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:
Apr. 30, 2019
Filed:
Jun. 30, 2014
Danfoss A/s, Nordborg, DK;
Bjarke Skovgard Dam, Almind, DK;
Georg Fosel, Flensburg, DE;
Carsten Molhede Thomsen, Vejle, DK;
Louis Sullivan, Indianapolis, IN (US);
Danfoss A/S, Nordborg, DK;
Abstract
An expansion valve () for a vapour compression system, the valve comprising a first valve part () having an outlet orifice () and a piston () movable inside the outlet orifice () in response to a differential pressure across the expansion valve (), controlling a fluid flow through the first valve part (), via a forward fluid passage through the first valve part (). The piston () has different cylindrical shapes stepwise along a longitudinal extension of the piston (), the piston () defining a first cross-sectional area along a first longitudinal extension and a second-cross sectional area along a second longitudinal extension, the first cross-sectional area being smaller than the second-cross sectional area. The first longitudinal extension is in the outlet orifice () at a first differential pressure and the second longitudinal extension is in the outlet orifice () at a second differential pressure, the first differential pressure being lower than the second differential pressure.