A CONNECTION COLLAR HAVING AN ADJUSTABLE DAMPER

摘要

The present invention relates to a connection collar for a duct ventilation system and furnace. The connection collar is comprised of a self guiding and self-locking damper valve, which when positioned becomes part of a completely sealable joint when used with preferably flexible insulated heating pipe. With the adjusting apparatus and locking apparatus completely contained within the connection collar the connection collar forms a vapor barrier when used with the preferable pipe and or furnace. The self-locking aad self guiding apparatus comprises of a spring biassing arrangement and a cone shaped receiver equipped with catch teeth which when engaged mate with teeth circumferentially positioned on the damper apparatus.