Apparatus and method for delivering and metering fluids

A metering system for delivering and metering two liquids in predetermined amounts, said metering system comprising:

• (a) a first discrete pumping means comprised of a dual acting piston-cylinder arrangement capable of operating in two directions for pumping a first liquid,
• (b) a second discrete pumping means separated from said first pumping means and comprised of a dual acting piston-cylinder arrangement capable of operating in two directions for pumping a second liquid,
• (c) a mixing station for receiving said two liquids in predetermined amounts,
• (d) a first discrete valve means operatively connected to said first pumping means for receiving said first liquid from a source thereof and for delivery of said first liquid to said first pumping means, said first valve means also receiving the first liquid from said first pumping means when the first valve means is in a first flow position for delivery of said first liquid from said first pumping means and through said first valve means to said mixing station, said first valve being operable in a first flow position when first valve mechanism therein is in a first flow position and being operable in a second flow position when the first valve mechanism is in a second flow position,
• (e) a second discrete valve means operatively connected to said second pumping means for receiving said second liquid from a source thereof and for delivery of said second liquid to said second pumping means when the second valve means is in a first flow position, said second valve means directing the second liquid from said second pumping means and through said second valve means when the second valve means is in the first flow position to said mixing station, said second valve being operable in a first flow position when a second valve mechanism therein is in a first flow position and being operable in a second flow position when the second valve mechanism is in a second flow position,
• (f) an actuating means for controlling operation of said first and second valve means and thereby controlling operation of said first and second pumping means,
• (g) a first actuating arm operatively connecting said actuating means to said first valve means and thereby controlling operation of said first pumping means and said first valve means,
• (h) a second actuating arm operatively connecting said actuating means to said second valve means thereby controlling operation of said second pumping means and said second valve means, said first and second actuating arms being actuated simultaneously by said actuating means such that said first valve is shifted to the first flow position by said first actuating arm simultaneously with the second valve being shifted to the first flow position by the second actuating arm, and that said first valve is shifted to the second flow position by said first actuating arm simultaneously with the second valve being shifted to the second flow position by the second actuating arm,
• (i) a first coupling means operatively connecting said actuating means to said first pumping means to thereby control operation of said first valve means to enable said first pumping means to pump the first liquid to and from said first valve means in a predetermined proportion of the second pumping means pumping the second liquid to and from the second valve means, and
• (j) a separate second coupling means operatively connecting said actuating means to said second pumping means to thereby control operation of said second valve means to enable said second pumping means to pump the second liquid to and from said second valve means in a predetermined proportion of the first pumping means pumping the first liquid to and from the first valve means.

An apparatus for pumping and metering first and second combinable and cooperable liquids which are reactable in order to form a compound resulting therefrom, said apparatus comprising:

• (a) a first four way valve having a valve housing and a valve mechanism located therein to control a first liquid flow in either of first and second liquid flow positions,
• (b) a second four way valve having a valve housing and a second valve mechanism located therein to control a second liquid flow in either of first or second liquid flow positions,
• (c) a first pumping unit operatively connected to said first valve, said first pumping unit being connected to said first valve only by liquid delivery tubes, said first valve being adapted to provide for delivery of the first liquid to said first pumping unit in either of said first or second liquid flow positions and being adapted to receive the first liquid from said first pumping unit in either of said first or second liquid flow positions, said first valve also being adapted to provide for delivery of the first liquid through the first valve to a demand station, said first valve also being arranged so that liquid flow to the demand station may occur simultaneously with liquid flow to the first pumping unit in both of the first and second liquid flow positions,
• (d) a second pumping unit operatively connected to said second valve, said second pumping unit being connected to said second valve only by liquid delivery tubes, said second valve being adapted to provide for delivery of the second liquid to said second pumping unit in either of said first or second liquid flow positions and being adapted to receive the second liquid from the second pumping unit in either of the first or second liquid flow positions, said second valve also being adapted to provide for delivery of the second liquid through the second valve to said demand station, said second valve also being arranged so that liquid flow to the demand station may occur simultaneously with liquid flow to the second pumping unit in both of said first and second liquid flow positions,
• (e) an actuating unit operatively connected to each of said first and second valves, said actuating unit being connected to said first and second valves only by respective first and second actuating arms, said first and second actuating arms being actuated simultaneously by said actuating means such that said first valve is shifted to the first flow position by said first actuating arm simultaneously with the second valve being shifted to the first flow position by the second actuating arm, and that said first valve is shifted to the second flow position by said first actuating arm simultaneously with the second valve being shifted to the second flow position by the second actuating arm, and
• (f) first and second coupling elements located to be actuated by said first and second pumping units and said actuating units also being operatively connected to said first and second pumping units only by said first and second coupling elements.

