GB2184419A - Complete swivel type backhoe vehicle - Google Patents

Complete swivel type backhoe vehicle Download PDF

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Publication number
GB2184419A
GB2184419A GB08619945A GB8619945A GB2184419A GB 2184419 A GB2184419 A GB 2184419A GB 08619945 A GB08619945 A GB 08619945A GB 8619945 A GB8619945 A GB 8619945A GB 2184419 A GB2184419 A GB 2184419A
Authority
GB
United Kingdom
Prior art keywords
driver
boom
excavator
boom assembly
bucket
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB08619945A
Other versions
GB2184419B (en
GB8619945D0 (en
Inventor
Kazuhiko Tsuji
Akira Takashima
Masao Masumoto
Masaru Kumatani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kubota Corp
Original Assignee
Kubota Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kubota Corp filed Critical Kubota Corp
Publication of GB8619945D0 publication Critical patent/GB8619945D0/en
Publication of GB2184419A publication Critical patent/GB2184419A/en
Application granted granted Critical
Publication of GB2184419B publication Critical patent/GB2184419B/en
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/30—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • E02F3/32—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom working downwardly and towards the machine, e.g. with backhoes
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/30—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • E02F3/32—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom working downwardly and towards the machine, e.g. with backhoes
    • E02F3/325—Backhoes of the miniature type
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/38—Cantilever beams, i.e. booms;, e.g. manufacturing processes, forms, geometry or materials used for booms; Dipper-arms, e.g. manufacturing processes, forms, geometry or materials used for dipper-arms; Bucket-arms
    • E02F3/382—Connections to the frame; Supports for booms or arms
    • E02F3/384—Connections to the frame; Supports for booms or arms the boom being pivotable relative to the frame about a vertical axis
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/96—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
    • E02F3/963—Arrangements on backhoes for alternate use of different tools
    • E02F3/964—Arrangements on backhoes for alternate use of different tools of several tools mounted on one machine
    • 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
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/10—Supports for movable superstructures mounted on travelling or walking gears or on other superstructures
    • E02F9/12—Slewing or traversing gears
    • E02F9/121—Turntables, i.e. structure rotatable about 360°
    • 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
    • E02F9/16—Cabins, platforms, or the like, for drivers
    • E02F9/163—Structures to protect drivers, e.g. cabins, doors for cabins; Falling object protection structure [FOPS]; Roll over protection structure [ROPS]

Abstract

An excavator comprises an upper carriage (5) swivellable 360 degrees on chassis (3) and a boom assembly including a boom (10), a bucket arm (11) and a bucket 12. The boom assembly is pivotable on a vertical axis (Y) located in a front portion of the upper carriage (5) and adjacent a mid-position transversely of the excavator. The boom (10) is angled to have a boomerang shape, the bucket arm (11) being substantially half in length of the boom (10). The boom (10) and bucket arm (11) have a pivotal point (Z) therebetween located substantially at the mid-position transversely of the excavator when the boom assembly assumes a first position, (as shown), in which the boom assembly as folded up is erected to a limit and pivoted to an extent where a side face of the bucket (12) is located in front of the driver's section. The pivotal point (Z) is located substantially over a forward end of boom assembly holder (14) when the boom assembly assumes a second position in which the boom assembly as folded up is at an intermediate pivoting position and erected to the limit with a back face of the bucket (12) opposed to said driver's section, (Fig. 5). <IMAGE>

