WO2004085859A1 - 油圧シリンダ装置 - Google Patents
油圧シリンダ装置 Download PDFInfo
- Publication number
- WO2004085859A1 WO2004085859A1 PCT/JP2004/004280 JP2004004280W WO2004085859A1 WO 2004085859 A1 WO2004085859 A1 WO 2004085859A1 JP 2004004280 W JP2004004280 W JP 2004004280W WO 2004085859 A1 WO2004085859 A1 WO 2004085859A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hydraulic
- hydraulic cylinder
- hydraulic cylinders
- cylinder device
- cylinders
- Prior art date
Links
Classifications
-
- 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
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2267—Valves or distributors
-
- 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
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
-
- 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
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2271—Actuators and supports therefor and protection therefor
-
- 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
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2275—Hoses and supports therefor and protection therefor
-
- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/006—Hydraulic "Wheatstone bridge" circuits, i.e. with four nodes, P-A-T-B, and on-off or proportional valves in each link
-
- 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
- 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
- F15B11/22—Synchronisation of the movement of two or more servomotors
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
-
- 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
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/3056—Assemblies of multiple valves
- F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
- F15B2211/30575—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve in a Wheatstone Bridge arrangement (also half bridges)
-
- 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
- F15B2211/30—Directional control
- F15B2211/32—Directional control characterised by the type of actuation
- F15B2211/327—Directional control characterised by the type of actuation electrically or electronically
-
- 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
- F15B2211/63—Electronic controllers
-
- 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
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
-
- 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
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
- F15B2211/7114—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators
- F15B2211/7128—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators the chambers being connected in parallel
-
- 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
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
- F15B2211/7142—Multiple output members, e.g. multiple hydraulic motors or cylinders the output members being arranged in multiple groups
Definitions
- the present invention relates to an improvement in a hydraulic cylinder device that drives, for example, a boom of a construction working machine.
- a hydraulic cylinder for example, as disclosed in Japanese Patent Laid-Open Publication No. 2002-221114, a hydraulic cylinder is provided for supplying and discharging hydraulic oil.
- a flexible hose and the like were connected, and this flexible hose was arranged along the boom and the like of the working machine, and had a structure capable of following the movement thereof.
- the metal pipe connecting the hydraulic cylinder and the control pulp is The purpose of the present invention is to minimize the generation of stresses.
- the present invention prevents a large strain stress from being applied to a metal pipe even when a metal pipe branched in the middle from a single control valve is connected to a pair of hydraulic cylinders which are relatively easily displaced. Aim.
- the present invention relates to a hydraulic cylinder device, comprising: a pair of hydraulic cylinders connected to a driven member, arranged in parallel with each other, and extended and contracted in synchronization with each other; An elastic support mechanism for supporting the hydraulic cylinders between the pair of hydraulic cylinders, and an elastic support mechanism for supporting the hydraulic control cylinders between the pair of hydraulic cylinders; A control valve, comprising: a metal pipe for guiding hydraulic oil controlled by the control valve; and a bending portion provided in the middle of the metal pipe and deforming flexibly as the respective hydraulic cylinders are relatively displaced. The difference in the relative displacement of each hydraulic cylinder with respect to is absorbed.
- FIG. 1 is a front view of a working machine showing an embodiment of the present invention.
- FIG. 2 is a side view of the working machine.
- FIG. 3 is a front view of the hydraulic cylinder device.
- FIG. 4 is a rear view of the hydraulic cylinder device.
- FIG. 5 is a side view of the hydraulic cylinder device.
- FIG. 6 is a plan view of the hydraulic cylinder device as viewed from above.
- FIG. 7 is a plan view of the hydraulic cylinder device as viewed from below.
- FIG. 8 is a sectional view of the elastic support mechanism.
- FIG. 9 is a hydraulic circuit diagram. BEST MODE FOR CARRYING OUT THE INVENTION
- the construction work implement 1 includes a work implement main body 2 that rotates in a horizontal plane, and a front end of the work implement main body 2 is connected to a boom that is rotatably connected to a vertical plane. 3 is attached.
- a pair of hydraulic cylinders 10 are provided to drive the boom 3.
- An arm 4 is rotatably connected to the end of the boom 3, and the arm 4 is driven by one hydraulic cylinder 9.
- a bucket 5 is rotatably connected to the tip of the arm 4, and the bucket 5 is driven by one hydraulic cylinder 8.
