Portable Heating Pad

• US 20110061839A1
• Filed: 09/17/2009
• Published: 03/17/2011
• Est. Priority Date: 09/17/2009
• Status: Active Grant

• Current Assignee: Ryan R. Munson
• Original Assignee: Ryan R. Munson
• Inventors: Munson, Ryan R.
• Granted Patent: US 8,528,833 B2
• Time in Patent Office: Days
• US Class Current: 165/104.19
• CPC Class Codes: A61F 2007/0054 with a closed fluid circuit, e.g. hot water
• CPC Class Codes: A61F 7/0085 Devices for generating hot or cold treatment fluids
• CPC Class Codes: A61F 7/02 Compresses or poultices for effecting heating or cooling
• CPC Class Codes: F28D 1/0226 with an intermediate heat-transfer medium, e.g. thermosiphon radiators

Abstract

A portable heating system used to heat a person while in cold environments. A heating unit containing a fuel combustion chamber and a heat exchanger oxidizes a fuel to produce heat. The heat from the oxidation process is transferred to the fluid using the heat exchanger. The fluid either boils or simply becomes less dense then cooler fluid in the heat exchanger and thus more buoyant. Convection moves the heated fluid upwards in to a thin bladder encapsulating the fluid and held against a person. The elevated kinetic energy in the bladder creates an entropy differential to the person. This differential allows the kinetic energy in the bladder to flow to the person thus warming them. The fluid now having less energy, now denser, flows back down the bladder to the heating unit by gravity.

Claims

1. A passive flow portable heating system comprising:

a combustion powered heating unit;

a heat transfer fluid;

a pliant bladder built in thermosiphon configuration and in closed loop thermal circuit with said heating unit using said fluid as transfer medium.

2. The portable heating system of claim 1, further comprising a fluid flow rate regulator.