EP0033165A2 - Supporting arm for mobile constructions - Google Patents

Supporting arm for mobile constructions Download PDF

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Publication number
EP0033165A2
EP0033165A2 EP81100669A EP81100669A EP0033165A2 EP 0033165 A2 EP0033165 A2 EP 0033165A2 EP 81100669 A EP81100669 A EP 81100669A EP 81100669 A EP81100669 A EP 81100669A EP 0033165 A2 EP0033165 A2 EP 0033165A2
Authority
EP
European Patent Office
Prior art keywords
foot
support arm
movement mechanism
raised
spring
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.)
Ceased
Application number
EP81100669A
Other languages
German (de)
French (fr)
Other versions
EP0033165A3 (en
Inventor
Mogens Falck Schmidt
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.)
FALCK SCHMIDT SHIPPING APS
Original Assignee
FALCK SCHMIDT SHIPPING APS
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8092673&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0033165(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by FALCK SCHMIDT SHIPPING APS filed Critical FALCK SCHMIDT SHIPPING APS
Publication of EP0033165A2 publication Critical patent/EP0033165A2/en
Publication of EP0033165A3 publication Critical patent/EP0033165A3/en
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
    • B66F17/006—Safety devices, e.g. for limiting or indicating lifting force for working platforms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/72—Counterweights or supports for balancing lifting couples
    • B66C23/78—Supports, e.g. outriggers, for mobile cranes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/88—Safety gear
    • B66C23/90—Devices for indicating or limiting lifting moment

Definitions

  • the invention relates to a support arm for movable structures according to the preamble of the claim.
  • the invention has for its object to provide such support arms in which an automatic display takes place; when the stability of the construction is reduced to a predetermined value.
  • the movement mechanism has a movement space between a position in which the foot is raised and another position in which it is lowered, and in that a spring pushes the movement mechanism into the position in which the foot is raised, an alarm switch being actuated.
  • a reduced load triggers the actuation of an alarm switch when it has reached a point in which the movable construction no longer rests on the support arm in the desired manner.
  • the permissible extent of the load reduction before triggering can be adjusted via the spring force.
  • FIG. 1 shows, partly in section, part of a movable structure with a support arm according to the invention.
  • a support arm is suspended from the construction to be supported in such a way that a foot 1 provided at the free end of the arm can be raised and lowered in relation to the contact surface.
  • the foot 1 is thus pivotably suspended in the supporting arm to allow the contact surface of the foot rests irrespective of the inclination of the support surface and / or of the supporting arm against the support surface.
  • the support arm is suspended in a part 2 of the movable structure in such a way that it can be pivoted up and down by means of a movement mechanism 3 which engages between the structure and the support arm until the foot 1 presses against the bearing surface.
  • the movement mechanism 3 shown in the present case as a cylinder-piston mechanism, has a movement space at one of its engagement points - in the embodiment shown in the engagement point on the support arm - the end 5 of the piston rod being axially along a slot formed in a projection provided on the support arm 4 is displaceable.
  • the end 5 of the piston rod bears against a contact arm 6 which is biased by a spring.
  • a spring 8 - in the present case a number of disc springs - is compressed between a sleeve provided on the contact arm and a stop 7 in the projection of the support arm such that the contact arm 6 is pressed against the piston rod.
  • the spring 8 then strives to hold the end of the piston rod 5 at the end of the slot 4, as shown in the figure.
  • the pressure exerted by the support arm against the bearing surface has a given value for all support arms of the structure. If this pressure changes with a or several support arms reduced, this is a sign that the movable structure is no longer stable.
  • the spring 8 When the holding pressure for the support arm shown drops to a set value determined by the spring 8, the spring 8 tries to push the foot further down against the bearing surface, causing the projection of the support arm with the slot 4 to be in proportion to move the end 5 of the piston rod so that the contact arm 6 no longer presses against the electrical switch 9.
  • the switch 9 therefore emits a signal which warns the operator of the movable structure and / or possibly prevents further movement of the structure.
  • the arrangement of the alarm contact shown can of course be changed.
  • the contact arm can e.g. instead of the axially displaceable piston rod shown, a rocker arm.
  • the essential feature of the invention is that the movement mechanism 3 has a movement space in the lowering direction of the foot against a corresponding spring force, and that the displacements of the movement mechanism in this movement space are controlled in a suitable manner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Structural Engineering (AREA)
  • Handcart (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Fertilizers (AREA)
  • Compounds Of Unknown Constitution (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Emergency Alarm Devices (AREA)

