Safety device for use with portable heater

• US 5,568,805 A
• Filed: 07/26/1995
• Issued: 10/29/1996
• Est. Priority Date: 05/01/1992
• Status: Expired due to Fees

• Current Assignee: Tokai Corporation
• Original Assignee: Tokai Corporation
• Inventors: Serizawa, Noriyuki, Seki, Masato, Mifune, Hideo, Kaga, Yosimitu, Nitta, Tomio
• Primary Examiner(s): Price, Carl D.
• Application Number:
  US08/506,896
• Time in Patent Office: 461 Days
• Field of Search: 126/262, 431/88, 431/75, 431/6, 431/13
• US Class Current: 126/262
• CPC Class Codes: A47J 36/26 Devices for warming vessels containing drinks or food, especially by means of burners Warming devices with a burner, e.g. using gasoline; Travelling cookers, e.g. using petroleum or gasoline with one burner
• CPC Class Codes: A47J 36/30 Devices for warming by making use of burning cartridges or other chemical substances
• CPC Class Codes: B41J 3/407 for marking on special material
• CPC Class Codes: B65D 17/4012 for opening partially by means of a tearing tab
• CPC Class Codes: B65D 81/3484 Packages having self-contained heating means, e.g. heating generated by the reaction of two chemicals warming devices A47J36/24

Abstract

A portable heater includes a burner 10 disposed on the bottom of a combustion cylinder 2, a container to be heated 6 which is disposed in an upper part of the combustion cylinder for storing contents which are heated when the heater is in use, a fuel tank 12 for storing fuel gas to be supplied to the burner, and an ignition means 8 having an ignition lever 21 which causes the ignition of the burner. For use with such a portable heater, a safety device for preventing the container from being heated while it is sealed, a safety device which prevents the emission of gas when flames are unexpectedly extinguished, and an overturn safety device for automatically extinguishing flames when the heater is overturned are obtained in a simple structure.

Claims

1. A portable heater having a safety device comprising a combustion cylinder, a burner disposed at a bottom of the combustion cylinder, a container to be heated which is disposed in an upper part of the combustion cylinder for storing contents to be heated when the heater is in use, a fuel tank for storing fuel gas to be supplied to the burner, an ignition means having an igniter and an ignition lever for actuating the igniter which causes the ignition of fuel in the burner, a bimetal member which is deformed upon sensing a rise in temperature as a result of combustion in the burner;

a regulation member that moves in accordance with thermal deformation of the bimetal member as a result of combustion in the burner and is engaged with a part of the ignition lever, thereby regulating return movement of the ignition lever, and that allows the movement of the ignition lever when the burner is in an extinguished state; and

a flame extinguishing operation member that causes the regulation member when engaged with the ignition lever to be displaced in a disengaging direction with respect to the ignition lever.

2. A portable heater as defined in claim 1, wherein a heat-sensitive part that transmits combustion heat of the burner is connected to the bimetal member.

3. A portable heater as defined in claim 1, wherein a link mechanism is disposed which switches an indication of a combustion display section in response to the deformation of the bimetal member.

4. A portable heater having a safety device comprising a combustion cylinder, a burner disposed at a bottom of a combustion cylinder, a container to be heated which is disposed in an upper part of the combustion cylinder for storing contents which are heated when the heater is in use, a fuel tank for storing fuel gas to be supplied to the burner, an ignition means having an igniter and an ignition lever for actuating the igniter to ignite gas in the burner, and a hole-opening lever that moves in conjunction with the ignition lever and also automatically bores an exhaust hole for vapor or the like in an upper part of the container body, a valve mechanism having a nozzle that opens and closes the supply of gas to the burner and a needle valve that opens and closes the supply of gas to the nozzle;

wherein the ignition lever operates a nozzle casing which opens and closes the needle valve and wherein the nozzle is closed when the heater is overturned or extinguished.