Patent ID: 7624752

Claim:
An inflation valve to be mounted on an object for pumping an amount of air into said object via said inflation valve, comprising: a hollow sleeve in the form of a hollow tubular member being provided at a bottom with a central opening, an inner space of said hollow sleeve above said central opening being divided into a first chamber and a second chamber located above and communicable with said first chamber, and on an inner wall surface at a joint of said first and said second chamber with a beveled stop shoulder; a first valve body being located in said first chamber and in the form of a long stem having a conical head; said first valve body being provided at a lower end with a radially outward flange, below which a first compression spring is provided to elastically axially displace said first valve body in said first chamber; a second valve body being located in said second chamber and defining a through hole extended along an axis thereof, such that said head of said first valve body is fitly received in said through hole; a second compression spring being provided above said second valve body to apply an elastic force against said second valve body, so that said second valve body is able to elastically axially displace in said second chamber; said second valve body being formed around an outer wall surface closely below an upper end thereof with a downward and inward inclined section corresponding to a first annular groove formed on an inner wall surface of said second chamber; a first airtight gasket being mounted in said first annular groove, such that when said second valve body is moved downward by the elastic force of said second compression spring, said inclined section may be pressed against said first airtight gasket; at least one release port being formed on a wall of the second chamber between said inclined section and said beveled stop shoulder to communicate the inner space of said hollow sleeve with an external space; said second valve body being further formed around the outer wall surface closely above a lower end thereof with a second annular groove for receiving a second airtight gasket therein, such that said second airtight gasket is located corresponding to said beveled stop shoulder; an air inlet connector being axially mounted to an upper end of said second chamber of said hollow sleeve, and defining along an axis thereof an air inlet having a second internally threaded section provided around an inner peripheral wall thereof; and said air inlet connector being provided around an outer wall surface with a first externally threaded section; and a central pin assembly being mounted in said air inlet with a lower end fixedly connected to said head of said first valve body, so as to push said first valve body downward.