Binks Manufacturing Company

Other

Binks Sames Corporation

Christopher L Strong

Jeffrey D Bert

A pressure regulated electric pump is characterized by a positive displacement double acting reciprocating pump driven by an electric motor through a planetary roller screw. A controller senses the pressure of liquid at an outlet from the pump and varies the speed of the motor in a manner to maintain the pressure substantially constant. At a constant flow demand from the pump the motor is operated at a substantially constant speed. As flow demand rises and fans the instantaneous pump outlet pressure falls and rises. The changing pressure is sensed by the controller which makes incremental changes in the speed of the motor to cause the motor to speed up during a pressure fall and to slow down during a pressure rise, in such manner as to maintain pump outlet pressure substantially constant. Using a planetary roller screw to couple the electric motor rotary output to the pump provides a load torque on the motor that is directly proportional to pump outlet pressure plus frictional losses in the pump and drive mechanism. The result is a decrease in the magnitude of pressure drops and spikes in the pumped liquid at the time of changeover of the pump, i.e., at the time the direction of reciprocation of the pump changes.

Pressure regulated electric pump

A plural component airless spray gun for reactive liquid materials has a mix chamber into which coreactive liquid components are introduced and mixed, an airless tip at a forward outlet from the chamber from which the mixed components are emitted in a fan-shaped spray, and a mechanically operated purge rod for cleaning residual reactants from the mix chamber and airless tip. The purge rod has a main body of a diameter slightly less than that of the mix chamber and a probe at its forward end that geometrically conforms to and is adapted to enter into and clean the inside of the spray tip. During spraying the purge rod is retracted in the mix chamber rearwardly of liquid reactant inlets to the chamber. Upon completion of spraying or periodically as desired, the purge rod is moved forwardly to clean the mix chamber and the inside of the airless tip of residual reactive components. To prevent damage to the airless tip should the probe of the purge rod encounter cured material within the tip or the tip itself as the purge rod is moved forward, the purge rod is moved forward by a piston assembly that is structured to decrease the forward driving force exerted on the purge rod when its probe is in the airless tip.

Plural component airless spray gun with mechanical purge

An agitator for a paint mix tank is characterized by a paddle that has passages in it extending between opposite sides thereof and that is reciprocated up and down in the tank to keep the paint mixed and pigments and fillers in the paint in suspension. The paddle is reciprocated in the tank in linear directions generally along paths through its passages. Reciprocation is provided by a motor operating through a gearbox, and the speed of the motor is adjustable to control the reciprocation rate of the paddle. The passages through the paddle improve its agitation performance and enable its linear speed to be sufficiently low during agitation of the paint to eliminate foaming of and entrapment of air in the paint. A process is also dislosed for mixing the liquid contents of the tank without foaming and aeration by providing the above apparatus.

Reciprocating mix tank agitator and process for mixing the liquid

A pressure regulated electric pump is characterized by a positive displacement double acting reciprocating pump driven by an electric motor through a planetary roller screw. A controller senses the pressure of liquid at an outlet from the pump and varies the speed of the motor in a manner to maintain the pressure substantially constant. At a constant flow demand from the pump the motor is operated at a substantially constant speed. As flow demand rises and falls the instantaneous pump outlet pressure falls and rises. The changing pressure is sensed by the controller which makes incremental changes in the speed of the motor to cause the motor to speed up during a pressure fall and to slow down during a pressure rise, in such manner as to maintain pump outlet pressure substantially constant. Using a planetary roller screw to couple the electric motor rotary output to the pump provides a load torque on the motor that is directly proportional to pump outlet pressure plus frictional losses in the pump and drive mechanism. The result is a decrease in the magnitude of pressure drops and spikes in the pumped liquid at the time of changeover of the pump, i.e., at the time the direction of reciprocation of the pump changes.

Growing community of inventors

Boulder, CO, United States of America

Christopher L Strong