Pumping unit for delivery of liquid medium from a vessel
Patent Information
- Authority / Receiving Office
- US · United States
- Patent Type
- Applications(United States)
- Current Assignee / Owner
- ICECURE MEDICAL
- Publication Date
- 2009-05-21
- Estimated Expiration
- Not applicable · inactive patent
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Abstract
Description
FIELD OF THE INVENTION
[0001] The invention relates to a pumping unit and, in particular, to a high pressure pump, for example for delivery of a liquid medium such as liquid cryogen from a vessel with sufficiently high pressure, while maintaining low pressure in the vessel itself.BACKGROUND OF THE INVENTION
[0002] There are some US patents describing pumping systems, which operate on the basis of a geyser principle.
[0003] U.S. Pat. No. 4,552,208 describes an apparatus and method for circulating a heat transfer liquid from a heat collector to a heat exchanger which is located at a level below that of the heat collector by at least partially vaporizing the heat transfer liquid in the steeply sloped collector and the vapor / liquid rises in a series of “slugs” to a condenser located adjacent the top end thereof. The vapor is condensed and the hot liquid is forced downwardly to the heat exchanger by the pressure of the rising slugs of vapor and liquid. After giving up useful heat in the heat e...