Abstract: A self-tapping fastener or fastening peg secures a weatherseal to a mounting surface of an automotive vehicle. A pointed, conical nose pierces the weatherseal to form an opening. In the preferred embodiment, the fastening peg is rotated at a first velocity as it is axially advanced toward the weatherseal to create an opening. The fastening peg is further axially advanced and rotated at a second velocity to advance a first flange through the pierced opening, thereby securing the fastening peg to the weatherseal. The weatherseal is then secured to a vehicle mounting surface by advancing a locking assembly through a pre-formed opening in the mounting surface.

Abstract: An inflatable bag of flimsy plastic material is placed in the air duct of a house or other building. The bag is coupled to a fan and electric motor. The device is placed near the duct outlet register, where it can be easily inserted and retrieved. The motor is operated, to inflate/deflate the bag, by a thermostat in the room via radio connection between the thermostat and the motor. When the bag is deflated, the duct is open, and treated air from a central unit can then enter the room. The bag takes air from inside the duct, and static pressure inside the duct holds the bag inflated; when the bag is deflated, the air intake faces away from velocity of the flowing air, so the flowing air does not tend to inflate the bag. The fan motor is driven by a battery.