EP3718948B1 - Unité de stabilisation pour véhicule à moteur - Google Patents

Unité de stabilisation pour véhicule à moteur Download PDF

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Publication number
EP3718948B1
EP3718948B1 EP20167927.1A EP20167927A EP3718948B1 EP 3718948 B1 EP3718948 B1 EP 3718948B1 EP 20167927 A EP20167927 A EP 20167927A EP 3718948 B1 EP3718948 B1 EP 3718948B1
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Prior art keywords
hydraulic
hydraulic cylinder
check valve
compartment
hydraulic line
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EP20167927.1A
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German (de)
English (en)
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EP3718948C0 (fr
EP3718948A1 (fr
Inventor
Massimo BORTOLI
Alessandro CASTELLAN
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Oleodinamica Panni SRL
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Oleodinamica Panni SRL
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    • 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
    • B66C23/80—Supports, e.g. outriggers, for mobile cranes hydraulically actuated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/12—Arrangements of means for transmitting pneumatic, hydraulic, or electric power to movable parts of devices

Definitions

  • the present invention relates to the technical sector concerning the stabilising of a motor vehicle, for example a motor crane.
  • the invention relates to a stabilising unit for a motor vehicle.
  • Figure 1 generically illustrates a motor crane (100) of known type, which comprises four stabilising units (102), two per side.
  • Figure 2 is a partial rear view of the motor crane (100) of figure 1 .
  • These stabilising units (102) are necessary when the telescopic arms (103) of the motor crane (100) are extended and are moving a load in cantilever fashion with respect to the profile of the motor crane (100): in this case the drive of the stabilising unit (102) raises the wheels (101) of the motor crane (100), which stabilises the motor crane (100).
  • each stabilising unit (102) comprises: a stabiliser foot (2); a first hydraulic cylinder (11) and a second hydraulic cylinder (12).
  • the first hydraulic cylinder (11) comprises a first jacket (81) and a first piston (91), is vertically orientated and bears, via the first piston (91), the stabiliser foot (2) in order to move the foot (2) from a raised position (not illustrated), so that it is raised from a ground surface (6), and a lowered position (L) ( figures 1 and 2 ), so that it is in contact with the ground surface (6).
  • the second hydraulic cylinder (12) is horizontally orientated, and comprises a second jacket (82) which is solidly constrained to the frame (5) of the motor crane (100) and a second piston (92) which in turn: can move between a retracted position (not illustrated) and an extended position (E) ( figure 2 ); and is solidly constrained to the first jacket (81) of the first hydraulic cylinder (11).
  • the second piston (92) can be stably blocked in intermediate positions (not illustrated) between the retracted position and the extended position (E).
  • the stabilising unit (102) comprises a first hydraulic line (61) which is connected to a first thrust chamber (13) of the first hydraulic cylinder (11) and a second hydraulic line (62) which is connected to a first pull chamber of the first hydraulic cylinder (11).
  • the first hydraulic line (61) and the second hydraulic line (62) flow through flexible tubes (not illustrated) which are free (not illustrated) or constrained to an overhead tract (105) ( figure 2 ) or wound about springloaded hydraulic tube reels (not illustrated).
  • a stabilising unit that is not stable in each condition and/or operating configuration is not working correctly as it does not guarantee the necessary safety, either when being used or when the whole motor vehicle is being used, i.e. when the hydraulic lines are not supplied.
  • the aim of the present invention consists in obviating the above-mentioned drawbacks.
  • the above aim is attained with a stabilising unit for a motor vehicle, according to claim 1, a stabilising apparatus for a motor vehicle according to claim 8 and a motor vehicle according to claim 10.
  • reference numeral (1) denotes a stabilising unit for a motor vehicle (100), object of the present invention, comprising:
  • the first hydraulic cylinder (11) is preferably orientated vertically when the second hydraulic cylinder (12) is borne by the motor vehicle (100).
  • the first hydraulic cylinder (11) comprises a first jacket (81) and a first piston (91) which slides in the first jacket (81).
  • the first hydraulic cylinder (12) is preferably orientated horizontally when the second hydraulic cylinder (12) is borne by the motor vehicle (100).
  • the second hydraulic cylinder (12) comprises a second jacket (82) and a second piston (92) which slides in the second jacket (82).
  • the motor vehicle (100) can be a motor crane (100).
  • fixed part (7) is taken to mean that it is solidly constrained to the frame (5) of the motor vehicle (100), when the second hydraulic cylinder (12) is borne by the motor vehicle (100).
  • the fixed part (7) comprises the second jacket (82) of the second hydraulic cylinder (12).
  • the movable part (8) comprises the second piston (92) of the second hydraulic cylinder (12).
