Metal working – Method of mechanical manufacture – Valve or choke making
Patent
1997-08-26
1999-02-09
Fox, John
Metal working
Method of mechanical manufacture
Valve or choke making
264279, F16K 1106
Patent
active
058679006
ABSTRACT:
A method of manufacturing a valve rotor with a wear-resistant, low-friction surface, wherein a disk having angled edges and a shape which correspond with the surface of the rotor is formed from a sheet of polytetrafluoroethylene (PTFE). The disk is placed at the bottom of a mold cavity, and a plastic material is injected in the mold. The plastic fills the mold cavity surrounding and covering the angled edges of the disk. Once hardened, the plastic is locked together with the angled edges of the PTFE disk. In a preferred embodiment, a method of manufacturing a water treatment valve rotor with a PTFE rotating surface is shown.
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Kenmore Standard Capacity 30 Water Softener Owners Manual (Sears); 7117264 (Mar. 1992); Model No. 625.3483003; pp. 1,28,29 and 32.
Larson Ralph H.
Yavorsky William M.
Ecowater Systems, Inc.
Fox John
LandOfFree
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