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:
Feb. 24, 2015
Filed:
Mar. 14, 2012
Olaf Langwald, Neukirch-Bernried, DE;
Frank Schuhmacher, Ravensburg, DE;
Ulf Lang, Salem, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A drain valve for draining liquid out of a container which comprises an essentially cylindrical opening that passes through a thickened area of the container wall, with an internally threaded section formed at an outer end thereof, followed by an interior space with a larger diameter into which a duct opens, and opposite the interior space an inner section with a smaller diameter opens into the container. A step is provided between the interior space and the inner section and serves as the seat for an associated end face of the valve element. A step between the interior space and the bore, on the one hand, and the inner end face of the valve element, on the other hand, are designed to co-operate as a valve seat which progressively opens and closes as the valve element is displaced.