专利名称：Apparatus for safely installing and removing
spring failsafe actuator
发明人：Ma, Weijian,Silva, Gabriel申请号：EP00420196.8申请日：20000926公开号：EP1101985A2公开日：20010523
专利附图：
摘要：Apparatus for safely installing and removing spring loaded failsafe valveactuators. The apparatus includes a frame (20) that retains a compression spring (45) in aloaded condition between a cover plate (50) fastened to the top wall (22) of the frame
and a spring seat (35) slidably contained inside the frame. The spring seat is attached tothe valve stem (17) for moving reciprocally therewith between a closed and an openposition. The stem is connected to the extendable rod of a remotely controlled actuator(60) that is mounted in the cover plate and arranged to move the stem between theclosed and open positions. In the event the actuator fails while the valve is in an openposition, the compressed failsafe spring is released to rapidly close the valve.
申请人：Young & Franklin, Inc.
地址：942 Old Liverpool Road Liverpool, NY 13088 US
国籍：US
代理机构：Vuillermoz, Bruno
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