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公开(公告)号：US10378535B2
公开(公告)日：2019-08-13
申请号：US15341033
申请日：2016-11-02
Applicant: Caterpillar Inc.
Inventor： Sana Mahmood , Dennis H Gibson
Abstract: A damping assembly for a valve is provided. The valve is configured to move between an open position and a close position. The valve includes a valve element and a valve stem disposed within a head. The damping assembly includes a damping chamber defined within the head. The damping assembly defines a sidewall. The damping assembly also includes a collar configured to receive the valve stem. The collar includes a collar stem. The collar also includes a collar head having an outer diameter. The collar head includes a side surface. The damping assembly includes a liquid passageway. The liquid passageway is being defined by a radial clearance between the side surface of the collar head and the sidewall of the damping chamber. The liquid passageway is configured to control a flow of a liquid as the valve moves between the open position and the closed position.
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公开(公告)号：US11859583B2
公开(公告)日：2024-01-02
申请号：US17327851
申请日：2021-05-24
Applicant: Caterpillar Inc.
Inventor： Sana Mahmood , Robert M. Campion , Lifeng Wang
CPC classification number: F02M51/061 , F02M47/027 , F02M61/04 , F02M63/0064 , F16K31/1245 , F02M55/025 , F02M59/00 , F02M2200/44 , F02M2200/46 , F16K31/0675
Abstract: A fuel injector is disclosed. The fuel injector may have an injector body having a fuel inlet and at least one orifice. The fuel injector may also have a first check valve member. The first check valve member may be selectively movable to fluidly block a first flow of fuel from the fuel inlet to the at least one orifice. The fuel injector may have a second check valve member. The second check valve member may be selectively movable to fluidly block a second flow of fuel from the fuel inlet to the at least one orifice. The fuel injector may also have a control valve assembly. The control valve assembly may be configured to selectively operate either the first check valve or both the first check valve and the second check valve to fluidly connect the fuel inlet and the at least one orifice.
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公开(公告)号：US20190383254A1
公开(公告)日：2019-12-19
申请号：US16007418
申请日：2018-06-13
Applicant: Caterpillar Inc.
Inventor： Dana R. Coldren , Sana Mahmood , Stephen R. Lewis
Abstract: A fuel system for an internal combustion engine includes a common rail and a plurality of fuel injectors connected to the common rail and each including an outlet check, an injection control valve, and an injection rate controller. The injection rate controller varies a flow area to a nozzle of the fuel injector such that a pressure drop through the fuel injector is varied to provide injection rate shaping.
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公开(公告)号：US10060421B2
公开(公告)日：2018-08-28
申请号：US14753585
申请日：2015-06-29
Applicant: Caterpillar Inc.
Inventor： Cory A. Brown , Adrienne M. Brasche , Sunil J. Bean , Shivangini S. Hazari , Sana Mahmood , Nikhil M. Arya , Joshua W. Steffen , Daniel R. Baldwin , Dana R. Coldren , Robert M. Campion , Alan R. Stockner
CPC classification number: F04B23/02 , F04B9/1176 , F04B23/023 , F04B23/06 , F04B37/08 , F04B49/065 , F04B2015/081 , F17C2227/0142
Abstract: A cryogenic fluid pump includes a plurality of pumping elements, each of the plurality of pumping elements having an actuator portion that is associated with and configured to selectively activate one end of a pushrod in response to a command by an electronic controller, an activation portion associated with an opposite end of the pushrod, and a pumping portion associated with the activation portion. For each of the plurality of pumping elements, the pumping portion is activated for pumping a fluid by the activation portion, which activation portion is activated by the actuator portion. The electronic controller is configured to selectively activate each of the plurality of pumping elements such that a flow of fluid from the cryogenic fluid pump results from continuous activations of the plurality of pumping elements at selected dwell times between activations of successive pumping elements.
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公开(公告)号：US20160201659A1
公开(公告)日：2016-07-14
申请号：US14597019
申请日：2015-01-14
Applicant: Caterpillar Inc.
Inventor： Bryan E. Nelson , Daniel R. Baldwin , Alan R. Stockner , Robert M. Campion , Cory A. Brown , Joshua W. Steffen , Dana R. Coldren , Sana Mahmood
CPC classification number: F04B27/1054 , F04B27/1063 , F04B37/08 , F16C19/06 , F16C19/30 , F16C19/547 , F16C23/086 , F16C2360/00
Abstract: A bearing arrangement for a wobble plate piston pump includes first, second, third, and fourth bearing assemblies. The first and second bearing assemblies support the drive shaft portion for rotation within the housing about the central longitudinal axis, while the third and fourth bearing assemblies support the load plate for rotation relative to the offset shaft portion of the shaft. The second bearing assembly is distally disposed from the first, the third disposed distally to second, and the fourth disposed distally to third. The fourth bearing assembly is the most distally disposed bearing assembly along the shaft.