Description

SPECIFICATION Complete swivel type backhoe vehicle Background of the Invention The present invention relates to a complete swivel type backhoe vehicle or excavator comprising a chassis including right and left traveling device, an upper carriage swivellable 360 degrees on the chassis, and a boom assembly attached to the upper carriage to be pivotable on a vertical axis, wherein the boom assembly in a contained position suited for vehicle traveling is located in a locus circle determined by an outer contour of the upper carriage.
A conventional excavator of this type is known, for example, from a European patent laying-open publication No. 0 131 939 Al.
The excavator disclosed therein has a boom assembly holder located at a laterally displaced position on the front end of the upper carriage. The boom assembly as folded up is erected to a limit and is brought close to a swivel axis of the upper carriage by pivoting the boom assembly until a side face of the bucket is brought close to a front end of the driver's section, thereby to reduce a space required for swivelling the upper carriage.
However, since in the above excavator the boom assembly holder is displaced laterally of the upper carriage, a swivel position of the upper carriage for securing the reduced space for its swivelling is different from a swivel position thereof for providing a main excavating position. Therefore, when in a narrow excavating site the boom assembly including a bucket filled with earth and sand is erected to a limit and is pivoted to a limit position in which a side face of the bucket is close to the front of the driver's section, and thereafter the upper carriage is swivelled backward describing a small locus circle to empty the earth and sand onto a truck standing by, for example, this series of operations includes the pivoting of the boom assembly and the swivelling of the upper carriage, which not only results in loss of time but involves a very complicated control operation.However, if the pivoting of the boom assembly were omitted in order to avoid the above drawbacks, a very large space would be required for swivelling the upper carriage and the foregoing operation would be impossible in a narrow site.
Furthermore, the displacement of the boom assembly holder laterally of the front of the upper carriage has the following disadvantage.
When the upper carriage is in the swivel position suited for traveling, the boom assembly is located forwardly of one of the traveling devices. In order to carry out an excavating operation in a usual manner in which digging work is effected at a mid-position transversely of the excavator, it is necessary to bring the boom assembly to the transversely mid-position by swivelling the upper carriage a substantial degree. In order to facilitate control operation by the driver in the above two swivel positions, his seat must be transferable to suit the respective swivel positions. The provision of a transferable seat not only involves a complicated seat structure at an increased manufacturing cost, but requires a large space around the seat in the driver's section which is detrimental to the attempt to minimize the locus circle of the upper carriage.
Summary of the Invention The object of the present invention is to provide an excavator which displays a high degree of efficiency in a narrow site, and in which the space in the driver's section is reduced within an extent that its functions are not impaired and the boom assembly is located close to the swivel axis of the upper carriage thereby minimizing the locus circle of the entire upper carriage.
In order to achieve this object, an excavator according to the present invention is characterized in that the boom assembly is pivotable on a vertical axis located in a front portion of the upper carriage and adjacent a mid-position transversely of the excavator, the boom is angled adjacent a longitudinally midposition to have a boomerang shape, the bucket arm being substantially half in length of the boom, the boom and bucket arm have a pivotal point therebetween located substantially at the midposition transversely of the excavator when the boom assembly assumes a first position in which the boom assembly as folded up is erected to a limit and pivoted to an extent where a side face of the bucket is located in front of the driver's section, and the pivotal point is located substantially over a forward end of the boom assembly holder when the boom assembly assumes a second position in which the boom assembly as folded up is at an intermediate pivoting position and erected to the limit with a back face of the bucket opposed to the driver's section.
Because of the above characterizing features of the excavator, the entire boom assembly is brought sufficiently close to the swivel axis of the upper carriage only by erecting to the limit the boom assembly including the bucket filled with earth and sand, whereby the locus circle is reduced for improved operability in a narrow site. Furthermore, where there is an object, such as a wall, laterally of the excavator which is obstructive to the swivelling but is lower than the pivotal point of the arm of the boom assembly in the erected position, the arm may be moved to a horizontal posture to permit the swivelling movement of the upper carriage. By so moving the arm, a space between the excavator and the obstacle required for the swivelling may be made smaller.
The swivel position of the upper carriage suited for traveling and the swivel position thereof for effecting digging work at a transversely mid-position are substantially the same, therefore the seat may be fixed to one position without entailing any inconvenience in the driver's control operation. Moreover, though the pivotal axis of the boom assembly is located in a front area of the upper carriage adjacent the transversely mid-position, the boomeran shape of the boom permits the entire boom assembly to be contained within transverse dimensions of the excavator when the boom assembly as folded up is erected to the limit and pivoted to the limit position in which a side face of the bucket is brought to a position in front of the driver's section.
