US3309060A - Lift for motor vehicles - Google Patents

Lift for motor vehicles Download PDF

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Publication number
US3309060A
US3309060A US485721A US48572165A US3309060A US 3309060 A US3309060 A US 3309060A US 485721 A US485721 A US 485721A US 48572165 A US48572165 A US 48572165A US 3309060 A US3309060 A US 3309060A
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United States
Prior art keywords
column
nut
screw
blocks
movable assembly
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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.)
Expired - Lifetime
Application number
US485721A
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English (en)
Inventor
Villars Julio
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Individual
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Individual
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Publication of US3309060A publication Critical patent/US3309060A/en
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Expired - Lifetime 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
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/02—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms suspended from ropes, cables, or chains or screws and movable along pillars
    • B66F7/025—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms suspended from ropes, cables, or chains or screws and movable along pillars screw operated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
    • F16H25/2472—Safety nuts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18568—Reciprocating or oscillating to or from alternating rotary
    • Y10T74/18576—Reciprocating or oscillating to or from alternating rotary including screw and nut

Definitions

  • Certain of them comprise a movable assembly guided along laterally offset columns, the vertical movements of which are controlled by a lifting device housed in these columns.
  • certain known lifts comprise a movable assembly guided along a single laterally offset column which protects the lifting device. To this end, the movable assembly engages the column through the agency of rollers or other rolling members running along this motive column.
  • this kind of lift must be provided with special safety devices in order to avoid a free fall of the movable assembly in the case of damage to the lifting members or further so that, when an object or a person is, inadvertently, under the raised car in such circumstances the object or person will not be crushed.
  • the present invention has for its object a lift for motor vehicles comprising lifting members carried by at least one slide guided along at least one laterally offset column and moved vertically by a controlled lifting device.
  • This lift differs from known lifts in that the slide or slides are each provided with guide-blocks sliding along the columns, the relative positions of said guide-blocks, their dimensions and their friction coefiicient on the faces of the columns being determined so that in the rest position of the movable assembly or during the descending movement of the latter, only a small part of the weight of the movable assembly and of its possible load is supported by the lifting device, so that in the case of damage to the lifting device, the speed of the fall of the movable assembly is strongly braked and the irreversibility of transmission ensured.
  • FIG. 1 is a profile view thereof.
  • FIG. 2 is a plan view thereof.
  • FIG. 3 is a sectional view on a large scale of the slide and of the motive column along line III-Ill of FIG. 1.
  • FIG. 4 is a partial sectional view and on a larger scale of the lifting device along line IVIV of FIG. 3.
  • FIG. 5 is a sectional view and on a large scale along line VV of FIG. 3.
  • the lifting device shown comprises a movable assembly constituted by two lifting arms 1 on which bears the car to be lifted with the interposition of blocks 55 of soft material, for example rubber. These arms are rigidly connected at one of their ends to a slide 2 which slides along a laterally offset motive column 3.
  • This column is carried by a carriage formed by a beam 6 parallel to the arms 1 and provided at its front end with a pivot 7 carrying a spindle 8 having at each of its ends a roller 9 (one only of which is visible in the figure).
  • a small beam 4, perpendicular to the arms 1 and provided at each of its ends with a roller 5, is fixed at its center on the beam 6, behind the column 3.
  • a steering pole 10, hinged at the upper end of the pivot 7, allows for easily moving and guiding the lift.
  • the arms 1 are each constituted by a shaped piece, the section of which is of general rectangular shape, but could have any other desired shape such as circular, solid or hollow, a plain or double T, and the like.
  • the motive column 3 includes two vertical bars 11, each being of generally rectangular cross-section and firmly interconnected at their lower and upper ends by plates 12. These bars could also have a square, hollow or solid, double U or double T cross section.
  • a screw 13 suspended at the upper end of the column 3 through the agency of an axial bearing 17 is driven to rotate by an electric motor 14 and a speed reducer 15.
  • the lower end of this screw 13 is guided by a bearing 16 fixed to the column.
