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. 04, 2005
Filed:
Jan. 13, 2003
Masahiro Kobayashi, Obu, JP;
Hirohisa Ito, Obu, JP;
Daisuke Yamamoto, Obu, JP;
Shigetaka Yoshikawa, Nishikamo-gun, JP;
Yoshikazu Shinpo, Nissin, JP;
Isao Takagi, Okazaki, JP;
Masahiro Kobayashi, Obu, JP;
Hirohisa Ito, Obu, JP;
Daisuke Yamamoto, Obu, JP;
Shigetaka Yoshikawa, Nishikamo-gun, JP;
Yoshikazu Shinpo, Nissin, JP;
Isao Takagi, Okazaki, JP;
Aisan Kogyo Kabushiki Kaisha, Obu, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A flow control valve used in a cooling system of a water cooling type includes a first valve body and a first valve seat for controlling a quantity of radiator flow which returns from an engine to a pump through a radiator, a second valve body and a second valve seat for controlling a quantity of bypass flow which returns from the engine to the pump without passing through the radiator, and a step motor for displacing the valve bodies integrally as a valve unit. The first valve body, the first valve seat, the second valve body, and the second valve seat are so arranged that, in a range where the radiator flow quantity becomes practically zero, the bypass flow is permitted to flow at a slightly larger quantity than the radiator flow and, in other ranges, the bypass flow quantity is equal to or lower than the radiator flow quantity.