In a preferred embodiment, the driver's section is made small by arranging the driver's seat adjacent the swivel axis of the upper carriage and arranging a bonnet covering the motor section immediately behind the seat. The driver's section, although small, is capable of adequate functions by virtue of implement operating levers disposed at opposite sides of the seat and inclined forwardly.
In a further preferred embodiment, a windshield is inclined to be substantially parallel to a lower half of the boom when the boom assembly is erected to the limit. This permits the entire boom assembly to further approach the swivel axis of the upper carriage.
Other features and advantages of the present invention will be apparent from the description of the preferred embodiment to follow.
Brief Description of the Drawings The drawings illustrate a complete swivel type backhoe vehicle embodying the present invention, in which: Fig. 1 is a front view showing a backhoe implement in an upstanding, maxium foldup position, Fig. 2 is a side view of the position shown in Fig. 1, Fig. 3 is a plan view of the position shown in Fig. 1, Fig. 4 is a plan view showing the backhoe implement in a forwardly turned position, and Fig. 5 is a side view of the position shown in Fig. 4.
Description of the Preferred Embodiment An excavator according to the present invention basically comprises a chassis 3 including a pair of right and left crawler traveling devices 1 and an earth-moving implement 2, and an upper carriage 5 carrying a boom assembly 4 and mounted on the chassis 3 for complete or 360 degree swivelling about an axis X.
The upper carriage 5 further carries a driver's section 6 on a forward portion and one lateral side thereof, a fuel tank 7 and a pressure oil tank 8 on the other lateral side, and a motor section 9 covered by a bonnet on a rear portion.
As is well known, the boom assembly 4 comprises a boom 10, an arm 11 and a bucket 12 pivotally connected in series and driven respectively by hydraulic cylinders 13 to flex and move up and down. The boom 10 is pivotally supported at a lower end thereof by a boom assembly holder 14 which in turn is supported by a bracket 15 at the front end of the upper carriage 5 to be pivotable on a vertical axis Y. The boom assembly holder 14 is driven to pivot by a hydraulic cylinder 16.
The vertical axis Y is located adjacent the center of the excavator as viewed from the front of the upper carriage 5. Through the pivoting movement of the boom assembly holder 14, the boom assembly 4 is movable between a position facing forwardly and a position approximately at right angles to the driver's section 6.
The boom 10 is angled to project or bend backward at a substantially mid-position of its length. The arm 11 is substantially equal in length to an upper half, namely a portion above the bending mid-position, of the boom 10. Fig. 1 shows a first position in which the boom assembly 4 is pivoted sideways about 90 degrees to be adjacent the driver's section, the boom 10 is erected to a limit, the arm 11 is flexed to a limit, and the bucket 12 is pivoted inwardly to a substantially horizontal posture.In this first position, as viewed from the front of the excavator, a pivotal point Z between the boom 10 and arm 11 is located on or adjacent the swivel axis X, the upper half of boom 10 and the arm 11 define the two legs of an equilateral triangle with the pivotal point Z between the boom 10 and arm 11 defining its vertex, and the bucket 12 has an extreme end thereof located sufficiently close to an inner side of the bend of the boom 10.
In this upstanding, maximum foldup position of the boom assembly 4, the front end of the driver,s section 6 protrudes into an area below the bucket 12. The upper carriage 5 has such a rear contour that, in the swivelling movement, follows a circle S described in plan view by an outer position A at a base or attachment end of the bucket 12 which constitutes an outermost part of the boom assembly 4 in the above-noted position. In other words, the circle S has a radius R corresponding to a minimum swivel radius of the upper carriage 5.
Figs. 5 and 6 show a second position of the boom assembly 4 in which the boom 10 is erected to the limit, the arm 11 is flexed to the limit, and the bucket 12 has its back face opposed to the driver's section 6. In this second position, the pivotal point Z is located substantially over a tip end of the holder 14 in side view of the excavator.
The driver's section 6 includes a driver's seat 17 disposed centrally thereof, implement operating levers 18 and 19 disposed laterally of the seat 17 which are angled forwardly, and crawler operating levers 20 disposed in front of the seat 17 for changing the right and left crawler devices 1 between forward drive and backward drive. The righthand implement operating lever 18 causes, by fore and aft rocking, the boom 10 to move up and down, and, by sideways rocking, the bucket 12 to pivot. The lefthand implement operating lever 19 causes, by fore and aft rocking, the arm 11 to flex, and, by sideways rocking, the upper carriage 5 to swivel. To catry out these functions, the implement operating levers 18 and 19 are operatively connected to control valves for the implement operating hydraulic cylinders 13 and a control valve for a hydraulic swivel motor.
The driver's section 6 includes a wire-mesh guard frame 21 extending vertically at the front end thereof and forwardly of the driver's feet, and a sunshade 22 covering an area over the driver's seat 17. A transparent plate 23 extends between a top end of the guard frame 21 and a forward end of the sunshade 22 to protect the driver from earth and sand sprinkling out of the bucket 12.