  • a bearing nut 18 is engaged on the screw 13 and has two opposed trunnions 19, each provided with a groove 20.
  • the slide 2 includes two braces 21 each provided with an aperture or slot 22 opening downwardly. These apertures are engaged in the grooves 20, so that the whole of the movable outfit rests on the bearing nut 18 through the agency of the braces 21.
  • the movable assembly is guided in its vertical movements along the column 3, on the one hand by upper guide-blocks 23:: carried by supports 23 fixed to the upper part of the slide 2 and bearing on the rear faces 24 of the bars 11 and on the other hand by lower guide-blocks 25a carried by supports 25 fixed to the lower part of the slide 2 and bearing on the front faces 26 of the bars 11.
  • These guide-blocks are of a material having a high friction coefficient relative to the metal of the bars 11.
  • these guide-blocks are constituted by linings 23a, 25a which may be in nylon, natural or synthetic fibres or again be constituted by brake linings. Satisfactory results have been obtained by impregnating brake linings with a greasy material such as tallow. It is known that brake linings do not require any maintenance.
  • the supports 25 and 23 are further provided with auxiliary guide-blocks 27 adapted to bear on the outer side faces 28 of the bars 11. These guide-blocks prevent any tendency to rock when one of the two arms 1 is more loaded than the other.
  • the operator actuates an operating member constituted in the example shown by a wheel 40 to bring its index i opposite a mark M (lifting).
  • the shaft of this wheel is connected by a rod 41 to a rocker-arm 42 integral with the shaft 43 of a reversing switch housed in a control box 38.
  • This reversing switch being mounted in the feed circuit of the motor 14, the latter is then energized and drives, in the suitable direction, the screw 13, which causes the raising of the bearing nut 18 and thus of the movable outfit which is guided by the guide-blocks 23, 25 and 27 sliding along the column 3.
  • the operator turns the wheel 40 in the direction opposite to the preceding one until its index i is in the lowering position D, which causes the motor 14 to rotate in the opposite direction.
  • the bearing nut 18 then descends along the screw 13 and the movable assembly is lowered.
  • the position of the guide-blocks 23a and 25a, as well as their friction coefficient on the faces of the column 3 are chosen so that during descent only a predetermined fraction of the weight of the movable assembly weighs on the bearing nut 18 but that this fraction is suflicient for the movable outfit to follow faithfully the downward movement of the nut 18.
  • the operating wheel 45 may, in accordance with a variant, be repiaced by a handle or that the reversing switch may be replaced by electromagnetic contactors controlled by push-buttons, as in common practice.
  • the lifting device is further provided with a safety nut 29, the upper part of which has a cup 30c0ntaining a ball-race 31 which may roll freely.
  • a hexagonal nut -6 out in the lower part of the nut 29 engages in a corresponding opening presented by the lower part 57 of a skirt 35 fixed to the nut 18. This prevents the safety nut 29 from being driven to rotate by the screw 13 and to remain at a constant distance from the nut 18.
  • a spring 32 is wound on the body of the safety nut 29 and lightly grips it. made in the skirt 35 of the nut 18.
  • the direction of winding of this spring is such that if the screw 13 rotates in the direction corresponding to the descent, the spring tightens around the nut 29 and opposes the rotation of this nut, whereas when the screw 13 turns in the opposite direction, this spring 32 loosens and permits the free rotation of the safety nut.
  • Oneof the trunnions 19 is provided with a lug 43 around which freely pivots a lever 45', the counterweight 46of which tends to rock it in the direction of the arrow 47.
  • the lever 45 is formed with a hole 48 traversed by a rod 49 provided with two stop rings 56 and 51 serving as a safety stop for each end of travel.
  • the lower end of the rod 49 is hinged at 52 on the rocker-arm 42.
  • the lever 45 normally bears on a tube 53 attached to a plate 54, the ends of which are firmly screwed to the body of the slide 2.
  • the hole 48 has a dimeter which is sufficient to allow free passage of the rod 49 but without excessive play.
