Title: Valve construction and system utilizing the same

Abstract: A three-way changeover valve construction having a housing means provided with an inlet and a pair of outlets. A pair of valve seats are carried by the housing for respectively controlling fluid flow from the inlet through the outlets. A pair of valve members are provided for respectively controlling the valve seats with the valve members being operatively associated together to move substantially in unison relative to the valve seats in response to a condition sensed by a condition responsive device. A changeover device is operatively associated with the valve members to position the same to act respectively on one side of the pair of valve seats or on the other side of the pair of valve seats to change the valve construction from a cooling function thereof to a heating function thereof in response to a temperature change in the flowing medium.

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Inventors: Caldwell, Edward N. (Knoxville, TN, US)

Application Number: 461531
Filing Date: 1974-04-17
Publication_date: 1976-02-03
Assignee: Robertshaw Controls Company (Richmond, VA)
Primary Class(es): 236/1C 236/99K
Other Classes:
US Patent Ref:

3172600	Mar, 1965	Miner	236/1.
3182909	May, 1965	Noakes et al.	236/1.

Other Refs:
Primary Examiner: Wayner, William E.
Assistant Examiner:
Attorney: Candor, Candor & Tassone