Patent ID: 7270142

Claim:
An apparatus for injecting fluid into an inflatable device, said apparatus comprising: a first chamber capable of being in communication with a supply of fluid, said first chamber being capable of maintaining fluid in said first chamber at a pressure substantially equal to the pressure of said supply fluid; a second chamber capable of communicating with said inflatable device, said second chamber also being capable of communicating with said first chamber, said second chamber also being capable of dynamically maintaining fluid in said second chamber at a pressure substantially equal to the pressure of said inflatable device during an inflation event; a first spring-loaded piston capable of moving in response to said second chamber fluid; a third chamber capable of receiving fluid from said first chamber in response to said motion of said first spring-loaded piston; a second spring-loaded piston capable of moving in response to said third chamber fluid, said motion of said second spring-loaded piston capable of terminating said inflation event substantially simultaneously with the attainment by said second chamber fluid pressure of a predetermined level; a pressure adjuster, said adjuster being capable of providing an operator the ability to adjustably set said predetermined level; a restrictor of the fluid mass flow rate between at least one said first chamber and at least one said second chamber; a first tube having a first and a second end and a plurality of radial through holes distributed around and near said first end; a sphere corresponding to each said radial through hole, each said sphere having a diameter slightly larger than the diameter of said corresponding radial through hole; a second tube having a first and a second end, said first end of said second tube having a funnel shaped entry, said entry being capable of receiving first a second end of said first tube and then said first end of said first tube, said second tube being sized so that each said sphere is held between a said radial through hole in said first end of said first tube and said funnel shaped entry of said second tube when said first tube is located so that said spheres are inside said second tube and near said largest diameter of said funnel shaped entry of said second tube; and a trigger providing an operator the ability to force said second tube onto said first tube while said first end of said first tube is held onto a valve of said inflatable device such that said spheres contact said valve's external surface and exert a circumferential radial force on said valve.