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:
Mar. 20, 1984
Filed:
Feb. 18, 1982
Isshi Nomura, Aichi, JP;
Motonobu Akagi, Kariya, JP;
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
A control valve assembly of the type in which a slide valve is driven along a hollow iron core by a linear motor to control the degree of communication between an inlet port and outlet port through the hollow interior of the iron core. A valve hole is provided in the slide valve so as to overlap a communicating hole formed in the iron core. When the linear motor is in the de-energized state the slide valve is retained by springs at a position that permits the valve hole to overlap the communicating hole to a predetermined extent. The linear motor upon being energized drives the slide valve against the springs so that the valve hole increases the opening degree of the communicating hole with an increase in the energizing current. Instead of providing the valve hole in the slide valve, a larger, second communicating hole may be formed in the iron core, this second hole being fully closed and the other communicating hole fully opened by the slide valve when the linear motor is de-energized. With energization, the fully open communicating hole is gradually closed and the second communicating hole gradually opened with an increase in the current as the slide valve is driven along the iron core against the springs. Thus the inlet and outlet ports are neither fully closed nor fully open to each other when the linear motor is in the de-energized state.