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:
Jun. 10, 1986
Filed:
Sep. 19, 1985
Hozo Yoshino, Tokyo, JP;
System Homes Company, Ltd., Tokyo, JP;
Abstract
An electronic expansion valve comprising a stepping motor, motion conversion member for converting the rotational motion of the stepping motor to a screw motion, a valve pintle coupled to the motion conversion means to be rectilinearly displaced and having pistons at both ends of the valve pintle, of which the pistons are slidably supported on valve casing members, a valve body formed as an integral part of the valve pintle at an intermediate portion thereof, and a valve seat which has such an outer surface that when the valve pintle is displaced with respect to the valve seat in either direction, the cross sectional area and the shape of a passage defined between the valve seat and the valve pintle are smoothly varied. The valve can be used in refrigeration cycle with a compressor. Stable operation of the refrigeration cycle is obtained. The orifice contour created by a moving valve body and a valve seat is always maintained streamlined so that the friction loss therethrough is substantially reduced, whereby the coefficient of performance of the refrigeration cycle is improved.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile