Patent ID: 9693920
Date: 2017-07-04
CPC Classifications: A61G

Claim:
1. A system for use with a bed having a frame and a supporting surface supported by the frame, the system comprising: a sheet having a bottom surface configured to be placed above the supporting surface of the bed and a top surface opposite the bottom surface, the sheet having a sheet engagement member positioned on the bottom surface; and a wedge comprising a wedge body having a base wall, a ramp surface, and a back wall, the ramp surface joined to the base wall to form an apex, wherein the ramp surface has a first and a second ramp engagement member; wherein the wedge is configured to be positioned under the sheet such that the base wall confronts the supporting surface of the bed and the ramp surface confronts the bottom surface of the sheet, wherein the first ramp engagement member is configured to engage the sheet engagement member to form a selective gliding assembly that resists movement of the sheet with respect to the ramp surface in a first direction, such that a first pull force necessary to create sliding movement of the sheet with respect to the ramp surface in the first direction is greater compared to a second pull force necessary to create sliding movement of the sheet with respect to the ramp surface in a second direction that is different from the first direction; and wherein the second ramp engagement member is configured to engage the sheet engagement member to further form the selective gliding assembly to resist movement of the sheet with respect to the ramp surface in a third direction different from the first and second directions, such that a third pull force necessary to create sliding movement of the sheet with respect to the ramp surface in the third direction is greater compared to the second pull force.