Leak-proof fastening device
US9574603B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2013 |
| Grant date | Feb 21, 2017 |
| Priority date | — |
| Expiry date | Jan 3, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C65/562
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention pertains to a washer (11) for a female fastener (12, 12A), particularly a nut or collar, said washer comprising an annular base (15) and a substantially cylindrical skirt (13) of an outer periphery of the annular base, said annular base comprising a central orifice (18) coaxial with the axis (14) of the skirt, characterized in that the annular base is at least partially covered with a layer (21) of a viscous composition capable of forming a liquid-tight coating through polymerization.When installing a nut having such a washer onto a male fastener such as a pin (33), the spreading of the viscous layer makes it possible to fill in the gaps (36) of the assembly, the polymerization of the composition ensuring its leak-tightness afterwards.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.