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:
Feb. 16, 2010
Filed:
Feb. 07, 2006
Mark V. Chester, Tiverton, RI (US);
Peter S. Levesque, Norwood, MA (US);
Alex J. Legere, Avon, MA (US);
Mark V. Chester, Tiverton, RI (US);
Peter S. Levesque, Norwood, MA (US);
Alex J. Legere, Avon, MA (US);
Dresser, Inc., Addison, TX (US);
Abstract
Systems and processes may provide improved performance for a pneumatic positioner during a safety override. In certain implementations, a system and process may include the ability to receive an input control signal, power control circuitry of the pneumatic positioner using the input control signal, and generate a control signal for a signal-to-pressure converter with the control circuitry based at least partially on the input control signal. The system and process may also include the ability to detect an unsafe operating condition for the pneumatic positioner based on an input signal and modify the control signal in response to detecting the unsafe operating condition, to cause the converter to transition to a safe state. The system and process may additionally include the ability to allow the control circuitry to continue being powered by the input control signal while the converter is in the safe state.