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:
Aug. 17, 1982
Filed:
Jun. 23, 1980
Robert H Casterton, Waterloo, IA (US);
Larry J Phippen, Waterloo, IA (US);
Darrell L Wright, Waterloo, IA (US);
Deere & Company, Moline, IL (US);
Abstract
An air distribution system for a vehicle cab. The system uses two blowers: a first constant-volume blower for drawing fresh outside air into the cab and a second variable-speed blower for recirculating the inside air. An air filter is positioned upstream of both blowers for filtering out dust and other contaminants. As the fresh outside air passes through the first blower, it is mixed in a mixing zone with inside air which passes thorugh the second blower. This intermixed air is then passed through a temperature controller which includes a heating unit and an air conditioning unit. The temperature controller treats the air stream before it is routed through a series of ductwork to various parts of the operator's compartment of the cab. This two-blower air distribution system is a vast improvement over conventional air distribution systems in that it always provides for a positive air pressurization within the cab thereby preventing the influx of dust.