Height adjustable medical bed including intermediate upper and lower stop positions

A height adjustable medical bed comprising:

• a support surface for supporting a person in a supine position;
• a main frame supporting the support surface defining head and foot ends for the bed;
• support members for raisin and lowering the main frame relative to a floor surface, the support members including a head end member and a foot end member;
• the support members being supported for movement relative to the main frame whereby the support members move the main frame in vertical movement between a lowermost position and an uppermost position;
• the head end member and foot end member each including an upper end pivotally attached the main frame, and the support members being actuated in pivotal movement relative to the main frame;
• the head end member including a lower end, and roller means attached to the lower end to enable the lower end to engage a floor surface and roll relative the floor surface during vertical movement of the main frame;
• the foot end member including a lower end, and a frictional engaging surface at the lower end of the foot end member for en aging the floor surface at a substantially stationary position during vertical movement of the main frame;
• the lower end of the foot end member further including a roller engaging surface, the roller engaging surface moving into rolling engagement with the floor surface and the frictional engaging surface moving out of engagement with the floor surface as the main frame approaches the uppermost position;
• and
• wherein upward movement of the main frame is automatically terminated at an intermediate position during upward movement of the main frame and prior to reaching the uppermost position, the intermediate position being defined prior to the roller engaging surface moving into rolling engagement with the floor surface.

A height adjustable medical bed comprising:

• a support surface for supporting a person in a supine position;
• a main frame supporting the support surface defining head and foot ends for the bed;
• support members for raisin and lowering the main frame relative to a floor surface, the support members including a head end member and a foot end member;
• drive means connected to the support members for actuating the support members in movement relative to the main frame whereby the support members move the main frame in vertical movement between a lowermost position and an uppermost position;
• the head end member and foot end member each including an upper end pivotally attached the main frame wherein the drive means actuates the support members in pivotal movement relative to the main frame;
• the head end member including a lower end, and roller means attached to the lower end to enable the lower end to engage a floor surface and roll relative the floor surface during vertical movement of the main frame;
• the foot end member including a lower end, and a frictional engaging surface at the lower end of the foot end member for en aging the floor surface at a substantially stationary position during vertical movement of the am frame;
• a control system comprising operator actuated switches for controlling the drive means in upward and downward movement to the lowermost and the uppermost positions;
• a sensor for sensing a lower intermediate position of the main frame adjacent to and spaced above the lowermost position on whereby the control system automatically terminates movement of the main frame at the lower intermediate position without operator intervention;
• the sensor additionally sensing an upper intermediate position of the main frame adjacent to and spaced below the uppermost position whereby the control system automatically terminates movement of the main frame at the intermediate position without operator intervention.