Dispensing device and method for introducing fluid into high pressure lines

Claim 2

A container for charging fluid into a pressurized refrigeration system comprising: a. a flexible body portion containing a supply of the fluid to be charged into the pressurized refrigeration system and being of the type which is squeezed by hand to express fluid through a spout, said body portion having insufficient strength to withstand the pressure of the refrigeration system; b. a dispenser portion capable of withstanding the pressure of the refrigeration system, said dispenser portion having a section defining a pump chamber between a first end disposed in fluid tight relationship about said spout and a second end, at least part of said section being flexible; c. means carried by said first end including a check valve for isolating said body portion from the pressure of the refrigeration system; and d. means carried by said second end for atTaching said dispenser portion to a refrigeration system charging valve whereby said body portion is manually squeezed to transfer a quantity of fluid into said pump chamber and thereafter said flexible part of said dispenser section is squeezed to force fluid from said pump chamber and into the refrigeration system against the pressure of the system.

Claim 3

A container as set forth in claim 1 including a check valve in said second end, said pump chamber being defined by the section of said dispenser between said check valves.

Claim 4

A container as set forth in claim 1 wherein said check valve includes a stem portion extending into said spout and said first end is disposed over said spout.

Claim 5

A container as set forth in claim 3 wherein said means carried by said first end includes a metal band embracing said first end at said check valve for clamping said check valve and dispenser portion together in a fluid tight relationship.

Claim 6

A container as set forth in claim 1 wherein said means carried by said second end comprises: a. a flair fitting having a portion disposed in said second end and a threaded nozzle portion adapted to connect said container to a refrigeration system charging valve; b. a check valve in said second end; and c. a metal band embracing said first end at said flair fitting and check valve for clamping the same and said dispenser portion together in a fluid tight relationship.

Claim 7

A container as set forth in claim 5 wherein the nozzle portion of said flare fitting is provided with external threads for connecting said dispenser portion to one end of a charging hose, said hose having its other end adapted to connect to a refrigeration system charging valve.

Claim 8

A dispenser for charging fluid into a pressurized refrigeration system comprising: a. a flexible body portion containing a supply of the fluid to be charged into the system, said body portion having a strength insufficient to withstand the pressure of the system and being of a type which is manually squeezed to express fluid through a container spout; b. a section of hose having a first end disposed in fluid tight relationship about said spout, said hose being flexible and having a strength sufficient to withstand the pressure of the system; c. first and second spaced check valves in said hose arranged to permit one-way flow of fluid from said body portion and through said hose, said spaced check valves and a section of said hose therebetween defining a pump chamber; d. a flair fitting carried by the second end of said hose, said fitting having a portion, which includes said second check valve, extending into said hose, and an externally threaded discharge portion for connecting said fitting to a refrigeration system charging valve; and e. a metal band about each end of said hose, one band embracing said flair fitting and one band embracing said first check valve wherein said metal bands clamp said hose in a fluid tight relationship against said flair fitting and first check valve respectively, said first check valve and its embracing metal band acting to isolate said body portion from pressures generated in said pump chamber; whereby manually squeezing said body portion expresses fluid through said spout and into said pump chamber and thereafter squeezing said hose section forces fluid from said pump chamber and through said threaded discharge portion.

Claim 9

A dispenser for charging fluid into a pressurized refrigeration system comprising: a. a flexible body portion containing a supply of the fluid to be charged into the system, said body portion having a strength insufficient to withstand the pressure of the system and being of a type which is manually squeezed to express fluid through a container spout; b. a section of hose having a first end disposed in fluid tight relationship about said spout, said hose being flexible and having a strength sufficient to withstand the pressure of the system; c. first and second spaced check valves in said hose arranged to permit one-way flow of fluid from said body portion and through said hose, said spaced check valves and a section of said hose therebetween defining a pump chamber; d. a flair fitting carried by the second end of said hose, said fitting having a portion, which includes said second check valve, extending into said hose, and an externally threaded discharge portion for connecting said fitting to a refrigeration system charging valve; and e. a metal band about each end of said hose, one band embracing said flair fitting and one band embracing said first check valve wherein said metal bands clamp said hose in a fluid tight relationship against said flair fitting and first check valve respectively, said first check valve and its embracing metal band acting to isolate said body portion from pressures generated in said pump chamber; whereby manually squeezing said body portion expresses fluid through said spout and into said pump chamber and thereafter squeezing said hose section forces fluid from said pump chamber and through said threaded discharge portion.

Claim 10

A dispenser as set forth in claim 7 wherein the volume of said pump chamber is known and provides means for measuring the amount of fluid introduced into the refrigeration system.

Claim 13

A method as set forth in claim 9 wherein steps (c) and (d) are performed in sequence after the steps of: a. threadably connecting said threaded flair fitting to one end of a standard charging hose the second end of said hose being open; b. purging air from said bottle dispenser portion and charging hose by manually squeezing said bottle until fluid from said container appears at the open second end of said hose; and c. threadably connecting the second end of said hose to said refrigeration system charging valve.