CN113464509A - 液压系统、作业车辆和排液系统 - Google Patents
液压系统、作业车辆和排液系统 Download PDFInfo
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- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/005—Filling or draining of fluid systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
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- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/226—Safety arrangements, e.g. hydraulic driven fans, preventing cavitation, leakage, overheating
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- E—FIXED CONSTRUCTIONS
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- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
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- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
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- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
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- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
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- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
- F15B21/0423—Cooling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
- F16H61/4148—Open loop circuits
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- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
- F16H61/4165—Control of cooling or lubricating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/40—Special vehicles
- B60Y2200/41—Construction vehicles, e.g. graders, excavators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/26—Supply reservoir or sump assemblies
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20546—Type of pump variable capacity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20576—Systems with pumps with multiple pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/615—Filtering means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
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- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
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- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/78—Control of multiple output members
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- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
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Abstract
本公开涉及液压系统、作业车辆和排液系统。一种用于作业机械的排液系统包括静液压泵、储罐、冷却器、第一导管和第二导管。静液压泵被配置为由原动机驱动。储罐被配置为储存从静液压泵排放的流体。冷却器设置在储罐的上游。第一导管将静液压泵联接到冷却器。第二导管将静液压泵直接联接到储罐。
Description
技术领域
本公开涉及用于作业机械的液压系统。更具体地,本公开涉及用于液压系统的排放管。
背景技术
US20180163375描述了一种作业机械的液压系统。然而,当作业机械空转时,需要一个静液压泵壳壳体排放管来冷却。
发明内容
在一个独立方面,一种用于作业机械的液压系统包括静液压泵、储罐、冷却器、第一导管和第二导管。静液压泵被配置为由原动机驱动。储罐被配置为储存从静液压泵排放的流体。冷却器设置在储罐的上游。第一导管将静液压泵联接到冷却器。第二导管将静液压泵直接联接到储罐。
在另一个独立方面,一种作业车辆包括原动机、底盘、多个牵引构件、作业附件和液压系统。多个牵引构件沿着表面支撑和推动底盘。作业附件被支撑在臂的端部上。用于作业机械的排液系统包括静液压泵、储罐、冷却器、第一导管和第二导管。静液压泵被配置为由原动机驱动。储罐被配置为储存从静液压泵排放的流体。冷却器设置在储罐的上游。第一导管将静液压泵联接到冷却器。第二导管将静液压泵直接联接到储罐。
在另一个独立方面,一种用于作业机械的排液系统包括第一导管和第二导管。第一导管联接到第一静液压泵、第二静液压泵和冷却器。冷却器设置在储罐的上游。第二导管联接到第一静液压泵、第二静液压泵并直接联接到储罐。第二导管未连接到冷却器。
优选地,该排液系统还包括联接到第二马达、所述第一导管和所述冷却器的第四导管,并且其中,所述第二马达由所述第二静液压泵驱动。
优选地,该排液系统还包括连接到所述储罐、所述冷却器、过滤器和主控制阀的第五导管。
优选地,该排液系统还包括联接到所述过滤器和所述储罐的第六导管,所述第六导管未连接到所述冷却器。
通过考虑具体实施方式和附图,本公开的其他方面将变得清楚。
附图说明
图1是作业车辆的立体图。
图2是图1的作业车辆的液压系统的示意图。
图3是图2的液压系统的特写图,该特写图详细示出了静液压泵。
图4是图2的液压系统的排放管路的示意图。
具体实施方式
在详细说明本公开的任何实施方式之前,应理解,本公开的应用不限于以下描述中阐述的或者在以下附图中例示的部件的构造和布置的细节。本公开能够支持其他实施方式并且以各种方式实践或执行。另外,应理解,本文使用的用词和术语是出于描述的目的,不应该被视为限制。
图1例示了诸如紧凑型履带式装载机10这样的作业车辆,其包括底盘14和用于沿表面支撑和推动底盘14的牵引构件(例如,履带牵引机构18)。车辆10还包括驾驶室22,并且工具或作业附件(例如,铲斗30)被支撑在臂34的端部上。在所例示的实施方式中,每个履带牵引机构18包括驱动链轮42、联接到底盘14的履带底盘车架46以及履带50。驱动链轮42由电机54驱动并与履带50接合,履带50本身绕驱动链轮42和底盘车架46被无限循环地驱动。
尽管作业车辆10被例示和描述为装载机,但应理解,作业车辆可具有不同形式,诸如挖掘机、推土机、平地机、铲土机或另一类型的建筑、采掘、农用或公用事业机械。另外,尽管作业附件被例示和描述为铲斗,但应理解,作业附件可具有不同形式,诸如螺旋钻、破碎机、松土器、抓斗或用于挖掘、破碎、处理、搬运、倾倒或以其他方式接合灰尘或其他物料的某种其他类型的附件。另外,可能能够从臂34拆卸作业附件,以允许另一类型的作业附件联接到臂34。
参考图2,臂34可经由液压系统100移动。换句话说,液压系统100驱动一系列致动器来移动臂34。液压系统包括原动机104、液压泵108、左马达112、右马达116和液压驱动装置120。
原动机104可以是电动机、发动机和/或类似物。原动机104被配置为向液压驱动装置120提供动力,液压驱动装置120进而驱动液压泵108。驱动液压泵108驱动了构成一批阀的主控制阀124来控制臂34的操作。
特别地,液压泵108被配置为对储存在储罐128中的液压流体进行加压并将加压流体输送到主控制阀124。来自液压泵108的输出流体管132包括补偿器136,补偿器136比较离开液压泵108之后的液压流体的压力,以确保输出的液压流体包括足够高的压力。主控制阀124另外将先导压力供应给补偿器136。换句话说,主控制阀124操作性地控制来自液压泵108的流量来控制臂34。
液压驱动装置120包括用于驱动左马达112的驱动回路和用于驱动右马达116的驱动回路。
参考图3,各驱动回路具有被配置为经由原动机104被驱动的静液压泵或HST泵140。HST泵140是可变容量轴向泵,其具有斜盘以及被施加先导压力的前向压力接收部和后向压力接收部。施加到压力接收部的先导压力改变了斜盘的角度,由此改变了HST泵140的输出和所施加的合成扭矩。HST泵140各自增加了供分别输送到左马达112和右马达116的流体的压力。换句话说,HST泵140驱动左马达112和右马达116。
左马达112被配置为将动力传递到设置在作业车辆10左侧的传动轴。右马达116是被配置为将动力传递到设置在作业车辆10右侧的传动轴的马达。变速换档阀144(图2中示出)将先导压力供应给左马达112和右马达116,这调整了斜盘。调整斜盘改变了给定输入下的传动轴速度和传动轴的扭矩比。
参考图2和图4,液压系统100还包括一系列排放管,以排放来自HST泵140、左马达112、右马达116和主控制阀124的过量液压流体。
