Fluid handling – Freeze condition responsive safety systems – Low temperature responsive drains
Reexamination Certificate
2005-05-17
2005-05-17
Hirsch, Paul J. (Department: 3753)
Fluid handling
Freeze condition responsive safety systems
Low temperature responsive drains
C137S079000
Reexamination Certificate
active
06892747
ABSTRACT:
A temperature and pressure sensitive valve is disclosed herein. The valve has a valve piston for regulating flow through the valve, a valve piston guide for directing movement of the piston, the piston guide having one or more passages there through, a thermal element for enabling movement of said piston, and an elongated housing having an anterior and posterior end and an interior wall able to house the piston, guide and thermal element. The housing further has two or more passages able to aid the piston in regulating flow, with at least one of the passages placed towards the anterior end of the housing, and at least one of the passages placed towards the posterior end of the housing.
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Hirsch Paul J.
LeCroy David P.
Research by Copperhead Hill, Inc.
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