Air pump capable of inflating and deflating an inflatable object interchangeably
US6422832B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Mar 27, 2001 |
| Grant date | Jul 23, 2002 |
| Priority date | — |
| Expiry date | Mar 27, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B33/00
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An air pump is capable of inflating and deflating an inflatable object and is formed of a main body having a cylinder duct, an air outlet and an air inlet in communication with the cylinder duct. The air in the cylinder duct is let out via the air outlet. The atmospheric air is let into the cylinder duct via the air inlet. Two check valves are disposed respectively at the air outlet and the air inlet. A compressing member has a piston which is movably disposed in the cylinder duct of the main body. An adjustment member is pivoted to the main body such that the adjustment member is displaced between a first position and a second position, so as to enable the adjustment member to be in communication with the air outlet or the air inlet to bring about the inflating function or the deflating function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.