A stem load determining system comprises a method and apparatus for determining the load developed on a threaded stem, including a valve stem driven by a valve operator. An integral component of the apparatus is a stem strain transducer uniquely designed to girp a threaded stem to define a guage...http://www.google.com/patents/USRE35918?utm_source=gb-gplus-sharePatent USRE35918 - Stem load determining system
