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:
Jan. 31, 2006
Filed:
Dec. 20, 2002
Roland Cäsar, Stuttgart, DE;
Jan Gärtner, Stuttgart, DE;
Frank Obrist, Dornbirn, AT;
Jürgen Wertenbach, Fellbach, DE;
Roland Cäsar, Stuttgart, DE;
Jan Gärtner, Stuttgart, DE;
Frank Obrist, Dornbirn, AT;
Jürgen Wertenbach, Fellbach, DE;
DaimlerChrysler AG, Stuttgart, DE;
Abstract
In a needle valve () for a high-pressure gas conduit system consisting of two units () which are joined and one of which encloses a stepping motor () and the other includes gas flow passages and a gas flow control bore (), a valve needle () is supported in the housing unit so as to be movable by the stepping motor and extends into the gas flow control bore () in the other housing unit through a guide passage () provided with seals to prevent gas from flowing to the housing unit including the stepping motor () between a region of the guide bore () and a low pressure region of the needle valve () a compensation connection is provided for relief of pressure at the sealing region () of the guide bore (). The needle valve is particularly suitable as an expansion valve in an automotive COair conditioning system.