Classifying – separating – and assorting solids – Plural – diverse separating operations – Aqueous suspension – sifting – and stratifying
Reexamination Certificate
2003-11-19
2009-08-11
Mackey, Patrick H (Department: 3653)
Classifying, separating, and assorting solids
Plural, diverse separating operations
Aqueous suspension, sifting, and stratifying
C209S018000, C209S364000, C209S365100, C209S365300
Reexamination Certificate
active
07571815
ABSTRACT:
The aim of the invention is to provide a sieve jigger comprising a sieved-product rocker that can be pivoted upwards and downwards, whose lifting displacement and/or lifting frequency can be controlled beyond previously accepted limits and which does not require vibration dampers that are subject to wear. To achieve this, the sieved-product rocker is operated by means of a lifting and braking cylinder comprising an integrated measuring device for the displacement of the cylinder piston and a working chamber, to which a hydraulic-oil supply and evacuation conduit is connected, said conduit containing an integrated proportional control valve. The lifting and braking cylinder interacts with the proportional control valve by means of a displacement sensor and a governor in order to control the displacement upwards and downwards and thus the lifting height and/or the lifting frequency of the rocker.
REFERENCES:
patent: 4563271 (1986-01-01), Schroder et al.
patent: 5207742 (1993-05-01), Scutt et al.
patent: 5740920 (1998-04-01), Timmermann
patent: 6070738 (2000-06-01), Lyman et al.
patent: 2006/0070593 (2006-04-01), Schmidt
patent: 3322137 (1984-12-01), None
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Aufbereitungs-Technik Publication dated Dec. 30, 1989., No. 12 entitled Operational experience on a moving-bed jig built by KHD Humboldt Wedag AG for predestoning at the Emil Mayrisch colliery.
Juranek Jürgen
Kreutzer Hans-Günther
Pufal Hans Rolf
Greer Burns & Crain Ltd.
KHD Humboldt Wedag GmbH
Mackey Patrick H
Matthews Terrell H
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