Abstract: A portable orthopedic bed for the correct orthopedic support of a patient has a longitudinally adjacent array of laterally extending air inflatable chambers wherein the array has a first set of chambers and a second set of chambers. A set of chambers has a lower back supporting chamber adjacent a midpoint between the first and second sets of chambers, the lower back chamber also adjacent an upper back supporting chamber on an opposed side of the lower back supporting chamber from the midpoint, an upper foundation chamber adjacent the upper back supporting chamber on an opposed side of the upper back supporting chamber opposed to the lower back supporting chamber, wherein the upper foundation chamber is generally triangular in longitudinal cross section to thereby provide a buttressing foundation for the upper back supporting chamber.

Abstract: The stand up articulated ski described herein consists of a steerable first ski in front, a combination of steering shaft with handlebars attached to the first ski, a second ski following the first with tandem, spaced, front and rear toe cups on top, a brake attached to the tail of the second ski, pivot pin assembly joining the second ski to the steering shaft, and a coil spring on the steering shaft, interposed between the pivot pin assembly and the first ski. The pivot pin assembly consists of a case tube assembly coaxial with the steering shaft, a pair of spaced pivot pin plates, each supporting an upwardly directed pivot pin coaxial with the rotational axis integrally attached to the case tube and adapted to engage corresponding ones of a pair of pivot bearings integrally attached to a bearing fixture that is attached to the tip of the second ski.