Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Reexamination Certificate
2008-07-08
2008-07-08
Swarthout, Brent A. (Department: 2612)
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
C123S1980DA, C123S351000, C123S041120, C123S041150, C340S438000
Reexamination Certificate
active
11651787
ABSTRACT:
The invention relates to an engine cooling system monitoring system. There is a need for a cooling system monitoring system for an engine system wherein the coolant is maintained at a precise temperature. Thus, a cooling system monitoring system is provided for an engine system having internal combustion engine, a fan driven by a variable speed fan drive, and a radiator for cooling coolant circulating through the engine. The monitoring system includes a fan speed sensor generating a fan speed signal, a control unit and a display device controlled by the control unit. The control unit generates a cooling system status signal as a function of the fan speed signal and a maximum fan speed value. The display device has visible position range associated with a normal engine operating temperature, and has an indicator movable within said position range in response to the cooling system status signal to indicate a status of the engine cooling system.
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patent: 2006/0062678 (2006-03-01), Furuta et al.
patent: 2006/0254540 (2006-11-01), Tuttle
Deere & Company
Swarthout Brent A.
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