US3580384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material feeding apparatus
Assignee: HEITKAMP Inc A CORP OF DE
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Filing: 1969-01-27
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Granted: 1971-05-25
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Expires: 1989-01-27
Abstract
Abstract Screw conveyor means for elevating a relatively thick wet fluid substance, such as cement mortar, in which a first conveyor screw feeds toward a conduit of less diameter containing a second conveyor screw connected to the first by a universal joint located at a point ahead of a converging conduit section at the intake end of the conduit.
Inventors
- 👤 Robert J Pingree
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:38
CPC Classifications
B; B65; B65G; B65G65/00; B65G65/30; B65G65/34; B65G65/40; B65G65/46
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
133 words
Conveyor means for elevating a wet relatively thick fluid substance such as cement mortar, comprising a hopper adapted to receive the substance, said hopper having an opening at one side, an inclined upwardly extending delivery conduit of smaller diameter than said opening, a junction conduit means between said hopper and said delivery conduit forming an extension of said opening and including a frustoconical section adjacent and on the same axis as said delivery conduit, a first conveyor screw in said hopper extending through said opening and into said junction conduit means, a second conveyor screw in said delivery conduit, the axes of said conveyor screws intersecting at a point between the hopper and said frustoconical section, universal joint means connecting said screws at said point, and means for rotating one of said screws.
Claim 2
Dependent Claim
133 words
Conveyor means for elevating a wet relatively thick fluid substance such as cement mortar, comprising a hopper adapted to receive the substance, said hopper having an opening at one side, an inclined upwardly extending delivery conduit of smaller diameter than said opening, a junction conduit means between said hopper and said delivery conduit forming an extension of said opening and including a frustoconical section adjacent and on the same axis as said delivery conduit, a first conveyor screw in said hopper extending through said opening and into said junction conduit means, a second conveyor screw in said delivery conduit, the axes of said conveyor screws intersecting at a point between the hopper and said frustoconical section, universal joint means connecting said screws at said point, and means for rotating one of said screws.
Claim 3
Dependent Claim
31 words
The conveyor means set forth in claim 1 in which the first conveyor screw is characterized by open flighting, and in which the second conveyor screw is characterized by solid flighting.
Claim 4
Dependent Claim
27 words
The conveyor means set forth in claim 2 in which the flighting of said second conveyor screw extends into said frustoconical section of the junction conduit means.
Claim 5
Dependent Claim
30 words
The conveyor means set forth in claim 2 in which the first conveyor screw has the capacity to deliver more material than can be taken by said second conveyor screw.
Claim 6
Dependent Claim
151 words
Conveyor means for a wet relatively thick fluid substance such as cement mortar, comprising an encasement adapted to receive the substance and having a discharge opening, a delivery conduit of smaller diameter than said discharge opening and extending at an angle of between 90* and 180* with respect to said opening, a junction conduit means between said encasement and said delivery conduit forming an extension of said opening and including a frustoconical section adjacent and on the same axis as said delivery conduit, a first conveyor screw in said encasement and extending through said opening into said junction conduit means, a second conveyor screw in said delivery conduit, said second conveyor screw being characterized By solid flighting, the axes of said conveyor screws intersecting at a point between the hopper and said frustoconical section, universal joint means connecting said screws at said point, and means for rotating one of said screws.
Claim 7
Dependent Claim
151 words
Conveyor means for a wet relatively thick fluid substance such as cement mortar, comprising an encasement adapted to receive the substance and having a discharge opening, a delivery conduit of smaller diameter than said discharge opening and extending at an angle of between 90* and 180* with respect to said opening, a junction conduit means between said encasement and said delivery conduit forming an extension of said opening and including a frustoconical section adjacent and on the same axis as said delivery conduit, a first conveyor screw in said encasement and extending through said opening into said junction conduit means, a second conveyor screw in said delivery conduit, said second conveyor screw being characterized By solid flighting, the axes of said conveyor screws intersecting at a point between the hopper and said frustoconical section, universal joint means connecting said screws at said point, and means for rotating one of said screws.
Claim 8
Dependent Claim
57 words
The conveyor means set forth in claim 5 in which the flighting of said first conveyor screw does not effectively occupy the entire cross-sectional are of said opening and junction conduit means available for the substance to be conveyed whereby buildup of excess pressure ahead of said first conveyor screw is relieved rearwardly axially of said screw.
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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |