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:
May. 20, 1986
Filed:
Jul. 26, 1984
Boris Elpiner, Northbrook, IL (US);
Mark Controls Corporation, Evanston, IL (US);
Abstract
A method and apparatus for controlling the flow variables of a control system by sensing selected pneumatic parameters while operating the control system within maximum power consumption constraints. The control system includes a processor for selecting a first flow valve for movement during one duty cycle in one selected direction. The processor then selects for operation additional numbers of flow valves less than the maximum number of valves, drives the valves in the same direction as the first valve for the remainder of the duty cycle. The number of additional flow valves operated in any given duty cycle is determined by maximum power constraints. Calibration of each of the flow valves is accomplished driving each valve to an end point using less than the normal number of power phases to reduce the torque applied to the valve mechanism.