Tire pressure maintenance apparatus and method

An apparatus for pressurizing an inflatable object, comprising:

• a tank, containing a compressed gas;
• an air chuck, in fluid communication with said tank via an enclosed conduit for engaging an inflation valve of said inflatable object to permit fluid communication between said tank and an interior of said inflatable object;
• a first pressure sensor, detecting a gas pressure within said enclosed conduit;
• a first valve, controlling fluid communication in said enclosed conduit between said tank and said first pressure sensor;
• a second valve, controlling fluid communication in said enclosed conduit between said tank and said first pressure sensor in serial with said first valve, wherein said first valve is disposed between said tank and said second valve;
• and
• a controller, sequentially performing the steps of:
• closing said first valve and opening said second valve;
• receiving said gas pressure as an initial pressure when said air chuck engages an inflatable object to permit inflation communication between said interior and said enclosed conduit;
• sending an opening signal to open said first valve;
• waiting for a first time period calculated to cause said gas pressure within said enclosed conduit and said inflatable object to increase to a desired pressure according to a tank pressure in said tank, said initial pressure, and a known delay between sending a closing signal to said second valve and said second valve fully closing;
• and
• immediately sending said closing signal to said second valve after waiting for said first time period, whereby said second valve closes before said first valve would be physically capable of closing.