Patent ID: 7232103
Filing Date: 2007-06-19
Classification: E21D

Abstract:
1. A load-bearing column apparatus configured to support a load with respect to a support surface, the apparatus comprising: a) a base configured to abut the support surface; b) a cap configured to abut the load; c) an elongated, flexible sleeve extending between the cap and the base to form an enclosure configured to extend to and between the load and the support; d) a bladder, disposed in the enclosure configured to selectively receive an incompressible liquid; e) the elongated, flexible sleeve having at least two configurations, including: f) the cap or the base including a pair of plates including an outer plate and an inner plate; g) an annular groove, formed between the outer plate and the inner plate; and h) a ring, disposed in the annular groove between the outer plate and the inner plate, an end of the sleeve extending around the ring.