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:
Oct. 25, 2005
Filed:
Jan. 30, 2003
Franz-heinrich Suilmann, Laer, DE;
Sebastian M. Mundry, Ludinghausen, DE;
Patrick Hantke, Aachen, DE;
Torsten Boldt, Aachen, DE;
Franz-Heinrich Suilmann, Laer, DE;
Sebastian M. Mundry, Ludinghausen, DE;
Patrick Hantke, Aachen, DE;
Torsten Boldt, Aachen, DE;
DBT Automation GmbH, Lunen, DE;
Abstract
The present invention relates to a pilot control valve, especially for use in mining hydraulics. The valve has a valve insert constructed as a valve cartridge, whose single or multipart valve housing has an input entryfor pressure fluid P, a connection openingfor a load connection A, an output openingopening into the return flow T and an axial boringto accept a valve closing bodyprovided with a closing surface, which can be lifted from a valve sealing seatarranged between the entry openingand the connection openingby means of an electro-magnetic or piezo-electric switching device which can be fastened onto the valve housing. With the lifting movement of the valve closing bodyfrom the valve sealing seatis coupled an at least two part closing mechanism for their separation arranged between the connection openingand the output openingIn accordance with the present invention a single part valve closing bodyis provided, having the sealing surface in the form of a collarand the moving part of the closing mechanism in the form of a shaft sectionwhereby the shaft sectionenters into a boring sectionC of the axial boringduring the lifting movement, closing a radial openingThe valve sealing seatcan be exchanged with a valve sleeveand the nominal bore of the pilot control valve can be changed by means of a throttle