EP0450156A1 - Protection device for a hydraulic jack piston rod - Google Patents

Protection device for a hydraulic jack piston rod Download PDF

Info

Publication number
EP0450156A1
EP0450156A1 EP90122461A EP90122461A EP0450156A1 EP 0450156 A1 EP0450156 A1 EP 0450156A1 EP 90122461 A EP90122461 A EP 90122461A EP 90122461 A EP90122461 A EP 90122461A EP 0450156 A1 EP0450156 A1 EP 0450156A1
Authority
EP
European Patent Office
Prior art keywords
piston rod
hydraulic cylinder
protective sleeve
protective
cylinder
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
EP90122461A
Other languages
German (de)
French (fr)
Other versions
EP0450156B1 (en
Inventor
Mario Rieger
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.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche AG
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 Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Publication of EP0450156A1 publication Critical patent/EP0450156A1/en
Application granted granted Critical
Publication of EP0450156B1 publication Critical patent/EP0450156B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • 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
    • E02F9/24—Safety devices, e.g. for preventing overload
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices

Definitions

  • the invention relates to a protective device according to the preamble of claim 1.
  • a protective device for a hydraulic cylinder of a work vehicle which includes a piston rod cover which can be displaced accordingly with the work movements of the hydraulic cylinder or the inward and outward movements of the piston rod.
  • a guide on the cylinder housing for displacement takes place via a flat guide on both sides of the cover designed as a half-shell.
  • Such a guided sliding cover is subject to a relatively high susceptibility to malfunction due to the robust operation of work vehicles, since even slight deformations of the cover due to external influences can lead to jamming and thus a function of the hydraulic cylinder is no longer fully guaranteed.
  • the object of the invention is to provide an improved protective device for a piston rod of a hydraulic cylinder, which is robust and ensures protection even after exposure to external influences.
  • the main advantages achieved by the invention are that the shell-like protective sleeve is guided on a slide ring of the cylinder housing and special flat guides according to DE-A 37 31 734 can be omitted, so that even if the protective sleeve is deformed, there is no impediment to the function of the hydraulic cylinder .
  • the slide ring is preferably made of elastic plastic and is held on the cylinder housing by means of a tensioning band and is therefore easy to assemble and replace.
  • the protective sleeve can be freely moved on the slide ring according to the working movements of the hydraulic cylinder. It is not subject to any particular tolerance, so that if the sleeve is damaged, the hydraulic cylinder is impaired and a protective function is guaranteed.
  • the protective device 1 for a hydraulic cylinder 2 essentially comprises a shell-like protective sleeve 4 partially covering the piston rod 3 of the hydraulic cylinder.
  • the hydraulic cylinder 2 is articulated with its one bearing eye 5 on the vehicle body 6 and its rod bearing eye 7 on a shield 8 or the like .
  • the shell-like protective sleeve 4 is firmly connected to a holder 9, which in turn is pivotable between legs 10 of the bearing eye 7 about a horizontal axis 11.
  • the protective sleeve 4 encloses an area of the cylinder housing 12 and the piston rod 3 exposed during working movements. It is mainly protected from above, i.e. against external influences acting in the direction of the arrow 14.
  • This slide ring 15 is made of elastic plastic and is clamped to the housing 12 by means of a tensioning band 16, as shown in FIG. 3.
  • the sliding ring 15 has tangential bevels 17 on its circumference, which are designed to make the ring 15 flexible and to reduce the friction between the protective sleeve 4 and the sliding ring 15.
  • the shell-like protective sleeve 4 has a continuous slot 19 in the lower region 18, which forms a free space for the screw 20 of the tensioning strap 16 and for a pressure line 21 of the hydraulic cylinder 2.
  • the protective sleeve 4 slides on the slide ring 15 and holds the sensitive surface of the piston rod 3 against objects falling from above in the arrow direction 14, such as e.g. Stones and the like are protected over the entire work area.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Actuator (AREA)
  • Fluid-Damping Devices (AREA)
  • Component Parts Of Construction Machinery (AREA)

Abstract

A protective arrangement is described for a piston rod of an excavator hydraulic cylinder is arranged between a vehicle frame and a scraper blade to serve as a working cylinder for lifting and lowering. For protecting the exposed piston rod, a shell-type protective sleeve is supported by way of a stationary slide ring while resting on the latter, and encloses the piston rod from above in a protective manner during the working operation.

