Earthquake relief valve

Earthquake responsive device for automatically shutting off gas

Earthquake safety valve shut-off

Earthquake shut-off valve for gas line

Earthquake-responsive fuel shut-off device

Float controlled hydraulic leveler

Fuel line cut-off switch

Gravity-controlled flow valve

Movement detector and fluid shut-off device

Multifunctional urgent shutoff safety valves

Safety cut-off device for piping systems and the like

Safety sensor device

Seismic activated actuator

Seismic actuated shut-off valve

Seismic safety cutoff device

Seismic trigger

Seismically actuated valve release structure

Shock responsive rotary actuator

Valve closing apparatus responsive to movement

Vibration activated relief valve