Undergravel aquarium filter
US4148730A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 3, 1977 |
| Grant date | Apr 10, 1979 |
| Priority date | — |
| Expiry date | May 3, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01K63/045
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An undergravel aquarium filter having a housing assembly which can be positioned on an aquarium tank floor underneath the gravel bed and forms a water compartment between the housing and the floor. The housing assembly includes separable inner and outer sections in fluid flow communication with each other. An upwardly extending enclosure formed on the inner section includes air inlet and outlet members. An air stream supply is provided through the inlet member to a mixing chamber within the enclosure, thereby causing water from the tank to enter the water compartment after passing through the gravel bed, and therefrom the water and air can egress through the outlet member. Seats formed in the housing assembly can accommodate the feet supporting an air pump, whereby the air pump can be easily positioned on the housing assembly during packaging. A groove formed between the inner and outer sections accommodates passage therethrough of the pump line cord during storage of the line cord within the inner section. An air hose can be stored in the outer section. Extension funnels for the outlet member can be stored between the enclosure and the air pump. This convenient integration of the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.