- the working machine body 2 is equipped with a hydraulic power unit, and high-pressure hydraulic oil guided from the hydraulic power unit is supplied to each of the hydraulic cylinders 8 to 10 so that these cylinders expand and contract. Perform the operation.
- the operator operating the work machine 1 expands and contracts the hydraulic cylinders 8 to 10 to move the packet 5, the arm 4, or the boom 3, respectively, to perform the excavation of the ground and the transport of earth and sand.
- the pair of hydraulic cylinders 10 are disposed on both sides of the boom 3 so as to sandwich the boom 3 from the left and right.
- each of the hydraulic cylinders 10 when a piston (not shown) receives hydraulic pressure, the piston rod 12 moves with respect to the cylinder tube 11 so as to expand and contract.
- the base end of each cylinder tube 11 is rotatably connected to the front of the working machine body 2 via a support shaft 13, and the distal end of each piston port 12 connects the support shaft 14. And connected to both sides of the boom 3 via. Therefore, when the hydraulic cylinder 10 extends, the boom 3 pivots upward, and when the hydraulic cylinder 10 contracts, it pivots downward.
- a control valve 20 is attached to the two hydraulic cylinders 10 that drive the boom 3, between the hydraulic cylinders 10.
- the hydraulic cylinders 10 extend and contract in synchronism with each other by hydraulic oil supplied and discharged through the control valve 20 from a hydraulic source.
- Control port located between two hydraulic cylinders 10 as shown in Figs. 3 to 7
- the valve 20 is attached to a base plate 60 provided between the cylinder tubes 11 below the boom 3.
- the base plate 60 is connected to and supported by each hydraulic cylinder tube 11 via four flexible support mechanisms 50 arranged at the four corners.
- the elastic support mechanism 50 will be described. As shown in FIG. 8, a band 51 wound around a cylinder tube 11 of a hydraulic cylinder 10 and a bolt 53 and a nut The sleeve 52 and the washer 55, which are fastened through the base 54, the hole 56 provided in the base plate 60 for passing the sleeve 52, and the sleeve 52 and the base plate 60 are interposed. And a push 57 made of an elastic material such as rubber.
- the band 51 includes a pair of semi-annular band members 58, 59 and a pair of bolts 49 for fastening both ends of the band members 58, 59.
- the band 51 includes a hydraulic cylinder 10 It is detachably wound around the outer peripheral surface of the cylinder tube 11.
- a support arm 48 is connected to one of the belt members 58 by welding, and a bolt 53 is passed through the support arm 48.
- the bush 57 has a cylindrical tube portion 57a interposed between the sleeve 52 and the hole 56, and a disk-shaped flange portion 57b interposed between the support member 48 and the base plate 60. These are integrally formed by an elastic material such as rubber. As a result, even if a relative displacement occurs between the two hydraulic cylinders 10, the displacement is absorbed so that the base plate 60 is not deformed.
- the base plate 60 is attached to a rear surface 60b which is a rear surface of the base plate 60 in the vehicle longitudinal direction.
- the base plate 60 functions as a protection member for preventing an obstacle from hitting the control valve 20.
- the control pulp 20 and the pair of hydraulic cylinders 10 are connected by metal pipes 30 and 40.
- the metal pipes 30 and 40 have higher pipe strength than flexible hoses and the like, and have sufficient pressure resistance against high pressure.
- the metal pipe 30 and the metal pipe 40 are formed symmetrically about a center line O between the pair of hydraulic cylinders 10 shown in FIG. As a result, the control pulp 20 supplies and discharges each hydraulic cylinder 10 Thus, the hydraulic cylinders 10 can be operated synchronously by equalizing the flow of hydraulic oil.
- the metal pipe 30 connects the control valve 20 with the hydraulic chamber on the piston rod side of each hydraulic cylinder 10.
- the metal pipe 30 is connected to the control pulp 20 via a connector 36 via one base pipe 32 and connected to the tip end of each cylinder tube 11 via a connector 35 2
- An L-shaped branch pipe 31 is provided, and a T-shaped connector 33 for connecting the base pipe 32 and each branch pipe 31 is provided.
- the base tube 32 has both ends connected to the connectors 33 and 36 extending at right angles to each other, and has a curved portion 32a on the way.
- the bending displacement of the curved portion 32 a absorbs a difference in relative displacement of the base plate 60 with respect to each hydraulic cylinder 10.
