Dual-flow air chuck assembly

A dual-flow air chuck assembly for delivering pressurized gas to a valve stem having a valve core, the dual-flow air chuck assembly having a closed-flow operation and an open-flow operation, the dual-flow air chuck assembly comprising:

• a main body including a central passage extending therethrough and having a first end portion opening for interfacing with the valve stem, a second end portion opening for operably coupling to a pressurized gas source, and a closed-flow sealing surface;
• a shuttle axially slidable within the first end portion opening of the central passage, the shuttle having a tip portion configured to interface with a poppet of the valve core to open gas flow through the valve stem;
• a closed-flow spool axially slidable within the central passage and positioned abutting the shuttle, wherein the spool translates axially toward the second end portion opening with the shuttle when the air chuck is pushed onto the valve stem, wherein the spool comprises:
• a sealing protrusion extending radially outward from the spool and positioned to abut the closed-flow sealing surface when the closed-flow spool is in a closed position, and positioned spaced away from the closed-flow sealing surface when the spool translates axially toward the second end portion opening with the shuttle when the air chuck is pushed onto the valve stem;
• and
• a plurality of lateral airflow ports positioned toward the first end portion opening from the sealing protrusion;
• and
• a biasing spring extending within the central passage and operable to bias the shuttle and the spool away from the second end portion opening toward the first end portion opening.

An air chuck assembly for delivering pressurized gas to a valve stem having a valve core, the air chuck assembly comprising:

• a main body including a central passage extending therethrough and having a first end portion opening for interfacing with the valve stem and a second end portion opening for operably coupling to a pressurized gas source, the central passage further comprising an internal bore adjacent to the first end portion opening, and a pair of first and second primary sealing O-rings positioned in the internal bore, wherein the pair of first and second primary sealing O-rings are configured to be positioned adjacent to an end of the valve stem when the air chuck is installed on the valve stem;
• a shuttle positioned within the first end portion opening of the central passage, the shuttle having a tip portion configured to interface with a poppet of the valve core to open gas flow through the valve stem;
• and
• a biasing spring extending within the central passage and operable to bias the shuttle away from the second end portion opening toward the first end portion opening, wherein a spring force of the biasing spring is greater than a spring force biasing the poppet of the valve core toward a closed position such that pushing the air chuck assembly onto the valve stem moves the poppet to an open position before the shuttle translates axially toward the second end portion opening, compressing the biasing spring.