Surgery: splint – brace – or bandage – Orthopedic bandage – Protective covering means for a bandage or cast
Patent
1997-04-17
1999-02-02
Apley, Richard J.
Surgery: splint, brace, or bandage
Orthopedic bandage
Protective covering means for a bandage or cast
602 5, 602 60, A61F 500, A61F 1300
Patent
active
058657720
ABSTRACT:
Method and apparatus in which a pump is used with a sanative protector of the type having a flexible envelope which wraps around and seals a cast, bandage or dressing on an arm, leg or other appendage of a person responsive to vacuum established in an interface region beneath the envelope. The pump comprises a bulb having a wall which encloses a pumping chamber. The wall is formed of a material and wall thickness which provides elasticity sufficient to enable inward deformation from a distended shape toward a collapsed shape, and further having an elastic memory which causes the wall to produce an elastic pressure sufficient to urge the wall outwardly from the collapsed shape toward the distended shape. A flow control mechanism enables fluid flow from within the interface region through an inlet in the bulb into the pumping chamber for reducing the vacuum level as the bulb expands toward its distended shape, and the mechanism further establishes a second path for discharging fluid from the pumping chamber to ambient atmosphere when the bulb is squeezed toward its collapsed shape.
REFERENCES:
patent: 2795245 (1957-06-01), Meehan
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patent: 3785374 (1974-01-01), Lipson
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patent: 4657003 (1987-04-01), Wirtz
patent: 4768501 (1988-09-01), George
patent: 5139475 (1992-08-01), Robicsek
patent: 5218954 (1993-06-01), van Bemmelen
patent: 5405671 (1995-04-01), Kawin et al.
patent: 5728052 (1998-03-01), Meehan
Apley Richard J.
Pothier Denise
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