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 Title: |
US3941690:
Portable sluice pan
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Powers, Michael D.; Spokane, WA
Piton, William J.; Spokane, WA
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| Assignee: |
Piton; William J., Spokane, WA
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| Published / Filed: |
1976-03-02
/ 1974-11-29
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| Application Number: |
US1974000528429
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| IPC Code: |
Advanced:
B03B 5/26;
Core:
B03B 5/00;
IPC-7:
B03B 5/26;
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| ECLA Code: |
B03B5/26;
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| U.S. Class: |
Current:
209/443;
209/044;
209/458;
209/485;
Original:
209/443;
209/458;
209/485;
209/044;
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| Field of Search: |
209/044,435,443,455,485,506,508,260,441,460,497,499
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| Priority Number: |
| 1974-11-29 |
US1974000528429 |
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| Abstract: |
A portable sluice pan is described for panning for gold and other valuable heavy minerals from placer deposits. The pan includes an elongated trough having a feed hopper at one end and a removable flexible riffle mat in the bottom of the trough to cause the placer pulp to flow in a turbulent manner over the riffles to stratify the heavier and lighter materials. The sluice pan is constructed of light weight material such as aluminum and may be hand held during operation.
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| Attorney, Agent or Firm: |
Wells, St. John & Roberts ;
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| Primary / Asst. Examiners: |
Lutter, Frank W.; Hill, Ralph J.
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| Family: |
None
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First Claim:
Show all 8 claims |
What is claimed is:
1. A portable sluice pan for concentrating gold-bearing placer material comprising:
- an elongated channel sluice trough having a head end and an open overflow end, said trough having a U-shaped cross section with a bottom wall and opposing side walls extending from the head end to the overflow end;
- a mixing hopper having an exit opening communicating with the trough adjacent the head end for receiving the placer material and water and for mixing the placer material and water to form a sluice pulp and for directing the pulp into the trough at the head end;
- said hopper having inclined walls with a rear wall extending downward into the sluice trough terminating at the bottom wall of the sluice trough intersecting the bottom wall at a predetermined longitudinal location of the sluice trough;
- said hopper having a forward wall extending downward into the sluice trough terminating in a throat edge which is vertically spaced from the trough bottom wall directly overlying the intersection of the rear wall of the hopper and the bottom wall of the sluice trough; and
- an elongated flexible riffle mat removably mounted in the trough on the bottom wall and extending from the head end to the overflow end; said riffle mat having a plurality of cross riffles spaced at intervals along the mat to permit the pulp to flow from the head end and the overflow end while causing the pulp to flow in a turbulent manner over the riffles to separate the heavier gold-bearing particles from lighter particles.
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| Background / Summary: |
Show background / summary
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| Drawing Descriptions: |
Show drawing descriptions
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| Description: |
Show description
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| Forward References: |
Show 7 U.S. patent(s) that reference this one
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