- Each L-shaped branch pipe 31 includes a pipe section 31a extending along the cylinder tube 11, a pipe section 31b extending perpendicular to the cylinder tube 11, a pipe section 31a and a pipe section. 3 1 and a curved portion 3 1 c.
- the flexural deformation of the curved portion 31c absorbs the relative displacement difference between the hydraulic cylinders 10.
- the curved portion 32a of the base tube 32 and the curved portion 31c of the branch tube 31 are both curved in a substantially perpendicular range, and are curved in planes perpendicular to each other. This makes it possible to absorb three-dimensional distortion.
- the metal pipe 40 connects the control port pulp 20 with the hydraulic chamber on the end side of each hydraulic cylinder 10.
- the metal pipe 40 is connected to the control valve 20 via a connector 46 via one U-shaped base pipe 42 and connected to the base end of each cylinder tube 11 via a connector 45.
- two T-shaped connectors 43 connecting the base tube 42 and the respective branch tubes 41 to each other.
- the base tube 42 has two ends 42b, 42c connected to the connectors 43, 46, and a curved portion 42a connecting the ends 42b, 42c. Having. In this case, both ends 42b and 42c of the U-shaped base tube 42 extend in parallel on both sides across the base plate 60, and the curved portion 42a is formed at the end of the base plate 60 at the end of the base plate 60. It is curved in an arc so as to make a turn. The bending deformation of the curved portion 42 a absorbs the difference in the relative displacement of the base plate 60 with respect to each hydraulic cylinder 10.
- the branch pipe 41 includes a pipe 41 a extending along the cylinder tube 11, a pipe 41 b extending perpendicular to the cylinder tube 11, and a pipe 41 a and a pipe 41 b. And a curved portion 4 1c to be connected. By bending and deforming the curved portion 41c, the relative displacement difference between the hydraulic cylinders 10 is absorbed.
- the curved portion 4 2a of the base pipe 42 and the curved portion 41c of the branch pipe 41 are curved in mutually perpendicular planes, thereby absorbing three-dimensional distortion. Become.
- the control port pulp 20 is provided closer to the end side end lib than the piston rod side end 11a of each cylinder tube 11, and the piston rod side metal pipe 30 is connected to the end side metal.
- the pipe length is longer than the pipe 40.
- the control valve 20 is composed of four flow regulating valves 21 a assembled in a bridge circuit, and the supply passage 23 and the return passage 25 are formed by a pair of hydraulic cylinders 10.
- the hydraulic cylinder is selectively connected to each of the hydraulic chambers, and the hydraulic cylinder 10 is extended and contracted.
- the supply passage 23 communicates with the hydraulic pump 22, and the return passage 25 communicates with the reservoir 24.
- a control valve constituted by four flow control valves 21 is similarly attached to the hydraulic cylinder 9 for driving the arm 4.
- each flow control valve 21a is controlled by a drive current sent from a control device (not shown) in the control valve 20, whereby the supply amount of hydraulic oil to each hydraulic chamber of the hydraulic cylinder 10 is controlled. And the discharge amount, whereby the extension speed or the contraction speed of the hydraulic cylinder 10 is adjusted. Also, when each flow regulating valve 21a is completely closed, or when the flow regulating valve connected to the hydraulic chamber on the side where the load of the hydraulic cylinder 10 is loaded is completely closed, the hydraulic cylinder 10a is closed. This prevents the hydraulic oil from flowing out of the boom, thereby preventing the boom 3 from falling due to the load.
- Control valve 20 switches supply / discharge of hydraulic oil to / from each hydraulic cylinder 10
- the hydraulic cylinder 10 is extended and retracted in synchronization with each other, and the flow of hydraulic oil flowing out of the hydraulic cylinder 10 is stopped to hold the boom 3 at that position and prevent the boom 3 from dropping. Perform the function of
- metal pipes 30 and 40 do not have elasticity like flexible tubes, so their ability to absorb stress due to deformation and distortion is low.
- the metal wiring connecting each hydraulic cylinder 10 and the control pulp 20 is generated. ⁇ ⁇ Distortion occurs in 30 and 40.
- the difference in relative displacement of the control valve 20 with respect to each hydraulic cylinder 10 is absorbed by the elastic deformation of the push 57 of each elastic support mechanism 50, and at the same time, each bending section 3 of the metal pipe 30 is absorbed.
- the metal pipe 40 has a curved portion 42 a of the base pipe 42 which is curved in a semicircular shape so as to sandwich the base plate 60, the amount of embracing deformation is large, and The relative displacement difference of the base plate 60 can be sufficiently absorbed, and damage to the piping can be prevented.