Abstract

Stützarm für bewegliche Konstructionen wie Personenhebevorrichtungen mit Arbeitsbühne oder bewegliche Kräne, wobei der Stützarm eine Fuß (1) besitzt, der mittels eines zwischen die Konstruktion (2) und den Stützarm eingesetzten Bewegungsmechanismus (3) im Verhältnis zur Auflagerfläche anhebbar und absenkbar ist. Dadurch, daß der Bewegungsmechanismus (3) einen Bewegungsraum (4) zwischen einer Stellung besitzt, in welcher der Fuß (1) angehoben ist, und einer anderen Stellung, in welcher der Fuß abgesenkt ist, und daß eine Feder (8) den Bewegungsmechanismus (3) in eine Stellung drückt, in welcher der Fuß (1) angehoben ist, wodurch ein Alarmschalter (9) auslösbar ist, erfolgt eine automatische Anzeige, falls die Stabilität der Konstruktion abnimmt. Das zulässige Ausmaß der Lastreduzierung am Stützarm bis zur Auslösung kann über die angelegte Federkraft eingestellt werden.Support arm for movable constructions such as personal lifting devices with work platforms or movable cranes, the support arm having a foot (1) which can be raised and lowered in relation to the support surface by means of a movement mechanism (3) inserted between the construction (2) and the support arm. Characterized in that the movement mechanism (3) has a movement space (4) between a position in which the foot (1) is raised and another position in which the foot is lowered, and in that a spring (8) the movement mechanism ( 3) presses into a position in which the foot (1) is raised, whereby an alarm switch (9) can be triggered, an automatic display takes place if the stability of the construction decreases. The permissible extent of the load reduction on the support arm until it triggers can be set using the spring force applied.

Description

Die Erfindung betrifft einen Stützarm für bewegliche Konstruktionen nach dem Oberbegriff des Anspruchs.The invention relates to a support arm for movable structures according to the preamble of the claim.

Es ist bekannt, die Stabilität von beweglichen Konstruktionen während des Betriebs durch Stützarme zu erhöhen, deren Füße gegen die Auflagefläche weiter von der Schwerpunktachse entfernt als die üblichen Auflagepunkte einer solchen Vorrichtung, z.B. die Laufräder, angesetzt werden. Mit Hilfe solcher Stützarme ist es auch möglich, eine bewegliche Konstruktion der genannten Art auf einer unebenen oder geneigten Auflagefläche aufzustellen.It is known to increase the stability of moving structures during operation by means of support arms, the feet of which are further away from the center of gravity against the support surface than the usual support points of such a device, e.g. the impellers. With the help of such support arms, it is also possible to set up a movable construction of the type mentioned on an uneven or inclined support surface.

Der Erfindung liegt die Aufgabe zugrunde, derartige Stützarme zu schaffen, bei denen eine automatische Anzeige erfolgt; wenn die Stabilität der Konstruktion auf einen vorbestimmten Wert reduziert ist.The invention has for its object to provide such support arms in which an automatic display takes place; when the stability of the construction is reduced to a predetermined value.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Bewegungsmechanismus einen Bewegungsraum zwischen einer Stellung besitzt, in welcher der Fuß angehoben ist, und einer anderen Stellung, in der er abgesenkt ist, und daß eine Feder den Bewegungsmechanismus in die Stellung drückt, in welcher der Fuß angehoben ist, wobei ein Alarmschalter betätigt wird.This object is achieved in that the movement mechanism has a movement space between a position in which the foot is raised and another position in which it is lowered, and in that a spring pushes the movement mechanism into the position in which the foot is raised, an alarm switch being actuated.

