Personal thermal device

Claim 1

A QUIET-OPERATING PERSONAL THERMAL SYSTEM UTILIZING CIRCULATING LIQUID COMPRISING A THIN, FLEXIBLE, HEAT EXCHANGE STRUCTURE ADAPTED TO BE PLACED IN THERMAL CONTACT WITH A PERSON''S BODY AND INCLUDING MEANS DEFINING LIQUID CONDUCTING PASSAGES EXTENDING THROUGHOUT SAID STRUCTURE AND HAVING INLET AND OUTLET PORTS, A HEAT ACTUATED PUMP, AND SUPPLY AND RETURN LIQUID-CONDUCTING MEANS COUPLING SAID PUMP TO SAID INLET AND OUTLET PORTS RESPECTIVELY TO CIRCULATE LIQUID THROUGH SAID PASSAGES, SAID PUMP INCLUDING A SUPPLY CHECK VALVE IN SAID SUPPLY LIQUID-CONDUCTING MEANS TO SAID INLET PORT AND A RETURN CHECK VALVE IN SAID RETURN LIQUID-CONDUCTING MEANS FROM SAID OUTLET PORT, A VAPOR GENERATOR CHAMBER IN WHICH TO FORM VAPOR BY HEATING WHEREBY TO FORCE LIQUID OUT OF SAID PUMP DUE TO DISPLACEMENT OF LIQUID BY VAPOR, MEANS FOR HEATING SAID VAPOR GENERATOR CHAMBER, A VAPOR CONDENSER CHAMBER IN WHICH TO CONDENSE VAPOR GENERATED IN SAID GENERATOR CHAMBER WHEREBY TO DRAW LIQUID INTO SAID PUMP TO REPLACE THE CONDENSED VAPOR, AND A VAPOR TRANSFER PASSAGE BETWEEN SAID GENERATOR CHAMBER AND SAID CONDENSER CHAMBER.