Description

Die Erfindung bezieht sich auf eine Schutzvorrichtung nach dem Obergriff des Anspruchs 1.The invention relates to a protective device according to the preamble of claim 1.

Aus der DE-A 37 31 734 ist eine Schutzvorrichtung für einen Hydraulikzylinder eines Arbeitsfahrzeuges bekannt, die eine Kolbenstangenabdeckung unfaßt, welche entsprechend der Arbeitsbewegungen des Hydraulikzylinders bzw. der Ein- und Ausfahrbewegungen der Kolbenstange, mit dieser entsprechend verschiebbar ist. Eine Führung am Zylindergehäuse zum Verschieben erfolgt über eine Flachführung an beiden Seiten der als Halbschale ausgeführten Abdeckung. Eine solche geführte verschiebbare Abdeckung ist aufgrund des robusten Betriebs von Arbeitsfahrzeugen einer relativ großen Störanfälligkeit unterworfen, da schon geringe Verformungen der Abdeckung durch äußere Einflüsse zu einem Verklemmen führen können und damit eine Funktion des Hydraulikzylinders nicht mehr voll gewährleistet ist.From DE-A 37 31 734 a protective device for a hydraulic cylinder of a work vehicle is known, which includes a piston rod cover which can be displaced accordingly with the work movements of the hydraulic cylinder or the inward and outward movements of the piston rod. A guide on the cylinder housing for displacement takes place via a flat guide on both sides of the cover designed as a half-shell. Such a guided sliding cover is subject to a relatively high susceptibility to malfunction due to the robust operation of work vehicles, since even slight deformations of the cover due to external influences can lead to jamming and thus a function of the hydraulic cylinder is no longer fully guaranteed.

Aufgabe der Erfindung ist es, eine verbesserte Schutzvorrichtung für eine Kolbenstange eines Hydraulikzylinders zu schaffen, die robust ausgeführt ist und einen Schutz auch nach Einwirkung von äußeren Einflüssen gewährleistet.The object of the invention is to provide an improved protective device for a piston rod of a hydraulic cylinder, which is robust and ensures protection even after exposure to external influences.

Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Anspruches 1 gelöst. Weitere vorteilhafte Merkmale beinhalten die Unteransprüche.This object is achieved by the characterizing features of claim 1. The dependent claims contain further advantageous features.

Die mit der Erfindung hauptsächlich erzielten Vorteile bestehen darin, daß die schalenartige Schutzhülse auf einem Gleitring des Zylindergehäuses geführt ist und spezielle Flachführungen gemäß der DE-A 37 31 734 entfallen können, so daß auch bei einer Verformung der Schutzhülse keine Behinderung der Funktion des Hydraulikzylinders erfolgt. Der Gleitring ist vorzugsweise elastisch in Kunststoff ausgeführt und wird über ein Spannband am Zylindergehäuse gehalten und ist somit in einfacher Weise montier- und auswechselbar.The main advantages achieved by the invention are that the shell-like protective sleeve is guided on a slide ring of the cylinder housing and special flat guides according to DE-A 37 31 734 can be omitted, so that even if the protective sleeve is deformed, there is no impediment to the function of the hydraulic cylinder . The slide ring is preferably made of elastic plastic and is held on the cylinder housing by means of a tensioning band and is therefore easy to assemble and replace.

Die Schutzhülse ist entsprechend der Arbeitsbewegungen des Hydraulikzylinders auf dem Gleitring frei verschiebbar. Sie unterliegt keiner besonderen Toleranz, so daß bei einer Beschädigung der Hülse eine Beeinträchtigung des Hydraulikzylinders und eine Schutzfunktion gewährleistet bleibt.The protective sleeve can be freely moved on the slide ring according to the working movements of the hydraulic cylinder. It is not subject to any particular tolerance, so that if the sleeve is damaged, the hydraulic cylinder is impaired and a protective function is guaranteed.

Eine Ausführung der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben.An embodiment of the invention is shown in the drawing and will be described in more detail below.

