Ernest A Stoops

US Patent:

20210032840, Feb 4, 2021

Filed:

Jul 31, 2019

Appl. No.:

16/527586

Inventors:

- Deerfield IL, US
Ernest E. STOOPS - Decatur IL, US
Michael L. REPSCHER - Taylorville IL, US
Stive RAMALHO - Isle d'Abeau, FR
Wesley T. PAYNE - Plainfield IL, US

Assignee:

Caterpillar Inc. - Deerfield IL

International Classification:

E02F 3/84
E02F 9/22

Abstract:

A hydraulic system for a motor grader is disclosed. The hydraulic system may include a first hydraulic subsystem and a second hydraulic subsystem. A pump may be configured to provide pressurized fluid to the first and second hydraulic subsystems. The hydraulic system may further include a control valve located upstream of the first and second hydraulic subsystems. The control valve may be configured to vary a standby pressure of pressurized fluid for use by the first and second hydraulic subsystems.

US Patent:

20200392702, Dec 17, 2020

Filed:

Jun 11, 2019

Appl. No.:

16/436959

Inventors:

- Deerfield IL, US
Ernest Everett Stoops - Decatur IL, US
Michael Lemoyne Repscher - Taylorville IL, US
Matthew David Roley - Mortonil IL, US
Ramalho Stive - Isle d'Abeau, FR
Michael Robert Kunde - Decatur IL, US
Dwanz Mwalimu Mwasi - Seco Green Valley AZ, US
Charles Eric Nail - Macon IL, US
Bart Jerome Bradford - Mt. Zion IL, US

Assignee:

Caterpillar Inc. - Deerfield IL

International Classification:

E02F 9/22
F15B 13/06
F15B 13/02

Abstract:

A hydraulic circuit for a pair of cylinders of an articulation system includes a pump, a reservoir, a directional control valve (DCV), a pair of actuator valves (AVs) and an articulation charge circuit (ACC). The DCV is fluidly coupled to the pump, the reservoir and the pair of cylinders via a supply line, a fluid return line and a pair of cylinder supply lines (CSLs) respectively. Each CSL has a load check valve (LCV) therein. The AVs are fluidly coupled with the DCV and the pump via a pilot supply line (PSL) for actuating movement of the DCV. The ACC, associated with the PSL and each cylinder supply line downstream of the associated LCV, charges a corresponding CSL with fluid from the PSL for increasing a pressure in the corresponding CSL when the pressure in the corresponding CSL falls below the pressure of fluid associated with the PSL.

US Patent:

20180354485, Dec 13, 2018

Filed:

May 22, 2018

Appl. No.:

15/985920

Inventors:

- Geneva, CH
Steven Edward Johnson - Washington IL, US
Anthony Joseph Weltzer - Cary IL, US
Ernest Everett Stoops - Decatur IL, US

Assignee:

Caterpillar SARL - Geneva

International Classification:

B60T 17/02
B60T 17/04
B60T 8/173
B60T 15/50
B60T 17/22

Abstract:

A system for delivering fluid in a machine is provided. The system includes a pump, a first valve disposed downstream of the pump, a check valve disposed downstream of the first valve, at least one accumulator disposed downstream of the check valve, and an auxiliary system disposed upstream of the check valve. The system further includes a control unit configured to receive a signal indicative of a fluid demand from the auxiliary system. The control unit is also configured to selectively control the first valve in a first position to limit flow of the fluid from the pump to the auxiliary system, and in a second position to allow flow of the fluid from the pump to the auxiliary system based, at least in part, on the received signal. The check valve limits flow of a fluid from the at least one accumulator to the auxiliary system.