Heat exchanger bypass valve having temperature insensitive...

Details Heat exchanger bypass valve having temperature insensitive... Heat exchanger bypass valve having temperature insensitive...

2006-10-20

2010-06-15

Ciric, Ljiljana (Lil) V (Department: 3744)

Heat exchange

With timer, programmer, time delay, or condition responsive...

Temperature responsive or control

C236S034500, C236S09200D

Reexamination Certificate

active

07735546

ABSTRACT:
A by-pass valve for a heat exchanger circuit includes a chamber, a fixed surface secured against movement relative to the chamber, a by-pass port including a valve seat located in the chamber, an actuator located in the chamber and that moves relative to the valve seat in response to a temperature of the actuator, a valve member, a spring contacting the surface and the valve seat and producing a force urging the valve member to engage the valve seat and to close the by-pass port, the spring having no structural connection to the actuator, and a return spring secured to the actuator and contacting the valve member for urging the actuator to retract and the valve member to open the by-pass port.

REFERENCES:
patent: 5048751 (1991-09-01), DuBois
patent: 5228618 (1993-07-01), Afshar
patent: 5738276 (1998-04-01), Saur
patent: 6253837 (2001-07-01), Seiler et al.
patent: 6935569 (2005-08-01), Brown et al.

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