Ventilation – Chimney or stack – Chimneytop or stacktop structure
Patent
1995-07-10
1996-11-05
Joyce, Harold
Ventilation
Chimney or stack
Chimneytop or stacktop structure
454366, F23L 1710
Patent
active
055710450
ABSTRACT:
A user assemblable turbine air pump includes mainly a top lid, an axle assembly, a bottom seat plate, a blade supporting ring, three blade supports, four bottom seat supporting legs and a plurality of blades, these are classified and lapped in a styrofoam made box.
REFERENCES:
patent: 3267833 (1966-08-01), Artis et al.
patent: 3392659 (1968-07-01), Rousey
patent: 3797374 (1974-03-01), Jones
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