Ultra-low friction air pump for creating oscillatory or pulsed jets
US8714945B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 8, 2011 |
| Grant date | May 6, 2014 |
| Priority date | — |
| Expiry date | Aug 29, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B39/0292
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An air pump positioned within a hollow space in an aerodynamic structure for controlling the flow over an aerodynamic surface thereof, includes a movable member linearly displaced by a very low friction piston mechanism and a compression chamber open to the exterior of the aerodynamic surface through an orifice. Reciprocal displacement of the very low friction movable member changes the volume of the compression chamber to alternately expel fluid (e.g., air) from and pull fluid into the compression chamber through the orifice. The movable member includes a piston oscillating within a piston housing each having an ultra-low friction coating for improved thermal performance and reduced maintenance. Fluid intake to the compression chamber may be increased through the use of a one-way valve located either in the aerodynamic surface, or in the piston. Multiple flapper valves may surround the orifice in the aerodynamic surface for increased fluid control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.