Pumps – Expansible chamber type – Having pumping chamber pressure responsive distributor
Reexamination Certificate
2006-05-09
2006-05-09
Freay, Charles G. (Department: 3746)
Pumps
Expansible chamber type
Having pumping chamber pressure responsive distributor
C417S571000
Reexamination Certificate
active
07040877
ABSTRACT:
A valve plate assembly includes an upper valve plate, a lower valve plate, an annular spacer and a center spacer. The annular spacer is located between the upper and lower valve plates and around the outer periphery of the upper and lower valve plates. The center spacer is located at approximately the geometric center of the valve plate assembly to provide additional support for the valve plate assembly.
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Bergman Ernest R.
Schulze Brad A.
Schulze Scott D.
Copeland Corporation
Freay Charles G.
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