Fluid handling – Processes – Cleaning – repairing – or assembling
Reexamination Certificate
2007-11-27
2007-11-27
Krishnamurthy, Ramesh (Department: 3753)
Fluid handling
Processes
Cleaning, repairing, or assembling
C137S512000, C137S852000, C417S413200, C417S566000
Reexamination Certificate
active
10929468
ABSTRACT:
A micropump check valve device which can be designed thin with good assemblability and applied with urging force. The micropump check valve device includes an upstream side member having a small-bore hole for passing therethrough a fluid, a downstream side member having a large-bore hole for passing therethrough the fluid, and a valve member having a valve mechanism sandwiched between the upstream side member and the downstream side member. The valve mechanism includes a passing hole formed in correspondence to a position and a size of the large-bore hole in the downstream side member, a contacting part formed inside the passing hole in correspondence to the position and size of the small-bore hole in the upstream side member thereby to close the small-bore hole, and supporting parts formed to bridge across the passing hole to support the contacting part. The valve member has a greater linear expansion coefficient than the upstream side and downstream side members.
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Krishnamurthy Ramesh
Steptoe & Johnson LLP
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