Aerodynamically operated rain cap
US4671171A · kind A · utility
Inventor
Key dates
| Filing date | Dec 31, 1985 |
| Grant date | Jun 9, 1987 |
| Priority date | — |
| Expiry date | Dec 31, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2590/08
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A rain cap or protective cover device for an exhaust stack of an internal combustion engine is disclosed that is movable between a standby protective position and an operating position. In the standby position a pair of rearwardly extending arms cause a fairing of the rain cap to cover an outlet of an exhaust stack to which the rain cap is pivotally connected. In the operating position, winglets connected to the arm interact with air flow past the stack to raise the arms and move the fairing to a conformable position about the exhaust stack. The fairing is shaped to aerodynamically interact with the air flow to establish a low pressure area at the outlet of the exhaust stack.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.