Abstract: A lightweight face mask for heating surrounding air to be inhaled by a user includes a thin cup-shaped inner shell and an outer shell spaced from and surrounding the inner shell, the inner and outer shells defining a preheating chamber therebetween through which air passes in a counter-current flow pattern before entering a user breathing space inside the inner shell. The mask may include an electric heating element and battery power supply for additionally heating air entering the user breathing space.
Abstract: The invention is directed to a prefabricated composite pavement device comprising a shaped pavement mixture portion bonded to a support portion and a method and apparatus for making the same.
Abstract: A child resistant buckle for seat belt restraints comprising a two-part buckle in which the female part, or part containing the release button, has a multi-part release button which can only be operated by a full size hand. A smaller, child's hand, having smaller fingers and thumbs, will not normally apply simultaneous pressure to all of the parts of the release button, which must be actuated simultaneously to release the other part of the buckle.
Abstract: A warning system for multi-lane roadways comprising a group of strips placed longitudinally across only the left-most lane of the roadway as referenced by a person facing in the designated direction of traffic flow.