设置主回流回路148以从主控制阀124排放过量的液压流体。主回流回路148包括连接到过滤器156的输入端和输出端的主管路152。冷却器160设置在通向储罐128的主管路152内。冷却器160设置在过滤器156的下游。
高压冷却器旁路164设置在主回流回路148中。高压冷却器旁路164从过滤器156延伸到储罐128,由此绕过冷却器160。换句话说,高压冷却器旁路164从主管路152靠近过滤器输出端分支并联接到储罐128,使得高压冷却器旁路164仅联接到过滤器156和储罐128。当液压流体的压力足够高时,在高压冷却器旁路164的入口处的冷却器安全阀168允许液压流体进入高压冷却器旁路164。在一个实施方式中,足够高被定义为高于80psi的绝对压力。在另外的实施方式中,冷却器安全阀168可在低于80psi的压力下允许流动。高压冷却器旁路164保护冷却器160免受增加的回流压力尖峰。换句话说,高压冷却器160使具有高压的液压流体能够直接进入储罐128。这防止了由于流体的高压导致的冷却器160上的过度应变。
设置从HST泵140、左马达112和右马达116延伸的附加排放管。从HST泵140延伸的排放管(被称为HST管路172)被与从左马达112延伸的排放管(被称为左马达管路176)以及从右马达116延伸的排放管(被称为右马达管路180)一起搁置。HST管路172、左马达管路176和右马达管路180汇合形成单个壳体排放管184,隔离器止回阀188设置在壳体排放管184内。在隔离器止回阀188的下游,单个壳体排放管184排放到主回流回路148,从而与过滤器156和冷却器160之间的主管路汇合。换句话说,单个壳体排放管184联接到过滤器156的输出端和冷却器160的输入端之间的主管路152。
HST管线172包括低压旁路192,低压旁路192在HST管路172与左马达管路176和右马达管路180汇合之前从HST管路172分支。低压旁路192将HST管路172直接联接到储罐128。换句话说,低压旁路192仅联接到HST管路172和储罐128。当液压流体的压力低于25psi的绝对压力时,旁路192中的止回阀196允许液压流体流动。在另外的实施方式中,当液压流体的压力高于25psi时,止回阀196可允许流体流动。
还设置从泵到储罐的排放管以及从变速换挡阀到储罐的排放管。这些排放管直接从泵和变速换档阀延伸到储罐,而不用附加的过滤器或旁路。在一些实施方式中,这些排放管可包括过滤器、旁路、分支等。另外的实施方式可包括另外的排放管和/或附加的部件。在操作中,主管路152引导来自主控制阀124的过量液压流体通过过滤器。如果绝对压力低于80psi,则液压流体被引导通过冷却器160。然后,冷却后的流体被引导到储罐128。如果绝对压力高于80psi,则液压流体进入高压冷却器旁路164。高压冷却器旁路164将已经经过过滤器的液压流体直接引导到储罐128。
另外,HST管路172、左马达管路176和右马达管路180分别将流体从HST泵140、左马达112和右马达116排放到单个壳体排放管184。然后,流体被引导通过隔离器止回阀188。此后,流体被在主管路152中排放,随后被冷却器160冷却。然后,冷却后的流体被引导到储罐128。当由于寒冷天气而导致流体的压降高时,使用低压旁路192。如果在HST管路172中的流体绝对压力高于25psi的绝对压力时,则流体被引导到储罐128。这保护了HST泵140、左马达112和右马达116免受可能造成内部部件受损的发展中的排放压力。
因此,本公开提供了包括具有低压旁路和高压旁路以防止液压系统遭受过度应变的壳体排放管的液压系统,还有其他。在随附的权利要求书中阐述了本公开的各种特征和优点。
Claims (15)
1.一种用于作业机械的液压系统,该液压系统包括:
静液压泵,其被配置为由原动机驱动;
储罐,其被配置为储存从所述静液压泵排放的流体;
冷却器,其设置在所述储罐的上游;
第一导管,其将所述静液压泵联接到所述冷却器;以及
第二导管,其将所述静液压泵直接联接到所述储罐。
2.根据权利要求1所述的液压系统,该液压系统还包括被配置为由所述静液压泵驱动的静液压马达。
3.根据权利要求2所述的液压系统,该液压系统还包括被配置为将所述静液压马达联接到所述冷却器的第三导管。
4.根据权利要求1所述的液压系统,该液压系统还包括主控制阀,所述主控制阀能经由被配置为由所述原动机驱动的液压泵操作。
5.根据权利要求4所述的液压系统,该液压系统还包括第四导管,所述第四导管将所述主控制阀联接到所述冷却器。
6.根据权利要求5所述的液压系统,该液压系统还包括第五导管,所述第五导管将所述第四导管联接到所述冷却器下游的所述储罐。
7.根据权利要求5所述的液压系统,其中,所述第四导管将所述主控制阀联接到所述冷却剂上游的过滤器。
8.一种作业车辆,该作业车辆包括:
原动机;
底盘;
多个牵引构件,其用于沿表面支撑和推动所述底盘;
作业附件,其被支撑在臂的端部上;以及
液压系统,其被配置为从所述原动机接收动力并移动所述臂和所述多个牵引构件,所述液压系统包括:
静液压泵,其被配置为由所述原动机驱动;
储罐,其被配置为储存从所述静液压泵排放的流体;
冷却器,其设置在所述储罐的上游;
第一排放管,其将所述静液压泵联接到所述冷却器;以及
第二排放管,其将所述静液压泵连接到所述储罐而非所述冷却器。
9.根据权利要求8所述的作业车辆,其中,所述液压系统包括被配置为由所述静液压泵驱动的静液压马达。
