Self deploying axial drive actuator
AssigneeLockheed Martin Corporation
InventorsRichard R. Hall, Stanley M. Granat
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Abstract
An actuator device comprises a compact housing including an extendable corrugated column comprising: a horizontal helical band; a vertical sidewall band having a plurality of hinged segments; and a resilient retaining band; wherein the hinged segmented vertical band includes a first group of segments having tabs defined at longitudinal ends of the first group of segments, the tabs configured to overlap and engage an outer edge of the horizontal helical band, and a second set of segments positioned between adjacent tabbed segments of the first group of segments, the second set of segments configured to define corrugations between adjacent tabbed segments in the first group of segments.
Claims12
A linear actuator comprising:
- an extendable column comprising:
- a first annular helical band configured about a central axis with turns of said helical band being transversely normal to said central axis, said first annular helical band being stored in a stacked configuration when said extendable column is in a non-deployed state, and successive turns of said first annular helical band being spaced apart from one another in a deployed state;
- and
- a second spiral coil band transversely parallel to said central axis and comprising a plurality of hinged segments, said spiral coil band being wound on itself in a non-deployed state and forming a helical tube in a deployed stated, turns of said helical tube cooperating with spaced turns of said first annular helical band to form the extendable column, said plurality of hinged segments including a plurality of tabbed segments having a tab extending from each longitudinal end of said tabbed segment;
- and at least two non-tabbed segments disposed between adjacent tabbed segments, said tabbed segments configured to span the space between successive turns of the first annular helical band with said tabs overlapping the outermost edges of said first annular band and said at least two non-tabbed segments being angled with respect to each other and to said adjacent tabbed segments, the hinge between said at least two non-tabbed segments being directed inward toward said central axis to define a corrugated profile in a side wall of said extendable column defined by said second band.
Dependencies are inferred from the claim text.