Therapeutic heat cushion

• US 4,335,725 A
• Filed: 08/15/1980
• Issued: 06/22/1982
• Est. Priority Date: 08/15/1980
• Status: Expired due to Term

• Current Assignee: Barbara J. Geldmacher
• Original Assignee: Barbara J. Geldmacher
• Inventors: Geldmacher, Barbara J.
• Primary Examiner(s): Michell, Robert W.
• Assistant Examiner(s): Shedd, C. W.
• Application Number:
  US06/178,511
• Time in Patent Office: 676 Days
• Field of Search: 128/399, 219/211, 219/212, 219/527, 219/52 B, 219/549
• US Class Current: 607/96
• CPC Class Codes: A61F 7/007 characterised by electric heating
• CPC Class Codes: H05B 2203/003 using serpentine layout
• CPC Class Codes: H05B 2203/014 Heaters using resistive wires or cables not provided for in H05B3/54
• CPC Class Codes: H05B 2203/017 Manufacturing methods or apparatus for heaters
• CPC Class Codes: H05B 2203/029 Heaters specially adapted for seat warmers
• CPC Class Codes: H05B 3/36 heating conductor embedded in insulating material

Abstract

A novel portable cushion for selectively heating and supporting portions of a persons back while sitting or while riding in a car is disclosed, for therapeutic purposes and for comfort.

Claims

1. A portable unitary therapeutic heat supplying cushion adapted for use by a person in the seated position, said cushion comprising:

(a) a soft, resilient internal member having a back surface of substantially planar form for contact with the back portion of the seat or chair within which the person sits, said resilient member further having a curved front surface generally conforming to the lower back or lumbar area of the human body,

(b) a pair of panels conforming to the curvature of said front surface of said internal member;

(c) electrical heating means interposed between said pair of panels;

(d) a heat transmissive pad, of less thickness as compared to the thickness of said resilient member, covering the outer one of said pair of panels and conforming to the curvature thereof;

(e) a moisture resistant enclosure enclosing said resilient internal member, panels, electrical heating means and heat transmissive pad;

(f) a protective cover enclosing said moisture resistant closure and the contents thereof said protective cover being removable for cleaning; and

(g) a selectively controllable electrical heating circuit being connectable to a source of electrical energy and being operatively coupled to said electrical heating means.

2. The invention of claim 1 wherein said heating means comprises an electrical heating wire arranged in serpentine manner between said panels.

3. The invention of claim 1 wherein said resilient member and said heat transmissive pad are composed of plastic foam.

4. The invention of claim 1, wherein:

said electrical heating circuit is adapted for connection to direct electrical current and incorporates heat control means enabling the user to select the desired heat developed by said heating means.

5. The invention of claim 1, wherein:

said pair of panels are composed of glass fiber impregnated foil.

6. The invention of claim 1, wherein:

(a) said protective cover defines an opening along one side thereof for insertion and removal of said heat supplying cushion; and

(b) closure means being provided on said protective cover to ensure retention of said cushion therein.