Smoking article including flow restrictor in hollow tube
US10172386B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 29, 2014 |
| Grant date | Jan 8, 2019 |
| Priority date | — |
| Expiry date | May 22, 2035 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24D3/17
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
There is provided a smoking article comprising a filter. The filter comprises a hollow tube having an inner surface. The filter further comprises a flow restrictor disposed in the hollow tube, and adapted to divert at least a portion of the flow of mainstream smoke between an outer surface of the restrictor and the inner surface of the hollow tube. Furthermore, the filter comprises a retaining element disposed downstream of the flow restrictor, the retaining element having one or more openings. Each of the openings of the retaining element has at least one cross-sectional dimension that is smaller than the smallest cross-sectional dimension of the flow restrictor to prevent the flow restrictor from moving downstream of the retaining element. The flow restrictor is substantially spherical, at least one cross-sectional dimension of the one or more openings of the retaining element being smaller than the diameter of the flow restrictor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.