Shear stress control in body support pads

• US 5,127,119 A
• Filed: 03/14/1991
• Issued: 07/07/1992
• Est. Priority Date: 10/29/1990
• Status: Expired due to Term

• Current Assignee: Foamex LP (FXI Holdings Incorporated)
• Original Assignee: John E. Rogers
• Inventors: Rogers, John E.
• Primary Examiner(s): Nicholson, Eric K.
• Application Number:
  US07/669,874
• Time in Patent Office: 481 Days
• Field of Search: 5/464, 5/481, 5/470, 5/471, 5/473, 5/468, 5/465, 5/474
• US Class Current: 5/730
• CPC Class Codes: A47C 27/144 inside the mattress or cushion
• CPC Class Codes: A47C 27/146 on the outside surface of the mattress or cushion
• CPC Class Codes: A47C 27/148 of different resilience
• CPC Class Codes: A47C 27/15 consisting of two or more layers A47C27/16 takes precedence
• CPC Class Codes: A47C 31/123 for beds or mattresses
• CPC Class Codes: A61G 7/05715 with modular blocks, or inserts, with layers of different material
• CPC Class Codes: Y10S 5/923 Bedclothing

Abstract

A modular body support system that includes a foam support frame with foam inserts within the frame to provide optimal body support configuration regardless of where it is used. The inserts include slits through at least a part of the insert as well as at least one vertical cavity passing therethrough. The slits extend only partially through the pad and are surrounding and spaced from the cavity to offer additional flexibility to the wall of the cavity.

Claims

1. A body support pad for a bed ridden patient, the pad being of a resilient synthetic foam or the like, said pad having a generally rectangular top surface with two sides and two ends, at least one vertical cavity open at said top surface and extending completely through said pad, and a plurality of cuts generally parallel to the edge of the cavity opening at said top surface in said top surface but extending only partially through said pad, said cuts surrounding and spaced from said cavity to offer additional flexibility to the wall of said cavity, whereby with a patient'"'"'s body resting thereon said wall at said top surface will tend to roll into said cavity thereby to reduce shear stress and damage to body tissue lying against said top surface in the area of said cavity.

2. The support pad of claim 1 wherein there are a plurality of said vertical cavities in said pad and a plurality of said cuts surrounding each of said cavities.

3. The pad of claim 1 wherein said cavity is generally cylindrical.

4. The pad of claim 3 wherein said plurality of cuts includes a plurality of arcuate cuts arranged generally concentrically with said cavity.

5. The pad of claim 3 wherein said plurality of cuts further comprises linear cuts extending between but terminating short of said sides, at least one said straight cut lying between said cavity and each said end.

6. A body support pad of claim 1 further comprising a rectangular frame of flexible synthetic foam defining two parallel side walls and two parallel end walls, said frame having a frame top surface, and insert means of synthetic foam contained in said frame and defining said top surface, said insert means characterized in that the synthetic foam thereof is of greater resiliency than the synthetic foam of said frame.

14. The pad of claim 6 wherein each said insert means comprises a plurality of insert elements each having an insert top surface and wherein at least one said insert top surface is spaced below the insert top surface of other insert elements in said plurality to provide pressure relief to selected portions of a patient'"'"'s anatomy.

7. A body support pad comprising a rectangular frame of flexible synthetic foam defining two parallel side walls and two parallel end walls, said frame having a frame top surface, and insert means of synthetic foam contained in said frame and defining an insert top surface, said insert means characterized in that the synthetic foam thereof is of greater resiliency than the synthetic foam of said frame;

and

at least one vertical cavity in said insert means with a circular opening at said insert top surface and extending completely through said pad, and one or more generally arcuate cuts in said insert top surface but extending only partially through said pad, said cuts being generally concentric with and surrounding said cavity to offer additional flexibility to the wall of said cavity, whereby with a patient'"'"'s body resting thereon said wall at said top surface will tend to roll into said cavity thereby to reduce shear stress and damage to body tissue lying against said top surface in the area of said cavity.

8. The pad of claim 7 wherein said plurality of cuts further comprises linear cuts extending between but terminating short of said sides, at least one said straight cut lying between said cavity and each said end.

9. The support pad of claim 7 wherein there are a plurality of said vertical cavities in said pad and a plurality of said cuts surrounding each of said cavities.

10. The pad of claim 7 wherein said cavity is generally cylindrical.

11. The pad of claim 7 further comprising a plurality of parallel cross cuts extending across said insert top surface, and a plurality of parallel opposite cuts extending normal to set parallel cross cuts, said cuts extending into said pad forming vertical quadrilateral columns, each of said cuts stopping short of intercepting a cut normal thereto and forming a vertical web at the corners of said vertical quadrilateral columns extending downwardly and terminating at the terminus of said cuts, whereby said columns each have limited individual compression and contour movements under the weight of a patient'"'"'s body thereon, yet movable as an integrated unit so that said insert top surface will rotate normal to the load applied.

12. The pad of claim 7 wherein said insert means comprise a plurality of rectangular insert elements together defining said insert top surface, each insert element extending between said side walls in said frame, at least two of said insert elements having different top surface characteristics adapted to the support requirements of different portions of the anatomy of a patient lying on said insert top surface.

13. The pad of claim 7 wherein said insert means comprise at least three insert elements supported between said side walls, characterized in that two of said least three insert elements are substantially similar to each other and are separated by a third insert element of substantially different construction.

15. The pad of claim 7 wherein each said insert means comprises a plurality of insert elements each having an insert top surface and wherein at least one said insert top surface is spaced below the insert top surface of other insert elements in said plurality to provide pressure relief to selected portions of a patient'"'"'s anatomy.