Liquid proportioning system

Claim 1

An apparatus for providing a closely proportioned mixture of at least a first and a second liquid comprising: a first double acting fluid cylinder having a first piston and a piston rod; a positive displacement piston pump; interconnecting means connecting said piston rod with said piston pump whereby movement of said first piston produces pumping movement of said pump; supply and discharge means for supplying said first fluid under pressure to said first cylinder and discharging it therefrom, said supply and discharge means including control means for shifting the supply of said first fluid between opposite sides of said first piston to produce continuous reciprocation of said piston; means for connecting a source of said fluid to said pump; fluid mixing means receiving the discharges from said first fluid cylinder and said pump; and, wherein said interconnecting means include an adjustable lost motion connection between said piston rod and said pump.

Claim 2

An apparatus for providing a closely proportioned mixture of at least a first and a second liquid comprising: a first double acting fluid cylinder having a first piston and a piston rod; a positive displacement piston pump; interconnecting means connecting said piston rod with said piston pump whereby movement of said first piston produces pumping movement of said pump; supply and discharge means for supplying said first fluid under pressure to said first cylinder and discharging it therefrom, said supply and discharge means including control means for shifting the supply of said first fluid between opposite sides of said first piston to produce continuous reciprocation of said piston; means for connecting a source of said fluid to said pump; fluid mixing means receiving the discharges from said first fluid cylinder and said pump; and, wherein said interconnecting means include an adjustable lost motion connection between said piston rod and said pump.

Claim 3

An apparatus for providing a closely proportioned mixture of at least a first and second liquid comprising: a double acting fluid cylinder having a piston mounted for reciprocation therein and a piston rod extending outwardly from at least one end thereof; a second fluid cylinder having a piston mounted therein and a piston rod extending outwardly from at least one end thereof; means interconnecting the piston rods of said first and second cylinders for producing movement of said second cylinder in response to movement of said first cylinder; first supply and discharge means for supplying said first fluid under pressure to said first cylinder and discharging it therefrom, said supply means including control means responsive to movement of at least one of said piston rods for causing said first fluid to be alternately supplied to opposite sides of the piston of said first cylinder and discharged from the other side thereof; second supply and discharge means connected with said second cylinder for connecting said second cylinder with a source of said second fluid and permitting discharge of said second fluid from said second cylinder to a discharge line, said supply and discharge means including valve means whereby reciprocatory movement of said piston of said second cylinder withdraws said second fluid from the source thereof and pumps it to said discharge line; a fluid mixer means; fluid lines connecting the discharge from botH said first and second cylinders to said fluid mixer means; and, said interconnecting means comprising an adjustable means for permitting the length of reciprocation of said piston in said second cylinder to be varied relative to the length of the reciprocation of said piston in said first cylinder to thereby vary the relative proportions of said first and second fluids discharged to said fluid mixer.

Claim 4

An apparatus for providing a closely proportioned mixture of at least a first and second liquid comprising: a double acting fluid cylinder having a piston mounted for reciprocation therein and a piston rod extending outwardly from at least one end thereof; a second fluid cylinder having a piston mounted therein and a piston rod extending outwardly from at least one end thereof; means interconnecting the piston rods of said first and second cylinders for producing movement of said second cylinder in response to movement of said first cylinder; first supply and discharge means for supplying said first fluid under pressure to said first cylinder and discharging it therefrom, said supply means including control means responsive to movement of at least one of said piston rods for causing said first fluid to be alternately supplied to opposite sides of the piston of said first cylinder and discharged from the other side thereof; second supply and discharge means connected with said second cylinder for connecting said second cylinder with a source of said second fluid and permitting discharge of said second fluid from said second cylinder to a discharge line, said supply and discharge means including valve means whereby reciprocatory movement of said piston of said second cylinder withdraws said second fluid from the source thereof and pumps it to said discharge line; a fluid mixer means; fluid lines connecting the discharge from botH said first and second cylinders to said fluid mixer means; and, said interconnecting means comprising an adjustable means for permitting the length of reciprocation of said piston in said second cylinder to be varied relative to the length of the reciprocation of said piston in said first cylinder to thereby vary the relative proportions of said first and second fluids discharged to said fluid mixer.