Free piston vacuum producing apparatus
US7467607B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Dec 12, 2002 |
| Grant date | Dec 23, 2008 |
| Priority date | — |
| Expiry date | Dec 14, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B71/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The free piston vacuum producing apparatus is an internal combustion device with no piston rod or constraining mechanism attached to the free piston. After fuel ignition the piston is rapidly propelled toward the open end of a cylinder. As the combustion gases expand, the piston's momentum propels it past the point where the pressure is equal on both sides of the piston. A vacuum is created in the cylinder behind the piston. When the piston comes to a stop, the vacuum in the cylinder is secured. An air/gas/vapor entry port into the cylinder is then opened to allow outside air, gas, or vapors to enter the cylinder. The gases drawn into the cylinder's vacuum pass through a device, such as a turbine, in order to produce work or energy from the flowing gases. The cylinder's vacuum can thus be used as the basis for vacuum pumps, evaporators, or gas evacuation device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.