Patent ID: 7185668
Filing Date: 2007-03-06
Classification: F16K,Y10T

Abstract:
1. A device for automatically opening or closing a flow passage for fluid in accordance with the temperature around the flow passage, the device comprising: a case; a thermosensitive gas generating composition accommodated in the case for generating gas when exposed to a temperature greater than or equal to a predetermined temperature; a valve mechanism driven by the generation of gas to open or close the flow passage, wherein the valve mechanism includes a ball valve body rotated to open or close the flow passage, a rotary vane accommodated in the case and rotated by a pressure change in the case, and a transmission shaft, connecting the rotary vane and the bail valve body, for transmitting the rotation of the rotary vane to the ball valve body to rotate the ball valve body; and a stopper for restricting rotation range of the rotary vane, wherein the rotary vane is located at an initial position before the gas generating composition generates gas and is located at a terminal position after the gas generating composition generates gas, the stopper including a first stopper for restricting rotation past the initial position in one direction, and a second stopper for restricting rotation past the terminal position in the opposite direction, wherein: the rotary vane includes a basal end connected to the transmission shaft, a distal end moved along an inner surface of the case when the rotary vane is rotated, and a projection formed on the basal end of the rotary vane; the first stopper includes a partition arranged in the case to contact the projection when the rotary vane is located at the initial position; and the second stopper includes a pin arranged in the case to contact the rotary vane when the rotary vane is located at the terminal position.