Adjustable hospital mattress with removable inserts

• US 4,628,557 A
• Filed: 09/14/1984
• Issued: 12/16/1986
• Est. Priority Date: 09/14/1984
• Status: Expired due to Fees

• Current Assignee: Lutheran Hospital Foundation Incorporated
• Original Assignee: Lutheran Hospital Foundation Incorporated
• Inventors: Murphy, Michael E.
• Primary Examiner(s): Smith, Gary L.
• Assistant Examiner(s): TRETTEL, MICHAEL
• Application Number:
  US06/650,585
• Time in Patent Office: 823 Days
• Field of Search: 5/446, 5/462, 5/464, 5/465, 5/468, 5/481, 5/493, 297/DIG. 6, 24/306
• US Class Current: 5/723
• CPC Class Codes: A47C 27/148 of different resilience
• CPC Class Codes: A47C 27/20 with springs moulded in, or situated in cavities or openings in foamed material
• CPC Class Codes: A61G 7/05715 with modular blocks, or inserts, with layers of different material
• CPC Class Codes: Y10S 5/922 with hook and loop type fastener

Abstract

A hospital mattress which is flexible and permits head elevation and knee flexion has removably securable inserts which can be repeatedly removed or replaced and secured without requiring substantial displacement of the patient. A body of resilient material, preferably closed-cell polymer foam, is utilized to form the mattress. The portion of the foam body disposed to underlie a predetermined portion of the patient'"'"'s body, typically the patient'"'"'s trunk, is removed. A flexible, generally impervious material, such as vinyl, is utilized to cover all exterior surfaces of the foam body and inserts, and to form a floor in the cut-out section of the foam body. The inserts are cushions adapted to be received in the recess defined by the cut-out portion. Each insert cushion is made of a block of resilient material and is covered with an impervious material. Elements of respective cooperating reusable fasteners, such as Velcro fasteners, are disposed on the recess floor and on the bottom of the inserts to releasably secure each insert within the recess at a desired position.

Claims

1. In a mattress of the type comprising a main body including a cut out section disposed to underlie a patient recumbent thereon, and insert cushions adapted to be received in said cut out section, the improvement wherein said mattress further includes:

a first cover element, formed of flexible, generally impervious material, covering the exterior surfaces of said main body and forming a floor in respect of said cut out section;

second cover elements, associated with each said insert cushion, formed of flexible, generally impervious, material and covering the exterior surfaces of each of said associated insert cushions;

respective vent means, at least one associated with each of said insert cushions, for facilitating compression and re-expansion of said insert cushion;

repeatable adhesion means for releasably securing said insert cushions within said cut out section, said adhesion means comprising a first element disposed in a predetermined mesh pattern covering said floor of said cut out section and respective second elements disposed on said insert cushions, said first and second adhesion means elements being formed of respective materials which releasably interact to adhere when pressed together.

2. The mattress of claim 1 wherein one of said adhesion means elements is formed of a fibrous material, and the other formed of a synthetic material including a multiplicity of flexible barbs adapted to releasably catch in the fibrous material.

3. The mattress of claim 1 wherein said vent means comprises a screen covering with an orifice in said second cover element.

4. The mattress of claim 3 wherein said screen is disposed in the sidewall of said insert cushion and said vent means further comprises a flap of flexible, generally impervious material overlying said screen to divert soiling substances from said screen.

5. The mattress of claim 1 wherein said vent means comrpises a plug disposed in the sidewall of said insert cushion providing a passageway through said second covering, and including a projection lip to divert liquids from said passageway.

6. The mattress of claim 1 wherein said second cover element includes respective seams, and means for sealably bonding said seams, and said vent means comprise a non-sealed seam portion, said non-sealed seam portion not being sealably bonded, to thereby permit passage of air therethrough.

7. The mattress of claim 6 wherein said non-sealed seam portion is disposed at a level removed from a predetermined distance from the bottom of said insert cushion.

8. The mattress of claim 1 wherein said second adhesion element is formed of a material including a multiplicity of flexible barbs adapted to catch in fibers of said first material.

9. A mattress for receiving a recumbent patient comprising:

a main body of resilient material having a first principal surface for receiving said patient and an opposing surface, said main body including at least one cut out portion disposed to underlie a predetermined portion of said patient;

a flexible generally impervious main covering, surrounding said main body, generally conforming to the exterior shape of said main body, and extending across said cut out portion to define, in cooperation with said cut out portion, a recess of a predetermined depth with respect to said principal surface;

a first adhesion element, comprising a mesh formed of a first material of the type which releasably adheredly interacts with a second material when such first and second materials are pressed together;

said first adhesion element covering said main covering in said recess substantially completely;

a plurality of inserts of predetermined shape of a height in accordance with said predetermined depth, adapted to be received in said recess each of said inserts comprising;

an insert body of resilient material;

a generally impervious insert covering, surrounding said insert body, generally conforming to the shape of the insert body;

vent means, for permitting air to communicate through said insert covering to said insert body; and

a second adhesion element, formed of said second material, fixed to said insert covering, disposed to interact with said first adhesion element, to releasably fix said insert within said recess, the position of said insert being adjustable over a continuous range of positions over substantially the entirety of said main covering within said recess.

