US Patent Issued to Rinnai on June 23 for "Three-way valve" (Japanese Inventor)

ALEXANDRIA, Va., July 15 -- United States Patent no. 12,663,093, issued on June 23, was assigned to Rinnai Corp. (Aichi, Japan).

"Three-way valve" was invented by Naoto Takagi (Aichi, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "To assemble a three-way valve without weakening the bond between a driver and a shaft with grease adhering to the shaft end, a straight flow path includes two ends and an intermediate portion respectively continuous with first to third ports, and first and second valve orifices having opening areas changed when first and second valve elements (34a, 34b) at the bottom of the shaft (35) move. The shaft extends through a bearing (42) in a guide (41) with its top bonded inside th...