Patent ID: 8857458

Claim:
An earthquake valve comprising: a valve body; and a sensor mechanism configured to detect seismic movement, the sensor mechanism comprising: a protective cover, a steel ball protected by the protective cover, a hollow, ball seating cylinder embedded to a cover body and configured to support the steel ball, a motion rectifying cylinder, at least one motion rectifying ball, at least one trigger ball, a push-down spring positioned within the hollow, ball seating cylinder, a claw pin positioned within the hollow, ball seating cylinder and under the push-down spring, a lifting spring positioned around the hollow, ball seating cylinder, a trigger cylinder positioned above the lifting spring, a claw ball positioned below the claw pin, a spindle positioned below the claw pin, and a plumb, wherein the sensor mechanism is configured to transmit movement of the steel ball into downward movement of the trigger cylinder, upward movement of the claw pin, and lateral movement of the spindle to effect valve closure, and wherein the trigger cylinder comprises a first trigger ball slot, the claw pin comprises a second trigger ball slot, and the spindle comprises a spindle claw slot.