Pipes and tubular conduits – Thawing and freeze protection – Portable thawing apparatus
Patent
1989-08-09
1991-01-22
Stinson, Frankie L.
Pipes and tubular conduits
Thawing and freeze protection
Portable thawing apparatus
138 32, E03B 714
Patent
active
049863118
ABSTRACT:
Apparatus for clearing frozen water lines or conduits includes a wheel mounted cart or main frame supporting a holding tank or reservoir open to the atmosphere along with means for heating the holding tank. A vertical standpipe has a top end portion open to the atmosphere and a bottom end portion which can be attached to, and longitudinally aligned with, an open end portion of an ice blocked conduit to be cleared. A first hollow return line is open from a part of the standpipe vertically above the holding tank and into the holding tank. A second hollow return line is open from a portion of the standpipe above the first return line and below the open top of the standpipe, and it, too, opens into the holding tank. An inner end of a length of flexible tubing is extended down through the standpipe and into the conduit to be adjacent to the ice to be cleared. A pump is open to the bottom of the holding tank and to an outer end of the flexible tubing. Water or other appropriate circulating fluid is initially entered into the holding tank in enough volume to fill the pump, the flexible tubing, the blocked portion of the conduit, and the standpipe up to the opening of the first return line, after the water has been heated in the holding tank and the pump has been turned on.
REFERENCES:
patent: 77857 (1868-05-01), Young
patent: 458503 (1891-08-01), Simpson
patent: 529204 (1894-11-01), Simpson
patent: 1243973 (1917-10-01), Philippon
patent: 1361023 (1920-12-01), Darley
patent: 4102358 (1978-07-01), Sherock
patent: 4124039 (1978-11-01), St. Laurent
patent: 4250925 (1981-02-01), Mast
patent: 4449553 (1984-05-01), Sullivan et al.
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