Mit dieser Ausführungsform kann erreicht werden, daß eine reduzierte Belastung die Betätigung eines Alarmschalters auslöst, wenn diese einen Punkt erreicht hat, in dem die bewegliche Konstruktion nicht mehr in der gewünschten Weise auf dem Stützarm ruht. Das zulässige Ausmaß der Lastreduzierung vor dem Auslösen ist über die Federkraft einstellbar.With this embodiment it can be achieved that a reduced load triggers the actuation of an alarm switch when it has reached a point in which the movable construction no longer rests on the support arm in the desired manner. The permissible extent of the load reduction before triggering can be adjusted via the spring force.

Anhand der Figur wird ein Ausführungsbeispiel der Erfindung näher erläuter. Die Figur zeigt, teilweise im Schnitt, einen Teil einer beweglichen Konstruktion mit einem Stützarm gemäß der Erfindung.An embodiment of the invention is explained in more detail with reference to the figure. The figure shows, partly in section, part of a movable structure with a support arm according to the invention.

Wie aus der Figur ersichtlich, ist ein Stützarm dergestalt an der abzustützenden Konstruktion aufgehängt, daß ein am freien Ende des Armes vorgesehener Fuß 1 im Verhältnis zur Auflagefläche angehoben und abgesenkt werden kann. Der Fuß 1 ist somit im Stützarm schwenkbar aufgehängt, um zu ermöglichen, daß die Berührungsfläche des Fußes unabhängig von der Neigung der Aufla- gefläche und/oder des Stützarmes gegen die Auflagefläche anliegt.As can be seen from the figure, a support arm is suspended from the construction to be supported in such a way that a foot 1 provided at the free end of the arm can be raised and lowered in relation to the contact surface. The foot 1 is thus pivotably suspended in the supporting arm to allow the contact surface of the foot rests irrespective of the inclination of the support surface and / or of the supporting arm against the support surface.

Der Stützarm ist in einem Teil 2 der beweglichen Konstruktion dergestalt aufgehängt, daß er mittels eines Bewegungsmechanismus 3, der zwischen der Konstruktion und dem Stützarm angreift, nach oben und unten geschwenkt werden kann, bis der Fuß 1 gegen die Auflagefläche drückt.The support arm is suspended in a part 2 of the movable structure in such a way that it can be pivoted up and down by means of a movement mechanism 3 which engages between the structure and the support arm until the foot 1 presses against the bearing surface.

Der Bewegungsmechanismus 3, im vorliegenden Fall als Zylinder-Kolben-Mechanismus dargestellt, besitzt an einem seiner Angriffspunkte - bei der dargestellten Ausführungsform im Angriffspunkt am Stützarm - einen Bewegungsraum, wobei das Ende 5 der Kolbenstange axial längs eines in einem am Stützarm vorgesehenen Vorsprung ausgebildeten Schlitzes 4 verschiebbar ist. Das Ende 5 der Kolbenstange liegt gegen einen durch eine Feder vorgespannten Kontaktarm 6 an. Eine Feder 8 - im vorliegenden Fall eine Zahl von Tellerfedern - ist zwischen einer am Kontaktarm vorgesehenen Manschette und einem Anschlag 7 im Vorsprung des Stützarms dergestalt zusammengedrückt, daß der Kontaktarm 6 gegen die Kolbenstange gepreßt wird. Die Feder 8 strebt dann danach, das Ende der Kolbenstange 5 an dem Ende des Schlitzes 4 zu halten, wie in der Figur dargestellt.The movement mechanism 3, shown in the present case as a cylinder-piston mechanism, has a movement space at one of its engagement points - in the embodiment shown in the engagement point on the support arm - the end 5 of the piston rod being axially along a slot formed in a projection provided on the support arm 4 is displaceable. The end 5 of the piston rod bears against a contact arm 6 which is biased by a spring. A spring 8 - in the present case a number of disc springs - is compressed between a sleeve provided on the contact arm and a stop 7 in the projection of the support arm such that the contact arm 6 is pressed against the piston rod. The spring 8 then strives to hold the end of the piston rod 5 at the end of the slot 4, as shown in the figure.