- the mouth end 11a of the cylinder tube 11 near the boom side has a larger relative displacement than the end end 11b following the deformation and movement of the boom 3 than the end end 11b.
- a valve 20 is provided closer to the end-side end lib than the rod-side end 11a of each cylinder tube 11, and the metal pipe 30 has a longer pipe length than the metal pipe 40. Therefore, despite the large relative displacement, the bending angle generated in the metal pipe 30 is small, and the generated stress can be suppressed small.
- control valve 20 is mounted on the base plate 60, but the control valve is Can be directly supported.
- This invention is applicable as a hydraulic cylinder device of an industrial machine.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Actuator (AREA)
- Shovels (AREA)
- Component Parts Of Construction Machinery (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/528,859 US7137331B2 (en) | 2003-03-26 | 2004-03-26 | Hydraulic cylinder device |
GB0507865A GB2409500B (en) | 2003-03-26 | 2004-03-26 | Hydraulic cylinder apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003084903A JP4124685B2 (ja) | 2003-03-26 | 2003-03-26 | 液圧シリンダ装置 |
JP2003-084903 | 2003-03-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004085859A1 true WO2004085859A1 (ja) | 2004-10-07 |
Family
ID=33095005
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/004280 WO2004085859A1 (ja) | 2003-03-26 | 2004-03-26 | 油圧シリンダ装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US7137331B2 (ja) |
JP (1) | JP4124685B2 (ja) |
GB (1) | GB2409500B (ja) |
WO (1) | WO2004085859A1 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5238181B2 (ja) * | 2007-04-17 | 2013-07-17 | カヤバ工業株式会社 | 油圧ショベル |
JP5864968B2 (ja) * | 2011-09-07 | 2016-02-17 | 株式会社東和製作所 | 流体シリンダ装置 |
EP4269703A1 (en) * | 2022-04-29 | 2023-11-01 | Sandvik Mining and Construction Oy | An actuator mounting arrangement and a mining machine |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0972306A (ja) * | 1995-09-02 | 1997-03-18 | Yutani Heavy Ind Ltd | 油圧作業車両の油圧通路連結構造 |
JPH1054407A (ja) * | 1996-08-09 | 1998-02-24 | Kayaba Ind Co Ltd | 油圧シリンダ装置 |
JP2001099356A (ja) * | 1999-09-28 | 2001-04-10 | Kobelco Contstruction Machinery Ltd | 作業機械のバルブ取付装置 |
JP2001295810A (ja) * | 2000-04-14 | 2001-10-26 | Komatsu Ltd | 油圧シリンダの装着弁 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1195980A (en) * | 1916-08-29 | Motor | ||
US5860233A (en) * | 1997-04-14 | 1999-01-19 | Caterpillar Inc. | Valve configuration and mounting arrangement |
JP2000205999A (ja) | 1999-01-08 | 2000-07-28 | Fujikura Ltd | 光ファイバ測定装置 |
-
2003
- 2003-03-26 JP JP2003084903A patent/JP4124685B2/ja not_active Expired - Fee Related
-
2004
- 2004-03-26 US US10/528,859 patent/US7137331B2/en not_active Expired - Fee Related
- 2004-03-26 WO PCT/JP2004/004280 patent/WO2004085859A1/ja active Application Filing
- 2004-03-26 GB GB0507865A patent/GB2409500B/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0972306A (ja) * | 1995-09-02 | 1997-03-18 | Yutani Heavy Ind Ltd | 油圧作業車両の油圧通路連結構造 |
JPH1054407A (ja) * | 1996-08-09 | 1998-02-24 | Kayaba Ind Co Ltd | 油圧シリンダ装置 |
JP2001099356A (ja) * | 1999-09-28 | 2001-04-10 | Kobelco Contstruction Machinery Ltd | 作業機械のバルブ取付装置 |
JP2001295810A (ja) * | 2000-04-14 | 2001-10-26 | Komatsu Ltd | 油圧シリンダの装着弁 |
Also Published As
Publication number | Publication date |
---|---|
GB2409500A (en) | 2005-06-29 |
JP4124685B2 (ja) | 2008-07-23 |
GB0507865D0 (en) | 2005-05-25 |
US7137331B2 (en) | 2006-11-21 |
US20060162545A1 (en) | 2006-07-27 |
JP2004293089A (ja) | 2004-10-21 |
GB2409500B (en) | 2006-05-31 |
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