EP0286615A1 - Cric articulé - Google Patents

Cric articulé Download PDF

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Publication number
EP0286615A1
EP0286615A1 EP88850114A EP88850114A EP0286615A1 EP 0286615 A1 EP0286615 A1 EP 0286615A1 EP 88850114 A EP88850114 A EP 88850114A EP 88850114 A EP88850114 A EP 88850114A EP 0286615 A1 EP0286615 A1 EP 0286615A1
Authority
EP
European Patent Office
Prior art keywords
lifting
articulated
frame
jack
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.)
Withdrawn
Application number
EP88850114A
Other languages
German (de)
English (en)
Inventor
Toivo Mäkelä
Raine Vierto
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.)
Vierto Raine
Original Assignee
Vierto Raine
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 Vierto Raine filed Critical Vierto Raine
Publication of EP0286615A1 publication Critical patent/EP0286615A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, 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
    • B66F7/00Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/08Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement hydraulically or pneumatically operated
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, 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
    • B66F7/00Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/065Scissor linkages, i.e. X-configuration

Definitions

  • the present invention relates to an articulated jack consisting of a frame placed on a base, e.g. a floor, a lifting table and articulated levers which are located between the frame and the lifting table and movable by means of a pressure cylinder.
  • a disadvantage with known types of articulated jack of this category is the fact that their size and weight are in proportion to the lifting capacity. For example, in articulated jacks used to lift up cars, the height of the jack in the lowest position has to be about 30 cm when a lifting capacity of two tons is required. For ordinary cars, this 30 cm height is generally too much.
  • the object of the present invention is to eliminate the drawbacks mentioned.
  • the articulated jack of the invention is characterized in that the pressure cylinder is placed in the horizontal plane of the frame, the force of the cylinder being applied between one of the end beams of the frame and a connecting beam which connects the movable lower ends of the articulated levers.
  • the invention enables a very low jack construction, even 12 cm, to be achieved because the pressure cylinder can be placed in the horizontal plane and the articulated levers, when in the lowest position, can also be folded down horizontally side by side.
  • An advantageous embodiment of the invention is characterized in that the body of the pressure cylinder is connected by means of a transverse shaft to lugs attached to the connecting beam and provided with elongated holes, in such manner that the cylinder body, supported by the transverse shaft, moves in the elongated holes while a preliminary lifter placed at the opposite end of the cylinder body lifts the articulated levers from a beam placed between them to a preliminary lifting position before the lifting movement proper begins. In this manner, a sufficient lifting power is achieved for the initial lifting stage when the load rests on the jack.
  • the preliminary lifter consists of a lifting lever pivoted on the ends of flat bars attached to the lugs, the preliminary lifting movement of the lifting cylinder being transmitted to said lever.
  • the preliminary lifter can freely follow the movements of the pressure cylinder and requires no separate actuating means.
  • a further advantageous embodiment of the invention is characterized in that the movable lower ends of the articulated levers are provided with safety latches movable in the transverse direction and actuated e.g. by pressurized air, the jack being locked in position by the ends of the latch bars engaging lock holes located in the lateral beams of the jack frame.
  • the articulated jack consists of a frame 1 placed on a base, e.g. a floor, a lifting table 2 and articulated levers 3,4 located between the frame and the lifting table and movable by means of a pressure cylinder 5.
  • the pressure cylinder is placed in the horizontal plane of the frame, the force of the cylinder being applied between one end beam 6 of the frame and a connecting beam 7 which connects the movable lower ends of the articulated levers 3.
  • the body of the pressure cylinder 5 is connected by means of a transverse shaft 8 to lugs 10 attached to the connecting beam 7 and provided with elongated holes 9, in such manner that, at the beginning of a lifting operation, the cylinder body and the transverse shaft 8 supporting it move as far as permitted by the elongated holes 9 while a preliminary lifter 11 placed at the opposite end of the cylinder body lifts the articulated levers 3,4 from a beam 12 placed between them to a preliminary lifting position before the lifting movement proper begins.
  • the preliminary lifter 11 consists of a lifting lever 14 pivoted on the ends of flat bars 13 attached to the lugs 10, the preliminary lifting movement of the lifting cylinder 5 being transmitted to said lever 14.
  • the movable lower ends of the articulated levers 3 are provided with spring-loaded safety latches 15 movable in the transverse direction and actuated e.g. by pressurized air, the jack being locked in position by the ends of the latch bars engaging lock holes 16 located in the lateral beams of the jack frame.
  • the latch bar 15 moves from hole to hole 16 as the jack is performing a lifting movement, and when the jack is being lowered, the latch bar 15 is pushed inwards, i.e. to the open position, by means of pressurized air supplied through the opening indicated by the arrow 18.
EP88850114A 1987-04-10 1988-03-30 Cric articulé Withdrawn EP0286615A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI871591 1987-04-10
FI871591A FI77632C (fi) 1987-04-10 1987-04-10 Saxkran.

