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:
Aug. 23, 2011
Filed:
Aug. 24, 2009
Siegfried Roth, Gerlingen, DE;
Albrecht Waldenburg, Stuttgart, DE;
Uta Andrä, Lichtenwald, DE;
Otto Egelhof GmbH & Co. KG, Fellbach, DE;
Abstract
The invention relates to an expansion valve, in particular for a vehicle air-conditioning system operated with cooling medium, with a valve seat () and a valve-closing element (), which closes a passage opening () between a cooling medium inlet opening () and a cooling medium outlet opening (), and with an actuating device () which acts on the valve-closing element () and opens and closes the passage opening (), a shortened maximum working lift for opening the valve-closing element () out of the valve seat () being provided, at which a ball seat cross section formed between valve-closing element () and valve seat () is designed to be smaller than an annular gap cross section formed between a transmission pin () of the actuating device () and a passage opening ().