Accessory for air blast and device equipped with accessory
US7337991B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Jan 15, 2004 |
| Grant date | Mar 4, 2008 |
| Priority date | — |
| Expiry date | Jul 27, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15D1/08
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The invention relates to an accessory adapted to be mounted on the end of an outlet conduit (4) of an air blast device (1). The accessory is in the form of a tube having an inlet, an outlet and a central passage therethrough, the axial passage or tube being mounted coaxially to the axis of the outlet conduit. The tube has a cross-sectional area that first decreases in the direction (F) in which the air is discharged from the air blast device and a cross-sectional area that then increases in the direction F, thus forming a convergent segment (A) followed by a divergent segment (B). The air blast device is of the type having an evacuation control valve disposed between its inlet and outlet for controlling air flow contained in a chamber or reservoir.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.