10. The mattress of claim 9 wherein at least one of said main covering and said insert covering is formed of vinyl.

11. The mattress of claim 10 wherein at least one of said main body and said insert body is formed of closed cell polymer foam.

12. The mattress of claim 9 wherein at least one of said main body and said insert body is formed of closed cell polymer foam.

13. The mattress of claim 9 including a recess disposed to underlie a major portion of the trunk of said patient.

14. The mattress of claim 13 wherein said recess has dimensions in the plane of said principal surface of on the order of 18 inches across and 36 inches in length, and is disposed to begin between approximately 12 to 18 inches from the head of said main body.

15. The mattress of claim 14 including a second recess disposed to underlie the feet of said patient.

16. The mattress of claim 15 wherein said second recess area has dimensions in the plane of said principal surface of on the order of 18 inches across and 12 inches in length.

17. The mattress of claim 13 including a second recess disposed to underlie the feet of said patient.

18. The mattress of claim 9 including a recess disposed to underlie the feet of said patient.

19. The mattress of claim 9, wherein said first adhesion element comprises a plurality of strips, including a first set of strips extending in the lengthwise direction of said mattress and a second set of strips extending in the widthwise direction of said mattress.

20. The mattress of claim 19, wherein said strips of said first set span opposite sides of said recess, and said strips of said second set span opposite ends of said recess.

21. In a mattress of the type comprising a body including a cut out section disposed to underlie a patient recumbent thereon, and insert cushions adapted to be received in said cut out section, the improvement wherein said mattress further includes:

a first cover element, formed of flexible, generally impervious, material, covering the exterior surfaces of said main body and forming a floor in respect of said cut out section;

second cover elements, associated with each said insert cushion, formed of flexible, generally impervious, material and covering the exterior surfaces of said associated insert cushion;

respective vent means, at least one associated with each of said insert cushions, for facilitating compression and re-expansion of said insert cushion, each of said vent means comprising a screen covering an orifice in each of said second cover elements and a flexible, generally impervious flap depending from each insert cushion and folded over said screen from above said screen to completely cover said screen, said flap being effective for preventing soiling liquids running down the side of said insert cushions from entering said insert cushion through said screen;

repeatable adhesion means for releasably securing said insert cushions within said cut out section, said adhesion means comprising a first element disposed on said floor of said cut out section and respective second elements disposed on said insert cushions, said first and second adhesion means elements being formed of respective materials which releasably interact to adhere when pressed together; and

a step disposed on each of said second cover elements for preventing said flap from obstructing air flow through said screen.

22. A mattress for receiving a recumbent patient comprising:

a main body of resilient material having a first principal surface for receiving said patient and an opposing surface, said main body including at least one cut out portion disposed to underlie a predetermined portion of said patient;

a flexible generally impervious main covering, surrounding said main body, generally conforming to the exterior shape of said main body, and extending across said cut out portion to define, in cooperation with said cut out portion, a recess of a predetermined depth with respect to said principal surface;

a first adhesion element, comprising a mesh formed of a first material of the type which releasably adheredly interacts with a second material when such first and second materials are pressed together;

said first adhesion element overlying said main covering in said recess;

a plurality of inserts of predetermined shape of a height in accordance with said predetermined depth, adapted to be received in said recess each of said inserts comprising;

an insert body of resilient material;

a generally impervious insert covering, surrounding said insert body, generally conforming to the shape of the insert body;

vent means, for permitting air to communicate through said insert covering to said insert body; and

a second adhesion element, formed of said second material, fixed to said insert covering, disposed to interact with said first adhesion element, to releasably fix said insert within said recess;

wherein said second adhesion elements each comprise a plurality of strips, and said second adhesion elements each include a first pair of parallel, spaced apart strips disposed on undersides of each of said inserts, and a second pair of parallel, spaced apart strips disposed on undersides of each of said inserts, said second pair of strips being substantially perpendicular to said first pair of strips; and

said vent means comprises a screen covering an orifice in said impervious insert covering, and said screen is centrally disposed on the underside of each of said insert cushions between the strips of said first pair and also between the strips of said second pair.