A system for metering and dispensing single and plural component liquids and solids as described herein. The dispensing system has a microprocessor-based control system and progressive cavity pumps which provide a very accurate control of component ratios, shot sizes, flow rates and dispense durations....http://www.google.com/patents/US6675988?utm_source=gb-gplus-sharePatent US6675988 - Apparatus for dispensing liquids and solids