Claims (8)

1. An excavator comprising a chassis having right and left travelling means, an upper carriage swivellable 360O on the chassis and including a driver's section on a forward portion thereof and a motor section on a rear portion thereof, a boom assembly including a boom, a bucket arm, a bucket and a boom assembly holder attached to the upper carriage to be pivotable on a vertical axis, the vertical axis being located in a front portion of the upper carriage and adjacent a mid-position transversely of the excavator, the boom being angled adjacent a longitudinally midposition to have a boomerang shape, the bucket arm being substantially half the length of the boom, the boom and bucket arm having a pivotal point therebetween located substantially at the mid-position transversely of the excavator when the boom assembly assumes a first position in which, folded up, it is erected to a limit and pivoted to an extent where a side face of the bucket is located in front of the driver's section and the pivotal point being located substantially over a forward end of the boom assembly holder when the boom assembly assumes a second position in which, folded up, it is at an intermediate pivoting position and erected to the limit with a back face of the bucket opposed to the driver's section.
2. An excavator as claimed in claim 1, in which the first position intended for a travelling position and the second position intended for a main excavating position are achieved with one position of the upper carriage and in both positions the upper carriage and the boom assembly are substantially contained within lateral planes defined by the travelling means.
3. An excavator as claimed in claim 1 or 2, in which the driver's section includes a driver's seat located adjacent a swivel axis of the upper carriage.
4. An excavator as claimed in claim 1, 2 or 3, in which the motor section is covered by a bonnet directly behind the driver's seat.
5. An excavator as claimed in any of claim 1 to 4, in which the driver's section is surrounded by the bonnet, a fuel tank and a pressure oil tank being mounted laterally of the upper carriage, a sunshade and a guard frame extending vertically on a front portion of the upper carriage and a windshield extending between a top end of the guard frame and a forward end of the sunshade, the windshield being inclined to be substantially parallel to a lower half of the boom when the boom assembly is erected in the second position.
6. An excavator as claimed in any preceding claim, in which the driver's section includes implement operating levers disposed laterally of the driver's seat, the levers being inclined forwardly.
7. An excavator as claimed in any one of claims 1 to 6, in which the bucket in the first position is located in an upper region with respect to the driver's section to provide the driver with a forward field of vision below the bucket.
8. An excavator constructed and arranged to operate substantially as herein described with reference to and as illustrated in the accompanying drawings.
GB08619945A 1985-12-23 1986-08-15 Complete swivel type excavator Expired GB2184419B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60289815A JPS62148725A (en) 1985-12-23 1985-12-23 Full-slewing type back hoe working vehicle

Publications (3)

Publication Number Publication Date
GB8619945D0 GB8619945D0 (en) 1986-09-24
GB2184419A true GB2184419A (en) 1987-06-24
GB2184419B GB2184419B (en) 1988-12-07

Family

ID=17748127

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08619945A Expired GB2184419B (en) 1985-12-23 1986-08-15 Complete swivel type excavator

Country Status (6)

Country Link
JP (1) JPS62148725A (en)
KR (1) KR950008727B1 (en)
DE (1) DE3638423A1 (en)
FR (1) FR2592076B1 (en)
GB (1) GB2184419B (en)
NL (1) NL8602126A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0311082A1 (en) * 1987-10-09 1989-04-12 Hitachi Construction Machinery Co., Ltd. Full-turn type working machine
US5244337A (en) * 1990-02-05 1993-09-14 Dr. Ing. H.C.F. Porsche Ag Mobile shovel excavator
EP0807719A1 (en) * 1996-05-14 1997-11-19 KABUSHIKI KAISHA KOBE SEIKO SHO also known as Kobe Steel Ltd. Hydraulic working machine
EP0807720A1 (en) * 1996-05-14 1997-11-19 KABUSHIKI KAISHA KOBE SEIKO SHO also known as Kobe Steel Ltd. Hydraulic working machine
US6009643A (en) * 1996-05-14 2000-01-04 Kabushiki Kaisha Kobe Seiko Sho Hydraulic working machine
DE19843429C2 (en) * 1997-09-22 2001-03-15 Kubota Kk Work vehicle
EP1091049A2 (en) * 1999-10-07 2001-04-11 Kobleco Construction Machinery Co., Ltd. Hydraulic excavator

