Abstract: Particulate material entrained in pressurized gas such as compressed air is conveyed from a pressure vessel to a discharge vessel through a conveyor duct. The discharge end of the duct is fitted with a flow restrictor producing a discrete constriction of the flow discharging from the duct into the vessel with the result that the pressure drop along the main part of the duct is reduced so that lower velocities can be maintained within the duct.

Abstract: An automotive diagnostic interface device for quickly determining engine problems from a remote location. The automotive diagnostic interface device includes includes a hand-held interface unit including a housing, a microprocessor disposed in the housing and having circuitry for interfacing with an engine management computer system and also having circuitry for transforming and transmitting data to a receiver/transmitter with the hand-held interface unit further including an input cable connected to the microprocessor and having an end, and an output cable connected to the microprocessor and having an end; and also includes an adapter plug securely connected to the end of the input cable and being adapted to be received in a diagnostic port of the engine management computer system; and further includes an acoustics coupler securely connected to the end of the output cable and being adapted to be connected to a telephone.