Electrical measured value processing for a control valve
Patent 4970941 Issued on November 20, 1990. Estimated Expiration Date: 
December 14, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 14, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesHydraulic actuator controls Electrohydraulic control system Power transmission Control circuit for proportional electro-hydraulic fluid control valves Control system for injection molding machine Patent #: 4798527 InventorAssigneeApplicationNo. 449041 filed on 12/14/1989US Classes:91/433, Both inlet and exhaust controlled by motive fluid pressure in supply line or chamber91/459, Electrically operated (275) (361)137/625.64, Electric137/625.65, Motor-operated137/884Sectional block structureExaminersPrimary: Michalsky, Gerald A.Attorney, Agent or FirmForeign Patent References
International ClassF15B 013/044Foreign Application Priority Data1987-10-15 DEAbstractFor detecting the pressures occurring at a control valve pressure pickup cells are provided and for processing the pressure measuring signals evaluating electronics are provided which together with the pressure pickup cells is arranged on an intermediate plate associated with the control valve. With this arrangement signals may be formed which monitor and control the mode of operation of the consumer governed by the control valve. By arranging the components necessary for the control circuit on the intermediate plate a standardized design is made possible in which the constructional expenditure is greatly reduced. | |