  • the first telescopic pipeline (31) preferably comprises a first conduit (71) which is solidly constrained to the fixed part (7) of the second hydraulic cylinder (12), and a second conduit (72) which is solidly constrained to the movable part (8) of the second hydraulic cylinder (12) and which is telescopically movable along the first conduit (71);
  • the second telescopic pipeline (32) comprises a third conduit (73) is solidly constrained to the fixed part (7) of the second hydraulic cylinder (12), and a fourth conduit (74) which is solidly constrained to the movable part (8) of the second hydraulic cylinder (12) and which is telescopically movable along the third conduit (73).
  • the second conduit (72) is preferably movable internally of the first conduit (71) and the fourth conduit (74) is movable internally of the third conduit (73).
  • the first telescopic pipeline (31) and the second telescopic pipeline (32) are external of the second hydraulic cylinder (12), while according to a second embodiment, illustrated in figure 8 , the first telescopic pipeline (31) and the second telescopic pipeline (32) are incorporated in the second hydraulic cylinder (12).
  • the first check valve (51) is preferably piloted by the second hydraulic line (62) at a point upstream of the second check valve (52); and the second check valve (52) is piloted by the first hydraulic line (61) at a point upstream of the first check valve (51).
  • the third check valve (53) is preferably piloted by the fourth hydraulic line (64) at a point upstream of the fourth check valve (54); and the fourth check valve (54) is piloted by the third hydraulic line (63) at a point upstream of the third check valve (53).
  • the embodiments of the stabilising unit (1) described above can be installed on many motor vehicles (100) which already have their own directional control valves, as they do not require the use of specificallyconceived drives; these valves can be appropriately configured on the basis of the teachings that follow.
  • the stabilising unit (1) can comprise a first directional control valve (121) which is connectable to the first hydraulic line (61) and to the second hydraulic line (62) on one side, and to a hydraulic oil infeed (P) and to a hydraulic oil discharge (T), on the other side.
  • the stabilising unit (1) can further comprise a second directional control valve (122) which is connected to the third hydraulic line (63) and to the fourth hydraulic line (64) on one side, and to the hydraulic oil infeed (P) and to the hydraulic oil discharge (T), on the other side.
  • the first directional control valve (121) comprises a first compartment (131), a second compartment (132) and a third compartment (133).
  • first compartment (131) When the first compartment (131) is selected, then the first hydraulic line (61) is connected to the hydraulic oil discharge (T) and the second hydraulic line (62) is connected to the hydraulic oil infeed (P); when the second compartment (132) is selected, then the first hydraulic line (61), the second hydraulic line (62) and the hydraulic oil infeed (P) are connected to the hydraulic oil discharge (T); when the third compartment (133) is selected, then the first hydraulic line (61) is connected to the hydraulic oil infeed (P) and the second hydraulic line (62) is connected to the hydraulic oil discharge (T).
  • the second directional control valve (122) comprises a fourth compartment (134), a fifth compartment (135) and a sixth compartment (136).
  • the fourth compartment (134) is selected, then the third hydraulic line (63) is connected to the hydraulic oil infeed (P) and the fourth hydraulic line (64) is connected to the hydraulic oil discharge (T); when the fifth compartment (135) is selected, then the third hydraulic line (63) and the fourth hydraulic line (64) are connected to the hydraulic oil discharge (T); when the sixth compartment (136) is selected, then the third hydraulic line (63) is connected to the hydraulic oil discharge (T) and the fourth hydraulic line (64) is connected to the hydraulic oil infeed (P).
  • the first directional control valve (121) and the second directional control valve (122) are respectively interchangeable or replaceable, so that: it is possible to use only the first directional control valve (121) present in two units so as to connect to the first hydraulic line (61) and the second hydraulic line (62) (first unit, see figure 9 ) and so as to connect to the third hydraulic line (63) and the fourth hydraulic line (64) (second unit); it is possible to use only the second directional control valve (122) present in two units so as to connect to the first hydraulic line (61) and the second hydraulic line (62) (first unit) and so as to connect to the third hydraulic line (63) and the fourth hydraulic line (64) (second unit, figure 9 ); it is possible to exchange the first directional control valve (121) and the second directional control valve (122), so that the first directional control valve (121) is connected to the third hydraulic line (63) and the fourth hydraulic line (64) and the second directional control valve (122) is connected to the first hydraulic line (61) and the second hydraulic line (62).
  • a further aim of the present invention is a stabilising apparatus (99) for a motor vehicle (100) which comprises a plurality of stabilising units (1) of the above-described type.
  • the motor vehicle (100) can comprise four stabilising units (1); the figures illustrate two stabilising units (1).
