Abstract: A wireless virtual storage apparatus and a remote file accessing method are utilized for a multimedia electronic device accessing remote files in a remote database. The apparatus includes a wireless network interface, microprocessor, and bus interface. The microprocessor runs a file system program, so as to create a virtual partition. Then the processor connects to a removable storage media reader of the multimedia electronic device via the bus interface, and the virtual partition is mounted by the multimedia electronic device. The microprocessor logs in the remote database via the wireless network interface, and creates virtual files in the virtual partition corresponding to the remote files. When the multimedia electronic device accessing the virtual files, the microprocessor loads the remote files from the remote database and changes the accessing path of the multimedia electronic device to the loaded remote files.

Abstract: A piston includes a cylindrical body having a neck formed on an outer periphery of the cylindrical body so as to form a first annular disk and a second annular connecting to the first annular disk via the neck, multiple through holes defined through the second annular disk to communicate with a first space among the second annular disk, the neck and the first annular disk, an annular recess defined in an outer periphery of the second annular disk and multiple slits defined through a bottom face defining the annular recess to communicate with a second space below the first annular disk after passing through the neck.

Abstract: A piston includes a cylindrical body having a neck formed on an outer periphery of the cylindrical body so as to form a first annular disk and a second annular connecting to the first annular disk via the neck, multiple through holes defined through the second annular disk to communicate with a first space among the second annular disk, the neck and the first annular disk, an annular recess defined in an outer periphery of the second annular disk and multiple slits defined through a bottom face defining the annular recess to communicate with a second space below the first annular disk after passing through the neck.