Patent ID: 8210314
Filing Date: 2012-07-03
Classification: E06C

Abstract:
1. A leg-length adjustment assembly comprising: a. an outer member comprising an inner surface and one or more openings in the wall of the outer member said opening comprising upper, lower and side edges; b. an inner tubular member disposed within said outer member wherein said inner tubular member does not come into contact with said outer member; c. a single pivotal locking member having an outer end, an inner end, said inner end terminating internal to the outer member, and a pivot point, wherein said inner tubular member passes through an elliptical hole comprising an edge in the pivotal locking member, wherein said outer end of said locking member extends through the opening of said outer member, and wherein said pivot point of the pivotal locking member is a pivot located within said outer member proximal to the upper edge of said opening; d. a spring having a first end and a second end, said first end attached at an attachment point at the inner end of said locking member and the second end attached to an attachment point located on the inner surface of the outer member; e. wherein when said outer end of said pivotal locking member is raised the spring is expanded, the pivotal locking member is pivoted on said pivot, the elliptical hole in said pivotal locking member is positioned such that it is essentially perpendicular to said inner tubular member thereby allowing said inner tubular member to freely pass through said elliptical hole of the locking member, and f. wherein when said outer end of said pivotal locking member is released, the spring contracts, the pivotal locking member is pivoted on said pivot, the elliptical hole in said locking member is positioned such that it is at an angle to said tubular member and the edges of said elliptical hole at least partially contacts said inner tubular member thereby preventing the movement of the inner tubular member through the elliptical hole of the locking member.