Filter cartridge for an undergravel aquarium filter
US4894151A · kind A · utility
15Cited by
13References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 12, 1988 |
| Grant date | Jan 16, 1990 |
| Priority date | — |
| Expiry date | Oct 12, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01K63/045
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An undergravel filter of an aquarium tank served by a power head to suck water from a chamber located beneath the undergravel filter to circulate this water into the tank. A riser tube connects the filter with the power head and contains a carbon cartridge, fixed to the power head. The carbon cartridge is perforated and has a substantially conical configuration. The cartridge is filled with carbon which provides chemical filtration of the water before it is returned into the aquarium tank.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.