Plural component delivery system

An apparatus for mixing and delivering at least two liquid components of a mixture in a selected volume ratio, comprising,

• a first tank for storing a first component;
• a second tank for storing a second component;
• a first rotary pump for pumping the first component from the first tank;
• a second rotary pump for pumping the second component from the second tank;
• first and second motors for driving the first and the second pumps, respectively;
• first and second speed sensing means for monitoring the speeds of the first and the second motors, respectively;
• a first computer for controlling the speed of the first motor, the first computer being adapted to receive signals from the first speed sensing means, and being further adapted to send signals to the first motor to control the speed thereof;
• a second computer for controlling the speed of the second motor, the second computer being adapted to receive signals from the second speed sensing means, and being further adapted to send signals to the second motor to control the speed thereof;
• and
• a delivery device for receiving the at least two components from the respective pumps and for delivering the mixture of the at least two components;
• wherein the first computer is a master computer, and the second computer is a slave computer, such that the slave computer is adapted to be programmed to control the speed of the second motor as a function of the speed of the first motor;
• and wherein operating the first and the second motors at the so-controlled speeds permits the first and the second pumps to deliver the first and the second components, respectively, at substantially the pre-selected volume ratio.

A process for mixing and delivering at least two liquid components of a mixture in a selected volume ratio, comprising the steps of,

• storing a first component in a first tank;
• storing a second component in a second tank;
• pumping the first component from the first tank using a first rotary pump;
• pumping the second component from the second tank using a second rotary pump;
• driving the first and the second pumps with respective first and second motors;
• monitoring the respective speeds of the first and the second motors with respective first and second speed sensing means;
• controlling the speed of the first motor with first control means, the first control means being adapted to receive signals from the first speed sensing means, and being further adapted to send signals to the first motor to control the speed thereof;
• controlling the speed of the second motor with second control means, the second control means being adapted to receive signals from the second speed sensing means, and being further adapted to send signals to the second motor to control the speed thereof;
• and
• delivering the mixture of the at least two components from a delivery device that receives the components pumped from the pumps;
• wherein the first control means is a master control means, and the second control means is a slave control means, such that the slave control means is further adapted to control the speed of the second motor as a function of the speed of the first motor;
• and wherein operating the first and the second motors at the so-controlled speeds permits the first and the second pumps to deliver the first and the second components, respectively, at substantially the pre-selected volume ratio.

A process for mixing and delivering at least two liquid components of a mixture in a selected volume ratio, comprising the steps of,

• storing a first component in a first tank;
• storing a second component in a second tank;
• pumping the first component from the first tank using a first rotary pump;
• pumping the second component from the second tank using a second rotary pump;
• driving the first and the second pumps with respective first and second motors;
• monitoring the respective speeds of the first and the second motors with respective first and second speed sensing means;
• controlling the speed of the first motor with a first computer, the first computer being adapted to receive signals from the first speed sensing means, and being further adapted to send signals to the first motor to control the speed thereof;
• controlling the speed of the second motor with a second computer, the second computer being adapted to receive signals from the second speed sensing means, and being further adapted to send signals to the second motor to control the speed thereof;
• and
• delivering the mixture of the at least two components from a delivery device that receives the components pumped from the pumps;
• wherein the first computer is a master computer, and the second computer is a slave computer, such that the slave computer is adapted to be programmed to control the speed of the second motor as a function of the speed of the first motor;
• and wherein operating the first and the second motors at the so-controlled speeds permits the first and the second pumps to deliver the first and the second components, respectively, at substantially the pre-selected volume ratio.