Outside filter, in particular for aquarium
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 13, 2001
Grant Date -
N/A
app pub date -
Mar 30, 1999
filing date -
Mar 31, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An outside filter for an aquarium has a housing having an inner chamber, a removable cover for closing the inner chamber of the housing, a supply conduit for supplying water to be filtered into the inner chamber of the housing, a withdrawal conduit for withdrawing the water from the inner chamber of the housing, a motor-operated pump for withdrawing the filtered water, a device for producing a vacuum for aspirating water with air which is contained in the supply conduit during a displacement, the inner chamber of the housing together with the discharge conduit forming a system which communicates with the supply conduit and during the production of the vacuum is hermetically sealingly closed from outside and serves as an evacuatable pressure chamber, the device for producing the vacuum inside the system which is closed.
First Claim
Other Claims data not available
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International Classification(s)
Cited Art Landscape
Patent Citation Ranking
- 22 Citation Count
- B01D Class
- 78.13 % this patent is cited more than
- 24 Age