The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 27, 1990
Filed:
Feb. 17, 1989
Applicant:
Inventor:
Hideki Tanaka, Hyogo, JP;
Assignee:
Kabushiki Kobe Seiko Sho, Kobe, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01F / ;
U.S. Cl.
CPC ...
2102212 ; 2102422 ; 261 77 ; 261120 ;
Abstract
A pluri-tubular aerator includes a vertical central tube member, at least one outer tube member disposed concentrically around said central tube member, and at least one of an diffuser and an air tank disposed on an lower end of the aerator for delivering externally supplied air into the central tube member or a space between the central and outer tube members. The diffuser produces a continuous stream of fine air bubbles while the air tank intermittently produces a bulky air bubble of either a spherical shape or a ring-shape. Preferably, the diffuser and the air tank are used concurrently.