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:
Feb. 09, 1993
Filed:
Dec. 12, 1991
Masahiro Kobayashi, Obu, JP;
Aisan Kogyo Kabushiki Kaisha, Obu, JP;
Abstract
Herein disclosed is a flow control valve, in which a lift type valve member having a valve stem is disposed in a valve housing and in which a motor has an output shaft moving in an axial direction inside of a rotor through threaded portions. The valve member is moved in a closing direction through the valve stem when the output shaft moves in the projecting direction. A first retainer is attached to the leading end of the output shaft, and a coil spring for urging the output shaft in the projecting direction is sandwiched between the first retainer and the front portion of the motor. To the leading end of the valve stem, there is attached a second retainer which is connected to the first retainer through a valve closing coil spring for urging the valve stem in the closing direction. The former coil spring has its spring force set weaker than that of the latter valve closing coil spring.