Fluid handling – Systems – Dividing into parallel flow paths with recombining
Patent
1993-12-23
1994-09-13
Hepperle, Stephen M.
Fluid handling
Systems
Dividing into parallel flow paths with recombining
1375121, 454325, 454335, F16K 1116
Patent
active
053459660
ABSTRACT:
According to the present invention a damper for controlling the flow of conditioned air supplied through a supply duct to a conditioned space is provided. The damper includes a support housing which defines a flow passage which communicates the supply duct with the conditioned space. A plurality of damper blades are mounted within the support housing for pivotal movement about respective spaced apart parallel axes. A blade link interconnects the damper blades in a ganged relation so that a common pivoted orientation of the damper blades is determined by the position of the blade link. Means are provided for selectively exerting a force on the blade link which will either move the link toward the second position to increase the flow of air through the damper or for exerting a force on the blade link to move the link toward the first position to decrease the flow of air through the damper. Means are provided which allows the blade link to move toward the second position (maximum flow) in response to a force imparted on the damper blades by a build-up of pressure in the supply duct. Under such circumstances the force imparted upon the damper blades is sufficient to overcome the force exerted on the blade link to move the link toward said first position (flow substantially blocked).
REFERENCES:
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patent: 4844120 (1989-07-01), Myers
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patent: 5277658 (1994-01-01), Goettl
Carrier Corporation
Hepperle Stephen M.
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