Air stone

Details Air stone Air stone

1985-10-04

1987-04-07

Metz, Andrew H.

Liquid purification or separation

Structural installation

Closed circulating system

2104161, 2104162, 2102212, 261124, 119 5, E04H 316, E04H 320

Patent

active

046559159

ABSTRACT:
An air stone for use in aquariums for aeration of the water contained therein comprising a hollow tube for receiving air under pressure and holes for the discharge of the air. The opposite end of the tube is closed off by a solid portion which is threaded. Adjacent to the tube end for receiving the air is a stop means and a plurality of annular disks which are located on the tube downstream from the stop means. A pair of nuts are employed threaded on the lower end, solid tube portion to compress the disks and thereby controlling the size of the bubbles emanating from between the disks.

REFERENCES:
patent: 2770319 (1956-12-01), Hagenbook
patent: 2917295 (1959-12-01), Hauer
patent: 3160588 (1984-12-01), Alarie
patent: 3321082 (1967-05-01), Willinger
patent: 3782549 (1974-01-01), Mullen

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