Vent structure for flush water holding tank of vehicle toilets
US4805660A · kind A · utility
13Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 9, 1987 |
| Grant date | Feb 21, 1989 |
| Priority date | — |
| Expiry date | Nov 9, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/3099
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An improved vent structure for a toilet which is normally open but automatically closable depending on the water level whereby to prevent unwanted spills allows air to escape from the interior of a flush water holding tank. A cruciform shaped stem including a buoyant body attached thereto reciprocates in a bore, and a seal, provided by an interior bellows or by the buoyant body, closes the air path when the stem is buoyed upwardly by a rise in the water level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.