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4003325C2 (en) * 1990-02-05 1994-07-07 Porsche Ag Excavator
DE19749246A1 (en) * 1997-11-07 1999-05-27 Krupp Foerdertechnik Gmbh Bucket wheel excavator running on endless track
CN109339130B (en) * 2018-11-02 2023-11-10 徐州徐工矿业机械有限公司 Backhoe type excavator movable arm

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4256432A (en) * 1977-10-31 1981-03-17 Kubota, Ltd. Construction of circuit for working vehicle operable as backhoe and also as dozer
EP0131939A1 (en) * 1983-07-14 1985-01-23 Karl Schaeff GmbH &amp; Co. Mobile hydraulic excavator

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2558799C3 (en) * 1975-12-24 1981-11-05 Karl Schaeff GmbH & Co, Maschinenfabrik, 7183 Langenburg Mobile hydraulic backhoe
GB2015963A (en) * 1978-02-07 1979-09-19 Hymac Ltd Hydraulic excavator
FR2450913A1 (en) * 1979-03-08 1980-10-03 Takeuchi Manufacturing Cy Ltd Rotating, back-acting mechanical bucket digger - has horizontally rotatable bucket digger and scraper blade
JPS605739B2 (en) * 1981-08-27 1985-02-13 ハンド−ザ−工業株式会社 excavator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4256432A (en) * 1977-10-31 1981-03-17 Kubota, Ltd. Construction of circuit for working vehicle operable as backhoe and also as dozer
EP0131939A1 (en) * 1983-07-14 1985-01-23 Karl Schaeff GmbH &amp; Co. Mobile hydraulic excavator

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0311082A1 (en) * 1987-10-09 1989-04-12 Hitachi Construction Machinery Co., Ltd. Full-turn type working machine
US5244337A (en) * 1990-02-05 1993-09-14 Dr. Ing. H.C.F. Porsche Ag Mobile shovel excavator
EP0807719A1 (en) * 1996-05-14 1997-11-19 KABUSHIKI KAISHA KOBE SEIKO SHO also known as Kobe Steel Ltd. Hydraulic working machine
EP0807720A1 (en) * 1996-05-14 1997-11-19 KABUSHIKI KAISHA KOBE SEIKO SHO also known as Kobe Steel Ltd. Hydraulic working machine
US5711095A (en) * 1996-05-14 1998-01-27 Kabushiki Kaisha Kobe Seiko Sho Hydraulic working machine having a projecting portion
US5836411A (en) * 1996-05-14 1998-11-17 Kabushiki Kaisha Kobe Seiko Sho Hydraulic working machine
US6009643A (en) * 1996-05-14 2000-01-04 Kabushiki Kaisha Kobe Seiko Sho Hydraulic working machine
EP1118720A3 (en) * 1996-05-14 2002-03-27 Kabushiki Kaisha Kobe Seiko Sho Hydraulic working machine
DE19843429C2 (en) * 1997-09-22 2001-03-15 Kubota Kk Work vehicle
EP1091049A2 (en) * 1999-10-07 2001-04-11 Kobleco Construction Machinery Co., Ltd. Hydraulic excavator
EP1091049A3 (en) * 1999-10-07 2002-04-03 Kobleco Construction Machinery Co., Ltd. Hydraulic excavator

Also Published As

Publication number Publication date
GB2184419B (en) 1988-12-07
KR870006286A (en) 1987-07-10
NL8602126A (en) 1987-07-16
FR2592076B1 (en) 1992-04-03
KR950008727B1 (en) 1995-08-04
JPS62148725A (en) 1987-07-02
GB8619945D0 (en) 1986-09-24
FR2592076A1 (en) 1987-06-26
DE3638423A1 (en) 1987-07-02
JPH0428053B2 (en) 1992-05-13

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PCNP Patent ceased through non-payment of renewal fee

Effective date: 20050815