Abstract: An apparatus for providing preconditioned air to at least one aircraft parked on the ground wherein internal heat exchangers lower or raise the discharge air temperature. The apparatus uses a main housing unit having a vent for air intake, a primary refrigeration system using a primary intake coil to precool or preheat the air in a primary intake plenum serving two blower intakes and two separate and independent blowers. Each blower discharge is then directed to a separate secondary plenum. Each secondary plenum uses a secondary refrigeration system to remove heat resulting from the blower and may further use a tertiary refrigeration system located downstream of the secondary system to provide further cooling or heating to achieve the desired air temperature. Each secondary plenum has an outlet for connection to parked aircraft. The apparatus can provide independent temperature, air pressure and airflow to two or more aircraft or provide appropriate temperature, air pressure and airflow to one aircraft.

Abstract: An apparatus for providing preconditioned air to at least one aircraft parked on the ground wherein internal heat exchangers lower or raise the discharge air temperature. The apparatus comprises a main housing unit comprising a vent for air intake, a primary refrigeration system, consisting of a primary intake coil, to precool or preheat the air in a primary intake plenum serving two blower intakes and two separate and independent blowers. Each blower discharge is then directed to a separate secondary plenum. Each secondary plenum of the present invention comprises a secondary refrigeration system to remove heat resulting from the blower and may further comprise an additional tertiary refrigeration system located downstream of the secondary system to provide further cooling or heating to achieve the desired air temperature, and an outlet for connection to parked aircraft.

Abstract: An extensible loading bridge for aircraft having an inboard end connected to a terminal and an outboard end adapted for connection to a parked aircraft. A heat exchanger on the outboard end supplies warm or cold air to the aircraft. Hot or cold liquid is supplied to the outboard heat exchanger from a source at the terminal end of the bridge and extensible flexible supply and return lines convey the hot or cold glycol to or from the outboard heat exchanger. A means is provided for maintaining the supply and return lines under tension and to take up and give slack to the lines when the bridge is retracted or extended.

Abstract: A pipe joint has a pair of latching hooks pivotal on opposite sides of a tubular coupling member, which hooks engage into slots in an annular plate and, when pivoted, lock over the slot ends. The hooks are simultaneously actuated by levers having free ends connected to a ring which surrounds the tubular member and is manually rotatable in the circumferential direction thereof so as to pivot the hooks to or from locking engagement with the annular plate at the ends of the slots.

Abstract: An extensible loading bridge for aircraft having an inboard end connected to a terminal and an outboard end adapted for connection to a parked aircraft. A heat exchanger on the outboard end supplies warm or cold air to the aircraft. Hot or cold liquid is supplied to the outboard heat exchanger from a source at the terminal end of the bridge and extensible supply and return lines convey the hot or cold glycol to or from the outboard heat exchanger.

Abstract: An extensible loading bridge for aircraft having an inboard end connected to a terminal and an outboard end adapted for connection to a parked aircraft. A heat exchanger on the outboard end supplies warm or cold air to the aircraft. Hot or cold liquid is supplied to the outboard heat exchanger from a source at the terminal end of the bridge and extensible supply and return lines convey the hot or cold glycol to or from the outboard heat exchanger.