Pumping device that is operated easily and safely
US8419376B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Oct 29, 2010 |
| Grant date | Apr 16, 2013 |
| Priority date | — |
| Expiry date | Nov 5, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B9/14
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A pumping device includes a barrel, a top cover mounted on the top of the barrel, a first switching valve mounted on the top cover, a base mounted on the bottom of the barrel, a second switching valve mounted on the base, a cylinder connected between the top cover and the base, a piston movably mounted in the cylinder, a plurality of check valves mounted on the piston, an operation unit connected with the piston, and a conduit connected between the barrel and the base. Thus, a user has to pull or push the first switching valve and the second switching valve simultaneously to extract or suck the fluid in the barrel so as to deflate or inflate the barrel so that the pumping device has a security process and is operated in a safer manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.