초록 ▼

A safety cut-off valve for gasses or fluids delivered to buildings which are severely damaged in earthquakes. The valve consists of a non-magnetic housing enclosing a magnetic valve piece which conjugally matches a non-magnetic valve seat to which communicate inlet and outlet so that when the valve

A safety cut-off valve for gasses or fluids delivered to buildings which are severely damaged in earthquakes. The valve consists of a non-magnetic housing enclosing a magnetic valve piece which conjugally matches a non-magnetic valve seat to which communicate inlet and outlet so that when the valve piece occupies the seat the inlet and outlet are isolated. The internal enclosed valve piece is held away from the valve seat by an external permanent magnet which is toppled during earthquake thus releasing the internal valve piece into its seat and so closing the valve. By replacing the external permanent magnet in its correct position and orientation the internal valve piece is again drawn away from the seat opening the valve.

대표청구항 ▼

A valve for closing off the flow of gasses or fluids when said valve is accelerated comprising: a non-magnetic housing enclosing a magnetic valve piece conjugal with a non-magnetic valve seat which communicates to inlet and outlet means for the passage of gasses or fluids such that when said magneti

A valve for closing off the flow of gasses or fluids when said valve is accelerated comprising: a non-magnetic housing enclosing a magnetic valve piece conjugal with a non-magnetic valve seat which communicates to inlet and outlet means for the passage of gasses or fluids such that when said magnetic valve piece sealingly occupies said non-magnetic valve seat it isolates inlet from outlet; and means of hermetically sealing said enclosed magnetic valve piece within said non-magnetic housing; and means of safely attaching supply pipe to said inlet and delivery pipe to said outlet of said non-magnetic housing; and a permanent external magnet, not being mechanically attached to said non-magnetic housing, which holds said enclosed magnetic valve piece vertically with respect to gravity, above and away from said non-magnetic valve seat thus opening said valve, wherein the improvement comprises said permanent external magnet which is of elongated shape such that the position of the centre of gravity of said permanent external magnet in relation to and above the base of said permanent external magnet will determine its sensitivity to toppling away from said non-magnetic housing and closure of the valve when said non-magnetic housing is accelerated thus allowing for simplicity of manufacture and selection of sensitivity.