Kishore Balasubramanian

US Patent:

20110088785, Apr 21, 2011

Filed:

Oct 21, 2009

Appl. No.:

12/582768

Inventors:

Kishore Balasubramanian - Bloomington MN, US

Assignee:

Eaton Corporation - Cleveland OH

International Classification:

F16K 17/00

US Classification:

137 1, 137455

Abstract:

A method for controlling a safety feature for a hydraulic machine is provided. The method includes detecting when at least control valve for a controller of an implement for the hydraulic machine is stuck in a position. An exhaust valve for the hydraulic control system is then moved to a closed position to prevent movement of the implement of the hydraulic machine.

US Patent:

20110126608, Jun 2, 2011

Filed:

Nov 30, 2009

Appl. No.:

12/626970

Inventors:

Wade L. Gehlhoff - Shakopee MN, US
Chris W. Schottler - Chanhassen MN, US
Kishore Balasubramanian - Bloomington MN, US
Christian Fagerlund - Bredared, SE

Assignee:

Eaton Corporation - Cleveland OH

International Classification:

G01L 27/00

US Classification:

73 157

Abstract:

A method for resetting a calibration of a sensor operating out-of-range in a hydraulic actuation system is provided. The hydraulic actuation system includes a pump, a reservoir, a plurality of work-ports, a plurality of sensors, and a valve system, and a controller for regulating the hydraulic actuation system based on fluid flow demand and sensed pressures. The method includes detecting the sensor operating out-of-range, opening all work-ports to the reservoir, resetting all sensors to reservoir pressure, supplying all sensors with fluid at maximum pump pressure, and sensing the maximum pump pressure at each sensor. Additionally, the method includes determining an average pressure value across all sensors, assigning the determined average pressure value to the sensor that is operating out-of-range, and resetting the calibration of the sensor that is operating out-of-range based on the reservoir pressure and the average pressure values.