Patent ID: 9587633
Date: 2017-03-07
CPC Classifications: B60C,F04B,G01L

Claim:
1. A portable pump comprising: a cylinder having a chamber; a nozzle disposed on one end of the cylinder and adapted to be attachable with an inflatable, with the nozzle including a passage adapted to be connectable and in communication with the inflatable, a valve mounted between the cylinder and the nozzle, wherein the valve includes an orifice and a limiting ring, wherein the orifice includes first and second channels connected and in communication with each other, with the first channel unidirectionally connected with the chamber; a piston rod having a rod hole, with one end of the piston rod connected with a piston, and with another end of the piston rod connected with a handle, with the piston slidably disposed and reciprocal inside the chamber for pushing air unidirectionally passing through the valve and the passage into the inflatable, with the handle including a recess; a tube connected with the valve and arranged through the piston rod and the piston, with two opposite ends of the tube respectively connected and in communication with the valve and the rod hole, with two opposite ends of the second channel respectively connected and in communication with the passage and the tube, wherein the limiting ring surrounds the valve and abuts against the chamber, wherein the limiting ring is made of a soft material, with an outer diameter of the limiting ring gradually increasing from an end adjacent to the piston to another end adjacent to the nozzle to cause the first channel of the orifice to be unidirectionally connected with the chamber; and a pressure sensing device disposed in the recess, with the pressure sensing device including a wireless transmission circuit board, a sensing unit, and a power supply unit, with the sensing unit and the power supply unit electrically connected with the wireless transmission circuit board, with the sensing unit measuring an air pressure value of the air flowing into the recess, and with the wireless transmission circuit board connectable with a mobile electronic device via wireless transmission for indicating the air pressure value.