Title: Controlled crop drying attachment for combine

Abstract: A heat exchanger is mounted to the combine and receives waste heat from the combine engine. A blower is mounted to the combine and sucks ambient air through the heat exchanger to heat the air and blows the heated air into a closed end duct that has a portion mounted in the combine crop hopper. The portion of the closed end duct mounted in the crop hopper has a plurality of perforations therein so that the heated air can dry the combined crops. An apparatus is provided for controlling the temperature of the air blown into the combined crops including a damper for supplying a desired mixture of ambient air and heated air to the closed end duct. A transducer mounted in the closed end duct and a transducer responsive damper actuating apparatus moves the damper in response to the transducer response to the temperature of the air passing the transducer. The transducer responsive damper actuating apparatus is shown as a mechanical, pneumatic and electrical apparatus.

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Inventors: Black, Glen N.

Application Number: 564429
Filing Date: 1975-04-02
Publication_date: 1977-05-10
Assignee:
Primary Class(es): 34/571 34/86, 56/12.2
Other Classes:
US Patent Ref:

1658775	Feb, 1928	Campbell	34/86.
2200379	May, 1940	Williams	34/86.
2343345	Mar, 1944	Touton	34/233.
2777212	Jan, 1957	McOmber	34/86.
3096165	Jul, 1963	Lane	34/86.
3388549	Jun, 1968	Spencer et al.	60/597.

Other Refs: 784,861936,577

Oct, 1957	UK
Sep, 1963	UK

Primary Examiner: Camby, John J.
Assistant Examiner: Schwartz, Larry I.
Attorney: Fishburn, Gold & Litman