Method and device for protecting a work surface
US6095918A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 1999 |
| Grant date | Aug 1, 2000 |
| Priority date | — |
| Expiry date | Mar 2, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24F3/163
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for closely protecting a workstation. The method includes the steps of (a) providing a horizontal work surface having a top face, an upstream side and a free side opposite the upstream side, the free side having an edge, the work surface being unobstructed and accessible from above the top face and from at least the free side; (b) continuously blowing clean air over the work surface from the upstream side toward the free side so as to form a substantially horizontal flow of the clean air across the work surface and so that the flow of air has a velocity gradient with an upper layer or stream of air having a substantially higher velocity of flow than a lower layer or stream of the air flowing proximal to the top face; and (c) continuously sucking air from the flow of air into a suction intake disposed near the edge of the free side. The apparatus includes (a) an air blower for blowing clean air continuously over the work surface from the upstream side to the free side so as to form a substantially horizontal flow of the clean air across the work surface and so that the flow of air has a velocity gradient with an upper layer or stream of the air having a substa…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.