초록 ▼

A method of producing a valve includes the steps of: providing a mold comprising a pair of mating mold halves, with each of the mold halves including a mold cavity; providing a valve member-stem unit comprising a valve member of substantially circular cross-section attached to a stem, with the valve

A method of producing a valve includes the steps of: providing a mold comprising a pair of mating mold halves, with each of the mold halves including a mold cavity; providing a valve member-stem unit comprising a valve member of substantially circular cross-section attached to a stem, with the valve member including a passageway extending therethrough in a direction generally normal to the stem; inserting a mold core into the passageway of the valve member-stem unit to form a mold insert assembly; positioning the mold insert assembly within the cavity of a first of the mold halves; positioning a second of the mold halves in adjacent contacting relationship with the first mold half such that the mold insert assembly is located within the mold cavities of the first and second mold halves; injecting a polymeric material into the mold half cavities such that a valve casing forms around and captures the valve member-stem unit; and removing the valve casing, the valve member-stem unit and the mold core from the mold halves. With this method, the casing of the valve can be formed around the ball-stem unit during molding so that the product of the molding steps is ready for use.

대표청구항 ▼

[ That which is claimed is:] [1.]1. A valve, comprising:a casing including a body having an internal cavity, an inlet attached to said body and an outlet attached to said cavity, said casing further including a projection extending from said body into said cavity;a valve member being positioned at l

[ That which is claimed is:] [1.]1. A valve, comprising:a casing including a body having an internal cavity, an inlet attached to said body and an outlet attached to said cavity, said casing further including a projection extending from said body into said cavity;a valve member being positioned at least partially within said cavity and having an outer surface of substantially circular cross-section of said valve member, said valve member having an axis of rotation extending substantially normal to said passageway, said valve member further including a slot extending inwardly toward said passageway from said outer surface, said slot being defined by slot surfaces and being configured to receive said projection when said valve member is rotated about said axis of rotation, said slot further being configured such that a stop portion of said at least one of said slot walls acts as a stop for halting rotation of said valve member relative to the valve body in a first rotative direction;a stem attached to said valve member, said stem extending away from said valve member along said axis of rotation;wherein said slot and said passageway contiguous.