Patent ID: 8402987

Claim:
A Schrader (American) valve /Presta (French) valve dual-mode valve cap, comprising: a casing comprising a body shell, an axle hole extending through two opposing ends of said body shell, an end portion outwardly extended from a periphery of said body shell and a through hole cut through said end portion in communication with said axle hole; a rotating device rotatably accommodated in said axle hole of said body shell of said casing, said rotating device comprising two opposing heads respectively disposed outside said axle hole for grasping by a hand of a person, each of said head defining therein a screw hole, the screw hole of one said heads being adapted for receiving a Presta (French) valve, a screw hole of the other of said heads being adapted for receiving a Schrader (American) valve, an accommodation chamber disposed in communication between the screw hole of each of said two opposing heads, an annular air passage defined in said axle hole in between a periphery of said rotating device and said body shell of said casing corresponding to said end portion, two seal rings respectively mounted on the periphery of said rotating device at two opposite lateral sides of said annular air passage and a through hole in communication between said annular air passage and said accommodation chamber; a valve block accommodated in said accommodation chamber inside said rotating device and movable back and forth therein, said valve block comprising a seal ring mounted on a periphery of said valve block and stopped against an inside wall of said rotating device to divide said accommodation chamber into two spaces and to isolate the two screw holes of the heads of said rotating device from each other and a pin located on one end of said valve block and aimed at the screw hole of said rotating device for the Schrader (American) valve; a spring member mounted in said accommodation chamber of said rotating device and stopped between an inner end wall of the screw hole of said rotating device for said Presta (French) valve and an inner end wall of said valve block to impart a pressure to said valve block toward the screw hole of said rotating device for said Schrader (American) valve and to let the seal ring of said valve block be kept between the through hole of said rotating device and the screw hole of said rotating device for said Schrader (American) valve; and when said Schrader (American) valve is fastened to the screw hole of said rotating device for said Schrader (American) valve, said valve block is forced inwards to carry the seal ring of said valve block over the through hole of said rotating device to the space in between the through hole of said rotating device and the screw hole of said rotating device for said Presta (French) valve.