  • the following is a description of the functioning of the stabilising unit (1), to bring the motor crane (100) from a non-stabilised configuration, figures 3, 3A , to a stabilised configuration, figures 5 , 5A , according to the first embodiment.
  • the first hydraulic cylinder (11) is in the raised position and the second hydraulic cylinder (12) is in the retracted position (R).
  • the first hydraulic line (61), the second hydraulic line (62), the third hydraulic line (63) and the fourth hydraulic line (64) are connected to the discharge.
  • This operating configuration is shown in figure 9 : in the first directional control valve (121) the second compartment (132) is selected and in the second directional control valve (122) the fifth compartment (135) is selected.
  • first hydraulic line (61) and the second hydraulic line (62) are connected to the hydraulic oil discharge (T), in order to prevent the extraction of the second conduit (72) from the first conduit (71) and of the fourth conduit (74) from the third conduit (73) from generating forces that oppose the advancement of the second piston (92) towards the extended position (E), creating depressions such as to compromise, even permanently, the functioning of the stabilising unit (1).
  • the fifth compartment (135) is selected, in order to connect also the third hydraulic line (63) to the hydraulic oil discharge (T).
  • the third check valve (53) and the fourth check valve (54) respectively prevent the exit of hydraulic oil from the second thrust chamber (14) and from the second pull chamber (16), and this guarantees that the second hydraulic cylinder (12) is maintained stably in the extended position (E). This condition persists, for example, even should the hydraulic oil infeed (P) be interrupted.
  • the hydraulic oil passing through the first hydraulic line (61) pilots the second check valve (52), which enables the hydraulic oil present in the first pull chamber (15) to pass through the second check valve (52) and to go towards the hydraulic oil discharge (T). Therefore, the first thrust chamber (13) begins to expand while the first pull chamber (15) begins to reduce.
  • the first hydraulic cylinder (11) is thus brought into the lowered position (L) until the stabiliser foot (2) contacts the ground surface (6).
  • the third check valve (53) and the fourth check valve (54) respectively prevent the exit of hydraulic oil from the second thrust chamber (14) and from the second pull chamber (16), and this guarantees that the second hydraulic cylinder (12) is maintained stably in the extended position (E).
  • the first directional control valve (121) the second compartment (132) is selected, in order to connect also the first hydraulic line (61) to the hydraulic oil discharge (T).
  • the first check valve (51) and the second check valve (52) respectively prevent the exit of hydraulic oil from the first thrust chamber (13) and from the first pull chamber (15), and this guarantees that the first hydraulic cylinder (11) is maintained stably in the lowered position (L).
  • the stabilising unit (1) can be operated to make and maintain the second hydraulic cylinder (12) stable in intermediate positions between the retracted position (R) and the extended position (E).
  • the first hydraulic line (61) remains connected to the hydraulic oil discharge (T)
  • the second hydraulic line (62) is connected to the hydraulic oil infeed (P)
  • the third hydraulic line (63) remains connected to the hydraulic oil discharge (T)
  • the fourth hydraulic line (64) remains connected to the hydraulic oil discharge (T).
  • the hydraulic oil which flows through the second hydraulic line (62) pilots the first check valve (51), which enables the hydraulic oil present in the first thrust chamber (13) to pass through the first check valve (51) and to go towards the hydraulic oil discharge (T). Therefore, the first thrust chamber (15) begins to expand while the first pull chamber (13) begins to reduce.
  • the first hydraulic cylinder (11) is brought towards the raised position, while the second hydraulic cylinder (12) is maintained stably in the extended position (E) for the reasons already explained in the foregoing.
  • the second compartment (132) is selected, in order to connect also the second hydraulic line (62) to the hydraulic oil discharge (T).
  • the second hydraulic cylinder (12) is brought towards the retracted position (E).
  • first hydraulic line (61) and the second hydraulic line (62) are connected to the hydraulic oil discharge (T), to prevent the telescopic insertion of the second conduit (72) into the first conduit (71) and of the fourth conduit (74) into the third conduit (73) from generating forces that oppose the retraction of the second piston (92) towards the retracted position (R), creating overpressures such as to compromise, even permanently, the functioning of the stabilising unit (1).
  • the fifth compartment (135) is selected, in order to connect also the fourth hydraulic line (64) to the hydraulic oil discharge (T).
  • the functioning of the stabilising unit (1) according to the second embodiment is alike to the one already described in the foregoing with reference to the first embodiment.
  • hydraulic line indicates an independent entity, i.e. distinct from other hydraulic lines; for example, a hydraulic line connects a single-chamber distributor of a hydraulic cylinder.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Combined Devices Of Dampers And Springs (AREA)
  • Vehicle Body Suspensions (AREA)

