Importance

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Abstract

Helical thruster having a housing, a piston movable axially within the housing between retracted and extended positions, and an output member rotatively mounted on the housing. Pressurized fluid is applied to the piston to drive the piston from the retracted position toward the extended position, and the output member rotates as the piston travels toward the extended position. In one disclosed embodiment, the piston is non-rotating, and a helical driving connection between the piston and the output member imparts rotation to the output member as the piston travels toward the extended position. In another disclosed embodiment, the piston rotates as it travels toward the extended position, and the output member rotates with the piston.

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First Claim