Abstract A placer mining apparatus is provided and includes a sluice box having riffle bars therein and a water and gravel inlet at one end provided with an adjustable control gate. The other end of the sluice box includes pressurized water inlet nozzles for creating back pressure to the flow of water and gravel entering through the inlet and the end of the sluice box into which the inlet opens is also provided with a removable cover plate for which a downwardly opening hopper box may be substituted. Also, a floatable motor driven pump is provided and includes an outlet connected to the inlet of the sluice box and an inlet having a flexible hose secured thereto at one end, the other inlet end of the hose being provided with a suction bit. There is also provided an upstanding container having an upper inlet to which the outlet of the motorized pump may be connected in lieu of the inlet for the sluice box and the container includes a grizzly screen mounted transversely therein below the inlet of the container.
A PORTABLE PLACER MINING APPARATUS INCLUDING A SLUICE BOX HAVING A GENERALLY FLAT BOTTOM AND UPSTANDING PERIPHERAL WALLS, AN INLET FOR WATER UNDER PRESSURE OPENING THROUGH ONE UPSTANDING WALL OF THE BOX TOWARD THE REMOTE MARGINAL PORTION OF THE BOX, SAID REMOTE MARGINAL PORTION INCLUDING A WATER OUTLET FORMED IN THE CORRESPONDING UPSTANDING WALL ELEVATED ABOVE THE BOTTOM WALL OF THE BOX, GENERALLY HORIZONTAL AND RADIALLY ARRANGED RIFFLE RODS SPACED ABOUT AND EXTENDING OUTWARD FROM A CENTRAL ZONE OF SAID BOX INTERMEDIATE SAID INLET AND OUTLET AND SPACED SLIGHTLY ABOVE SAID BOTTOM WALL AND, A PLURALITY OF WATER JET OUTLETS SPACED ABOUT THE PERIPHERY OF SAID REMOTE MARGINAL PORTION OF SAID BOX, SAID WATER JET OUTLETS BEING DISPOSED TO DIRECT GENERALLY HORIZONTAL JETS OF WATER THEREFROM INWARDLY AT AN ELEVATION ABOVE SAID RODS AND TOWARDS A CENTRAL AREA OF SAID BOX DISPOSED TO THE SIDE OF SAID CENTRAL ZONE TOWARD SAID REMOTE MARGINAL PORTION.
Claim 2
Dependent Claim
154 words
A PORTABLE PLACER MINING APPARATUS INCLUDING A SLUICE BOX HAVING A GENERALLY FLAT BOTTOM AND UPSTANDING PERIPHERAL WALLS, AN INLET FOR WATER UNDER PRESSURE OPENING THROUGH ONE UPSTANDING WALL OF THE BOX TOWARD THE REMOTE MARGINAL PORTION OF THE BOX, SAID REMOTE MARGINAL PORTION INCLUDING A WATER OUTLET FORMED IN THE CORRESPONDING UPSTANDING WALL ELEVATED ABOVE THE BOTTOM WALL OF THE BOX, GENERALLY HORIZONTAL AND RADIALLY ARRANGED RIFFLE RODS SPACED ABOUT AND EXTENDING OUTWARD FROM A CENTRAL ZONE OF SAID BOX INTERMEDIATE SAID INLET AND OUTLET AND SPACED SLIGHTLY ABOVE SAID BOTTOM WALL AND, A PLURALITY OF WATER JET OUTLETS SPACED ABOUT THE PERIPHERY OF SAID REMOTE MARGINAL PORTION OF SAID BOX, SAID WATER JET OUTLETS BEING DISPOSED TO DIRECT GENERALLY HORIZONTAL JETS OF WATER THEREFROM INWARDLY AT AN ELEVATION ABOVE SAID RODS AND TOWARDS A CENTRAL AREA OF SAID BOX DISPOSED TO THE SIDE OF SAID CENTRAL ZONE TOWARD SAID REMOTE MARGINAL PORTION.
Claim 3
Dependent Claim
21 words
The combination of claim 1 including a center support for said riffle rods supported within said box for vertical shifting therein.
Claim 4
Dependent Claim
20 words
The combination of claim 1 wherein said bottom wall includes a removably closable outlet opening therein beneath said central zone.
Claim 5
Dependent Claim
21 words
The combination of claim 3 including a central support for said riffle rods supported within said box for vertical shifting therein.