Patent US3854778A successfully refreshed from Google Patents.
US3854778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material handling plants
Assignee: TRYTHALL DESIGN AND DEV Ltd
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Filing: 1973-10-26
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Granted: 1974-12-17
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Expires: 1993-10-26
Abstract
Abstract A material handling plant for conveying powder or granular material by a compressed fluid to a selected one of a plurality of receiving points, wherein a plurality of material divertor valves are each disposed in a pipe system to control the flow of material from material conveying apparatus to a respective one of the receiving points, and wherein means is provided for automatically producing a plurality of different predetermined amounts of compressed fluid, whereby in plant use an appropriate one of said amounts can be employed to enable said apparatus to convey material to a selected one of said receiving points.
Inventors
- 👤 W Trythall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:14
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/04; B65G53/06; B65G53/10; B65G53/12
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
132 words
A material handling plant for conveying powder or granular material by a compressed fluid to a selected one of a plurality of receiving points, the plant comprising a hopper, a material conveying apparatus for receiving material from the hopper, a plurality of material receiving points at different distances from said apparatus and in communication with said apparatus via a pipe system, a plurality of material divertor valves each disposed in the pipe system to control the flow of material to a respective one of the receiving points, and means for automatically producing a plurality of different predetermined amounts of compressed fluid whereby in plant use an appropriate one of said amounts of compressed fluid can be employed to enable said apparatus to convey material to a selected one of said receiving points.
Claim 2
Dependent Claim
132 words
A material handling plant for conveying powder or granular material by a compressed fluid to a selected one of a plurality of receiving points, the plant comprising a hopper, a material conveying apparatus for receiving material from the hopper, a plurality of material receiving points at different distances from said apparatus and in communication with said apparatus via a pipe system, a plurality of material divertor valves each disposed in the pipe system to control the flow of material to a respective one of the receiving points, and means for automatically producing a plurality of different predetermined amounts of compressed fluid whereby in plant use an appropriate one of said amounts of compressed fluid can be employed to enable said apparatus to convey material to a selected one of said receiving points.
Claim 3
Dependent Claim
27 words
Plant according to claim 1, wherein said means is provided by a plurality of fluid reservoirs of different size and connected to a supply of compressed fluid.
Claim 4
Dependent Claim
17 words
Plant according to claim 2, wherein the reservoirs form an integral part of the material conveying apparatus.
Claim 5
Dependent Claim
37 words
Plant according to claim 1, wherein said means is provided by a valve connected to a supply of compressed fluid and controlled by a timer to provide the valve with a plurality of different length blowing periods.
Claim 6
Dependent Claim
44 words
Plant according to claim 1, wherein said means is provided by a single reservoir connected to a supply of compressed fluid, and by pressure responsive valves operable to close at different pressures to permit different amounts of fluid to be supplied by the reservoir.
Claim 7
Dependent Claim
102 words
Plant according to claim 1, including a plurality of hoppers, one at each material receiving point, a plurality of material level controllers one for each hopper and each operable to emit a signal when the level in its respective hopper reaches a predetermined low limit, and means responsive to the emittance of a signal from any one of the controllers to automatically actuate the divertor valve of the appropriate hopper to permit material to enter that hopper and to automatically bring into effect an appropriate one of said amounts of compressed fluid to convey material to that hopper via its divertor valve.
Claim 8
Dependent Claim
91 words
A material handling apparatus comprising a vessel separated by a bulkhead into upper and lower spaces, the upper space being further divided by walls into separate chambers one defining an air reservoir and another a material receptacle with a closable inlet, the material chamber extending through the bulkhead to communicate with the lower space, the lower space having a material outlet, a further air reservoir provided within the vessel, and valves operable to put one or both reservoirs into communication with the lower space to sweep material therefrom toward said outlet.
Claim 9
Dependent Claim
91 words
A material handling apparatus comprising a vessel separated by a bulkhead into upper and lower spaces, the upper space being further divided by walls into separate chambers one defining an air reservoir and another a material receptacle with a closable inlet, the material chamber extending through the bulkhead to communicate with the lower space, the lower space having a material outlet, a further air reservoir provided within the vessel, and valves operable to put one or both reservoirs into communication with the lower space to sweep material therefrom toward said outlet.
Claim 10
Dependent Claim
50 words
Apparatus according to claim 7, and including an annular wall spaced from a lower wall of the lower space to define an annular gap which forms the air from the reservoir or reservoirs into an annular air stream to sweep the lower wall to move material therefrom toward said outlet.
Claim 11
Dependent Claim
28 words
Apparatus according to claim 7, and including a plurality of material receptacles each with its own closable inlet and each passing through the bulkhead into the lower space.
Claim 12
Dependent Claim
20 words
Apparatus according to claim 7, wherein the further reservoir is located above the bulkhead and surrounds the first mentioned reservoir.
Claim 13
Dependent Claim
26 words
Apparatus according to claim 7, wherein the vessel is generally cylindrical in shape and wherein the further resErvoir is spaced axially of the first mentioned reservoir.
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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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |