Abstract: An air injection device including a housing defining an air duct therein and a valve associated with the air duct for controlling the flow of air therethrough from a pressure source (55). The valve has a sheet (59) of flexible material positioned within the air duct, the sheet (59) being mounted on a face (60) of the air duct with the ends of the sheet (59) restricted from moving in a direction substantially orthogonal to the face (60) but free to move in a direction parallel to the face (60). The sheet (59) is operably connected to control, such as a solenoid valve (62), for controlling the contour of the sheet (59), within an air flow passing through the air duct. In one embodiment a second sheet is positioned on the inside top face of the duct opposite the first sheet (59). The air injection device is particularly useful for application with a sheet separator-feeder.

Abstract: A liquid dispensing system for dispensing fuel such as gasoline, for example, includes a nozzle to which is mounted an actuator controlled transducer. The extent of movement of the actuator from a rest position causes the transducer to produce a flow rate signal having a magnitude proportional to the degree of movement of the actuator. The flow rate signals are electrically connected to a remotely located controller which responds to the signals by providing drive signals for operating a proportional flow control valve opening for attaining the called for flow rate of fluid to be dispensed from the remotely located valve, through a hose, to the nozzle for dispensement therefrom.

Abstract: An inexpensive portable liquid supply tank that serves initially as a shipping container and as a solute or solution dispenser and pump unit carried on a person's back by shoulder straps whose upper support effort is transmitted to the tank about a center of gravity designed to be close to the carrier's back on a strain line directed through its volumetric center of gravity as determined by interbraced semi-flexible front and back walls for carrying comfort and with the straps and a liquid eduction tube extending over the shoulders of the carrier while the other ends of the shoulder straps engage the lower corners of the tank. Motion of the tank on the carrier's back maintains wettable powders in solution if any are present.