Refrigeration – Separable ambulant cooled enclosure and power or cooling source
Patent
1979-08-20
1981-02-24
King, Lloyd L.
Refrigeration
Separable ambulant cooled enclosure and power or cooling source
62259B, 62402, F25D 1500, F25D 2312, F25D 900
Patent
active
042519942
ABSTRACT:
A breathing apparatus is provided which delivers cool, air conditioned air to a remote location as much as 100 feet away from the apparatus proper. The unit is powered by an air motor operable from an industrial compressed air tank, and an oil-less pump is driven by the air motor to elevate the pressure of fresh air adequately for remote delivery. Cooling of both the drive air and the respirable fresh air is provided by radiators, and a final cooling stage is incorporated as a heat exchanger which cools the fresh air from the spent drive air, the latter having reached a very low temperature due to the rapid expansion of the air as it passes through the air motor. After the air from the compressor is used first to drive the pump drive motor and then through the heat exchanger to cool the breathable air, it is used yet a third time in the preferred embodiment by transmitting it with the breathing air in a hermetically separate cooling envelope so that virtually all of the energy used to initially compress the air is recouped to the greatest extent physically possible.
REFERENCES:
patent: 2819590 (1958-01-01), Green
patent: 2850325 (1958-09-01), Suess
patent: 3320765 (1967-05-01), Chapple et al.
patent: 3399545 (1968-09-01), Anderson et al.
patent: 3515135 (1970-06-01), Flower et al.
patent: 3777506 (1973-12-01), Hergatt
patent: 3859816 (1975-01-01), McDonald
patent: 3878692 (1975-04-01), Steves
Branscomb Ralph S.
King Lloyd L.
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