Air flow system with full control elliptical vane louvers

Claim 2

In a fluid flow control system, a louver unit, comprising: a. a main frame having a fluid exit therein of a specific size, b. a second frame pivotally mounted with said main frame and having at least one side member of substantially said specific size adapted to form a door for said exit, c. a vane array pivotally mounted within said second frame to direct air in a desired direction thru said exit, d. means in said second frame involving rotation of said second frame to selectively open and close said exit in incremental steps from fully open to fully closed condition, e. and means in said vane array to selectively direct fluid flow thru that portion of said exit remaining open.

Claim 3

A louver unit as in claim 1 wherein said second frame is an open box frame that includes at least one door integrally and rigidly attached thereto as a side member thereof which moves with said box frame to open and close said exit.

Claim 4

A louver unit as in claim 1 wherein said second frame includes a plurality of doors which rotate with said second frame from a position of closure to an open position and thence to a second and different position of closure relative to said exit.

Claim 5

A louver unit as in claim 3 wherein said second frame is readily removably mounted to said main frame about a horizontal axis in said main frame and wherein said doors rotate with said second frame and about said horizontal axis to selectively open and close said exit.

Claim 6

A louver unit as in claim 4, wherein said main frame and second frame include means to limit the rotary movement of said second frame within said main frame to a total peripherial exposure in said exit of approximately 270*.

Claim 7

A louver unit as in claim 1 wherein said second frame includes a stop adjacent said door to limit the movement of said second frame when said door has fully occupied said fluid exit.

Claim 8

A louver unit as in claim 1 wherein said vane array comprises a horizontal shaft and a pin projecting outward at each end of said shaft, and means for mounting said pins in said second frame to permit rotary movement of said vane array about a second horizontal axis in said second frame offset from said first named axis in a direction to occupy a position closer to said fluid exit when said exit is open.

Claim 9

A louver unit as in claim 4 wherein said vane array comprises a horizontal shaft and means for mounting said vane array in said second frame for rotating said vane array about a second horizontal axis in said second frame, and wherein said vane axis is offset from said horizontal axis in said main frame in a direction to move said vane array closer to said exit at one position of rotation of said second frame.

Claim 10

In an air flow control system, a louver unit comprising: a. a main frame having a fluid exit therein, b. a box frame pivotally mounted in the main frame, c. a rotary vane array on a shaft pivotally mounted within said box frame, d. means in said box frame to selectively open and close said exit, e. said means comprising parallel doors forming an integral parT of said box frame, and positionable between said exit and array f. a second means in said vane array to selectively direct air flow through said exit, g. said second means comprising a series of elliptical vanes mounted parallel to each other and oblique to said shaft; h. said box frame being pivotally mounted to rotate about a horizontal axis in said main frame and move said doors into and out of a position of closure relative to said exit, i. and said vane array being pivotally mounted to rotate about a second horizontal axis in said box frame, j. said second horizontal axis being offset from said first horizontal axis in a direction to move said vane array in the direction of said exit when neither of said doors occupies a position of closure relative to said exit.

Claim 11

In an air flow control system, a louver unit comprising: a. a main frame having a fluid exit therein, b. a box frame pivotally mounted in the main frame, c. a rotary vane array on a shaft pivotally mounted within said box frame, d. means in said box frame to selectively open and close said exit, e. said means comprising parallel doors forming an integral parT of said box frame, and positionable between said exit and array f. a second means in said vane array to selectively direct air flow through said exit, g. said second means comprising a series of elliptical vanes mounted parallel to each other and oblique to said shaft; h. said box frame being pivotally mounted to rotate about a horizontal axis in said main frame and move said doors into and out of a position of closure relative to said exit, i. and said vane array being pivotally mounted to rotate about a second horizontal axis in said box frame, j. said second horizontal axis being offset from said first horizontal axis in a direction to move said vane array in the direction of said exit when neither of said doors occupies a position of closure relative to said exit.