Patent attributes
The herein described liquid lure dispenser is a closed chambered device, which is activated by the internal decrease in air pressure due to night-time cooling of ambient air. The enclosed reservoir is partially filled with a liquid. Expulsion of liquid and equalization of pressure within the device is controlled by two sensitive check valves. An upper check valve relieves excess air pressure as the ambient air warms during the day, which prevents fluid from being forced from the device due to increasing pressure build up. In the evening and night, when internal air pressure decreases in response to reduced ambient air temperature, the upper check valve closes. As internal air pressure begins to decrease, a lower check valve is biased to open. As internal pressure decreases, the lower check valve momentarily opens to equalize internal pressure. As the lower check valve opens, a small amount of liquid attractant is dispensed. When the internal pressure is equalized, the lower check valve closes.
