Low spill high flow quick coupling valve assembly

A coupling valve assembly, comprising:

• a female coupling defining a female coupling fluid passageway, the female coupling member including a female coupling valve which is normally biased into a closed position by a female coupling spring so as to close the female coupling fluid passageway, the female coupling valve including a female coupling slide valve and a female coupling inner body, the female coupling slide valve being disposed in the female coupling for reciprocal movement along a longitudinal axis of the coupling valve assembly, the female coupling spring being isolated from the female coupling fluid passageway;
• a male coupling defining a male coupling fluid passageway, the male coupling including a male coupling valve which is normally biased into a closed position by a male coupling spring so as to close the male coupling fluid passageway, the male coupling valve including a male coupling slide valve, a male coupling outer body, and a male coupling inner body, the male coupling slide valve being disposed in the male coupling for reciprocal movement along the longitudinal axis of the coupling valve assembly, the male coupling spring being isolated from the male coupling fluid passageway;
• the female coupling inner body engaging with the male coupling slide valve and the male coupling outer body engaging with the female coupling slide valve so as to open the fluid passageways;
• a clip assembly having a locking member to lock the male coupling in the female coupling and having an unlocking member to unlock the male coupling from the female coupling wherein the fluid passageways are closed;
• a vent conduit passing through the male coupling inner body and the male coupling outer body to vent air pressure between inside of the coupling valve assembly and outside of the coupling valve assembly so that the air pressure between the inside and outside of the coupling valve assembly is equalized;
• and
• fluid pressure balance means for reducing fluid pressurized area on the male and female coupling slide valves, wherein the fluid pressure balance means includes:
• a first sealing member which seals between the male coupling inner body and the male coupling slide valve, a second sealing member which seals between the female coupling inner body and the male coupling slide valve, a third sealing member which seals between the female coupling slide valve and the male coupling outer body, and a fourth sealing member which seals between the female coupling inner body and the female coupling slide valve.

A coupling valve assembly, comprising:

• a female coupling defining a female coupling fluid passageway, the female coupling including a female coupling valve which is normally biased into a closed position by a female coupling spring so as to close the female coupling fluid passageway, the female coupling valve including a female slide valve, a female coupling inner body, and a female coupling fluid conduit adaptor, the female coupling slide valve being disposed in the female coupling for reciprocal movement along a longitudinal axis of the coupling valve assembly, the female coupling spring being isolated from the female coupling fluid passageway;
• a male coupling defining a male coupling fluid passageway, the male coupling member including a male coupling valve which is normally biased into a closed position by a male spring so as to close the male coupling fluid passageway, the male coupling valve including a male coupling slide valve, a male coupling outer body, and a male coupling inner body, the male coupling slide valve being disposed in the male coupling for reciprocal movement along the longitudinal axis of the valve assembly, the male coupling spring being isolated from the male coupling fluid passageway;
• the female coupling inner body engaging with the male coupling slide valve and the male coupling outer body engaging with the female coupling slide valve so as to open the fluid passageways;
• a clip assembly for locking the male coupling in the female coupling whereby the fluid passageways are open and unlocking the male coupling from the female coupling whereby the fluid passageways are closed;
• and
• a plurality of static seals, disposed on outer walls of the male coupling inner body and female coupling inner body, being deformed to form a seal between the male coupling inner body and the male coupling outer body and between the female coupling inner body and the female coupling fluid conduit adaptor, respectively.