Abstract: An air handler enclosure having a pivotal door panel covers an access opening leading to a blower inside the enclosure. The door panel is held in engagement with the enclosure when the panel is fully open or closed. The panel can completely disengage the enclosure if the panel is first pivoted to an intermediate position between the fully open and fully closed positions. However, the weight of the panel itself urges the panel to remain engaged with the enclosure as the panel pivots through the intermediate position, which helps prevent the panel from disengaging the enclosure unintentionally.

Abstract: An air handler enclosure having a pivotal door panel covers an access opening leading to a blower inside the enclosure. The door panel is held in engagement with the enclosure when the panel is fully open or closed. The panel can completely disengage the enclosure if the panel is first pivoted to an intermediate position between the fully open and fully closed positions. However, the weight of the panel itself urges the panel to remain engaged with the enclosure as the panel pivots through the intermediate position, which helps prevent the panel from disengaging the enclosure unintentionally.

Abstract: An ice piton assembly used for ice climbing comprising a hollow tube onto which a strike absorbent ear capable of being hammered is fitted and secured into a prenotched section of said tube so as to impart the force of the blow down the approximate center of the tube. At one end of said tube is a swivel assembly that rotates in one position and is fitted in the other and to which the climber attaches the rope. The ice piton has a feature particular to the demands of climbing in that the swivel assembly adjusts to assure the most effective downward pull regardless of the position of the piton.