公开(公告)号：US20230064337A1

公开(公告)日：2023-03-02

申请号：US17458033

申请日：2021-08-26

Applicant: Caterpillar Inc.

Inventor： Ethan M. Tevis ,  Michael C. Gentle ,  Travis N. Richards ,  Michael L. Repscher ,  Ernest E. Stoops

IPC: E02F9/24 ,  E02F9/20 ,  E02F9/22 ,  E02F9/26

Abstract: A technique is directed to methods and systems of an implement lock-out on lever-controlled machines. A lock-out system can monitor the position of an implement and lock-out the implement control(s) when the implement is within a threshold distance to parts of the machine. The lock-out system can generate an implement lock-out to slow, stop, or reduce the force of a hydraulic valve(s) controlling the implement. The lock-out system can use inputs such as electronic fence blade position system data, articulation angles, wheel lean angles, steering angles, ripper positions, mode selection or similar data to determine to generate the implement lock-out. The lock-out system can generate the implement lock-out by a flow supply shutoff to the implement while maintaining pressure to the steering valve. The lock-out system can send visual or audible notifications to alert the operator of the implement's proximity to the machine or of an implement lock-out.

公开(公告)号：US11619026B2

公开(公告)日：2023-04-04

申请号：US16591034

申请日：2019-10-02

Applicant: Caterpillar Inc.

Inventor： Richard Lane Fulcher ,  Timothy A. Evans ,  Travis N. Richards ,  Yongtao Li

IPC: E02F9/22 ,  E02F3/76

Abstract: A motor grader having ride control for dampening machine bounce using a DCM assembly rotatably coupled to and suspended from a frame of the motor grader is disclosed. Each lift cylinder for the DCM may have an associated ride control circuit with an accumulator, a ride control conduit fluidly connected to a carry end of the lift cylinder and having a flow restriction element, and a ride control accumulator valve fluidly connected to the accumulator and the ride control conduit and operable to either block or allow fluid communication between the carry end and the accumulator through the flow restriction element. Each rid control circuit may also include a head end valve fluidly connected to between the head end of the lift cylinder and a low pressure fluid reservoir and operable to block or allow fluid communication between the head end and the low pressure fluid reservoir.

公开(公告)号：US20250034836A1

公开(公告)日：2025-01-30

申请号：US18357538

申请日：2023-07-24

Applicant: Caterpillar Inc.

Inventor： Travis N. Richards ,  Brad R. Van De Veer ,  Jeffrey L. Kuehn ,  Michael S. Hill

IPC: E02F3/84

Abstract: A mobile construction equipment for operation on a surface includes: a work tool that is movable between at least one float position, in which the work tool floats with respect to the surface, and at least one non-float position, in which the work tool does not float with respect to the surface; a machine speed sensor for providing a machine speed of the mobile construction equipment; and a controller having a work tool float mode, in which the work tool is movable to the at least one float position, the controller, in a work tool float inhibit mode, in which the work tool is not movable to the at least one float position, receiving the machine speed, and, if the machine speed exceeds a float activation limit: disabling the work tool float mode so as to prevent the work tool from moving to the at least one float position.

公开(公告)号：US20210102358A1

公开(公告)日：2021-04-08

申请号：US16591034

申请日：2019-10-02

Applicant: Caterpillar Inc.

Inventor： Richard Lane Fulcher ,  Timothy A. Evans ,  Travis N. Richards ,  Yongtao Li

IPC: E02F9/22 ,  E02F3/76

Abstract: A motor grader having ride control for dampening machine bounce using a DCM assembly rotatably coupled to and suspended from a frame of the motor grader is disclosed. Each lift cylinder for the DCM may have an associated ride control circuit with an accumulator, a ride control conduit fluidly connected to a carry end of the lift cylinder and having a flow restriction element, and a ride control accumulator valve fluidly connected to the accumulator and the ride control conduit and operable to either block or allow fluid communication between the carry end and the accumulator through the flow restriction element. Each rid control circuit may also include a head end valve fluidly connected to between the head end of the lift cylinder and a low pressure fluid reservoir and operable to block or allow fluid communication between the head end and the low pressure fluid reservoir.

公开(公告)号：US10920396B1

公开(公告)日：2021-02-16

申请号：US16527586

申请日：2019-07-31

Applicant: Caterpillar Inc.

Inventor： Travis N. Richards ,  Ernest E. Stoops ,  Michael L. Repscher ,  Stive Ramalho ,  Wesley T. Payne

IPC: E02F9/22 ,  E02F3/84

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.