Patent attributes
A Schrader (American) valve /Presta (French) valve dual-mode valve cap includes a casing having an axle hole and a through hole kept in communication, a rotating device rotatably mounted in the axle hole and having two opposing heads respectively disposed outside the axle hole with a respective screw hole defined therein for the connection of a Schrader (American) valve or Presta (French) valve, an accommodation chamber in communication between the two screw holes, an annular air passage defined in between the rotating device and the casing, a through hole in communication with the annular air passage and the accommodation chamber and two seal rings mounted on the periphery thereof at two sides of the annular air passage, a valve block movable back and forth in the accommodation chamber and having a seal ring mounted on the periphery thereof to divide the accommodation chamber into two spaces, and a spring member stopped between the valve block and a part of the rotating device to force the valve block toward the screw hole for Schrader (American) valve.
