1. Field of the Invention
The present invention relates to a pump apparatus and more particularly to a pump apparatus having a valve within a piston for a metering and dispensing device that may be used for food products, the device being very efficient, reliable and simply constructed as well as easy to use and to wash.
2. Description of the Related Art
Dispensers for food products are known in the food industry. For example, a dispenser for barbecue sauce is constructed with a piston in a cylinder, an intake check valve and an outlet check valve. A major problem with this dispenser is that the food product being transmitted includes chunks which clog the check valves and require frequent cleaning. This procedure is very time consuming and thus the dispenser is not practical.