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US 8,707,810 B2Granted
Leadscrew drive with annular-shell leadscrew
AssigneeRaytheon Canada Limited
InventorGabor Devenyi
Life of this patent
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Abstract
A leadscrew drive has a leadscrew follower, and a leadscrew. The leadscrew is formed as an elongated annular leadscrew shell having a thread-form outer surface. The leadscrew may be fabricated by depositing a leadscrew-shell material, such as nickel, onto a mandrel having a thread-form outer surface, so that the thread-form outer surface of the mandrel is replicated in an outer surface of the leadscrew-shell material. The mandrel may be removed, to leave a hollow leadscrew shell, or left in place.
Claims13
A leadscrew drive comprising:
- a leadscrew follower;
- and
- an elongated flexible tubular leadscrew shaft comprising:
- an internal core support comprising a helical wire;
- and
- a leadscrew shell supported on the internal core support and including an outer surface having a helical thread-form,
- wherein the leadscrew shaft engages the leadscrew follower and extends through the leadscrew follower to an end of the leadscrew shaft that is rotationally driveable by a motor and spaced apart from the leadscrew follower along a longitudinal axis of the leadscrew shaft, and
- wherein a thickness of the leadscrew shell including the helical thread-form is substantially constant along a length of the leadscrew shell having the helical thread-form.
5 more elements
Dependencies are inferred from the claim text.