Appeal No. 97-2602
Application 08/422,795
The invention relates to “high performance butterfly valves wherein the pivotable
disk which is rotated to open and close the valve has a partially beveled outer periphery”
(specification, page 1). Claim 1 is illustrative and reads as follows:
1. A high performance butterfly valve comprising:
a valve body having a substantially circular bore, said bore being adapted for the
fluid flow through said bore and having a centerline through said bore;
a disk adapted for movement between an open position thereby allowing fluid flow
through said circular bore and a closed position wherein fluid flow through said circular
bore is restricted, said disk having the shape of a diagonal cross-section of a round rod
and having an outer face and an inner face, said outer face having a peripheral edge, at
least a portion of the circumference of said peripheral edge being notched, said inner face
being adapted for mounting said disk in said circular bore, said disk having a centerline
corresponding to the centerline of said bore;
an annular valve seat mounted in said valve body thereby providing a sealing
surface extending into said circular bore for sealing said disk when said disk is in a closed
position; and,
a shaft for mounting said disk in said circular bore and for rotating said disk
between open and closed positions, said shaft having a centerline corresponding to the
center of rotation of said disk, said centerline of said shaft being offset from said centerline
of said bore and said disk.
The reference relied upon by the examiner as evidence of anticipation and
obviousness is:
Miyairi 5,158,265 OCT. 27, 1992
Claims 1 through 8 stand rejected under both the first and second paragraphs of 35
U.S.C. § 112. In addition, claims 1, 2 and 5 through 8 stand rejected under 35
2
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