Patient positioning support structure

An apparatus for supporting a patient during a medical procedure supported on a floor, the apparatus comprising:

• a. a first patient holding structure;
• b. a second patient holding structure hingedly attached to the first patient holding structure by a pair of spaced opposed hinges, so as to form a frame for orienting the patient;
• c. a first connector joining the first patient holding structure;
• d. a second connector joining the second patient holding structure;
• e. a first upright column support subassembly linked to the first connector and including a first base member and a first upright column support subassembly extending from and joined to the first base member;
• f. a second upright column support subassembly linked to the second connector and including a second base member and a second upright column support subassembly extending from and joined to the second base member;
• g. an angulation subassembly linked to each of the first and second connectors, the angulation subassembly comprising:
• i. a pair of spaced opposed lift arms, each of the lift arms having a proximal portion linked to the respective frame by a ball fitting and a distal portion linked to the respective upright column support subassembly by a universal joint;
• wherein
• ii. actuation of the lift arms angulates the respective connector;
• and
• h. a controller, the controller actuating the degree of angulation of the connectors so as to actuate angulation of the spaced opposed hinges.