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. 30, 2001
Filed:
Jan. 04, 2000
Jens Burmester, Grambek, DE;
Tuchenhagen GmbH, Buchen, DE;
Abstract
The invention refers to an actuating device for a double seat valve with cleanable seat, provided with two individually moveable closure members, which can be brought, additional to the open position, independent from each other, to a partial open position, wherein it shall be secured that the partial stroke movement to be carried out during the seat cleansing of the dependently actuated closure member is possible with relatively low pressures of the pressure medium, without the necessity to take pressure compensation measures at the respective closure member or for the increase of the diameter of the actuating piston. Furthermore it shall be possible, if required, to effect also the opening movement of the double seat valve with the conditions named above. This is achieved in that an additional piston (,*) is provided between the first piston (,) and the valve housing (,), which is externally supported in the drive housing (,) in sealed and moveable manner and is internally rigidly connected with the second piston (,), that the first piston (,) is internally supported on the assembly (,*) consisting of the second piston (,) and the additional piston (,*) in sealed and moveable manner, and that the second piston (,) and the additional piston (,*) are acted upon by pressure medium in the same direction (FIG.,).