Fluid handling – Line condition change responsive valves – Direct response valves
Reexamination Certificate
2011-03-22
2011-03-22
Bastianelli, John (Department: 3753)
Fluid handling
Line condition change responsive valves
Direct response valves
C251S332000, C251S334000, C251S357000, C277S489000
Reexamination Certificate
active
07909057
ABSTRACT:
A valve insert including a ring made of a resilient material. The ring has a shape that is defined by the rotation of an irregular polygon around a central axis. Superposing a quadrilateral and a circle forms the irregular polygon.
REFERENCES:
patent: 3742976 (1973-07-01), Bailey
patent: 4180097 (1979-12-01), Sjoberg
patent: 4951707 (1990-08-01), Johnson
patent: 5249600 (1993-10-01), Blume
patent: 5345965 (1994-09-01), Blume
patent: 6955181 (2005-10-01), Blume
patent: 6955339 (2005-10-01), Blume
patent: 7168440 (2007-01-01), Blume
Bastianelli John
Greiner Stephen R.
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