Valves and valve actuation – Reciprocating valve – Gate
Reexamination Certificate
2004-12-22
2008-10-07
Fristoe, Jr., John K. (Department: 3753)
Valves and valve actuation
Reciprocating valve
Gate
C251S118000, C251S205000
Reexamination Certificate
active
07431264
ABSTRACT:
A valve for controlling the flow of materials is provided. The valve has a valve body having a bore, a guide attached to the valve body, a gate movable within the guide into and out of the bore, and an actuator for the gate, the bore of the valve body having a profile where the gate enters the bore, and the gate having a concave leading edge conforming to a profile of the bore. The valve may be used in throttling applications.
REFERENCES:
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patent: 3190305 (1965-06-01), Schulze
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patent: 5292105 (1994-03-01), Velimirovic
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patent: 5449146 (1995-09-01), Weagraff
patent: 5895028 (1999-04-01), Varady
patent: 5938175 (1999-08-01), Young et al.
patent: 6422535 (2002-07-01), Stone et al.
patent: 6745999 (2004-06-01), Heinecke et al.
“Fabri-Valve Slide Gate Valve” brochure, Engineered Valves Group, ITT Industries, USA, printed prior to Nov. 15, 2004, 4 pages.
Fristoe Jr. John K.
Lambert Anthony R.
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