Filling and valving assembly for radiator system

Claim 1

A filling and valving assembly for a pressurized radiator system comprising: a. a housing portion including a first and second channel, the second channel disposed above the first in the housing portion, and a vent-fill recess above the channels, a first opening between the vent-fill recess and the second channel, and a second opening between the second channel and the first channel, the first and second openings being in verticle alignment; b. a control unit extending from the vent-fill recess through the first opening, through the second channel, through the second opening in sealing relation and into the first channel, the unit having a downwardly directed annular shoulder normally resting on and sealingly engaging the housing portion about the first opening; c. releaseable means holding the unit down in the housing portion with the shoulder so disposed; d. first passage means in the unit connecting the second and first channels; e. temperature responsive valve means selectively blocking or permitting passage through the first passage means; f. second passage means in the unit connecting the second channel and vent means adapted to vent to the atmosphere; and g. spring-pressed means in the unit normally blocking the second passage but yielding upon occurrence of excess pressure in the second channel.