Sequentially deployable maneuverable tetrahedral beam

Abstract

The invention relates to a tetrahedral beam that can be compactly stowed, sequentially deployed, and widely manipulated to provide a structurally sound yet highly maneuverable truss structure. The present beam is comprised of a plurality of repeating units comprised of tandem tetrahedra sharing common sides. Tetrahedra are comprised of fixed length battens 12 joined by joint 14 into equilateral triangles called batten frames. Apexes of adjacent triangles are interconnected by longerons 16 having mid-point folding hinges 20. Joints 14 are comprised of gussets 24,34 pivotably connected by links 25. Joints 14 permit two independent degrees of rotational freedom between joined adjacent batten frames, and provide a stable structure throughout all stages of beam deployment, from packaged configuration to complete deployment. The longerons and joints can be actuated in any sequence, independently of one another. The present beam is well suited to remote actuation. Longerons 16 may be provided with powered mid-point hinges 20a enabling beam erection and packaging under remote control. Providing one or more longerons 16 with powered telescoping segments 16a permits the shape of the beam central axis to be remotely manipulated so that the beam may function as a remote manipulate arm.

Dependencies are inferred from the claim text.