Automatic temperature and humidity regulation – Thermostatic – In fluid controlled
Reexamination Certificate
2009-01-16
2011-11-29
Norman, Marc (Department: 3744)
Automatic temperature and humidity regulation
Thermostatic
In fluid controlled
C236S100000, C236S09900R
Reexamination Certificate
active
08066198
ABSTRACT:
A valve apparatus can be used to select between a cold or a hot coolant for heat exchange, this selection depending on whether an attached heat exchanger is to operate as a cooler or a heater. The apparatus includes a valve housing with first and second chambers formed therein, first inlet and outlet ports for flow of a primary liquid into and out of the first chamber and further ports for flow of coolant at different temperatures through the second chamber. A linear actuator in the housing has a body containing wax and a plastic piston that is movable to an extended position by expansion of the wax. The actuator body is located in the first chamber so the temperature of the wax is dependent on the liquid's temperature in the first chamber. An end portion of the actuator adjacent to the second chamber is made of plastic. A valve mechanism for controlling coolant flow is operably connected to the piston and located in the second chamber. This mechanism includes a spool movable by the actuator.
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Advertising document published by Behr at least as early as 2002 illustrating cooling module for BMW 7 series including Figures 1-7 and Figure 9 and transparent illustration.
Palanchon Herve
Sheppard Jeffrey Owen
Dana Canada Corporation
Norman Marc
Ridout & Maybee LLP
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