Orifice valve for bulk solids

Details Orifice valve for bulk solids Orifice valve for bulk solids

2006-02-09

2008-12-16

Fristoe, Jr., John K (Department: 3753)

Valves and valve actuation

Reciprocating valve

Gate

C251S326000, C277S491000

Reexamination Certificate

active

07464913

ABSTRACT:
An orifice valve having a moveable gate to control the flow of solids in a closed conveying system. The invention encompasses a valve housing with two complementary valve sections, each of a unitary construction. A single plate has a first planar surface, two opposed sidewalls and an end wall. The sidewalls include an integral flange section which presents planar surfaces that are placed in facing relationship with the planar flange surfaces of a second housing member so that the two form a closed cavity. A blade is received in the cavity and is reciprocal between open and closed positions so as to accommodate the flow of material or to block the flow. A novel guide seal member comprises spaced planar elements which are adapted to be sandwiched between the two opposed flanges of the housing sections, a second section which extends transversely to the planar section and presents a bearing surface across which the blade moves, a third section which extends transversely to the planar section at the opposite end thereof and overlaps the flanges, and a second guide seal member at the opposite end of said aligned housing sections and sandwiched between opposed flanges.

REFERENCES:
patent: 4345739 (1982-08-01), Wheatley
patent: 4541453 (1985-09-01), Graf et al.
patent: 5255893 (1993-10-01), Peterson
patent: 5449146 (1995-09-01), Weagraff
patent: 5938175 (1999-08-01), Young et al.
patent: 6227234 (2001-05-01), Powers
patent: 6932355 (2005-08-01), Hjertholm

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