Ventilation – Storage area for perishables – Harvested crop ventilation
Patent
1991-10-25
1994-09-06
Joyce, Harold
Ventilation
Storage area for perishables
Harvested crop ventilation
1375278, 454259, 454359, F24F 702
Patent
active
053443632
ABSTRACT:
A roof vent for a grain bin communicates air flow from within the grain bin to ambient air, especially when air is forced through the bin for the purpose of drying the grain therein. The vent includes a housing with a flap closure member in the shape of an airfoil pivotally mounted on a horizontal axis above the center of gravity of the flap member. When sufficient air pressure is developed within the bin, the force of gravity on the flap member is overcome and the flap member pivots to an open position. As air flows over and under the flap member, the airfoil shape of the flap member creates a decreased pressure over the member and a lift force causes the flap member to position itself in an open position with minimal obstruction to air flow through the vent housing providing many operational advantages. Other novel features of the roof vent include a U-shaped rod which stiffens the vent housing economically and without vent passageway obstruction; a novel plastic lip against which the novel flap closure rests and cooperates to drain away condensation, and along with inexpensive plastic pivot brackets on the flap closure alleviate freeze-up of the flap in cold weather and promote smooth, quiet operation of the vent. One embodiment of the vent is adaptable for use where air is drawn into a grain bin through the vent as well as expelled through the vent.
REFERENCES:
patent: 718657 (1903-01-01), Renton
patent: 1448307 (1923-03-01), Loop
patent: 2332552 (1943-10-01), Belanger
patent: 2741972 (1956-04-01), Pryne
patent: 2754748 (1956-07-01), Daggett
patent: 2784661 (1957-03-01), Jenn
patent: 2790377 (1957-04-01), Pryne
patent: 4480534 (1984-11-01), Sloan
patent: 4494564 (1985-01-01), Lukacz
patent: 4498373 (1985-02-01), Dittmer et al.
patent: 4872398 (1989-10-01), Shen
patent: 5046408 (1991-09-01), Eugenio
Grain Systems Incorporated
Joyce Harold
LandOfFree
Roof vent assembly for grain storage bin does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Roof vent assembly for grain storage bin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Roof vent assembly for grain storage bin will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1326504