Push-pull control with spring-loaded seal
AssigneeControlex Corporation of America
InventorAlan H. Paynter
Life of this patent
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Abstract
An effective seal against the infiltration of foreign matter into a push-pull remote control is provided by a spring-loaded ring seal disposed in contact with a slidable end rod of the control. The ring seal is formed by a plastic C-shaped channel which holds a metal helical spring. One of the two spring-loaded side walls of the C-shaped channel presses against the cylindrical surface of the end rod and thus impedes the penetration of dust and vapors into the remote control.
Claims8
In an end fitting of a push-pull remote control wherein the cylindrical end rod of the push-pull element extends therethrough, the improvement of a spring-loaded plastic ring seal disposed within said end fitting, said ring seal comprising a flexible plastic ring having a C-shaped cross-section and a metal coil spring inserted in said C-shaped cross-section and extending circularly throughout said plastic ring to press the two opposite free lips of said C-shaped cross-section apart, said ring seal being disposed with one of said lips in pressing contact with said end rod.
In an end fitting of a push-pull remote control wherein the cylindrical end rod of the push-pull element extends through a tubular bushing held within said end fitting, the improvement of a spring-loaded plastic ring seal disposed within said end fitting aligned with the bore in said bushing, said ring seal comprising a flexible plastic ring having a C-shaped cross-section and a metal coil spring inserted in said C-shaped cross-section and extending circularly throughout said plastic ring to press the two opposite free lips of said C-shaped cross-section apart, said ring seal being disposed with one of said lips in pressing contact with said end rod.
Dependencies are inferred from the claim text.