Patent ID: 6044863
Filing Date: 2000-04-04
Classification: F16K,Y10T

Abstract:
A safety device against ruptures in gas pipes, the gas pipes including a main pipe and a control pipe, the gas pipes further having a gas source for producing a flow of gas within the gas pipes, the control pipe being connected to the main pipe in the proximity of a user, said safety device comprising:a housing with a cavity;a plunger within said cavity, said plunger being movable to and fro within said cavity, said plunger dividing said cavity into at least three chambers, said plunger having a smaller influencing surface facing one of said at least three chambers, said plunger having a larger influencing surface facing another of said at least three chambers, and said third of said at least three chambers being pressure-relieved;said housing further has a connection to the main pipe, said connection communicating with said smaller influencing surface of said plunger, the gas contained within the main pipe pushing said plunger upward;said housing further has a connection to the control pipe, said connection communicating with said larger influencing surface of said plunger, whereby, when the pipes contain a gas, the gas contained within the control pipe pushes said plunger towards the main pipe; andmeans for shutting off the flow of gas from the gas source when said plunger moves towards the control pipe.