Claims (10)

  1. Unité de stabilisation (1) pour un véhicule à moteur (100), comprenant :
    un pied stabilisateur (2) ;
    un premier vérin hydraulique (11) qui supporte le pied stabilisateur (2) de manière à déplacer le pied stabilisateur (2) entre une position relevée (H), afin d'être soulevé d'une surface au sol (6), et une position abaissée (L), afin d'être en contact avec la surface au sol (6) ;
    un deuxième cylindre hydraulique (12) qui peut être porté par un véhicule à moteur (100), qui comprend une partie fixe (7), et qui comprend une partie mobile (8) qui à son tour : peut se déplacer entre une position rétractée (R) et une position étendue (E) ; et porte le premier cylindre hydraulique (11) ;
    une première canalisation télescopique (31) qui, à une première extrémité (41), est solidement fixée à la partie fixe (7) du second cylindre hydraulique (12) et qui, à une seconde extrémité (42), opposée à la première extrémité (41), est solidement fixée à la partie mobile (8) du second cylindre hydraulique (12), de sorte que lorsque le second cylindre hydraulique (12) est en position rétractée (R), la première canalisation télescopique (31) est également rétractée et lorsque le second cylindre hydraulique (12) est en position déployée (E), la première canalisation télescopique (31) est également déployée ;
    une deuxième canalisation télescopique (32) qui, à une troisième extrémité (43), est solidement fixée à la partie fixe (7) du deuxième cylindre hydraulique (12) et qui, à une quatrième extrémité (44), opposée à la troisième extrémité (43), est solidement fixée à la partie mobile (8) du deuxième cylindre hydraulique (12), de sorte que lorsque le second cylindre hydraulique (12) est en position rétractée (R), la seconde canalisation télescopique (32) est également rétractée et lorsque le second cylindre hydraulique (12) est en position sortie (E), la seconde canalisation télescopique (32) est également sortie ;
    un premier clapet anti-retour (51) dont l'ouverture peut être pilotée ;
    un second clapet anti-retour (52) dont l'ouverture peut être pilotée ;
    une première conduite hydraulique (61) qui : traverse la première conduite télescopique (31) ; traverse le premier clapet anti-retour (51) et est reliée à une première chambre de poussée (13) du premier cylindre hydraulique (11), le premier clapet anti-retour (51) étant disposé de manière à permettre le passage du liquide vers la première chambre de poussée (13) du premier cylindre hydraulique (11) ;
    et une deuxième conduite hydraulique (62) qui : passe par la deuxième canalisation télescopique (32) ; passe par le deuxième clapet anti-retour (52) et est reliée à une première chambre de traction (15) du premier cylindre hydraulique (11), le deuxième clapet anti-retour (52) étant disposé de manière à permettre le passage du liquide vers la première chambre de traction (15) du premier cylindre hydraulique (11) ;
    l'unité de stabilisation (1) est caractérisée en ce qu'elle comprend en outre
    un troisième clapet anti-retour (53) dont l'ouverture peut être pilotée ;
    un quatrième clapet anti-retour (54) dont l'ouverture peut être pilotée ;
    une troisième conduite hydraulique (63) qui traverse le troisième clapet anti-retour (53) et qui est reliée à une deuxième chambre de poussée (14) du deuxième cylindre hydraulique (12), le troisième clapet anti-retour (53) étant disposé de manière à permettre le passage du liquide vers la deuxième chambre de poussée (14) du deuxième cylindre hydraulique (12) ;
    une quatrième conduite hydraulique (64) qui traverse le quatrième clapet anti-retour (54) et qui est reliée à une deuxième chambre de traction (16) du deuxième vérin hydraulique (12), le quatrième clapet anti-retour (54) étant disposé de manière à permettre le passage du liquide vers la deuxième chambre de traction (16) du deuxième vérin hydraulique (12).
  2. L'unité de stabilisation (1) de la revendication précédente, dans laquelle : la première canalisation télescopique (31) comprend un premier conduit (71) qui est solidement contraint à la partie fixe (7) du deuxième cylindre hydraulique (12), et un deuxième conduit (72) qui est solidement contraint à la partie mobile (8) du deuxième cylindre hydraulique (12) et qui est télescopiquement mobile le long du premier conduit (71) ; la deuxième conduite télescopique (32) comprend un troisième conduit (73) qui est solidement contraint à la partie fixe (7) du deuxième cylindre hydraulique (12), et un quatrième conduit (74) qui est solidement contraint à la partie mobile (8) du deuxième cylindre hydraulique (12) et qui est télescopiquement mobile le long du troisième conduit (73).