Wenn der Bewegungsmechanismus 3 den Fuß gegen die Auflagefläche preßt, wird das Ende der Kolbenstange 5 an das gegenüberliegende Ende des Schlitzes 4 verschoben, wenn die Feder 8 zusammengedrückt wird. Der Kontaktarm 6 wird dadurch gegen einen elektrischen Schalter 9 gedrückt.When the movement mechanism 3 presses the foot against the bearing surface, the end of the piston rod 5 is moved to the opposite end of the slot 4 when the spring 8 is compressed. The contact arm 6 is thereby pressed against an electrical switch 9.

Wenn die bewegliche Konstruktion stabil ist , weist der vom Stützarm gegen die Auflagefläche ausgeübte Druck für sämtliche Stützarme der Konstruktion einen gegebenen Wert auf. Falls sich dieser Druck bei einem oder mehreren Stützarmen reduziert, so ist dies ein Zeichen dafür, daß die bewegliche Konstruktion nicht mehr stabil ist.If the movable structure is stable, the pressure exerted by the support arm against the bearing surface has a given value for all support arms of the structure. If this pressure changes with a or several support arms reduced, this is a sign that the movable structure is no longer stable.

Wenn der Haltedruck für den abgebildeten Stützarm auf einen eingestellten, durch die Feder 8 bestimmten Wert absinkt, versucht die Feder 8, den Fuß weiter nach unten gegen die Auflagefläche zu drücken, wodurch der Vorsprung des Stützarms mit dem Schlitz 4 veranlaßt wird, sich im Verhältnis zum Ende 5 der Kolbenstange zu bewegen, so daß der Kontaktarm 6 nicht mehr gegen den elektrischen Schalter 9 drückt. Der Schalter 9 gibt daher ein Signal ab, das die Bedienperson der beweglichen Konstruktion warnt und/oder verhindert möglicherweise eine weitere Bewegung der Konstruktion.When the holding pressure for the support arm shown drops to a set value determined by the spring 8, the spring 8 tries to push the foot further down against the bearing surface, causing the projection of the support arm with the slot 4 to be in proportion to move the end 5 of the piston rod so that the contact arm 6 no longer presses against the electrical switch 9. The switch 9 therefore emits a signal which warns the operator of the movable structure and / or possibly prevents further movement of the structure.

Der tatsächliche Augenblick, in dem der Schalter 9 das genannte Signal auslöst, d.h. diejenige Druckreduzierung des Fußes, bei der die Anzeige erfolgen soll, kann je nach den Erfordernissen durch entsprechende Dimensionierung der Feder 8 festgelegt werden.The actual moment at which switch 9 triggers said signal, i.e. that pressure reduction of the foot at which the display is to take place can be determined according to the requirements by appropriate dimensioning of the spring 8.

Die gezeigte Anordnung des Alarmkontakts kann selbstverständlich geändert werden. Der Kontaktarm kann z.B. anstatt der gezeigten axial verschiebbaren Kolbenstange ein Schwinghebel sein. Das wesentliche Merkmal der Erfindung besteht darin, daß der Bewegungsmechanismus 3 gegen eine entsprechende Federkraft einen Bewegungsraum in Absenkrichtung des Fußes besitzt, und daß die Verschiebungen des Bewegungsmechanismus in diesem Bewegungsraum in geeigneter Weise gesteuert werden.The arrangement of the alarm contact shown can of course be changed. The contact arm can e.g. instead of the axially displaceable piston rod shown, a rocker arm. The essential feature of the invention is that the movement mechanism 3 has a movement space in the lowering direction of the foot against a corresponding spring force, and that the displacements of the movement mechanism in this movement space are controlled in a suitable manner.

