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US 4,628,954 AGranted
Multi-use damper
AssigneeRachels Industries, Inc.
InventorLloyd G. Dayus
Life of this patent
Estimating the term…
Abstract
An air damper having a housing, a strut mounted across the housing, a pair of damper panels hinged on the strut, and swingable between open and closed positions, an adjustable control above the strut, and, linkage on the upper side of each panel extending to the control to cause the panels to swing from one position to the other.
Claims6
An air control damper for use in association with an air supply and an air outlet and comprising:
- a housing defining upstream and downstream portions, and a flow axis;
- supply connection means on said upstream portion adapted for connection to said air supply;
- a strut member mounted in a generally transverse manner across said housing;
- a pair of damper panels having upstream and downstream sides and hingedly mounted on said strut member, and swingable between an upstream open position located in said upstream portion of said housing, and a generally transverse closed position obstructing said flow axis and defining a closure plane located between said upstream and downstream portions of said housing;
- spring means engaging said damper panels and urging same to close;
- adjustable movement means mounted on said strut member and located in said upstream portion of said housing, and,
- a pair of attachment brackets on the upstream side of said damper panels having respective pivot openings;
- a pair of link openings on said adjustable movement means;
- a pair of fusible links pivotally connected between said respective pivot openings and said respective link openings, whereby to cause said panels to swing from one position to the other in response to said movement means.
6 more elements
Dependencies are inferred from the claim text.