Patent ID: 9239046
Filing Date: 2016-01-19
CPC Classification: F04B,G01L

Claim Text:
1. An air pump for measuring an air pressure comprising: a base including a chamber room; a one-way valve disposed at an inner side of said base and including an inlet chamber and a vent; a pump pipe including a pipe hole with one end thereof connected to said vent and an air faucet disposed at the other end thereof; a piezometer disposed in said chamber room for measuring an air pressure value of said vent; a scale plate disposed at a top surface of said base for displaying said air pressure value of said piezometer, said scale plate further including an air-guiding hole communicating with said inlet chamber; a cylinder fixed on said scale plate and including a cylinder hole communicating with said air-guiding hole; a piston slidably disposed in said cylinder hole; and a driving stem applied to drive said piston to pump gas in said cylinder hole so that said gas is forced to enter said inlet chamber of said one-way valve via said air-guiding hole to allow said vent to deliver said gas to said pump pipe and said piezometer unidirectionally so that said scale plate displays said air pressure value of said gas.