Abstract: A bike having an automatic landing wheel apparatus includes a left landing wheel arm on the left side of the bike to vertically move a left landing wheel rotatably coupled to the lower end portion thereof. A right landing wheel arm on the right side of the bike vertically moves a right landing wheel rotatably coupled to the lower end portion thereof. A left driving unit drives the left landing wheel arm to move the left landing wheel upward and downward. A right driving unit drives the right landing wheel arm to move the right landing wheel upward and downward. A speed detection unit detects the speed of the bike. A controller is connected with the speed detection unit, the left driving unit, and the right driving unit to move the left and right landing wheels upward or downward in response to the detected speed of the bike.

Abstract: A bike having an expanded knife ski device includes left and right landing wheel arms on the left and right portions of the bike, respectively. Left and right landing wheels are rotatably coupled to the lower end of the left and right landing wheel arm, respectively, to move the landing wheels up and down. Left and right driving units lift and lower the left and right landing wheels, respectively. Left and right ski mounting sockets are coupled to the left and right landing wheel arms, respectively. Left and right insertion members couple to the left and right ski mounting sockets, respectively. Left and right ski legs are integrally coupled to the left and right insertion members, respectively, to extend downwards. Left and right bike skis, which are hinge-coupled to the lower end of the left and right ski legs, respectively, each making a hinge movement about a left/right horizontal axis.

Abstract: A bike having an energy recovery device includes a driving wheel that is coupled to a rear wheel driving shaft pulley of the bike and rotates with the rear wheel of the bike. When a wire is pulled by the bike rider, an outer peripheral surface of a rotating wheel contacts an outer peripheral surface of the driving wheel and rotates together by means of friction with the driving wheel. When the wire pulling force is released, contact with the driving wheel is released. A piston moves in the forward/backward direction inside a cylinder of a compressor. During operation, air is compressed by the movement of the piston, exits through an exhaust opening formed on the rear portion of the cylinder, and is stored in an air tank through an air hose.

Abstract: The present invention relates to a bike having an energy recovery device, comprising: a driving wheel coupled to a rear wheel driving shaft pulley of the bike such that, when the rear wheel of the bike rotates, the same rotates together; a wire configured such that, when the bike driver operates a wire pulling means, the same is pulled to the front; a compressor support portion coupled to the rear end of the wire such that, when the wire is pulled, the same makes a hinge movement about a hinge shaft; a rotating wheel rotatably coupled to the compressor support portion and configured such that, when the compressor support portion is pulled to the end by the wire, the outer peripheral surface of the rotating wheel contacts the outer peripheral surface of the driving wheel by means of the hinge movement of the compressor support portion and rotates together by means of friction with the driving wheel and, when the wire pulling force is released, contact with the driving wheel is released; a compressor comprising

Abstract: The present invention relates to a bike having an expanded knife ski device.

Abstract: The present invention relates to a bike having an automatic landing wheel apparatus.

Abstract: An entrance and exit management system allows a passenger having a reservation ticket to instantly get into an airplane by automatically ascertaining a reservation state of the passenger. The entrance and exit management system has a portable electronic identification card storing recognition codes of a person having the portable electronic identification card and making a communication with an external device through a Bluetooth communication module and a contact-type communication port or a wired communication port, a plurality of communication modules installed in an entrance region while forming a predetermined interval therebetween so as to communicate with the Bluetooth module and either communication port, a terminal for checking a personal identity, and an entrance and exit management server receiving the recognition codes to compare them with pre-registered information.

Abstract: A system for managing a plurality of vending machines from a main vending machine using a management network, without the need to periodically visit and check all the machines, and effectively managing a plurality of vending machines even from a remote place using a wire or wireless Internet system. The main vending machine includes a controller for controlling a vending machine mechanism and processing data transmitted from each sub-vending machine to store it in a memory: a Bluetooth communication module for transmitting various data from each sub-vending machine to the controller; a display for displaying sales and management information of each sub-vending machine, s a moving picture outputted by a graphic controller according to a signal outputted from the controller; and a keypad for controlling the controller and the display and selecting items.

Abstract: A charge settlement system is capable of settling a charge, even during movement, without access to any card-inquiry terminal such as a magnetic credit card. The system is relatively inexpensive to construct and includes a transaction terminal and a portable wireless settlement device. When the transaction terminal requests a payment to the portable wireless settlement device via a communication network, the portable wireless settlement device accesses a server via a wireless communication network for settlement. The portable wireless settlement device includes wireless communication with a transaction terminal; a button section for payment and receipt; a key-entering section; a display device for displaying various kinds of information; and a controller having various types of data stored therein.