Refrigeration – Processes – Circulating external gas
Patent
1978-10-11
1983-11-15
Sever, Frank
Refrigeration
Processes
Circulating external gas
F25J 102
Patent
active
044153465
ABSTRACT:
A snow horn of improved design having a concentric gas venting system formed integrally therewith. The snow horn is utilized for producing solid CO.sub.2 particles CO.sub.2 in its liquid form. The device has a downwardly directed skirt with a cylindrical, or preferably, a truncated, conically tapered shape which is open at its lower, larger diameter end. A hemispherically-shaped head is mounted at the top, smaller diameter end of the skirt and an orifice means is mounted substantially at the radial center of the head for allowing the expansion of the liquid CO.sub.2 inside the head and skirt. The gas venting system consists of a concentric hood mounted at its lower edge to an outwardly directed annular flange which is secured about the lower end of the snow horn skirt so as to form an enclosed chamber about said head and skirt. A port means opens into the enclosed chamber at its lower end and an exhaust means opens into said enclosed chamber at its upper end for drawing the CO.sub.2 gas through the port means and out of the enclosed chamber.
REFERENCES:
patent: 1818816 (1931-08-01), Rufener et al.
patent: 2145096 (1939-01-01), Schutz
patent: 3443389 (1969-05-01), Townsend et al.
patent: 3492829 (1970-02-01), Stanford, Jr.
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