Claims (1)

Stützarm für bewegliche Konstruktionen wie Personenhebevorrichtungen mit Arbeitsbühne oder bewegliche Kräne, wobei der Stützarm einen Fuß (1) besitzt, der mittels eines zwischen die Konstruktion und den Stützarm eingesetzten Bewegungsmechanismus im Verhältnis zur Auflagefläche anhebbar und absenkbar ist, dadurch gekennzeichnet, daß der Bewegungsmechanismus (3) einen Bewegungsraum (4) zwischen einer Stellung besitzt, in welcher der Fuß ('I) angehoben ist, und einer anderen Stellung, in welcher der Fuß (1) abgesenkt ist, und daß eine Feder (8) den Bewegungsmechanismus (3) in eine Stellung drückt, in welcher der Fuß (1) angehoben ist, wodurch ein Alarmschalter (9) auslösbar ist.Support arm for movable constructions such as personal lifting devices with a working platform or movable cranes, the support arm having a foot (1) which can be raised and lowered in relation to the support surface by means of a movement mechanism inserted between the construction and the support arm, characterized in that the movement mechanism (3 ) has a movement space (4) between a position in which the foot ('I) is raised and another position in which the foot (1) is lowered, and that a spring (8) moves the movement mechanism (3) in presses a position in which the foot (1) is raised, whereby an alarm switch (9) can be triggered.
EP81100669A 1980-01-29 1981-01-29 Supporting arm for mobile constructions Ceased EP0033165A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK36380A DK144639C (en) 1980-01-29 1980-01-29 STANDS FOR MOBILE PLANTS
DK363/80 1980-01-29

Publications (2)

Publication Number Publication Date
EP0033165A2 true EP0033165A2 (en) 1981-08-05
EP0033165A3 EP0033165A3 (en) 1981-12-09

Family

ID=8092673

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81100669A Ceased EP0033165A3 (en) 1980-01-29 1981-01-29 Supporting arm for mobile constructions

Country Status (5)

Country Link
US (1) US4397479A (en)
EP (1) EP0033165A3 (en)
DK (1) DK144639C (en)
FI (1) FI64553C (en)
NO (1) NO148287C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0522197A1 (en) * 1991-07-12 1993-01-13 Sellmaier, Willi, sen. Frame lift support with spring release
EP0921092A2 (en) * 1997-12-05 1999-06-09 Grove U.S. LLC Obstacle avoidance and crushing protection system for outriggers of a chassis

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US4575305A (en) * 1983-11-18 1986-03-11 Bon Ton Rolle Limited Truck mounted tube bundle pulling apparatus
US5067746A (en) * 1990-08-15 1991-11-26 Baker John E Anti-theft trailer jack and method of using same
US5310217A (en) * 1992-11-30 1994-05-10 Paskey Robert L Ram guard
US5348172A (en) * 1993-03-02 1994-09-20 Wilson Frederick F K Industrial carrying machine
US6109650A (en) * 1998-04-30 2000-08-29 Lagsdin; Andry Stabilizer pad configurations
US6986530B2 (en) 1998-04-30 2006-01-17 Andry Lagsdin Stabilizer pad configurations
US6471246B1 (en) 2000-05-23 2002-10-29 Andry Lagsdin Stabilizer pad configurations
US6634672B1 (en) 1999-10-28 2003-10-21 Andry Lagsdin Stabilizer pad for vehicles
US6422603B2 (en) 1998-10-30 2002-07-23 Andry Lagsdin Stabilizer pad for vehicles
US6726246B2 (en) 1998-10-30 2004-04-27 Andry Lagsdin Stabilizer pad for vehicles
US7073821B2 (en) * 1998-10-30 2006-07-11 Andry Lagsdin Stabilizer pad for vehicles
US7040659B2 (en) * 1998-10-30 2006-05-09 Andry Lagsdin Stabilizer pad for vehicles
US7401812B2 (en) * 2003-03-13 2008-07-22 Andry Lagsdin Stabilizer pad for vehicles
US7172216B1 (en) 2005-11-22 2007-02-06 Andry Lagsdin Stabilizer pad for vehicles
US7802814B2 (en) * 2006-08-23 2010-09-28 Andry Lagsdin Stabilized pad for vehicles
US7900962B2 (en) * 2006-11-27 2011-03-08 Andry Lagsdin Stabilizer pad for vehicles
CN102390308B (en) * 2011-09-23 2013-04-17 中联重科股份有限公司 Arm support induction device
JP6258598B2 (en) * 2013-04-17 2018-01-10 株式会社前田製作所 Crane outrigger ground contact detection mechanism and crane overturn prevention system
CN104139767B (en) * 2014-07-14 2016-07-06 贵州航天天马机电科技有限公司 A kind of automatic turning mechanism

