Back to results
US 6,673,030 B1Granted
Casting material
AssigneeBSN Medical, Inc.
InventorClaire Peel
Life of this patent
Estimating the term…
Abstract
An Orthopaedic Plaster of Paris bandage (10) comprising a water resistant layer of material (50; 60) on at least one face of the bandage (10) which allows the bandage (10) to be cured by water but once the bandage (10) is set, the bandage (10) is water resistant against disintegration.
Claims15
A Plaster of Paris splint bandage, comprising:
- (a) a flexible substrate;
- (b) a hemi-hydrate form of calcium sulfate carried by said substrate, said hemi-hydrate form of calcium sulfate remaining stable when maintained in moisture-free conditions and curing upon exposure to sufficient moisture to form a rigid, self-supporting structure;
- and
- (c) a layer of water resistant material carried by said bandage, said water resistant material permitting subsequent exposure of the hemi-hydrate form of calcium sulfate to the moisture used to initiate curing while providing water resistance to the bandage after curing is complete, said water resistant material being contained in a fluid vehicle, wherein said fluid vehicle contains a predetermined amount of water less than the stoichiometric amount of water required to convert the hemi-hydrate form of calcium sulphate in the bandage to the dy-hydrate form of calcium sulphate.
1 more element
A method of manufacture of a water resistant Plaster of Paris splint bandage, comprising the steps of:
- (a) providing a bandage including a flexible substrate carrying a hemi-hydrate form of calcium sulfate thereon, said hemi-hydrate calcium sulfate remaining stable when maintained in moisture-free conditions and curing upon exposure to sufficient moisture to form a rigid, self-supporting structure;
- and
- (b) applying a layer of water resistant material to said bandage prior to exposure of the hemi-hydrate form of calcium sulfate to the moisture to initiate curing thereof, said water resistant material imparting water resistance to the bandage after curing is complete, said water resistant material being contained in a fluid vehicle, wherein said fluid vehicle contains a predetermined amount of water less than the stoichiometric amount of water required to convert hemi-hydrate form of calcium sulphate in the bandage to the di-hydrate form of calcium sulphate.
A water resistant splint bandaging system, comprising:
- (a) a Plaster of Paris splint bandage carrying a hemi-hydrate form of calcium sulfate thereon adapted for remaining stable when maintained in moisture-free conditions and curing upon exposure to sufficient moisture to form a rigid, self-supporting structure;
- and
- (b) a water resistant material for being applied in a layer to said bandage prior to exposure of the bandage to the moisture, said water resistant material imparting water resistance to the bandage after curing is complete, said water resistant material being contained in a fluid vehicle, wherein said fluid vehicle contains a predetermined amount of water less than the stoichiometric amount of water required to convert the hemi-hydrate form of calcium sulphate in the bandage to the di-hydrate form of calcium sulphate.
Dependencies are inferred from the claim text.