Patent ID: 6883565
Filing Date: 2005-04-26
Classification: F04B

Abstract:
1. An air pump for bicycles, comprising: an air storage tank for storing compressed air which is charged thereinto from a manual pump through a tank-charging passage; an air-charge valve for preventing air stored in the air storage tank from reversely flowing toward the manual pump through the tank-charging passage; an air passage which extends from the air storage tank and which is formed at its tip end with an air discharge port which charges air into a bicycle tire; and a valve that can be opened and closed for opening and closing the air passage, wherein the tank-charging passage includes a common passage extending from the air storage tank, and a first branch passage branching from a tip end of the common passage and connected to the manual pump, the air passage includes the common passage, and a second branch passage branching from the tip end of the common passage and connected to the air discharge port, and a switch valve which functions as the air-charge valve and the opened and closed valve is provided on a confluent point between the first branch passage and the second branch passage, the switch valve being switched between a first switch state where the first branch passage and the common passage are brought into communication with each other and a second switch state where the second branch passage and the common passage are brought into communication with each other.