초록 ▼

A damper device for use with an air duct provides a paddle positioned within the air duct and an axle extending to one side of the paddle, through the duct wall and insulation to a position for manual adjustment of the position of the paddle within the duct. A bushing holds the axle in place, the bu

A damper device for use with an air duct provides a paddle positioned within the air duct and an axle extending to one side of the paddle, through the duct wall and insulation to a position for manual adjustment of the position of the paddle within the duct. A bushing holds the axle in place, the bushing being tightened against the wall of the duct by a hand nut. The hand nut provides a brightly colored flag that is extendable when the damper device is in place. An O-ring is used to cause a frictional relationship between the paddle axle and the bushing so that the paddle is fixed into place once adjusted. A contour step on the bushing face allows engagement between the paddle and the bushing so as to hold the bushing from rotating while the hand nut is threaded into place on the bushing.

대표청구항 ▼

[ What is claimed is:] [1.] A damper device for use with an air duct, the device comprising:a damper means providing a damper paddle means and a paddle axle means engaged with the damper paddle means and extending to one side of the damper paddle means so that with the damper paddle means positioned

[ What is claimed is:] [1.] A damper device for use with an air duct, the device comprising:a damper means providing a damper paddle means and a paddle axle means engaged with the damper paddle means and extending to one side of the damper paddle means so that with the damper paddle means positioned within the air duct, the paddle axle means extends through a mounting hole in the air duct for access to the paddle axle means from outside of the air duct;a tubular bushing providing a bushing head at one end thereof and a bushing body, the bushing body providing an external thread means thereon, the bushing head being positioned against an inner surface of the air duct, the bushing body coaxially engaged with the paddle axle means and extending from the mounting hole;a means for frictionally engaging the bushing body with the paddle axle means;a knob means threadably engaged on the bushing body and movable thereon for sandwiching the air duct between the bushing head and an end surface of the knob means adjacent to the bushing head and drawn into contact with an outer surface of the air duct for tightening the bushing onto the air duct;the paddle axle means extending beyond the bushing body and providing a means for grasping the paddle axle means for rotation of the paddle means from outside the air duct for adjusting the position of the paddle means within the air duct.