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:
Apr. 18, 2000
Filed:
Jun. 03, 1998
Heinfried Hoffmann, Frankfurt am Main, DE;
Lothar Kemmler, Moerfelden-Walldorf, DE;
Joerg Kiesbauer, Eppertshausen, DE;
Samson Aktiengesellschaft, Frankfurt, DE;
Abstract
The invention relates to a control apparatus, comprising an actuating drive and an actuator connected therewith, whereby the actuator comprises at least one valve face and a throttle element that works herewith. The throttle element can be moved relative to the valve face by means of an actuating spindle connected with the actuating drive for the execution of a rotational and/or piston motion. The actuating spindle is sealed against the valve interior chamber at a first sealing location. A second sealing location likewise seals the actuating spindle, and, between the two sealing locations. There is a test chamber that is accessible via at least one control terminal, to which chamber a pressure sensor is connected. The pressure sensor is connected with an evaluation unit for monitoring the operation of the control apparatus. The signal output of the pressure sensor can be compared, in the evaluation unit, with a response threshold dependent on at least one temperature signal, for the outputting of an error status message to an error status output of the evaluation unit.