Ryan R Harken from 3808 W Wood Trail Ct, Lake Of The Woods, IL 61525, age 44, Phone: 3098403062

Hydrostatic Drive System With Variable Charge Pump
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US Patent:

20080238187, Oct 2, 2008
Filed:

Mar 30, 2007
Appl. No.:

11/729916
Inventors:

Stephen Carl Garnett - Princeville IL, US
Michael Jon Grichnik - Peoria IL, US
Randall Alan Harlow - Brimfield IL, US
David Jason McIntyre - Chillicothe IL, US
Eric David Stemler - Peoria IL, US
Timothy Lynn Hand - Metamora IL, US
Adam Hendzel - Naperville IL, US
Ryan Raymond Harken - Lowpoint IL, US
Nathanael Garnet McRostie - Oswego IL, US
International Classification:

B60T 8/52
US Classification:

303112, 180199
Abstract:

A hydraulic system is provided having a reservoir configured to hold a supply of fluid. The hydraulic system also has a variable displacement pump configured to supply charge fluid and pilot control fluid to the hydraulic system. In addition, the hydraulic system has a closed-loop portion configured to receive charge fluid from the variable displacement pump and drive a mechanism. The hydraulic system further has a pilot fluid supply portion configured to direct pilot control fluid from the variable displacement pump to closed-loop portion.

Hydromechanical Power Management Of Fixed Displacement Boost Pumps
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US Patent:

20140325971, Nov 6, 2014
Filed:

May 1, 2013
Appl. No.:

13/874955
Inventors:

- Peoria IL, US
Ryan Harken - Dunlap IL, US
Robert Jackson - Edwards IL, US
David Guetschow - East Peoria IL, US
Jeffrey Jones - Washington IL, US
Assignee:

Caterpillar Inc. - Peoria IL
International Classification:

F16H 61/4139
US Classification:

60327, 60464
Abstract:

A hydraulic apparatus and a method of controlling the hydraulic apparatus are disclosed. The hydraulic apparatus includes a first pump having a first fixed displacement, a second pump having a second fixed displacement, and a diverter. The diverter includes a first diverter inlet port fluidly coupled to a discharge of the second pump, a first diverter outlet port fluidly coupled to a discharge of the first pump, and a second diverter outlet port fluidly coupled to a low pressure system, the low pressure system having a fluid pressure lower than a fluid pressure of the discharge of the first pump. The diverter is operable to selectively vary fluid communication between the first diverter inlet port and either the first diverter outlet port or the second diverter outlet port based on a reference pressure.

Ryan R Harken