Shell USA, Inc.

Shell Internationale Research Maatschappij, B.v.

Folkert Hettinga

Alfred Arnold Kruijer

Willem George Sied Van Rijs

Peter Van Der Wagt

Willem Van Rijs

A safety device for detachably locking the output member of a linear drive has a coupling rod that can be coupled with the output element of the linear drive. A blocking unit is linearly movably penetrated by the coupling rod that is relatively movable with respect to the housing between a locking position blocking the stroke of the coupling rod and a release position enabling the linear movement of the coupling rod. A spring device prestresses the blocking unit in the blocking position and a locking device locks the blocking unit in the release position. The locking device has locking rolling elements in the housing and a support sleeve that is linearly movably penetrated by the coupling rod. When energized, an electromagnet device holds the support sleeve in the support position against the recoil force of at least one trigger spring of a trigger spring device.

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Delft, Netherlands

Folkert Hettinga