Patent ID: 8640289

Claim:
An assembly comprising: a bed rest comprising a groove in a bottom surface of said bed rest; a head rest configured to be seated on a bearing retainer assembly, said head rest comprising: a housing component extending from a bottom of said head rest; and a receptacle at a center of said housing component; a base extending from said bed rest to provide support to said head rest, said base comprising: a receptacle comprising a hole; and a bed rest attachment adjacent to said receptacle, wherein said bed rest attachment engages said groove of said bed rest; said bearing retainer assembly comprising a plurality of ball bearings that facilitate a rotational movement of said head rest while said head rest is seated on said bearing retainer assembly; and a lock comprising a fastening mechanism that fastens said base and said head rest thereby fixing said bearing retainer assembly between said base and said head rest, wherein said lock engages said hole.