  3. L'unité de stabilisation (1) de la revendication précédente, dans laquelle le premier conduit télescopique (31) et le second conduit télescopique (32) sont extérieurs au second cylindre hydraulique (12).
  4. L'unité de stabilisation (1) de la revendication 2, dans laquelle la première canalisation télescopique (31) et la deuxième canalisation télescopique (32) sont incorporées dans le deuxième cylindre hydraulique (12).
  5. L'unité de stabilisation (1) de l'une quelconque des revendications précédentes, dans laquelle : le premier clapet anti-retour (51) est piloté par la deuxième conduite hydraulique (62) en un point situé en amont du deuxième clapet anti-retour (52) ; et le deuxième clapet anti-retour (52) est piloté par la première conduite hydraulique (61) en un point situé en amont du premier clapet anti-retour (51).
  6. L'unité de stabilisation (1) de l'une quelconque des revendications précédentes, dans laquelle le troisième clapet anti-retour (53) est piloté par la quatrième conduite hydraulique (64) en un point situé en amont du quatrième clapet anti-retour (54) ; et le quatrième clapet anti-retour (54) est piloté par la troisième conduite hydraulique (63) en un point situé en amont du troisième clapet anti-retour (53).
  7. L'unité de stabilisation (1) de l'une quelconque des revendications précédentes, dans laquelle :
    elle comprend un premier distributeur (121) qui est relié à la première conduite hydraulique (61) et à la deuxième conduite hydraulique (62) d'un côté, et à une entrée d'huile hydraulique (P) et à une sortie d'huile hydraulique (T), de l'autre côté ;
    il comprend un second distributeur (122) qui est relié à la troisième conduite hydraulique (63) et à la quatrième conduite hydraulique (64) d'un côté, et à l'alimentation en huile hydraulique (P) et à la décharge d'huile hydraulique (T) de l'autre côté ;
    le premier distributeur (121) comprend un premier compartiment (131), un deuxième compartiment (132) et un troisième compartiment (133) et est configuré de telle sorte que : lorsque le premier compartiment (131) est sélectionné, la première conduite hydraulique (61) est reliée à la décharge d'huile hydraulique (T) et la deuxième conduite hydraulique (62) est reliée à l'alimentation en huile hydraulique (P) ; lorsque le deuxième compartiment (132) est sélectionné, la première conduite hydraulique (61) et la deuxième conduite hydraulique (62) sont reliées à la décharge d'huile hydraulique (T) ; lorsque le troisième compartiment (133) est sélectionné, la première conduite hydraulique (61) est reliée à l'alimentation en huile hydraulique (P) et la deuxième conduite hydraulique (62) est reliée à la décharge d'huile hydraulique (T) ; le deuxième distributeur (122) comprend un quatrième compartiment (134), un cinquième compartiment (135) et un sixième compartiment (136) et est configuré de manière à ce que : lorsque le quatrième compartiment (134) est sélectionné, la troisième conduite hydraulique (63) est reliée à l'alimentation en huile hydraulique (P) et la quatrième conduite hydraulique (64) est reliée à l'évacuation de l'huile hydraulique (T) ; lorsque le cinquième compartiment (135) est sélectionné, la troisième conduite hydraulique (63) et la quatrième conduite hydraulique (64) sont reliées à la décharge d'huile hydraulique (T) ; lorsque le sixième compartiment (136) est sélectionné, la troisième conduite hydraulique (63) est reliée à la décharge d'huile hydraulique (T) et la quatrième conduite hydraulique (64) est reliée à l'alimentation en huile hydraulique (P).
  8. Appareil de stabilisation (99) pour un véhicule à moteur (100), comprenant plusieurs unités de stabilisation (1) selon l'une quelconque des revendications précédentes.
  9. Appareil de stabilisation (99) selon la revendication précédente, dans lequel :
    il comprend un premier distributeur (121) comprenant un premier compartiment (131), un deuxième compartiment (132) et un troisième compartiment (133) ;
    il comprend un deuxième distributeur (122) comprenant un quatrième compartiment (134), un cinquième compartiment (135) et un sixième compartiment (136) ;
    dans lequel le premier distributeur (121) et le second distributeur (122) sont configurés pour se connecter aux conduites hydrauliques (61, 62, 63, 64) de deux unités de stabilisation (1) de la pluralité d'unités de stabilisation (1).
  10. Véhicule automobile (100), comprenant un dispositif de stabilisation (99) selon la revendication précédente.
EP20167927.1A 2019-04-04 2020-04-03 Unité de stabilisation pour véhicule à moteur Active EP3718948B1 (fr)

