Reducing spring load prior to maintenance on an actuator
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United States of America Patent
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Feb 5, 2019
Grant Date -
May 31, 2018
app pub date -
Nov 27, 2016
filing date -
Nov 27, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
A safety device that is useful to release load on a spring found in an actuator. In one embodiment, the actuator can have a housing comprising a pair of housing members and a fastening device coupling the pair of housing members to one another. The embodiment can also have an output shaft extending longitudinally in the housing, the output shaft having an end configured to couple with a process device. The embodiment may also have a spring coupled with the output shaft. The embodiment can further have a safety device coupled to the spring and configured to operate to reduce loading of the spring from a first load to a second load. In one example, the safety device is in position to prevent access to the fastening device at the first load and to allow access to the fastening device at the second load so that the pair of housing members can separate to allow access to the spring in the housing.
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