초록 ▼

A film valve designed to replace a semi cylindrical, solid rotary valve, which rolls the film against or away from the perimeter seal of an HVAC outlet opening without relative rubbing. Spring biased take up rollers journaled on V shaped, resilient wire support legs keep a film sheet biased against

A film valve designed to replace a semi cylindrical, solid rotary valve, which rolls the film against or away from the perimeter seal of an HVAC outlet opening without relative rubbing. Spring biased take up rollers journaled on V shaped, resilient wire support legs keep a film sheet biased against interleaved, arcuate support fingers to hold the film in the necessary curved shape. The curved film sheet rolls up or winds out from the rollers as the legs are pushed toward one another, or allowed to swing away from one another. The film rolls down onto or up and off of the foam seal surrounding the outlet opening without relative rubbing.

대표청구항 ▼

[ I claim:] [1.] In an automotive heating, air conditioning and ventilation housing with an air opening oriented in a convex semi cylinder with first and second, opposed flat edges joined by opposed arcuate edges, the improvement comprising a self supporting, rotary film valve within said housing fo

[ I claim:] [1.] In an automotive heating, air conditioning and ventilation housing with an air opening oriented in a convex semi cylinder with first and second, opposed flat edges joined by opposed arcuate edges, the improvement comprising a self supporting, rotary film valve within said housing for selectively covering or uncovering said opening with substantially no rubbing against the surface of the interior perimeter of said opening, comprising:a thin film sheet having first and second opposed edges corresponding to the opposed first and second flat edges of said opening, and with an outer surface facing the interior perimeter of said opening and large enough in area to block said opening, said film sheet being sufficiently flexible to be rolled repeatedly up and out;a support frame having a support leg which is swingable in an arc generally along said opening's arcuate edges and toward and away from one of said flat edges;a cylindrical roller attached to one of and supported on said support leg so as to be rotatable about its own axes and to swing concurrently along said opening's arcuate edges and toward and away from one of said opening's first and second flat edges;means continually biasing said roller to rotate about its own axis so as to concurrently roll said film sheet up and onto said roller as said roller move away from said opening's one flat edge;interleaved arcuate support fingers on said support frame leg and support frame matching the curvature of said opening's arcuate edges and continually tensioned against the inner surface of said film sheet so as to maintain said film sheet closely engaged with the surface of the interior perimeter of said opening; and,an actuator to selectively swing said support frame's support leg relatively away from said housing opening's one flat edge and roll said film sheet up and onto said roller, or to swing said frame support leg relatively toward said one flat edge and thereby roll said film sheet out and off of said roller;whereby, as said actuator swings said roller back and forth, said film sheet is rolled up on said roller and away from said opening's interior perimeter or rolled off of said roller and onto said opening's interior perimeter to uncover or cover said opening without substantial rubbing of said film sheet against the surface of said opening's interior perimeter.