Fluid feeder for pressurized fluid system

Claim 2

Liquid feed apparatus for pressurized liquid systems comprising, diaphragm operated fluid motor means actuated by a supply of liquid under pressure; diaphragm pump means for injecting liquid into a pressurized liquid system; connecting means between said fluid motor means and said pump means; valve means for introducing liquid from said supply of liquid under pressure into said fluid motor means and for withdrawing liquid therefrom; means interconnecting said valve means with said connecting means for actuating said valve means on movement of said connecting means; an open reservoir separate from the supply of liquid under pressure; means for introducing liquid from said reservoir into said pump means; means separated from liquid in said reservoir for introducing liquid into said reservoir from the discharge outlet of said fluid motor means; and spring biasing means biasing said fluid motor means towards undistented position.

Claim 3

Liquid feed apparatus according to claim 1, wherein said means interconnecting said valve means with said connEcting means is spring loaded to provide a snap action of said valve.

Claim 4

Liquid feed apparatus according to claim 2 wherein said means interconnecting is a pivoted lever with one end of said lever including a yoke around said connecting means, and including stops on said connecting means to permit limited free movement of said yoke thereon.

Claim 5

Liquid feed apparatus according to claim 1 wherein said valve means includes a three-way rotary valve.

Claim 6

Liquid feed apparatus according to claim 1 wherein valve means includes a pair of spaced-apart valve seats, a pair of spaced-apart valve closure members, and a valve shaft connecting said pair of valve closure members so that one said valve closure member is not seated when the other is seated.

Claim 7

Liquid feed apparatus according to claim 5 wherein one said valve closure member has more effective surface area exposed to liquid than the other said valve closure member for maintaining said smaller valve open when said larger valve closure member is closed.

Claim 8

Liquid feed apparatus according to claim 6 further characterized by an extension on said valve shaft from said smaller valve closure member on the side opposite said larger valve closure member, piston means mounted on said shaft extension, a cylinder reciprocably receiving said piston, said cylinder being open at one end, and said piston having an exposed area larger than said larger valve closure member for maintaining said larger valve closure member biased open with the smaller valve closure member shut.

Claim 9

Liquid feed apparatus according to claim 1 wherein said fluid motor and said pump are mounted spacedly in a common housing, and said housing from said reservoir.

Claim 10

Liquid feeds apparatus according to claim 1 being further characterized by means for introducing a predetermined amount of chemicals into the liquid in said reservoir.

Claim 11

Liquid feed apparatus according to claim 1 wherein said supply of liquid is a potable water supply, said open reservoir is maintained at about atmospheric pressure; and said means for introducing liquid into said reservoir is a conduit exhausting into and spaced above said open reservoir providing an airgap between said water supply and said pressurized liquid system, preventing backflow from said pressurized fluid system into said potable water supply.

Claim 12

Liquid feed apparatus for pressurized liquid systems comprising, a diaphragm operated fluid motor actuated by a supply of liquid under pressure; a diaphragm pump for injecting liquid into a pressurized liquid system; connecting means between said fluid motor and said pump; a pair of spaced-apart valve seats arranged with one seat of said pair of valve seats arranged at the intake of said fluid motor and the other seat of said pair of valve seats arranged at the exhaust of said motor; a pair of spaced-apart valve closure members and a valve shaft mounting said valve closure members such that one said valve closure member is seated when the other is not seated for selectively allowing the introduction of liquid from said supply of liquid under pressure into said fluid motor and the withdrawal of liquid from said fluid motor, one said valve closure member having more effective surface area exposed to liquid than the other for maintaining said smaller valve unseated when said larger valve closure member is seated; means interconnecting said valve shaft with said connecting means for actuating said pair of valve closure members on movement of said connecting means a reservoir separate from said supply of liquid under pressure; means for introducing liquid from said reservoir to said pump; and mans for introducing liquid into said reservoir.

Claim 13

Liquid feed apparatus for pressurized liquid systems comprising, a diaphragm operated fluid motor actuated by a supply of liquid under pressure; a diaphragm pump for injecting liquid into a pressurized liquid system; connecting means between said fluid motor and said pump; a pair of spaced-apart valve seats arranged with one seat of said pair of valve seats arranged at the intake of said fluid motor and the other seat of said pair of valve seats arranged at the exhaust of said motor; a pair of spaced-apart valve closure members and a valve shaft mounting said valve closure members such that one said valve closure member is seated when the other is not seated for selectively allowing the introduction of liquid from said supply of liquid under pressure into said fluid motor and the withdrawal of liquid from said fluid motor, one said valve closure member having more effective surface area exposed to liquid than the other for maintaining said smaller valve unseated when said larger valve closure member is seated; means interconnecting said valve shaft with said connecting means for actuating said pair of valve closure members on movement of said connecting means a reservoir separate from said supply of liquid under pressure; means for introducing liquid from said reservoir to said pump; and mans for introducing liquid into said reservoir.

Claim 14

Liquid feed apparatus according to claim 11 further characterized by an extension on said valve shaft from said smaller valve closure member on the side opposite said larger valve closure member, piston means mounted on said shaft extension, a cylinder reciprocably receiving said piston, said cylinder being open at one end, And said piston having an exposed area larger than said larger valve closure member for maintaining said valve biased not seated with the smaller valve closure member seated.