Applications Claiming Priority (1)

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IT102019000005076A IT201900005076A1 (it) 2019-04-04 2019-04-04 Unita' di stabilizzazione per automezzo

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EP3718948A1 EP3718948A1 (fr) 2020-10-07
EP3718948C0 EP3718948C0 (fr) 2024-05-29
EP3718948B1 true EP3718948B1 (fr) 2024-05-29

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202200018219A1 (it) 2022-09-07 2024-03-07 Oleodinamica Panni S R L Dispositivo per alimentare e per spostare uno strumento idraulico, sistema e automezzo

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Publication number Priority date Publication date Assignee Title
US3856152A (en) * 1973-12-03 1974-12-24 Koehring Co Outrigger hydraulic system
DE9301899U1 (de) * 1993-02-11 1993-07-29 Langerbein-Scharf GmbH & Co. KG, 4700 Hamm Hydraulische Betätigungsvorrichtung mit zumindest zwei gekoppelten Betätigungselementen
CN2601238Y (zh) * 2003-01-13 2004-01-28 安徽省三色照明股份有限公司 起重机水平支腿和垂直支腿顺序伸缩动作的液压控制装置
US6813988B2 (en) * 2003-02-12 2004-11-09 Leonard Kruppa Sequential hydraulic extension system

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EP3718948C0 (fr) 2024-05-29
EP3718948A1 (fr) 2020-10-07
IT201900005076A1 (it) 2020-10-04

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