Configuration for forming a ventilation aperture
US6789885B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2000 |
| Grant date | Sep 14, 2004 |
| Priority date | — |
| Expiry date | Feb 4, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/0874
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention pertains to a configuration for forming a ventilation aperture having a small cross section, whereby a sealing part is placed in a passageway and the ventilation aperture is formed between the sealing part and the inner wall of the passageway. In order to simplify manufacturing and, in particular, make possible the use of injection-molded plastic parts throughout, the invention suggests that the sealing part should have a cylindrical stopper that is made of an elastically deformable material and can be inserted into the passageway, and has in its surface shell at least one axially continuous, channel-like depression, the outside diameter of which, when in the unstressed state, is oversized in comparison with the inside diameter of the passageway.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.