Es zeigen

Fig.1
eine Seitenansicht eines Hydraulikzylinders mit schalenartiger Schutzhülse,
Fig.2
eine Ansicht in Pfeilrichtung X auf einen am Zylindergehäuse gehaltenen Gleitring gesehen und
Fig.3
einen Schnitt nach der Linie III-III der Fig.1.
Show it
Fig. 1
a side view of a hydraulic cylinder with a shell-like protective sleeve,
Fig. 2
seen a view in the direction of arrow X on a slide ring held on the cylinder housing and
Fig. 3
a section along the line III-III of Fig.1.

Die Schutzvorrichtung 1 für einen Hydraulikzylinder 2 umfaßt im wesentlichen ein die Kolbenstange 3 des Hydraulikzylinders teilweise abdeckende schalenartige Schutzhülse 4. Der Hydraulikzylinder 2 ist mit seinem einen gehäuseseitigen Lagerauge 5 am Fahrzeugaufbau 6 und mit seinem stangenseitigen Lagerauge 7 an einem Schild 8 oder dergleichen Arbeitsgerät gelenkig befestigt.The protective device 1 for a hydraulic cylinder 2 essentially comprises a shell-like protective sleeve 4 partially covering the piston rod 3 of the hydraulic cylinder. The hydraulic cylinder 2 is articulated with its one bearing eye 5 on the vehicle body 6 and its rod bearing eye 7 on a shield 8 or the like .

Die schalenartige Schutzhülse 4 ist mit einem Halter 9 fest verbunden, der wiederum zwischen Schenkeln 10 des Lagerauges 7 um eine horzontale Achse 11 schwenkbar ist.The shell-like protective sleeve 4 is firmly connected to a holder 9, which in turn is pivotable between legs 10 of the bearing eye 7 about a horizontal axis 11.

Die Schutzhülse 4 umschließt einen Bereich des Zylindergehäuses 12 sowie die bei Arbeitsbewegungen freiliegende Kolbenstange 3. Sie wird hauptsächlich von oben geschützt, d.h. gegen in Pfeilrichtung 14 wirkende äußere Einflüsse.The protective sleeve 4 encloses an area of the cylinder housing 12 and the piston rod 3 exposed during working movements. It is mainly protected from above, i.e. against external influences acting in the direction of the arrow 14.

Zur gleitenden Abstützung der Schutzhülse 4 ist sie auf einem Gleitring 15 des Zylindergehäuses 12 geführt. Dieser Gleitring 15 besteht aus elastischem Kunststoff und wird über ein Spannband 16 am Gehäuse 12 festgespannt, wie Fig.3 näher zeigt.For the sliding support of the protective sleeve 4, it is guided on a slide ring 15 of the cylinder housing 12. This slide ring 15 is made of elastic plastic and is clamped to the housing 12 by means of a tensioning band 16, as shown in FIG. 3.

Der Gleitring 15 weist an seinem Umfang tangentiale Abschrägungen 17 auf, die den Ring 15 flexibel gestalten und die Reibung zwischen der Schutzhülse 4 und dem Gleitring 15 vermindern sollen.The sliding ring 15 has tangential bevels 17 on its circumference, which are designed to make the ring 15 flexible and to reduce the friction between the protective sleeve 4 and the sliding ring 15.

Die schalenartige Schutzhülse 4 weist im unteren Bereich 18 einen durchgehenden Schlitz 19 auf, der einen Freiraum für die Schraube 20 des Spannbandes 16 sowie für eine Druckleitung 21 des Hydraulikzylinders 2 bildet.The shell-like protective sleeve 4 has a continuous slot 19 in the lower region 18, which forms a free space for the screw 20 of the tensioning strap 16 and for a pressure line 21 of the hydraulic cylinder 2.

Bei einem Aus- und Einfahren der Kolbenstange 3 in die Pfeilrichtungen 22 und 23 gleitet die Schutzhülse 4 auf dem Gleitring 15 und hält die empfindliche Oberfläche der Kolbenstange 3 gegen von oben in Pfeilrichtung 14 fallende Gegenstände, wie z.B. Steine und dergleichen über den gesamten Arbeitsbereich geschützt.When the piston rod 3 is extended and retracted in the arrow directions 22 and 23, the protective sleeve 4 slides on the slide ring 15 and holds the sensitive surface of the piston rod 3 against objects falling from above in the arrow direction 14, such as e.g. Stones and the like are protected over the entire work area.

