Wireless, intrinsically safe valve
June 25, 2021. 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 ReferencesValve arrangement for controlling a reversible hydraulically operated device Rotary valve Programmable computer controlled reaction injection mixing head system Push-button operated electrical power source for an optical communication link Optical digital servo control system Method for maximizing the solar cell OPTO-electronic conversion efficiency in optically controlled hydraulic actuators Inflation control system Multi-orifice plate carrier and fitting with positioner, differential selector and horizontal adjusting bar Optically controlled actuator Piezoelectric ceramic composition InventorAssigneeApplicationNo. 891487 filed on 06/25/2001US Classes:251/59, Rotary or oscillatory motor251/29, With additional pilot valve control251/129.04, Remote or follow-up control system for electrical actuator251/129.06Having element dimensionally responsive to fieldExaminersPrimary: Mancene, GeneAssistant: Buechner, Patrick Attorney, Agent or FirmInternational ClassF16K 031/02AbstractA valve system (10) that employs a piezo-electric element (38) to activate a fluid flow valve (18) so as to use a minimal amount of electrical energy. The piezo-electric element (38) activates a pilot pressure valve (36), which allows a control fluid to pass to a main control valve (44). The control fluid causes the main control valve (44) to activate a working element (16), which in turn operates the fluid flow valve (18). A switching assembly (70) is employed to activate the piezo-electric element (38). The switching assembly (70) can include various types of switching devices, such as RF switching devices, optical switching devices, infrared switching devices and low voltage electrical switching devices. | |
