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:
Nov. 27, 2012
Filed:
Dec. 02, 2008
Thomas Kleegrewe, Minden, DE;
Thomas Kleegrewe, Minden, DE;
ABB AG, Mannheim, DE;
Abstract
The disclosure relates to a method for operation of a position regulator for control of a pneumatic drive for an actuating member in a process installation. The position regulator has a pneumatic system with at least one nozzle/bounce-plate system, in which the bounce plates are in the form of piezo bending bars. For damped ventilation and venting of the pneumatic drive in the event of failure of the electrical power, it is proposed that the level of the electrical power supply be monitored and that, if a predeterminable limit value is undershot, the piezo bending bars of the pneumatics are adjusted via the input signals of the pneumatics such that the pneumatically controlled valves, which are subject to a characteristic, of the amplifier are open precisely just so far that a damped movement of the pneumatic actuating drive takes place to a predeterminable limit position at the desired movement speed.