Patent ID: 7032611

Claim:
A pressure regulator for connecting a pressure source to an inflatable object, comprising: a hollow casing having a fluid inlet end, a fluid outlet end, and a side wall; a valve system positioned inside the hollow casing; a fluid inlet connected to the valve system, the inlet located at the fluid inlet end of the hollow casing and adaptable for connection to a pressure source; a fluid outlet located at the fluid outlet end of the hollow casing, the outlet adaptable for connection to an inflatable object; a fluid conduit positioned inside the hollow casing between the fluid inlet and the fluid outlet; a pressure-sensing structure attached to the conduit, the pressure-sensing structure movable inside the hollow casing in the longitudinal direction; and a pressure-generating structure disposed inside the hollow casing and attached to the pressure-sensing structure, the pressure-generating structure capable of exerting a bias force upon the pressure-sensing structure in proportion to a desired pressure in the inflatable object; wherein the valve system is actuated by the conduit which moves longitudinally with the pressure-sensing structure in response to the pressure differential between the two sides of the pressure-sensing structure, capable of preventing the force produced by the pressure source from transferring to the pressure-sensing structure when the valve system is in close state; wherein the pressure regulator is capable of inflating the object when the initial pressure inside the inflatable object is lower than the desired pressure, and the pressure regulator is capable of automatically terminating inflation when the pressure inside the object reaches the desired pressure.