Forced air warming unit

Details Forced air warming unit Forced air warming unit

2005-04-05

2005-04-05

Gibson, Roy D. (Department: 3739)

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Thermal applicators

C607S099000, C607S104000

Reexamination Certificate

active

06876884

ABSTRACT:
A forced air warming unit has a casing that encloses a scroll housing with a curved inside surface. A blower is disposed in the scroll housing inside the curved surface. Inlet and outlet openings are provided in the casing. A circuit board is mounted in the casing, against the scroll housing so that the blower is enclosed in space between the scroll housing and the circuit board. At least one opening is provided through the circuit board into the space in which the blower is disposed. A tapered, elongate, arcuate heater plate is disposed in the scroll housing between the circuit board and the blower, with a relatively wide end near the outlet opening and a second, relatively narrower end near the curved inside surface. Air is conducted in response to operation of the blower through the inlet opening, along a first side of the circuit board through the one or more openings in the circuit board into the scroll housing. Air is also conducted in response to operation of the blower along a second side of the circuit board which faces the scroll housing, through air passages in the circuit board to and along the first side through the one or more openings, into the scroll housing. Air entering the scroll housing in response to operation of the blower is accelerated by the blower along the curved inside surface while being heated in response to operation of the heater plate. Heated, pressurized air exits the forced air warming unit through the outlet opening. Provision is made for connecting an air hose to the outlet opening for conducting the pressurized, heated air to a pneumatic, convective device.

REFERENCES:
patent: 3724092 (1973-04-01), McCleerey
patent: 4225775 (1980-09-01), Carter
patent: 4321456 (1982-03-01), Ohnmacht et al.
patent: 4701595 (1987-10-01), Okutsu et al.
patent: 5243682 (1993-09-01), Eberts
patent: 5349161 (1994-09-01), Bockholt
patent: 5386644 (1995-02-01), Lawall et al.
patent: 5875562 (1999-03-01), Fogarty
patent: 20040153132 (2004-08-01), Cobb et al.

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