Operation tables and chairs

Claim 1

A device for supporting a patient during surgical procedures comprising a base member, an upwardly extending support column fixed to the base and inclined with respect to the vertical, a movable support column reciprocably slidable within and with respect to the inclined support column, a patient-supporting platform mounted atop the movable support means for raising and lowering the movable support and the patient-supporting platform thereon along a plane inclined from the vertical, the support column having two opposite walls in parallel vertical planes and two opposite walls in parallel inclined planes, the movable support reciprocably sliding within the support column, low friction bearings between the fixed support column and the movable support column including a pressure-bearing pad and a pressure-bearing roller mounted on each of the opposing inclined walls of the support colunn, the lower of the inclined walls having the load supporting bearing roller disposed above and spaced from the bearing pad and the upper of the inclined walls having the load supporting bearing roller disposed below the bearing pad, thereby to reduce rocking movement of the movable support about the aforesaid load supporting upper bearing roller on the lower wall with respect to the support column on repeated reciprocation of the movable column with respect to the support column.

Claim 2

A device for supporting a patient during surgical procedures comprising a base member, an upwardly extending support column fixed to the base and inclined with respect to the vertical, a movable support column reciprocably slidable within and with respect to the inclined support column, a patient-supporting platform mounted atop the movable support means for raising and lowering the movable support and the patient-supporting platform thereon along a plane inclined from the vertical, the support column having two opposite walls in parallel vertical planes and two opposite walls in parallel inclined planes, the movable support reciprocably sliding within the support column, low friction bearings between the fixed support column and the movable support column including a pressure-bearing pad and a pressure-bearing roller mounted on each of the opposing inclined walls of the support colunn, the lower of the inclined walls having the load supporting bearing roller disposed above and spaced from the bearing pad and the upper of the inclined walls having the load supporting bearing roller disposed below the bearing pad, thereby to reduce rocking movement of the movable support about the aforesaid load supporting upper bearing roller on the lower wall with respect to the support column on repeated reciprocation of the movable column with respect to the support column.