Abstract translation: 摆动板活塞泵的轴承装置包括第一，第二，第三和第四轴承组件。 第一和第二轴承组件支撑驱动轴部分，用于围绕中心纵向轴线在壳体内旋转，同时第三和第四轴承组件支撑负载板以相对于轴的偏心轴部分旋转。 第二轴承组件从第一轴向组件向远侧设置，第三轴向组件向远侧配置到第二轴承组件，而第四轴向组件向远侧配置到第二轴承组件。 第四轴承组件是沿着轴的最远端布置的轴承组件。
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Patent Agency Ranking
公开(公告)号：US20220186697A1
公开(公告)日：2022-06-16
申请号：US17121352
申请日：2020-12-14
Applicant: Caterpillar Inc.
Inventor： Sana Mahmood , Glenn Brian Cox , Dana Ray Coldren
Abstract: A fuel injector nozzle assembly includes a two-piece outlet check having a timing control piece and a rate control piece. A nozzle passage is formed between a nozzle body and a two-piece outlet check, and a sac cavity is formed by the rate control piece and the nozzle body and fluidly connects a through-hole in the rate control piece to nozzle outlets. A starting-flow clearance is formed by the rate control piece and the timing control piece, and is opened by moving the timing control piece relative to the rate control piece. Moving the rate control piece relative to the nozzle body opens a main-flow seat. The nozzle assembly provides a slow starting injection rate shape in a common rail or similar fuel system and improved controllability over minimum delivery quantities.
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公开(公告)号：US20220154673A1
公开(公告)日：2022-05-19
申请号：US16950026
申请日：2020-11-17
Applicant: Caterpillar Inc.
Inventor： Cory Andrew Brown , Sana Mahmood , Dana Ray Coldren , Glenn Brian Cox , Matthew Robert Vanderveen
Abstract: A fuel system includes a fuel injector having a split check assembly with a control piece, an outlet piece, and a check sleeve. A trapped volume is formed between the control piece and the outlet piece within the check sleeve, to hydraulically couple the control piece to the outlet piece. A starting rate shape clearance fluidly connects the trapped volume to a fuel cavity and is formed between the check sleeve and one of the control piece or outlet piece received therein, and modulates a starting rate shape of fuel injection from the fuel injector. Related methodology is disclosed.
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公开(公告)号：US10711754B2
公开(公告)日：2020-07-14
申请号：US15833156
申请日：2017-12-06
Applicant: Caterpillar Inc.
Inventor： Bryan Edward Nelson , Sana Mahmood , Stephen R Lewis
Abstract: A valve assembly for a pump includes an electrical actuator having a stator and an armature, where the armature includes a top armature surface facing the stator and having an inwardly stepped-up profile that forms a raised surface at a radially inward location, and a lower, gap-forming surface at a radially outward location that forms a gap between the armature and the stator when the electrical actuator is activated to facilitate displacing fluid and avoiding production of high velocity, potentially damaging fluid flows.
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公开(公告)号：US20190170267A1
公开(公告)日：2019-06-06
申请号：US15833156
申请日：2017-12-06
Applicant: Caterpillar Inc.
Inventor： Bryan Edward Nelson , Sana Mahmood , Stephen R. Lewis
Abstract: A valve assembly for a pump includes an electrical actuator having a stator and an armature, where the armature includes a top armature surface facing the stator and having an inwardly stepped-up profile that forms a raised surface at a radially inward location, and a lower, gap-forming surface at a radially outward location that forms a gap between the armature and the stator when the electrical actuator is activated to facilitate displacing fluid and avoiding production of high velocity, potentially damaging fluid flows.
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公开(公告)号：US10041484B2
公开(公告)日：2018-08-07
申请号：US14610669
申请日：2015-01-30
Applicant: Caterpillar Inc.
Inventor： Joshua W. Steffen , Sunil J. Bean , Adrienne M. Brasche , Cory A. Brown , Sana Mahmood
Abstract: A pump is disclosed having a manifold with an inlet, a pressure outlet, and a return outlet. The pump may also have a jacket connected to an end of the manifold to create an enclosure that is in fluid communication with the inlet of the manifold, and at least one pumping mechanism extending from the manifold into the jacket. The at least one pumping mechanism may have an inlet open to the enclosure and an outlet in communication with the pressure outlet of the manifold. The pump may further have a standpipe extending from the manifold into the enclosure. The standpipe may be in communication with the return outlet of the manifold.
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