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DE664430C (en) * 1930-12-11 1938-08-26 Feuerwehrgeraetefabrik Tilt protection for fire brigade turntable ladders
FR1037381A (en) * 1951-05-22 1953-09-16 Safety device for cranes
DE1801374U (en) * 1959-10-02 1959-12-03 Demag Zug Gmbh SUPPORTING DEVICE FOR MOBILE CRANES.
DE1456422A1 (en) * 1966-08-06 1969-01-30 Bilstein August Fa Device to limit the maximum load torque that can be absorbed by vehicles with a slewing crane
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JPS5320222A (en) * 1976-08-09 1978-02-24 Shin Meiwa Ind Co Ltd Alarm apparatus for preventing upset of those having tendency tobe upset
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DE664430C (en) * 1930-12-11 1938-08-26 Feuerwehrgeraetefabrik Tilt protection for fire brigade turntable ladders
FR1037381A (en) * 1951-05-22 1953-09-16 Safety device for cranes
DE1801374U (en) * 1959-10-02 1959-12-03 Demag Zug Gmbh SUPPORTING DEVICE FOR MOBILE CRANES.
DE1456422A1 (en) * 1966-08-06 1969-01-30 Bilstein August Fa Device to limit the maximum load torque that can be absorbed by vehicles with a slewing crane
US3848750A (en) * 1973-02-09 1974-11-19 D Hoge Crane tip alarm
DE2609631B2 (en) * 1976-03-09 1979-10-18 Carl Metz Gmbh, 7500 Karlsruhe Support for a motor vehicle
JPS5320222A (en) * 1976-08-09 1978-02-24 Shin Meiwa Ind Co Ltd Alarm apparatus for preventing upset of those having tendency tobe upset

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0522197A1 (en) * 1991-07-12 1993-01-13 Sellmaier, Willi, sen. Frame lift support with spring release
EP0921092A2 (en) * 1997-12-05 1999-06-09 Grove U.S. LLC Obstacle avoidance and crushing protection system for outriggers of a chassis
EP0921092A3 (en) * 1997-12-05 1999-06-16 Grove U.S. LLC Obstacle avoidance and crushing protection system for outriggers of a chassis
US6067024A (en) * 1997-12-05 2000-05-23 Grove U.S. L.L.C. Obstacle avoidance and crushing protection system for outriggers of a chassis

Also Published As

Publication number Publication date
NO810123L (en) 1981-07-30
DK144639C (en) 1982-09-27
US4397479A (en) 1983-08-09
FI64553B (en) 1983-08-31
NO148287C (en) 1983-09-14
DK36380A (en) 1981-07-30
EP0033165A3 (en) 1981-12-09
NO148287B (en) 1983-06-06
FI64553C (en) 1983-12-12
DK144639B (en) 1982-04-26
FI810234L (en) 1981-07-30

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