Publications (1)

Publication Number Publication Date
EP0286615A1 true EP0286615A1 (fr) 1988-10-12

Family

ID=8524304

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88850114A Withdrawn EP0286615A1 (fr) 1987-04-10 1988-03-30 Cric articulé

Country Status (2)

Country Link
EP (1) EP0286615A1 (fr)
FI (1) FI77632C (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2673926A1 (fr) * 1991-03-14 1992-09-18 Duarib Sa Plate-forme elevatrice a ciseaux.
EP0520137A1 (fr) * 1991-06-22 1992-12-30 Eisenberg, Hans-Jochen Plateforme de lavage pour composer des scènes de théatre ou analogue
DE29610999U1 (de) * 1996-06-22 1996-08-29 Hydraulik Techniek Scherenhubtisch
EP0957062A2 (fr) * 1998-05-14 1999-11-17 GIULIANO S.r.l. Plate-forme de levage pour véhicules avec une tringlerie pour réduire l' effort de levage au début du déploiement

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH328193A (de) * 1954-12-01 1958-02-28 Peter & Co Konstruktionswerkst Hebeeinrichtung, insbesondere für Automobile
FR1560817A (fr) * 1968-01-19 1969-03-21
CH473731A (de) * 1967-05-30 1969-06-15 Binz & Co Bühne mit Hebevorrichtung, für Krankentrage
CH496619A (fr) * 1968-09-17 1970-09-30 Buchs Maurice Elévateur
DE1934024A1 (de) * 1969-07-04 1971-01-21 Gewerk Eisenhuette Westfalia Hebetisch
US3700070A (en) * 1971-07-21 1972-10-24 Concrete Formwork Eng Pty Ltd Scissors-type linkage
GB2108926A (en) * 1981-09-15 1983-05-25 Figgie Int Inc Scissors jack

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH328193A (de) * 1954-12-01 1958-02-28 Peter & Co Konstruktionswerkst Hebeeinrichtung, insbesondere für Automobile
CH473731A (de) * 1967-05-30 1969-06-15 Binz & Co Bühne mit Hebevorrichtung, für Krankentrage
FR1560817A (fr) * 1968-01-19 1969-03-21
CH496619A (fr) * 1968-09-17 1970-09-30 Buchs Maurice Elévateur
DE1934024A1 (de) * 1969-07-04 1971-01-21 Gewerk Eisenhuette Westfalia Hebetisch
US3700070A (en) * 1971-07-21 1972-10-24 Concrete Formwork Eng Pty Ltd Scissors-type linkage
GB2108926A (en) * 1981-09-15 1983-05-25 Figgie Int Inc Scissors jack

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2673926A1 (fr) * 1991-03-14 1992-09-18 Duarib Sa Plate-forme elevatrice a ciseaux.
EP0520137A1 (fr) * 1991-06-22 1992-12-30 Eisenberg, Hans-Jochen Plateforme de lavage pour composer des scènes de théatre ou analogue
DE29610999U1 (de) * 1996-06-22 1996-08-29 Hydraulik Techniek Scherenhubtisch
EP0957062A2 (fr) * 1998-05-14 1999-11-17 GIULIANO S.r.l. Plate-forme de levage pour véhicules avec une tringlerie pour réduire l' effort de levage au début du déploiement
EP0957062A3 (fr) * 1998-05-14 2001-03-21 GIULIANO S.r.l. Plate-forme de levage pour véhicules avec une tringlerie pour réduire l' effort de levage au début du déploiement

Also Published As

Publication number Publication date
FI871591A (fi) 1988-10-11
FI871591A0 (fi) 1987-04-10
FI77632B (fi) 1988-12-30
FI77632C (fi) 1989-04-10

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