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公开(公告)号：US10259493B2
公开(公告)日：2019-04-16
申请号：US15373558
申请日：2016-12-09
Applicant: Caterpillar Inc.
Inventor： Edward William Mate , David Mork , Steven Edward Johnson
Abstract: An emergency steering pump system for a primary pump providing a standby pressure via a primary output line includes a load sense line that is configured to branch-off from the primary output line. The load sense line has a first orifice disposed therein. A secondary pump is included for providing a margin pressure via a secondary output line that is coupled to the primary output line at a point downstream of the load sense line. A communication line is coupled to the primary output line at a point upstream of the load sense line. The communication line has a pressure control mechanism disposed therein. An output of the pressure control mechanism is coupled with an unloader valve of the secondary pump such that the pressure control mechanism is configured to bring about the margin pressure from the secondary pump.
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Patent Agency Ranking
公开(公告)号：US20220348180A1
公开(公告)日：2022-11-03
申请号：US17242529
申请日：2021-04-28
Applicant: Caterpillar Inc.
Inventor： Steven Edward Johnson , Adam J. Adeeb
Abstract: A retarding control assembly for a brake valve may include a bleed line configured for arrangement between a spring chamber of a brake command assembly and a tank line. The bleed line may include a check valve configured to allow fluid flow from the spring chamber to the tank and a check valve bypass configured to allow fluid flow from the tank line to the spring chamber passed the check valve and defining a restricted pathway.
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公开(公告)号：US20160245149A1
公开(公告)日：2016-08-25
申请号：US15143208
申请日：2016-04-29
Applicant: Caterpillar Inc.
Inventor： Steven Edward Johnson
CPC classification number: F01P7/044 , F01P5/04 , F01P2005/025 , F15B11/042 , F15B11/0423 , F16H61/452
Abstract: A hydraulic driven fan system includes at least one first fan motor and a second fan motor connected in series with each other. The system also includes a fixed displacement pump configured to supply a pressurized flow of a hydraulic fluid to the at least one first and second fan motors. The system includes a proportional flow control valve in fluid communication with the at least one first fan motor and configured to allow a regulated amount of the pressurized flow of the hydraulic fluid there through to the corresponding at least one first fan motor. The system includes a pressure compensator disposed parallel to the proportional flow control valve and configured to maintain a pressure difference across the proportional flow control valve. The system further includes a proportional pressure relief valve disposed parallel to the second fan motor and configured to control a pressure difference across the second fan motor.
Abstract translation: 液压驱动风扇系统包括彼此串联连接的至少一个第一风扇马达和第二风扇马达。 该系统还包括固定排量泵，其构造成向至少一个第一和第二风扇马达提供液压流体的加压流。 该系统包括与至少一个第一风扇电动机流体连通的比例流量控制阀，并且被配置为允许其中的液压流体的加压流量的调节量通过相应的至少一个第一风扇马达。 该系统包括平行于比例流量控制阀设置的压力补偿器，并被配置为保持横跨比例流量控制阀的压力差。 该系统还包括与第二风扇电动机平行设置的并配置成控制跨越第二风扇电动机的压力差的比例的压力释放阀。
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公开(公告)号：US11738732B2
公开(公告)日：2023-08-29
申请号：US17242529
申请日：2021-04-28
Applicant: Caterpillar Inc.
Inventor： Steven Edward Johnson , Adam J Adeeb
CPC classification number: B60T15/36 , B60T13/148 , B60T17/04 , B60T17/222 , F16K17/04
Abstract: A retarding control assembly for a brake valve may include a bleed line configured for arrangement between a spring chamber of a brake command assembly and a tank line. The bleed line may include a check valve configured to allow fluid flow from the spring chamber to the tank and a check valve bypass configured to allow fluid flow from the tank line to the spring chamber passed the check valve and defining a restricted pathway.
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公开(公告)号：US20180162441A1
公开(公告)日：2018-06-14
申请号：US15373558
申请日：2016-12-09
Applicant: Caterpillar Inc.
Inventor： Edward William Mate , David Mork , Steven Edward Johnson
Abstract: An emergency steering pump system for a primary pump providing a standby pressure via a primary output line includes a load sense line that is configured to branch-off from the primary output line. The load sense line has a first orifice disposed therein. A secondary pump is included for providing a margin pressure via a secondary output line that is coupled to the primary output line at a point downstream of the load sense line. A communication line is coupled to the primary output line at a point upstream of the load sense line. The communication line has a pressure control mechanism disposed therein. An output of the pressure control mechanism is coupled with an unloader valve of the secondary pump such that the pressure control mechanism is configured to bring about the margin pressure from the secondary pump.
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公开(公告)号：US10006334B2
公开(公告)日：2018-06-26
申请号：US15143208
申请日：2016-04-29
Applicant: Caterpillar Inc.
Inventor： Steven Edward Johnson
IPC: F15B11/042 , F01P7/04 , F01P5/04 , F16H61/452 , F01P5/02
CPC classification number: F01P7/044 , F01P5/04 , F01P2005/025 , F15B11/042 , F15B11/0423 , F16H61/452
Abstract: A hydraulic driven fan system includes at least one first fan motor and a second fan motor connected in series with each other. The system also includes a fixed displacement pump configured to supply a pressurized flow of a hydraulic fluid to the at least one first and second fan motors. The system includes a proportional flow control valve in fluid communication with the at least one first fan motor and configured to allow a regulated amount of the pressurized flow of the hydraulic fluid there through to the corresponding at least one first fan motor. The system includes a pressure compensator disposed parallel to the proportional flow control valve and configured to maintain a pressure difference across the proportional flow control valve. The system further includes a proportional pressure relief valve disposed parallel to the second fan motor and configured to control a pressure difference across the second fan motor.
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