Patent ID: 6868567

Claim:
A height adjustable bed comprising: a bed frame including a head portion and a foot portion; a first articulated support pivotably connected to the head portion of the bed frame, and a second articulated support pivotably connected to the foot portion of the bed frame, the first and second articulated supports each comprising an upper support joined articulatedly to a lower support; a first sliding hinge and a second sliding hinge each comprising at least one arcuate slot and at least one pin retained in the slot, the at least one pin of each of the first sliding hinge and the second sliding hinge being connected to the lower supports of the first articulated support and the second articulated support, respectively, such that the at least one pin is capable of translating and pivoting; a first wheeled base connected to the lower support of the first articulated support by the first sliding hinge; a second wheeled base connected to the lower support of the second articulated support by the second sliding hinge; a linkage member pivotably connected on one end to the first articulated support and on the other end to the second articulated support; a linear actuator having a first end and a second end, pivotably connected on the first end to the linkage member, the linear actuator being capable of extension and retraction; and an actuating frame pivotably connected to the second end of the linear actuator and pivotably connected to the first articulated support at a first fulcrum point and the second articulated support at a second fulcrum point, wherein extension and retraction of the linear actuator raises and lowers the bed frame and during raising and lowering the at least one pin of each of the first sliding hinge and the second sliding hinge in one range of intermediate positions, is translating and in another range of intermediate positions, is not translating.