Quick coupler service fitting

For use in connecting a first fluid holder such as a service hose having first threaded connector means provided with a first core depressor, said first threaded connector means being permanently connected to said service hose and being arranged to be threadedly connected to a second fluid holder such as a service fitting permanently connected to another element and having a depressible core valve, said service fitting further having a second threaded connector means adapted to be releasably connected to said first threaded connector means to cause said first core depressor to cause said depressible core valve to open and provide controlled fluid flow connection between said hose and service fitting, an improved fluid transfer connection structure comprising:

• a first adapter element having threaded means arranged to be threadedly mounted to the service hose connector threaded connector means and having a second core depressor;
• a second adapter element having threaded means arranged to be threadedly mounted to said service fitting threaded connector means;
• and
• means provided a quick mechanical connection of said first adapter to said second adapter with said second core depressor extending through said second adapter element for engaging said depressible core valve to open said core valve and provide facilitated sealed fluid transfer connection of said service hose connector to said service fitting.