Bed systems and methods

1. A bed adapted to be supported on a floor, comprising:

a plurality of wheels;

a headboard and a footboard, the footboard spaced apart from the headboard, the headboard and the footboard supported by the plurality of wheels;

a support deck supported by the plurality of wheels, the support deck including a head end positioned proximate the headboard and a foot end positioned proximate the footboard, and at least one support surface extending between the head end of the support deck and the foot end of the support deck;

a first lift system supported by the plurality of wheels, the first lift system operatively coupled to the support deck to raise and lower the support deck relative to the plurality of wheels while the plurality of wheels remain stationary; and

a second lift system supported by the plurality of wheels, the second lift system operatively coupled to the support deck to raise and lower the support deck relative to the plurality of wheels while the plurality of wheels remain stationary, the second lift system including a lower frame, an upper frame, and a lifting assembly coupled to the lower frame and the upper frame, the second lift system being moveable from an unexpanded configuration wherein the lower frame and the upper frame are separated by a first separation to a first expanded configuration wherein the lower frame and the upper frame are separated by a second separation due to a downward movement of the lower frame relative to the plurality of wheels and a second expanded configuration due to an upward movement of the upper frame relative to the plurality of wheels.

2. The bed of claim 1 , wherein the first lift system is operatively coupled to the second lift system to raise and lower the second lift system relative to the plurality of wheels while the plurality of wheels remain stationary.

3. The bed of claim 1 , wherein the first lift system is further configured to raise and lower at least one of the head end of the support deck and the foot end of the support deck independent of the other of the head end of the support deck and the foot end of the support deck and the second lift system is further configured to raise and lower at least one of the head end of the support deck and the foot end of the support deck independent of the other of the head end of the support deck and the foot end of the support deck.

4. The bed of claim 1 , wherein the first lift system does not alter a position of the support deck relative to the second lift system as the first lift system raises or lowers the second lift system relative to the plurality of wheels.

5. The bed of claim 1 , wherein the plurality of wheels define a horizontally extending envelope and wherein when viewed from a top view, both of the first lift system and the second lift system are positioned within the horizontally extending envelope defined by the plurality of wheels.

6. The bed of claim 1 , wherein the second lift system is configured to raise and lower the support deck independently of the first lift system.

7. The bed of claim 1 , wherein the second lift system is supported by the first lift system through a plurality of load cells.

8. The bed of claim 7 , wherein the upper frame of the second lift system is supported by the lower frame of the second lift system and the lower frame of the second lift system is moveably coupled to the plurality of load cells through a plurality of elongated members.

9. The bed of claim 7 , wherein the plurality of loads cells supports the second lift system through the upper frame of the second lift system when the second lift system is in the unexpanded configuration and the first expanded configuration and wherein the plurality of load cells supports the second lift system through the lower frame of the second lift system when the second lift system is in the second expanded configuration.