TODAY’S PATENT – CRYOGENIC COOLER

The CRYOGENIC COOLER was invented by Richard M. Rawlings (Richardson, TX), Henry L. Hoefelmeyer (Wylie, TX) on 11^th February 1986, bearing the patent number US4569203A.

This invention relates to cryogenic coolers and more particularly to a closed cycle cryogenic cooler having substantially reduced operating noise.

A thermal energy detecting system includes a closed cycle cooler (refrigerator) having a piston assembly including a piston, a piston housing and a preloaded spring mounted in the piston housing between the head of the piston and the piston housing for substantially reducing any bearing clearances of the piston assembly during the pressure changes occurring above and below the piston during the cooling cycle of the cooler. Accordingly, it is an object of this invention to provide a thermal energy detector having an acceptable noise level for use where noise detection is a problem. The closed cycle cooler requires only a source of electricity to operate.