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Class Information
Number: 454/326
Name: Ventilation > Having inlet airway > Including specific air distributor (e.g., register, etc.) > With adjustable valve > Plural blades pivoting along parrallel axes > Adjacent blades pivot in opposing directions
Description: Subject matter wherein the two slats or panels are positioned next to another and wherein the slats or panels rotate about their axes in opposite directions.

Patents under this class:

Patent Number Title Of Patent Date Issued
6916240 Venting system Jul. 12, 2005
6142867 Indicating apparatus for a damper opening/closing apparatus of an air diffuser Nov. 7, 2000
6129627 Air outlet assembly having outer air directing doors Oct. 10, 2000
6016976 Venting nozzle Jan. 25, 2000
5967891 Air vent for a heating or air conditioning system Oct. 19, 1999
5674124 Air register with pivoting air deflector Oct. 7, 1997
5447471 Air flow controller Sep. 5, 1995
5411438 Heating, ventilating and air-conditioning systems May. 2, 1995
5180333 Ventilation device adjusted and controlled automatically with movement of human body Jan. 19, 1993
4513655 Damper and blade therefor Apr. 30, 1985

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