Coating processes – Coating by vapor – gas – or smoke
Patent
1988-06-03
1990-10-30
Childs, Sadie
Coating processes
Coating by vapor, gas, or smoke
427249, 427255, 4272552, C23C 1600, C23C 1626
Patent
active
049667890
ABSTRACT:
A process for manufacturing a pair of seal members (10 and 12) such as a pair of disks which control the fluid flow of a faucet. The two seals are formed of a moderately hard material (14), such as stellite, ceramic materials, metal materials or synthetic materials, which can be precisely ground to a particular finish. At least one of the seal members (10) is coated with a thin layer (16) of very hard material such as silicon carbides, metal carbides, metal nitrides, or cubic crystallographic lattice carbons. The coating layer is applied through either physical or chemical vapor deposition. This process provides seal disks with low friction coefficients thereby eliminating the need to provide a lubricant between the cooperating surfaces of the disks. In addition, adhesion between the seals is eliminated despite the smooth surface finish of the disks. Thus, the disks formed through the process improve operation of the faucet or valve utilizing cooperating seal disks.
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Buzzi Gunter
Knapp Alfons
Childs Sadie
Masco Corporation of Indiana
Permut Steven L.
Sutherland Malcolm L.
Zarins Edgar A.
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