Fluid handling – Line condition change responsive valves – Direct response valves
Reexamination Certificate
2006-08-01
2006-08-01
Krishnamurthy, Ramesh (Department: 3753)
Fluid handling
Line condition change responsive valves
Direct response valves
C137S512150, C137S513300
Reexamination Certificate
active
07082967
ABSTRACT:
An umbrella valve includes an elastic cap, and an elastic stem formed integrally with the cap, having a center hollow portion, having an enlarged hollow portion proximate the cap, and having a bottom. The valve has a needle having an enlarged head at a proximal end thereof for being snugly secured in the enlarged hollow portion of the stem, having a lower lateral hole in a distal portion, having an upper lateral hole proximate the bottom of the stem, and having a lengthwise center passageway connecting the upper and lower lateral holes. A method includes providing a needle for being snugly secured in one of a plurality of elastic caps, the needle having a lengthwise center passageway connecting upper and lower lateral holes. The method includes selecting a cap from among the plurality of elastic caps by determining opening pressure factors.
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Kohlmann Michael R.
Sarajian Kissak T.
Engineered Products & Services Inc.
Jansson, Shupe, Munger & Antaramian, Ltd.
Krishnamurthy Ramesh
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