Method and fluidic apparatus for generating pulsed and oscillating air flow for surface cleaning and sweeping
US10066351B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 2017 |
| Grant date | Sep 4, 2018 |
| Priority date | — |
| Expiry date | Aug 25, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B1/08
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An oscillating or pulsing fluid stream, or flow 18, 132, 300, is produced from a flow of pressurized air by fluidic apparatus 10, 100, 130, 180, 220 in a device 250 configured for use in surface cleaning, sweeping, lawn care applications, and the like. Converging inlet chamber walls 20, 22, define a tapered internal lumen having a smooth narrowing profile is configured to generate at a power nozzle 44 a high velocity stream with minimal pressure drop. Downstream of the power nozzle, first and second control ports CP1, CP2 are in fluid communication with the high velocity stream 46 and with each other via an inertance loop 72 having a lumen of selected cross sectional area and length. The varying air flow is directed through an outlet chamber 14, 134 shaped to produce an oscillating flow 18 or a pulsating flow 132.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.