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Patent Agency Ranking
公开(公告)号：US09388829B2
公开(公告)日：2016-07-12
申请号：US13718882
申请日：2012-12-18
Applicant: Caterpillar Inc.
Inventor： Jiao Zhang , Lawrence J. Tognetti , Pengfei Ma , Dayao Chen , John Ferraz, Jr. , Tetsuya Yoshino
CPC classification number: F15B1/027 , F15B1/024 , F15B21/14 , F15B2211/625 , F15B2211/6306 , F15B2211/6313 , F15B2211/7058 , F15B2211/88
Abstract: A hydraulic control system is disclosed for use in a machine. The hydraulic control system may have a work tool, a motor configured to swing the work tool, a tank, a pump configured to draw fluid from the tank and pressurize the fluid, and a control valve operable to control fluid flow from the pump to the motor and from the motor to the tank via first and second chamber passages to affect motion of the motor. The hydraulic control system may also have an accumulator, and an accumulator circuit configured to selectively direct fluid discharged from the motor to the accumulator for storage and to direct stored fluid from the accumulator to the motor to assist the motor. The hydraulic control system may further have a selector valve configured to selectively connect a higher pressure one of the first and second chamber passages with the accumulator, and a single pressure relief valve disposed within the accumulator circuit and configured to relief pressure from opposing sides of the motor.
Abstract translation: 公开了一种在机器中使用的液压控制系统。 液压控制系统可以具有工作工具，构造成摆动工作工具的马达，一个构造成从罐中抽出流体并对流体加压的泵;以及控制阀，该控制阀可操作以控制流体从泵流向 电动机，并通过第一和第二室通道从电动机到燃料箱，以影响电动机的运动。 液压控制系统还可以具有蓄能器和蓄电池电路，其被配置为选择性地将从电动机排出的流体引导到蓄电池以进行存储，并将存储的流体从蓄能器引导到电动机以辅助电动机。 液压控制系统还可以具有一个选择阀，其配置成选择性地将第一和第二室通道中的较高压力的一个与蓄能器连接，以及一个设置在蓄电池回路内的单个泄压阀， 发动机。
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公开(公告)号：US12286982B1
公开(公告)日：2025-04-29
申请号：US18385379
申请日：2023-10-30
Applicant: Caterpillar Inc.
Inventor： John Ferraz, Jr. , William O'Neill , Michael Thomas Jackson
Abstract: This disclosure describes a modular hydraulic manifold for controlling an operation of a hydraulic actuator for an earthmoving machine. The manifold has a spool chamber and a load sensing passageway. The body also has a spool positioned axially within the spool chamber. The spool is spring-biased by an end cap. The module also has a pair of spool actuators that are located at a second end of the body and operable to axially displace the spool within the spool chamber. The pair of spool actuators are positioned in parallel and disposed adjacent to one another. The manifold also has an inlet chamber disposed parallel to the spool chamber and in selective fluid communication with the spool chamber via a spool supply passageway. The body includes openings on opposite sides that open directly to inlet and spool chambers of adjacent bodies to reduce passageway constriction within the hydraulic system.
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公开(公告)号：US10753068B1
公开(公告)日：2020-08-25
申请号：US16294049
申请日：2019-03-06
Applicant: Caterpillar Inc.
Inventor： John Ferraz, Jr. , Michael Thomas Jackson , Kenneth Alan Dust
Abstract: An electro-hydraulic arrangement for controlling operation of a pair of tilt actuators of an earthmoving machine includes a housing, and a directional control valve (DCV) and a regeneration valve (RV) disposed within the housing. The DCV and the RV are coupled in selective fluid communication with one another and with rod end and head end chambers of the actuators via ports defined on the housing. When the DCV is in a first or second operative position, the RV may be positioned in a regenerative position to allow the rod end chambers of respective ones of the first and second actuators to communicate fluid to the head end chamber of the second actuator. Optionally, the regeneration valve may be positioned in a drain position to allow the rod end chambers of respective ones of the first and second actuators to communicate fluid with a drain port of the housing.
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公开(公告)号：US11053958B2
公开(公告)日：2021-07-06
申请号：US16357459
申请日：2019-03-19
Applicant: Caterpillar Inc.
Inventor： John Ferraz, Jr. , Michael Thomas Jackson , William Norbert O'Neill
IPC: F15B13/02 , F15B21/14 , F15B11/024 , F15B13/04 , E02F9/22
Abstract: A regeneration valve includes a housing defining a first port, a second port, a third port, and a chamber fluidly communicating with the first, second, and third ports. The chamber has a valve element movable between a first position, in which the second port fluidly communicates with the first port, and a second position, in which the second port fluidly communicates with the third port. A resilient member biases the valve element towards the first position. In operation, a flow restrictor element moves between the first port and the second port for restricting fluid flow from the second port to the first port. At a predetermined flow rate between the second port and the first port, if a supply pressure of fluid at the actuation chamber exceeds the bias of the resilient member, the valve element moves to the second position for fluidly communicating the second and third ports.
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公开(公告)号：US10858806B2
公开(公告)日：2020-12-08
申请号：US16299554
申请日：2019-03-12
Applicant: Caterpillar Inc.
Inventor： John Ferraz, Jr. , Michael Thomas Jackson , William Norbert O'Neill
IPC: E02F9/22
Abstract: A control module for controlling an operation of a hydraulic actuator that is associated with an earthmoving machine includes a body. The body has a spool chamber and a load sensing passageway associated with the spool chamber. The body also has a spool positioned axially, and at least partially, within the spool chamber. The spool is spring-biased by an end cap located at a first end of the body. The body also has a pair of electrohydraulic spool actuators that are located at a second end of the body and operable to axially displace the spool within the spool chamber. The pair of spool actuators are positioned in parallel and disposed adjacent to one another. The body also has an inlet chamber disposed parallel to the spool chamber and in selective fluid communication with the spool chamber via a spool supply passageway.
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