Appeal No. 97-0970
Application 08/307,348
said seat structure are spaced apart (emphasis
added),
and that the actuator include pressure control valving for
“dissipating” the pressure differential which would normally
act on the valve member to force the valve member and the seat
into sealing engagement, to thereby enable disengaging of said
valve member and seat structure. Claim 15 on appeal recites
an actuator “for unseating the valve member and moving it away
from said surface” (emphasis added). After a careful review
of the
reversing valve arrangement in Van Allen it is clear to us
that this reference does not disclose, teach or suggest a
reversing valve as set forth in appellant’s claims on appeal.
Even though it appears possible that a portion of the
high pressure side of the valve member (38) of Van Allen might
move
out of engagement with the header (16) under some given set of
circumstances if the ports (52) and (68) were sized to permit
a sufficient reduction of the high pressure in the chamber
(11), any such movement of the valve member is contrary to the
6
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 Next
Last modified: November 3, 2007