Cnh America LLC

Case Corporation

Robert D Doescher

Alan G Leupold

Hugh Richard Voit

Marvin D Pepper

Eric Michael Jacobsthal

Carl J Hagele

Dale W Panoushek

Orlin Wayne Johnson

Calvin J Kraning

Curtis A Halgrimson

William J McCasky

Quentin L Guhr

Peter H Kennedy

Combine harvester

A variable air circulation system for the cab enclosure of an off-highway vehicle is disclosed and described. The system provides for adjustment of the ratio between fresh air circulation and recirculation of cab air. Fresh air is introduced into the cab through a fresh air inlet having a fresh air filter therein. The air inlet leads to a circulation conduit. When a cab door is opened, a valve to the conduit is opened. When the door is closed, the air pulse created in the cab is effective, through the valve, to dislodge dust and dirt from the filter.

Filter purge control for HVAC variable air circulation system

A fixed air circulation system for the cab enclosure of an off-highway vehicle is disclosed. Fresh air is introduced into the cab through a fresh air inlet having a fresh air filter therein. The air inlet leads, through a manifold or fresh air duct, to the inside of the operator's compartment. When a cab door is opened, a bypass valve to the conduit is opened. When the door is closed, the air pulse created in the cab is effective, through the bypass valve or normal openings with the blower off, to dislodge dust and dirt from the filter.

Filter purge control for HVAC fixed air circulation system

A method and apparatus for providing a cab pressure drop warning to an off-road machine operator and instructions for increasing the cab pressure and for providing incentive to correct the pressure drop, the method including comparing ambient and cab pressures and threshold pressure (i.e., the ambient plus a differential value), causing a vehicle operation disruption for at least a short period during which the operator may elect to remedy the cab pressure drop.

Cab environment warning and control method and apparatus

A combine including an improved HVAC control system. The frame of the combine supports an operator cab, a harvesting head and the other operational systems of the combine. The control system includes an operator control and a heat exchanger located in the cab. The control system also includes at least one sensor disposed to sense at least one of an ambient air temperature, a cab air temperature and solar loading, and to produce at least one sensed signal representative thereof. The operator control is configured to produce a set-point signal representative of a desired cab air temperature. An interface circuit is electromagnetically coupled to the valve assembly, the operator control, and the at least one sensor. A cooling coil may also be located in the cab, wherein the interface circuit is electromagnetically coupled to the associated coolant compressor. The interface circuit produces a temperature differential based upon a comparison of the set-point signal to the at least one sensed signal and applies the electrical control signals to the valve, compressor and blower based upon the temperature differential to achieve the desired cab air temperature and minimize cab air temperature oscillations.

Agricultural vehicle cab automatic temperature control system

A window is provided in the cab of a combine, in visual alignment with a window in the harvest bin, and another window in a harvest bin extension if provided, for observation of the interior of the harvest bin by the combine operator. The window in the cab of the combine is pivotally mounted about a horizontal axis near the bottom of the window, such that it may be opened to clean the outside surfaces of the cab, the harvest bin, and the harvest bin extension windows.

Openable combine cab window assembly

Growing community of inventors

Geneseo, IL, United States of America

Robert D Doescher