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:
Sep. 30, 2008
Filed:
May. 05, 2004
Michael Dettmers, Kamen, DE;
Bernd Peters, Dülmen, DE;
Michael Dettmers, Kamen, DE;
Bernd Peters, Dülmen, DE;
DBT GmbH, Lunen, DE;
Abstract
The invention relates to a valve, especially a check valve, for hydraulic plungers () of shield-type support frames in underground mining with a valve housingand a switchable valve insert received therein, connections-for high pressure lines connected to the cylinder chamber and/or the annular space of the hydraulic cylinder, and at least one connectionfor an additional unit such as a pressure relief valve, a pressure sensor, and/or a pressure display. The valve housingcan be mounted to the hydraulic cylinder, and in the mounting stage, the connections-on the valve housingextend axially parallel to the axis of the hydraulic plunger. According to an advantageous further embodiment, the valve housing can be provided with at least one fastening means for an extension housingthat can be mounted in a releasable manner to at least one side wallB thereof for additional hydraulic functions of the shield-type support frame (see FIG.).