10.根据权利要求9所述的作业车辆,其中,所述液压系统包括将所述静液压马达连接到所述第一排放管的第三排放管。
11.根据权利要求8所述的作业车辆,其中,所述液压系统包括主控制阀,所述主控制阀能经由液压泵操作以控制所述臂,所述液压泵被配置为由所述原动机驱动。
12.根据权利要求11所述的作业车辆,其中,所述液压系统包括第四排放管,所述第四导管将所述主控制阀连接到设置在所述储罐上游的过滤器。
13.根据权利要求12所述的作业车辆,其中,所述液压系统包括第五排放管,所述第五导管将所述过滤器连接到所述储罐。
14.一种用于作业机械的排液系统,该排液系统包括:
第一导管,其联接到第一静液压泵、第二静液压泵和冷却器,所述冷却器设置在储罐的上游;以及
第二导管,其联接到所述第一静液压泵、所述第二静液压泵并直接联接到所述储罐,所述第二导管未连接到所述冷却器。
15.根据权利要求14所述的排液系统,该排液系统还包括联接到第一马达、所述第一导管和所述冷却器的第三导管,并且其中,所述第一马达由所述第一静液压泵驱动。
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Application Number | Priority Date | Filing Date | Title |
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US16/836,031 | 2020-03-31 | ||
US16/836,031 US20210301842A1 (en) | 2020-03-31 | 2020-03-31 | Drain for hydraulic system |
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CN113464509A true CN113464509A (zh) | 2021-10-01 |
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US (1) | US20210301842A1 (zh) |
CN (1) | CN113464509A (zh) |
BR (1) | BR102021002605A2 (zh) |
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Publication number | Priority date | Publication date | Assignee | Title |
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US3945208A (en) * | 1974-01-02 | 1976-03-23 | Allis-Chalmers Corporation | Filtration for integrated tractor hydraulic system |
US6460655B2 (en) * | 2001-01-18 | 2002-10-08 | Deere & Company | Vehicle hydraulic system |
US6681568B2 (en) * | 2002-03-28 | 2004-01-27 | Caterpillar Inc | Fluid system for two hydraulic circuits having a common source of pressurized fluid |
DE102011083874A1 (de) * | 2011-09-30 | 2013-04-04 | Putzmeister Engineering Gmbh | Hydrauliksystem mit Saug-Rücklauffilter |
US9982246B2 (en) * | 2016-08-11 | 2018-05-29 | Fitzsimmons Hydraulics, Inc. | Fluid delivery systems including hydraulic drive systems |
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2020
- 2020-03-31 US US16/836,031 patent/US20210301842A1/en not_active Abandoned
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2021
- 2021-02-11 BR BR102021002605-7A patent/BR102021002605A2/pt not_active IP Right Cessation
- 2021-02-24 CN CN202110206190.2A patent/CN113464509A/zh active Pending
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US20210301842A1 (en) | 2021-09-30 |
BR102021002605A2 (pt) | 2022-01-04 |
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