Smoke filtering and cooling device
US4357948A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 1980 |
| Grant date | Nov 9, 1982 |
| Priority date | — |
| Expiry date | Dec 11, 2000 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24F1/30
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A smoke filtering and cooling device is removably mounted within a cylindrical vertical passage in a tobacco smoking water pipe through which smoke is upwardly directed. The device comprises a selectively expandable/retractable portion which is engageable with the passage wall whereby the device is mechanically supported and a fluid-tight seal is provided so that a quantity of water can be retained in the passage around the device. The device further comprises or defines passageways whereby the smoke is directed through the water for filtering and cooling as it passes through the pipe. A plurality of devices may be arranged one above another in the same water pipe to increase efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.