Claims (5)

Schutzvorrichtung für eine Kolbenstange eines Hydraulikzylinders an einem Bagger, insbesondere für einen Hydraulikzylinder der zwischen einem Fahrzeugrahmen und einem Planierschild als Arbeitszylinder zum Heben und Senken angeordnet ist, dadurch gekennzeichnet, daß die Vorrichtung (1) eine am Anlenkauge (7) einer Kolbenstange (3) eines Hydraulikzylinders (2) befestigte schalenartige Schutzhülse (4) umfaßt, die am Zylindergehäuse (12) über einen feststehenden Gleitring (15) aufliegend abgestützt ist und die freiliegende Kolbenstange (3) teilweise von oben schützend umschließt.Protective device for a piston rod of a hydraulic cylinder on an excavator, in particular for a hydraulic cylinder which is arranged between a vehicle frame and a dozer blade as a working cylinder for lifting and lowering, characterized in that the device (1) has a connecting rod (7) on a piston rod (3) A hydraulic cylinder (2) has a shell-like protective sleeve (4) attached to it, which is supported on the cylinder housing (12) by a fixed slide ring (15) and partially encloses the exposed piston rod (3) in a protective manner from above. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Schutzhülse (4) mit einem Halter (9) fest verbunden ist, der am kolbenstangenseitigen Anlenkauge (7) zwischen Schenkeln (10) schwenkbar um eine horizontale Achse (11) angelenkt ist.Apparatus according to claim 1, characterized in that the protective sleeve (4) is fixedly connected to a holder (9) which is articulated on the piston rod-side pivot eye (7) between legs (10) about a horizontal axis (11). Vorrichtung nach den Ansprüchen 1 oder 2, dadurch gekennzeichnet, daß die Schutzhülse (4) aus einem das Zylindergehäuse (12) teilweise mit umgebenden Rohrelement besteht, welches im unteren Bereich (18) einen durchgehenden einen Freiraum bildenden Längsschlitz (19) aufweist.Device according to claims 1 or 2, characterized in that the protective sleeve (4) consists of a tubular element which partially surrounds the cylinder housing (12) and which has a continuous longitudinal slot (19) forming a free space in the lower region (18). Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Gleitring (15) aus einem Kunststoff besteht und über ein Spannband (16) am Zylindergehäuse (12) festgesetzt ist.Device according to one or more of the preceding claims, characterized in that the sliding ring (15) consists of a plastic and is fixed to the cylinder housing (12) by means of a tensioning band (16). Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Gleitring (15) über den Umfang verteilte tangentiale Abschrägungen (17) aufweist, die eine geringere Wanddicke (d) aufweisen als die übrige Wandung des Ringes (15).Device according to one or more of the preceding claims, characterized in that the sliding ring (15) has tangential bevels (17) which are distributed over the circumference and have a smaller wall thickness (d) than the remaining wall of the ring (15).
EP90122461A 1990-03-30 1990-11-26 Protection device for a hydraulic jack piston rod Expired - Lifetime EP0450156B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4010225A DE4010225A1 (en) 1990-03-30 1990-03-30 PROTECTIVE DEVICE FOR A PISTON ROD OF A HYDRAULIC CYLINDER
DE4010225 1990-03-30

Publications (2)

Publication Number Publication Date
EP0450156A1 true EP0450156A1 (en) 1991-10-09
EP0450156B1 EP0450156B1 (en) 1996-03-27

Family

ID=6403399

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90122461A Expired - Lifetime EP0450156B1 (en) 1990-03-30 1990-11-26 Protection device for a hydraulic jack piston rod

Country Status (6)

Country Link
US (1) US5152351A (en)
EP (1) EP0450156B1 (en)
JP (1) JPH04222725A (en)
AT (1) ATE136082T1 (en)
DE (2) DE4010225A1 (en)
NO (1) NO175649C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2514297A1 (en) * 2011-04-19 2012-10-24 CLAAS Selbstfahrende Erntemaschinen GmbH Self-propelled harvester
EP2933388A1 (en) * 2014-04-18 2015-10-21 Caterpillar Work Tools B. V. Hydraulic cylinder cover

