Hdt Expeditionary Systems, Inc.

Thad B Ribner

An articulating frame for a shelter includes a plurality of struts pivotally connected to each other to define a skeletal structure that is adapted to be articulated between a folded condition and an erected condition. The skeletal structure in the erected condition includes a segmented arch that defines an interior space. The skeletal structure is adapted to support an associated outer shell covering. The frame includes at least one double-scissor linkage segment including four of the plurality of struts. The four struts include: (i) first and second struts each with opposite inner and outer ends, the first and second struts bring pivotally connected to each other at a first pivot point located between their respective inner and outer ends; and, (ii) third and fourth struts each with opposite inner and outer ends, the third and fourth struts being pivotally connected to each other at a second pivot point located between their respective inner and outer ends. The inner end of the first strut is pivotally connected to the inner end of the third strut at a third pivot point and the inner end of the second strut is pivotally connected to the inner end of the fourth strut at a fourth pivot point such that a four-bar parallelogram accommodating linkage is defined by the four struts between the first pivot point, the second pivot point, the third pivot point, and the fourth pivot point.

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Fredericksburg, VA, United States of America

Thad B Ribner