Patent US3799339A successfully refreshed from Google Patents.
US3799339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock trap for conveyor tube
Assignee: Beloit Corp
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Filing: 1973-04-13
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Granted: 1974-03-26
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Expires: 1993-04-13
Abstract
Abstract A rock trap is described for removing rocks and other heavy foreign objects from particulate material transmitted through a conveyor tube by a conveyor fluid, such as air. The particulate material is injected into the conveyor tube through an inlet openng at the top thereof, intermediate the ends of such tube, and the rock trap is positioned beneath and downstream from such inlet opening. A baffle plate is provided in the conveyor beneath the inlet opening so that such baffle plate extends longitudinally in the tube across such inlet opening and terminates above the top opening of the rock trap pocket. Rocks and other heavy foreign objects in the particulate material strike the baffle plate and roll and slide off the end of such plate into the rock trap pocket. The conveyor fluid is transmitted through the tube both above and below the baffle plate, and the conveyor fluid under such properly positioned plate flows across the top of the rock trap to prevent the particulate material from falling into such trap, while enabling rocks and other foreign objects to fall into such trap.
Inventors
- 👤 C Breitholtz
- 👤 G Lindberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:01
CPC Classifications
B; B07; B07B; B07B7/00; B07B7/01; B07B11/00; B07B11/06; Y; Y10; Y10S; Y10S209/00; Y10S209/91
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
219 words
Apparatus for removing heavy foreign objects from light weight particulate material transmitted through a tube, in which the improvement comprises: a conveyor tube; fluid means for causing a conveyor fluid to flow through said tube in one direction; injection means for injecting said material into said conveyor tube through an inlet opening intermediate the ends of said tube; trap means for removing said foreign objects from said material and out of said conveyor tube by gravity through an outlet opening in said tube, said trap means having a top opening which communicates with said outlet opening in said tube at a position beneath and downstream from said inlet opening; baffle means including a baffle plate extending substantially longitudinally in said tube beneath and across said inlet opening, for causing said foreign objects to strike the baffle plate and to move across said baffle plate which terminates above said top opening in front of the rear edge of said top opening so that said objects fall through the top opening into said trap means; and said fluid means transmitting said conveyor fluid through said conveyor tube above and below said baffle plate in said one direction, and for transmitting the fluid passing below said baffle plate across said top opening to prevent said material from falling into said trap means.
Claim 2
Dependent Claim
219 words
Apparatus for removing heavy foreign objects from light weight particulate material transmitted through a tube, in which the improvement comprises: a conveyor tube; fluid means for causing a conveyor fluid to flow through said tube in one direction; injection means for injecting said material into said conveyor tube through an inlet opening intermediate the ends of said tube; trap means for removing said foreign objects from said material and out of said conveyor tube by gravity through an outlet opening in said tube, said trap means having a top opening which communicates with said outlet opening in said tube at a position beneath and downstream from said inlet opening; baffle means including a baffle plate extending substantially longitudinally in said tube beneath and across said inlet opening, for causing said foreign objects to strike the baffle plate and to move across said baffle plate which terminates above said top opening in front of the rear edge of said top opening so that said objects fall through the top opening into said trap means; and said fluid means transmitting said conveyor fluid through said conveyor tube above and below said baffle plate in said one direction, and for transmitting the fluid passing below said baffle plate across said top opening to prevent said material from falling into said trap means.
Claim 3
Dependent Claim
13 words
Apparatus in accordance with claim 1 in which the conveyor fluid is air.
Claim 4
Dependent Claim
43 words
Apparatus in accordance with claim 1 in which said trap means includes a rear wall spaced from the rear end of said plate a distance at least twice that of the spacing between said conveyor plate and the bottom of said conveyor tube.
Claim 5
Dependent Claim
25 words
Apparatus in accordance with claim 3 in which the trap means includes an inclined front wall extending forwardly at an acute angle to said axis.
Claim 6
Dependent Claim
33 words
Apparatus in accordance with claim 2 in which the injection means feeds wood particles and foreign objects including rocks into the conveyor tube through an inlet opening in the top of said tube.
Claim 7
Dependent Claim
26 words
Apparatus in accordance with claim 1 in which the trap means includes a lower portion extending outward of said tube within which said objects are collected.
Claim 8
Dependent Claim
23 words
Apparatus in accordance with claim 6 which also includes discharge means for discharging said objects from said lower portion of said trap means.
Claim 9
Dependent Claim
42 words
Apparatus in accordance with claim 1 in which said plate extends horizontally in alignment with the axis of the conveyor tube and the top opeNing of said trap means has a length at least as big as the diameter of said tube.
Claim 10
Dependent Claim
24 words
Apparatus in accordance with claim 1 in which the fluid means includes an air blower means connected to the input end of said tube.
Claim 11
Dependent Claim
43 words
Apparatus in accordance with claim 1 in which the injection means includes a rotary air lock feeding means for feeding said material at a controlled rate into said tube without breaking the air lock formed across said inlet opening by said feeding means.
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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |