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US 6,387,090 B1Granted
Methods and apparatus for cooling surfaces
AssigneeOrasure Tehcnologies, Inc.
InventorKlaas Jensma
Life of this patent
Estimating the term…
Abstract
In methods and apparatus for cooling surfaces, a pressurized liquid refrigerant is dispensed through a shaped member composed of an open celled foam. The method is particularly useful for localized freezing of a wart or other growth prior to its removal from skin of a human being or another animal.
Claims16
An applicator for dispensing a liquid refrigerant, said applicator comprising
- (1) an outlet tube which has
- (a) a first end, and
- (b) a discharge end;
- and
- (2) a dispensing head which
- (a) comprises a shaped, open celled foam member, which is hollow and fits over the discharge end of the outlet tube so that there is a space between the discharge end and the foam, wherein at least a part of the space between the discharge end and the foam is filled by a permeable solid material and
- (b) is secured to the discharge end of the outlet tube so that a refrigerant supplied under pressure to the first end of the outlet tube is dispensed through the open celled foam.
4 more elements
Dependencies are inferred from the claim text.