A metering system for delivering and metering two liquids in predetermined amounts, said metering system comprising:

• (a) a first discrete pumping means comprised of a dual acting piston-cylinder arrangement capable of operating in two directions for pumping a first liquid,
• (b) a second discrete pumping means separated from said first pumping means and comprised of a dual acting piston-cylinder arrangement capable of operating in two directions for pumping a second liquid,
• (c) a mixing station for receiving said two liquids in predetermined amounts,
• (d) a first discrete four way valve having a first valve housing and a first actuable valve mechanism in said first valve housing, said first valve being operable in a first flow position when said first valve mechanism is in a first flow position and being operable in a second flow position when said first valve mechanism is in a second flow position, said first valve being operatively connected to said first pumping means for receiving said first liquid from a source thereof and for delivery of said first liquid to said mixing station, said first valve also receiving the first liquid from said first pumping means when the first valve is in said first flow position for delivery of said first liquid from said first pumping means and through the first valve housing and first valve mechanism of said first valve to said mixing station, said first valve housing and first valve mechanism being arranged so that liquid flow to said first pumping means may occur simultaneously with liquid flow to a receiving-demand means when in both the first flow position and second flow position,
• (e) a second discrete four way valve having a second valve housing and a second actuable valve mechanism in said second valve housing, said second valve being operable in a first flow position when said second valve mechanism is in a first flow position and being operable in a second flow position when said second valve mechanism is in a second flow position, said second valve being operatively connected to said second pumping means for receiving said second liquid from a source thereof and for delivery of said second liquid to said mixing station, said second valve also receiving the second liquid from said second pumping means when the second valve is in the first flow position for delivering of said second liquid from said second pumping means and through the second valve housing and second valve mechanism of said second valve to said mixing station, said second valve housing and second valve mechanism being arranged so that liquid flow to said second pumping means may occur simultaneously with liquid flow to said receiving-demand means when in both the first flow position and second flow position,
• (f) a fluid operable actuating mechanism for controlling operation of said first and second valves and thereby controlling operation of said first and second pumping means,
• (g) a first actuating arm operable by said actuating mechanism and being connected to said first valve for controlling operation of said first valve and hence said first pumping means, said actuating mechanism being connected to said first valve only by said first actuating arm,
• (h) a second actuating arm operable by said actuating mechanism and being connected to said second valve for controlling operation of said second valve and hence said second pumping means, said actuating mechanism being connected to said second valve only by said second actuating arm, said first and second actuating arms being actuated simultaneously by said actuating means such that said first valve is shifted to the first flow position by said first actuating arm simultaneously with the second valve being shifted to the first flow position by the second actuating arm, and that said first valve is shifted to the second flow position by said first actuating arm simultaneously with the second valve being shifted to the second flow position by the second actuating arm,
• (i) a mechanical coupling for connecting the pistons in each of said discrete first and second pumping means together such that said pistons are generally aligned,
• (j) a first fluid operable coupling member operable by said mechanical coupling and being operatively connected to said actuating mechanism to thereby cause said actuating mechanism to control said first valve in response to positions of the pistons in the first and second pumping means to thereby enable the first pumping means to pump the first liquid to and from said first valve in a predetermined proportion of the second pumping means pumping the second liquid to and from the second valve, and
• (k) a second fluid operable coupling member operable by said mechanical coupling and being operatively connected to said actuating mechanism to thereby cause said actuating mechanism to control said second valve in response to positions of the pistons in the first and second pumping means and to thereby enable the second pumping means to pump the second liquid to and from said second valve in a predetermined proportion of the first pumping means pumping the first liquid to and from the first valve.