Valve and system for application of a covering product including such a valve
US11396029B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2020 |
| Grant date | Jul 26, 2022 |
| Priority date | — |
| Expiry date | Feb 13, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B9/043
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A valve including a body having an inner central orifice and a chamber, a piston formed by a rod and by a head mounted in the chamber, the rod extending outside the body and moving in a bore of an application system. The valve includes a first sealing device around the rod on one side of the valve where the rod extends outside the body, part of the chamber being filled with a pressurized control fluid to obtain movement of the piston against the force of a spring housed in the body. The valve includes a second sealing device around the rod, between the first sealing device and the chamber. The valve includes a vent duct in the rod that communicates with the inner central orifice between the first and second sealing devices and emerges in the open air or in part of the chamber communicating with the open air.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.