Two component molded valve stems
OwnerGraham Purkins, Gary Mahon +1inventors
InventorsGraham Purkins, Gary Mahon, Heinz Klein
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Abstract
A valve stem for use with a metering valve, said valve stem comprising an elongate stem element and a sealing element arranged onto the elongate stem element, wherein the sealing element is co-molded with at least a portion of the elongate stem element and the elongate stem element is made of a material comprising a polymer selected from the group consisting of polyaryletherketones, thermotropic liquid crystalline polymers, polymethylpentene, polyphenylene sulfide and mixtures thereof; as well as methods of manufacturing such a valve stem.
Claims32
A valve stem for use with a metering valve, said valve stem comprising an elongate stem element and a sealing element arranged onto the elongate stem element, wherein the sealing element is co-molded with at least a portion of the elongate stem element and the elongate stem element is made of a material comprising a polymer selected from the group consisting of polyaryletherketones, thermotropic liquid crystalline polymers, polymethylpentene, polyphenylene sulfide and mixtures thereof.
A method of manufacturing a valve stem comprising an elongate stem element and a sealing element, said method comprising the steps of:
- a) providing a first mold shape;
- b) molding a first material comprising a polymer selected from the group consisting of polyaryletherketones, thermotropic liquid crystalline polymers, polymethylpentene, polyphenylene sulfide and mixtures thereof to form the elongate stem element;
- c) providing a second mold shape containing at least in part the elongate stem element;
- and
- d) molding a second material to form the sealing element, such that the sealing element is arranged onto and co-molded with at least a portion of the elongate stem element.
A method of manufacturing a valve stem comprising an elongate stem element and a sealing element, said method comprising the steps of:
- a) providing a second mold shape;
- b) molding a second material to form the sealing element;
- c) providing a first mold shape underlying at least in part the sealing element;
- and
- d) molding a first material comprising a polymer selected from the group consisting of polyaryletherketones, thermotropic liquid crystalline polymers, polymethylpentene, polyphenylene sulfide and mixtures thereof to form the elongate stem element having the sealing element arranged onto and co-molded with at least a portion of said elongate stem element.
Dependencies are inferred from the claim text.