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:
May. 13, 2003
Filed:
Nov. 22, 2000
Yasuo Komiya, Saitama, JP;
Seiichi Nakano, Saitama, JP;
Hideki Sekiguchi, Saitama, JP;
Tokuji Yatsui, Saitama, JP;
Kabushiki Kaisha Saginomiya Seisakusho, Tokyo, JP;
Abstract
The present invention provides a motor-operated valve having no additional stopper for stopping the rotation of a rotor at fully open and closed states of the valve to allow a reduced number of parts of the valve and to prevent a noise otherwise generated by the abutment of the rotor against a stopper. The motor-operated valve includes a rotor having a shaft formed with an external thread The motor-operated valve also includes a needle valve element having a needle valve head at one end portion thereof and an internal thread engaging with the external thread at another end portion. The valve element has a joining portion for joining the valve head to the internal thread The motor-operated valve also includes a main valve body having a guide portion which stops the rotation of the valve element but allows the axial movement of the valve element. The shaft has an upper end supported by a supporting portion provided on a top wall of a valve housing while a lower end of the shaft is rotatably supported by a bearing secured to the main valve body.