Textron Inc.
Lubrication system with passive valve

Abstract:

A valve with supplemental media and a piston configured to open the valve when a first force is greater than a second force. The pressure of the supplemental media exerts a substantial portion of the first force. The valve also has a biasing member that changes volume as temperature changes and exerts a substantial portion of the second force. The second force decreases as the temperature of the biasing member increases.