Safety tip-over device for portable gas-fired infrared radiant heater

Claim 1

A safety tip-over device for a portable gas-fired radiant heater including a container for burnable gas under pressure having a burner mounted thereon, said device comprising an orifice structure mounted on the container for emitting burnable gas into the burner, said orifice structure including a passageway having a first portion of relatively large diameter and terminating in a restricted portion having an orifice through which said burnable gas is emitted, a foraminous wall in said passageway upstream from said restricted portion, a freely movable valve element in said passageway downstream from said foraminous wall, said valve element being of lesser size than the diameter of said first portion of the passageway to permit free passage of burnable gas when the passageway is angled substantially upwardly, said foraminous wall permitting free passage of burnable gas but preventing said valve element from passing thereby, said valve element being of greater size than said orifice and reactive to the pressure of burnable gas flowing through the orifice structure to move into blocking position with respect to said orifice when the passageway is angled horizontally or slightly upwardly.