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5386652A (en) * 1993-11-12 1995-02-07 Allied Gator, Inc. Cylinder guard
US5383563A (en) * 1994-02-10 1995-01-24 Caterpillar Inc. Outrigger and guard assembly
US6843005B2 (en) * 2002-11-14 2005-01-18 Rockland, Inc. Grappling attachment for excavating machines and the like
US6659194B1 (en) * 2002-11-22 2003-12-09 Samuel C. Thompson Blade angle adjustment system
ITRM20030438A1 (en) * 2003-09-24 2005-03-25 Jolly Drive S R L PROTECTION DEVICE FROM MARINE VEGETATION
KR100723579B1 (en) * 2004-05-04 2007-05-31 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 Cylinder protective apparatus for preventing strange noise
DE102004030289A1 (en) * 2004-06-23 2006-01-12 Ina-Schaeffler Kg Protective element for a preassembled unit, in particular for a clamping device of a belt meander drive
JP4038197B2 (en) * 2004-07-01 2008-01-23 ヤンマー株式会社 Cylinder protection device
US7681657B2 (en) * 2004-12-09 2010-03-23 Deere & Company Debris guard
US7594466B2 (en) * 2007-01-12 2009-09-29 Rotobec Inc. Actuator with a protective sleeve for a piston
JP4759690B2 (en) * 2008-01-29 2011-08-31 ヤンマー建機株式会社 Swivel work vehicle
JP2009215698A (en) * 2008-03-06 2009-09-24 Yanmar Co Ltd Earth removal device of work vehicle
CA2748550A1 (en) 2009-01-28 2010-08-05 Deere & Company Bucket cylinder debris guard
AU2012388831B2 (en) * 2012-08-27 2017-10-12 Komatsu Forest Ab Method and protective arrangement for linear control and actuator means that are components of a tree harvester of a forestry machine
CN104454776A (en) * 2014-11-25 2015-03-25 无锡市晶瑜冶金机械有限公司 Installation structure of horizontal moving oil cylinder in stepping furnace
CN104696313B (en) * 2015-03-13 2017-03-22 山东钢铁股份有限公司 Water film device of protective hydraulic cylinder and protection method thereof
CN106560565B (en) * 2016-01-08 2019-01-25 徐工集团工程机械股份有限公司 Underground carry scraper safety protection control method, device and system
CN108487364B (en) * 2018-03-13 2020-07-21 柳州柳工挖掘机有限公司 Oil cylinder protection mechanism of excavator bucket
CA3155250A1 (en) * 2019-10-25 2021-04-29 Robert Ray A hydraulic cylinder piston rod protection system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB770866A (en) * 1954-07-01 1957-03-27 John Raymond Austin Sr A guard for a piston rod of a piston and cylinder actuator
DE1601715A1 (en) * 1968-03-09 1970-08-13 Rolf Dohrendorf Hydraulic equipment, in particular for driving construction machines
US3997986A (en) * 1975-10-09 1976-12-21 Caterpillar Tractor Co. Guard for hydraulic cylinder rods
EP0048362A2 (en) * 1980-09-24 1982-03-31 Josef Martin Feuerungsbau GmbH Protection device for piston rods or rams, especially for use in combustion apparatuses
DE3731734A1 (en) * 1987-09-21 1989-04-06 Fritz Hildebrandt Machine with hydraulic cylinder
DE3803964A1 (en) * 1988-02-10 1989-08-24 Festo Kg PROTECTIVE DEVICE

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB189713587A (en) * 1897-06-02 1897-09-25 Adolph Proschinsky Improvements in Air Pumps for Bicycles.
US2730823A (en) * 1951-07-30 1956-01-17 John F Cassidy Bulldozer blade
US2983059A (en) * 1957-04-29 1961-05-09 Deere & Co Hydraulic motor assembly
GB1415257A (en) * 1973-01-19 1975-11-26 Girling Ltd Gas springs
US3982648A (en) * 1975-11-10 1976-09-28 International Harvester Company Lift arm safety bar
US4074769A (en) * 1976-04-28 1978-02-21 J. I. Case Company Bulldozer blade control

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB770866A (en) * 1954-07-01 1957-03-27 John Raymond Austin Sr A guard for a piston rod of a piston and cylinder actuator
DE1601715A1 (en) * 1968-03-09 1970-08-13 Rolf Dohrendorf Hydraulic equipment, in particular for driving construction machines
US3997986A (en) * 1975-10-09 1976-12-21 Caterpillar Tractor Co. Guard for hydraulic cylinder rods
EP0048362A2 (en) * 1980-09-24 1982-03-31 Josef Martin Feuerungsbau GmbH Protection device for piston rods or rams, especially for use in combustion apparatuses
DE3731734A1 (en) * 1987-09-21 1989-04-06 Fritz Hildebrandt Machine with hydraulic cylinder
DE3803964A1 (en) * 1988-02-10 1989-08-24 Festo Kg PROTECTIVE DEVICE

