Arrangement for the controllable operation of valves
Patent 4256065 Issued on March 17, 1981. Estimated Expiration Date: 
December 4, 1998. 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 4, 1998. 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 References 2253716 2824460 3258985 3640140 3856042 3882833 Valve actuator mechanism Modulating failsafe valve actuator using differential gearing Patent #: 4114465 InventorAssigneeApplicationNo. 05/966212 filed on 12/04/1978US Classes:123/90.11, Electrical system74/57, Grooved74/89.37Limit stopExaminersPrimary: Rosenthal, ArnoldAttorney, Agent or FirmInternational ClassF01L 9/04 (20060101)Foreign Application Priority Data1977-12-08 DEAbstractArrangement for the controllable operation of valves, including mechanically cooperating elements powered by external energy and acting on the valve. An electromagnetic control device produces a positive force interengagement of the mechanical elements so as to effect the actuation of the valve.Field of SearchElectrical system | |
