The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 13, 2009
Filed:
Feb. 05, 2007
Dale Kempf, Clovis, CA (US);
Ken Lum, Fresno, CA (US);
Dale Kempf, Clovis, CA (US);
Ken Lum, Fresno, CA (US);
Grundfos Pumps Corporation, Olathe, KS (US);
Abstract
A thermostatically controlled bypass valve includes a housing having a first inlet port and a first discharge port located proximate to one another, wherein the first inlet port is configured to receive hot water, and the first discharge port is configured to discharge the hot water. The housing has a second inlet port and a second discharge port located proximate to one another, wherein the second inlet port is configured to receive cold water, and the second discharge port is configured to discharge the cold water. The first and second inlet and discharge ports are formed integral with one another as part of the housing, and the housing includes a passage permitting recirculating flow between the first and second inlet ports. A thermally sensitive actuating member is disposed in a chamber in the housing, wherein the thermally sensitive actuating member extends when heated and contracts when cooled. A bias spring is disposed in the chamber in the housing, wherein the bias spring engages the thermally sensitive actuating member and urges the thermally sensitive actuating member to contract. The thermally sensitive actuating member extends to close the passage and contracts to open the passage based on a temperature of the thermally sensitive actuating member.