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2514297A1 (en) * 2011-04-19 2012-10-24 CLAAS Selbstfahrende Erntemaschinen GmbH Self-propelled harvester
DE102011002158A1 (en) 2011-04-19 2012-10-25 Claas Selbstfahrende Erntemaschinen Gmbh Self-propelled harvester
EP2933388A1 (en) * 2014-04-18 2015-10-21 Caterpillar Work Tools B. V. Hydraulic cylinder cover
WO2015158546A1 (en) * 2014-04-18 2015-10-22 Caterpillar Work Tools B.V. Hydraulic cylinder cover
CN106164500A (en) * 2014-04-18 2016-11-23 卡特彼勒作业机具有限公司 Hydraulic cylinder
US10415608B2 (en) 2014-04-18 2019-09-17 Caterpillar Work Tools B.V. Hydraulic cylinder cover
CN106164500B (en) * 2014-04-18 2021-09-24 卡特彼勒作业机具有限公司 Hydraulic cylinder cover

Also Published As

Publication number Publication date
NO911267L (en) 1991-10-01
DE4010225A1 (en) 1991-10-02
NO911267D0 (en) 1991-03-27
US5152351A (en) 1992-10-06
ATE136082T1 (en) 1996-04-15
DE59010249D1 (en) 1996-05-02
DE4010225C2 (en) 1993-04-15
EP0450156B1 (en) 1996-03-27
NO175649C (en) 1994-11-09
NO175649B (en) 1994-08-01
JPH04222725A (en) 1992-08-12

Similar Documents

Publication Publication Date Title
DE4010225C2 (en)
DE19528358C2 (en) Brush cutter
EP1842823B1 (en) Two-part telescopic arm of a crane
DE102009037516A1 (en) Device for guiding supply lines along structure of articulated robot, has linearly movable guiding element guided between plates in linearly slid manner, where guiding element guides hose and/or link chain in linearly movable manner
DE2620112B2 (en) Awning with a fabric tube in an awning box
EP1001247B1 (en) Position indicator for measuring the setting stroke way of the roll of a rolling frame
DE2503130C3 (en) Roller distance measuring device
DE3400148C1 (en) Windscreen wiper system, in particular controllable one-arm windscreen wiper system for motor vehicles
DE1228950B (en) Device for opening and closing sliding roofs for vehicles, in particular motor vehicles
DE2753955C2 (en) Articulated arm awning
DE944660C (en) Deflection device for window gear
DE2841420A1 (en) REMOTE CONTROL DEVICE
DE2831320C3 (en)
DE102004021895B4 (en) Towing hitch for a vehicle
DE102018100179B4 (en) Articulated arm awning with push rod
DE1296891B (en) Bellows
DE9410656U1 (en) Jumping fitting
DE2927065A1 (en) SUPPORT PLATE AND REMOVAL UNIT WITH SUPPORT PLATE
DE2731252A1 (en) Lathe guard assembly unit - has cowl with front and rear walls and top moving vertically and pivoting
DE3136761A1 (en) Conveying device for bottles and similar containers covered by a one-piece or multi-part hood
AT215853B (en) Lifting device for the sash of windows, doors or the like.
DE3421380C2 (en)
DE1160595B (en) Protection device for hydraulic presses of crane vehicles
DE9213969U1 (en) Bicycle frame
DE1086036B (en) Circular saw

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT DE GB SE

17P Request for examination filed

Effective date: 19911112

17Q First examination report despatched

Effective date: 19921217

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE GB SE

REF Corresponds to:

Ref document number: 136082

Country of ref document: AT

Date of ref document: 19960415

Kind code of ref document: T

REF Corresponds to:

Ref document number: 59010249

Country of ref document: DE

Date of ref document: 19960502

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19960501

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19981109

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19981118

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19981127

Year of fee payment: 9

Ref country code: DE

Payment date: 19981127

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991126

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991126

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991127

EUG Se: european patent has lapsed

Ref document number: 90122461.8

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19991126

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000901