Hydraulic controls for ambulatory care chair

The present invention relates to a wheeled chair for use in a hospital or other health care facility, and particularly to an ambulatory care chair that converts between a chair and a table. More particularly, the present invention relates to a wheeled hospital chair having articulated patient-support sections that move relative to one another between a generally upright position and a generally horizontal table position and that can be tilted and elevated so that a patient can rest and be transported in the chair. The chair can be converted to a table for supporting the patient during medical procedures without having to transfer the patient between separate chairs and tables. The extension and retraction of the leg section of the chair and the hi-lo adjustment of the chair are accomplished using the same actuator for actuating drive mechanisms. A chair for supporting a patient includes a base frame including a staging frame and a lower frame. The staging frame is mounted for vertical movement relative to the lower frame. An intermediate frame is coupled to the base frame for pivoting movement relative to the base frame about a generally horizontal transverse axis. An articulated patient support is mounted to the intermediate frame. The patient support includes longitudinally spaced back, seat, and leg sections mounted to the intermediate frame for movement relative to one another and relative to the intermediate fame. The back, seat and leg sections are movable relative to the base tame about the horizontal transverse axis. A hydraulic system includes a first hydraulic cylinder actuating vertical movement of the staging frame relative to the lower frame, a second hydraulic cylinder actuating movement of the leg section relative to the seat section, and a pump actuating both the first and second hydraulic cylinders.