Method of controlling air flow from an inflated blanket

Details Method of controlling air flow from an inflated blanket Method of controlling air flow from an inflated blanket

1993-06-21

1994-04-19

Sykes, Angela D.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Thermal applicators

607104, A61F 700

Patent

active

053042174

ABSTRACT:
The invention pertains to the method and apparatus for forming air flow control orifices in a patient body temperature regulating blanket consisting of an inflated envelope defined by thin plastic film wherein temperature controlled air flows through the blanket orifices upon the patient's body. The blanket side disposed toward the patient is pierced by a sharp pointed punch having a plurality of intersecting facets defining sharpened intersecting edges. The punch apex and facet intersecting edges are related to the moving film in such a manner that the penetration of the punch forms a plurality of flexible valve flaps, and the valve flaps engaging the patient's body will be retained in a closed condition to restrain air flow through those orifices engaging the body to prevent exposure to excessive air temperatures.

REFERENCES:
patent: 2930594 (1960-03-01), MacCracken
patent: 3562368 (1971-02-01), Bridgeford
patent: 3956956 (1976-05-01), Bertholf
patent: 4176567 (1979-12-01), Weisberg
patent: 4653363 (1987-03-01), Lang
patent: 4867230 (1989-09-01), Voss
patent: 4871900 (1989-10-01), Hickman
patent: 5106373 (1992-04-01), Augustine et al.
patent: 5125238 (1992-06-01), Ragan et al.

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