초록 ▼

A multiple-bore throttle valve wherein the valve shaft is restrained from end play at a point between two of the flow bores. A passageway in the valve body between the flow bores intersects the valve shaft bore non-diametrically. The valve shaft has a circumferential groove at the point of intersect

A multiple-bore throttle valve wherein the valve shaft is restrained from end play at a point between two of the flow bores. A passageway in the valve body between the flow bores intersects the valve shaft bore non-diametrically. The valve shaft has a circumferential groove at the point of intersection. A pin pressed into both the passageway and the groove axially restrains the shaft at that location. Since thermal expansion or contraction of the shaft in its axial direction can proceed only from the point of restraint, a dual-bore valve in accordance with the invention exhibits length changes in each bore equivalent to that of a single bore valve, which is less than half the shaft length change exhibited in at least one bore of a prior art dual-bore throttle valve. Similarly, a triple-bore valve exhibits expansion comparable to individual prior art single-bore and dual-bore valves, and a quadruple-bore valve exhibits expansion comparable to a prior art dual-bore valve.

대표청구항 ▼

[ What is claimed is:] [1.]1. A throttle valve, comprising:a) a valve body;b) a plurality of parallel bores through said body for permitting flow of a plurality of gas streams through said body;c) a further bore in said body intersecting each of said parallel bores;d) a shaft rotatably disposed in s

[ What is claimed is:] [1.]1. A throttle valve, comprising:a) a valve body;b) a plurality of parallel bores through said body for permitting flow of a plurality of gas streams through said body;c) a further bore in said body intersecting each of said parallel bores;d) a shaft rotatably disposed in said further bore, said shaft intersecting and extending through each of said parallel bores;e) at least one valve head mounted on said shaft for rotation therewith in a corresponding one of said plurality of bores for modulating the flow of gas therethrough; andf) means for axially restraining said shaft at a location in said valve body between any two of said plurality of parallel bores.