Classifying – separating – and assorting solids – Sifting – Elements
Reexamination Certificate
2005-08-17
2008-12-23
Mackey, Patrick H (Department: 3653)
Classifying, separating, and assorting solids
Sifting
Elements
C209S399000, C209S403000, C209S408000, C209S412000
Reexamination Certificate
active
07467715
ABSTRACT:
A screening assembly support frame includes a body member defining a longitudinal axis. The body member has a pair of parallel, spaced elongate support members with a spacer arrangement extending between the support members. An engaging formation, for engaging a screen panel of the screening assembly to be supported by the body member, is carried on each support member with the body member and the engaging formations being symmetrical about the longitudinal axis.
REFERENCES:
patent: 4219412 (1980-08-01), Hassall
patent: 7216768 (2007-05-01), Fisher et al.
patent: 2004/0074821 (2004-04-01), Russell et al.
patent: 2004/0149632 (2004-08-01), Schulte et al.
Johnson Ronald Leslie
McGregor Ronald Keith
Mackey Patrick H
Matthews Terrell H
Patterson & Sheridan L.L.P.
Weatherford Australia Pty Limited
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