with a screen box located at a discharge or off-loading end thereof, the main conveyor and screen box being located on an elongate structure including length adjustable legs intermediate its ends mounted on wheels. The loading end of the screen box is pivoted on an axis transversely of and at the discharge end of the structure with the screen box extending towards the loading end of the structure, the discharge end of the screen box being connected to the structure by length-adjustable legs thereby to alter the inclination of the box. A cradle is suspended below the structure to carry one or more boom conveyors the or each to receive a grade of material, the cradle being horizontally oriented and connected by linkage with the structure and the box whereby pivotal movement of the box causes synchronous movement of the cradle such as to maintain a horizontal orientation of the cradle.
Inventors
- 👤 Michael L. Mallaghan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:02
CPC Classifications
B; B07; B07B; B07B13/00; B07B13/14; B07B13/16; B07B1/00; B07B1/005
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
211 words
A conveyor assembly comprising a main inclined conveyor having a loading end and a discharge end with a screen box having a loading end and a discharge end located at the discharge end of the conveyor, said main conveyor and screen box being located on an elongated structure having a loading end and a discharge end including length adjustable legs intermediate its ends mounted on wheels, in which the loading end of the screen box is pivoted about an axis traversely of and at the discharge end of the structure with the discharge end of the screen box extending towards the loading end of the structure, the discharge end of the screen box being connected to said structure by length adjustable means thereby to alter the inclination of said box, and a cradle is suspended below said structure to carry at least one boom conveyor to receive a grade of material, said cradle being horizontally oriented and connected by linkage with said structure and said box whereby pivotal movement of said box causes synchronous movement of the cradle such as to maintain a horizontal orientation of said cradle, and wherein said at least one boom conveyor comprises two lateral boom conveyors mounted on said cradle to extend in opposite directions therefrom.
Claim 2
Dependent Claim
211 words
A conveyor assembly comprising a main inclined conveyor having a loading end and a discharge end with a screen box having a loading end and a discharge end located at the discharge end of the conveyor, said main conveyor and screen box being located on an elongated structure having a loading end and a discharge end including length adjustable legs intermediate its ends mounted on wheels, in which the loading end of the screen box is pivoted about an axis traversely of and at the discharge end of the structure with the discharge end of the screen box extending towards the loading end of the structure, the discharge end of the screen box being connected to said structure by length adjustable means thereby to alter the inclination of said box, and a cradle is suspended below said structure to carry at least one boom conveyor to receive a grade of material, said cradle being horizontally oriented and connected by linkage with said structure and said box whereby pivotal movement of said box causes synchronous movement of the cradle such as to maintain a horizontal orientation of said cradle, and wherein said at least one boom conveyor comprises two lateral boom conveyors mounted on said cradle to extend in opposite directions therefrom.
Claim 3
Dependent Claim
228 words
A conveyor assembly comprising a main inclined conveyor having a loading end and a discharge end with a screen box having a load end and a discharge end located at the discharge end of the conveyor, said main conveyor and screen box located on an elongated structure having a loading end and a discharge end including length adjustable legs intermediate its ends mounted on wheels, in which the loading end of the screen box is pivoted about an axis traversely of and at the discharge end of the structure with the discharge end of the screen box extending towards the loading end of the structure, the discharge end of the screen box being connected to said structure by length adjustable means thereby to alter the inclination of said box, and a cradle is suspended below said structure to carry at least one boom conveyor to receive a grade of material, said cradle being horizontally oriented and connected by linkage with said structure and said box whereby pivotal movement of said box causes synchronous movement of the cradle such as to maintain a horizontal orientation of said cradle, and wherein said at least one boom conveyor comprises two lateral boom conveyors mounted on said cradle to extend in opposite directions therefrom and a third boom conveyor extending from said cradle to beyond the discharge end of the main conveyor.
Claim 4
Dependent Claim
228 words
A conveyor assembly comprising a main inclined conveyor having a loading end and a discharge end with a screen box having a load end and a discharge end located at the discharge end of the conveyor, said main conveyor and screen box located on an elongated structure having a loading end and a discharge end including length adjustable legs intermediate its ends mounted on wheels, in which the loading end of the screen box is pivoted about an axis traversely of and at the discharge end of the structure with the discharge end of the screen box extending towards the loading end of the structure, the discharge end of the screen box being connected to said structure by length adjustable means thereby to alter the inclination of said box, and a cradle is suspended below said structure to carry at least one boom conveyor to receive a grade of material, said cradle being horizontally oriented and connected by linkage with said structure and said box whereby pivotal movement of said box causes synchronous movement of the cradle such as to maintain a horizontal orientation of said cradle, and wherein said at least one boom conveyor comprises two lateral boom conveyors mounted on said cradle to extend in opposite directions therefrom and a third boom conveyor extending from said cradle to beyond the discharge end of the main conveyor.
Claim 5
Dependent Claim
252 words
A conveyor assembly comprising a main inclined conveyor having a loading end and a discharge end with a screen box having a loading end and a discharge end located at the discharge end of the conveyor, said main conveyor and screen box being located on an elongated structure having a loading end and a discharge end including length adjustable legs intermediate its ends mounted on wheels, in which the loading end of the screen box is pivoted about an axis traversely of and at the discharge end of the structure with the discharge end of the screen box extending towards the loading end of the structure, the discharge end of the screen box being connected to said structure by length adjustable means thereby to alter the inclination of said box, and a cradle is suspended below said structure to carry at least one boom conveyor to receive a grade of material, said cradle being horizontally oriented and connected by linkage with said structure and said box whereby pivotal movement of said box causes synchronous movement of the cradle such as to maintain a horizontal orientation of said cradle, and wherein said at least one boom conveyor comprises two lateral boom conveyors mounted on said cradle to extend in opposite directions therefrom and a third boom conveyor extending from said cradle to beyond the discharge end of the main conveyor and including separate funnel means arranged to receive and direct each grade of material to a loading end of a respective boom conveyor.
Claim 6
Dependent Claim
252 words
A conveyor assembly comprising a main inclined conveyor having a loading end and a discharge end with a screen box having a loading end and a discharge end located at the discharge end of the conveyor, said main conveyor and screen box being located on an elongated structure having a loading end and a discharge end including length adjustable legs intermediate its ends mounted on wheels, in which the loading end of the screen box is pivoted about an axis traversely of and at the discharge end of the structure with the discharge end of the screen box extending towards the loading end of the structure, the discharge end of the screen box being connected to said structure by length adjustable means thereby to alter the inclination of said box, and a cradle is suspended below said structure to carry at least one boom conveyor to receive a grade of material, said cradle being horizontally oriented and connected by linkage with said structure and said box whereby pivotal movement of said box causes synchronous movement of the cradle such as to maintain a horizontal orientation of said cradle, and wherein said at least one boom conveyor comprises two lateral boom conveyors mounted on said cradle to extend in opposite directions therefrom and a third boom conveyor extending from said cradle to beyond the discharge end of the main conveyor and including separate funnel means arranged to receive and direct each grade of material to a loading end of a respective boom conveyor.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-06 | 1993-05-08 | 1993-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-06 | 1997-05-08 | 1997-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-06 | 2001-05-08 | 2001-11-07 | $7700.00 | Window Closed / Lapsed |