Classifying – separating – and assorting solids – Stratifiers – With liquid treatment
Reexamination Certificate
2000-01-26
2001-07-24
Walsh, Donald P. (Department: 3653)
Classifying, separating, and assorting solids
Stratifiers
With liquid treatment
C209S493000, C209S697000
Reexamination Certificate
active
06264041
ABSTRACT:
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH
Not Applicable.
REFERENCE TO A MICROFICHE APPENDIX
Not Applicable.
BACKGROUND OF THE INVENTION
(1) Field of the Invention
This invention relates to a spiral trough separator for separating heavy particles from light particles where the particles normally result from mining operations; and, more particularly, this invention relates to an assembly for adjustment of a splitter and maintaining same in position in the spiral trough so as to separately recover one particle fraction from another.
(2) Description of the Related Art
U.S. Pat. No. 5,452,805 issued Feb. 9, 1993, describes and claims a spiral trough separator having spaced groups of parallel grooves in the trough to enhance the separation of solids from slurries of those solids.
U.S. Pat. No. 4,189,378 issued Feb. 19, 1980, describes and claims a spiral separator for dividing mineral fractions of different sizes of particles having at various locations in the helical trough a slotted opening through which a slurry of particles may be drawn off as a product; the opening being controlled in length by a slide and a splitter project upwardly into the trough, and the stream in the trough may be divided into different parts of the opening and thereafter to different product recovery zones of concentrate and middlings, for example. The splitter position is controlled by a manual adjustment slide mechanism allowing it to be positioned at any desired location from one end to the other of the slotted opening. This arrangement is not only complicated and expensive and relies on changes of size of the opening and associated piping, but is subject to potential jamming of the slide when fine particles become lodged in the slide mechanism.
BRIEF SUMMARY OF THE INVENTION
The present invention is an adjustable assembly for positioning a splitter in the trough of a spiral separator which carries a slurry of particles down the spiral for the purpose of separating the particles into fractions of different specific gravities. The assembly includes an elastomeric splitter vane attached to one end of a long springy rod while the other end of the rod is locked in place by any one of a plurality of spaced hook sockets. The rod is designed and shaped to press the splitter against the trough when the free end is locked into place by a selected hook socket, and this pressure on the splitter prevents it from becoming dislodged from the trough and thereby failing to produce a sharp separation between different particles. The splitter when locked cannot be moved even during high pressure washing of the spiral. When unlocked, the force from the rod pressing the splitter against the upper surface of the spiral is released and the splitter can be readily pivoted to a new position, without any jamming due to the slurry, and the rod relocked into another hook socket.
REFERENCES:
patent: 1516926 (1924-11-01), Pardee
patent: 2615572 (1952-10-01), Hodge
patent: 2952360 (1960-09-01), Oberg
patent: 3319788 (1967-05-01), Reichert
patent: 4614580 (1986-09-01), Giffard
patent: 4795553 (1989-01-01), Giffard
patent: 4836926 (1989-06-01), Grobler
patent: 5953797 (1999-12-01), Provost et al.
patent: 222598 (1959-07-01), None
Outokumpu Oyj
Rodriguez Joseph C
Walsh Donald P.
Yeager Arthur G.
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