Abstract: A pressure/vacuum generator is established by coupling the pressure port of a vacuum generator to an air pressure source while coupling a valve in fluid communication with the exhaust port of the vacuum generator. When the valve is in a normally open condition (i.e, the exhaust vented to atmosphere), the vacuum port of the pressure/vacuum generator generates a vacuum. When the valve is closed, thereby closing off the exhaust port, the vacuum port becomes a pressure port. Thus, this pressure/vacuum generator can be used in any number of fluid (liquid and gas) systems (e.g., fluid recovery system, fluid transfer system, etc.)that require both a pressure source and a vacuum source while using a minimum number of components.

Abstract: A grease lubricating system includes a plurality of injectors for distributing grease to a plurality of lubrication points, an injector reset valve for resetting the injectors and a pump for supplying grease. The injector reset valve is located between the pump and the plurality of injectors and includes a piston and a large heavy duty spring which urges the piston into sealing engagement with an inlet port of the injector reset valve during a reset position of the valve. During a pressurizing portion of a pump cycle, grease entering the injector reset valve moves the piston out of sealing engagement with the inlet port of the injector reset valve enabling grease to flow from the inlet port through an internal chamber of the injector reset valve and out of a outlet port to input ports of the injectors through an injector distribution junction. Each injector then delivers grease to its respective lubrication point.