US Patent 7458117 Protective cover and patient security apparatus

A sheet assembly adapted to occupy a position beneath a patient and an upper surface of a patient support. The assembly has overlying upper and lower pliable sheets formed of a material of low density gradient and having central sections from which upper and lower flaps extend laterally. The lower flaps may be secured to the patient support and the upper flaps may be elevated to and maintained at a level above that of the upper surface of the patient support, thereby providing a safeguard against the patient's falling off the support surface.