Circular diffuser for ventilating systems
OwnerFrederick R. Holfordinventor
Life of this patent
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Abstract
A circular or polygonal diffuser for ventilating systems, comprising an annular outer diffuser cone or pyramid adapted to be fixedly mounted in a ceiling of a room to be ventilated, and an inner diffuser cone or pyramid assembly which includes at least one diffuser cone or pyramid of smaller dimensions than the outer diffuser cone or pyramid and which is connected to the outer cone or pyramid for axial adjustment relative thereto by means of parallelogram linkage devices having friction inducing means serving to retain the inner cone or pyramid assembly in the adjusted position.
Claims7
A circular diffuser for ventilating systems, comprising a fixedly mountable outer diffuser cone, an inner diffuser cone assembly movably mounted within said outer diffuser cone for adjustment co-axially thereto and including at least one diffuser cone of smaller dimensions than said outer diffuser cone, and parallelogram linkage devices each pivotally connecting respectively at solely two diagonally opposite vertices the inner diffuser cone assembly to the outer diffuser cone, the remaining diagonally opposite vertices being free, and including friction inducing means, whereby to cause the inner cone assembly to remain in position after effecting an adjustment thereof relative to the outer diffuser cone.
Dependencies are inferred from the claim text.