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1. (WO2016077814) LEAK-FREE RISING STEM VALVE WITH BALL SCREW ACTUATOR

Pub. No.:    WO/2016/077814    International Application No.:    PCT/US2015/060787
Publication Date: Fri May 20 01:59:59 CEST 2016 International Filing Date: Tue Nov 17 00:59:59 CET 2015
IPC: F16K 31/08
Applicants: BIG HORN VALVE, INC.
Inventors: BURGESS, Kevin
YAKOS, David
WALKER, Ross
Title: LEAK-FREE RISING STEM VALVE WITH BALL SCREW ACTUATOR
Abstract:
A rising stem valve with a magnetic actuator having an outer and an inner magnet assembly that are magnetically coupled to each other so that the inner and outer magnet assemblies rotate together and a ball screw that is connected to the rising stem valve and that converts rotary to reciprocal motion. The inner magnetic cartridge assembly and valve body comprise a sealed lower section that is completely sealed to the outside environment.