Patent ID: 8646132

Claim:
A bed, comprising: a bed frame structure further comprising an upper frame rail assembly, a lower frame rail assembly, a “U”-shaped foot board assembly affixed to each foot end of said upper frame rail assembly and said lower frame rail assembly, and a “U”-shaped head board assembly affixed to each head end of said upper frame rail assembly and said lower frame rail assembly, wherein: said upper frame rail assembly further comprises a unitary rectangular structure having a plurality of affixed parallel support members spanning across a top surface in a coplanar fashion between a pair of upper side rail frame members; and said lower frame rail assembly further comprises a unitary rectangular structure generally identical in dimension to said upper frame rail assembly, having a pair of side rail members, a foot board rail member, and a head board rail member; an adjustable height mechanism for incrementally adjusting said upper frame rail assembly relative to said lower frame rail assembly, further comprising: a locking collar affixed to each corner area of said upper frame rail assembly and said lower frame rail assembly at an attachment point to each said foot board assembly and said head board assembly; and, a securing fastener for fastening each of said locking collar at a desired position; a lifting mechanism affixed to said bed frame structure; a mobile frame assembly adjustably connected to said lifting mechanism and disposed between said upper frame rail assembly and said lower frame rail assembly; and, a mattress assembly supported on said mobile frame assembly; wherein said lifting mechanism raises and lowers said mattress assembly synchronous with said mobile frame assembly; wherein an occupant on said bed can be retained on said upper frame rail assembly when said mobile frame assembly is lowered; wherein said mobile frame assembly is horizontally motioned relative to said bed frame structure; and, wherein bed linen on said mattress assembly can be changed without having an occupant vacate said bed frame structure when said mobile frame assembly is horizontally motioned away from said bed frame structure.