  • the spring 32 loosens and does not prevent the safety nut 29 from turning and since the friction of the balls 31 gripped between the cup 30 and a conical admission 37 of the nut 18 is less than the friction of this nut 29 on the threads of the screw 13, the nut 29 is driven to turn with the screw 13 and then behaves as a rotating stop incapable of lifting the movable assembly.
  • This feature is very desirable because the raised car can be easily unloaded, since the movable assembly may redescend to the ground but never rise.
  • the spring 32 with its tongue 33 engaged in the slot of the skirt constitutes a control device sensitive to the direction of rotation of the screw 13 and which brings about, in the case of excessive wear of the thread of the bearing nut 13, either the establishment of a mechanical transmission chain between the screw 13 andthe movable assembly, or the interruption of this transmission chain.
  • the mechanical lifting device described could also comprise a traction cable or chain or be constituted by a hydraulic device comprising a cylinder and a simple or multiple piston the relative movements of which cause the movements of the movable assembly.
  • a hydraulic device comprising a cylinder and a simple or multiple piston the relative movements of which cause the movements of the movable assembly.
  • the sharp pressure drop does not risk being the cause of a free fall of the movable assembly, the latter being braked by the guide-blocks.
  • the arms 1, rigidly connected to the slide and adapted to support the car to be lifted may be replaced by any other known lifting member such for example as a single arm, carrying at its free end a supporting member provided with direction adjustable spokes and carrying at their end a pad of soft material, the position of which is adjustable according to the supporting points of the car to be lifted.
  • the movable assembly could be guided along two lateral columns each protecting a part of the lifting device connected on the one hand to the movable assembly and on the other hand to a motor or other actuating device.
  • the movable assembly would be carried by two slides each guided along one of the lateral columns and each slide would be provided with the anti-fall safety device described constituted by the guide-blocks 23, 25 bearing on the front and rear faces of these columns.
  • a lift comprising: at least one column, a slide member movable vertically on said column, a lifting arm assembly cantilevered from said slide member, means for elevating said slide member on said column, and vertically spaced upper and lower guide blocks mounted on said slide member, said lower blocks being positioned to engage said column on the side thereof adjacent to said lifting arm assembly whereas said upper block is positioned to engage the opposite side of the column so that the guide blocks develop a couple reaction on a transverse axis through the column, said guide blocks being formed of a material having a coeflicient of friction which under the forces of the couple reaction elfects a slow descent of said assembly and the load thereon in the event said elevating means fails to carry the weight of said assembly and load.
  • said elevating means includes a rotatably driven screw suspended from the top of the column, and a bearing nut engaged on said screw for engaging said slide member.
  • said elevating means includes a safety nut and means sensitive to the rotational direction of the screw to effect relative rotation between said screw and said safety nut only when said screw rotates in a direction to lower said slide member.
  • the means sensitive to the rotational direction of said screw comprises a spring loosely engaging a cylindrical portion of said safety nut and having one end engaged with said bearing nut, whereby upon one direction of screw rotation the spring grips said safety nut to move it relative to the screw in the same manner as said bearing nut, whereas upon screw rotation in the opposite direction, said safety nut is permitted free rotation relative to said spring and said bearing nut.
  • said automatic stopping device includes means to interrupt screw rotation in response to separation of said slide member and said bearing nut whereby lowering rotation of said screw will be interrupted upon said lifting arm assembly encountering an obstacle.
  • said screw rotation interrupting means includes a rod element, an arm pivoted on a lateral spindle carried by said bearing nut and having an opening through which said rod element extends, means normally holding said arm against a stop on said slide member when the trunnions on said bearing nut are engaged in said slots on said slide member so that relative movement between the bearing nut in the slide effects angular movement of said arm to engage the rod and to interrupt screw rotation.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Transmission Devices (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
  • Basic Packing Technique (AREA)
US485721A 1965-07-22 1965-09-08 Lift for motor vehicles Expired - Lifetime US3309060A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1027065A CH437700A (fr) 1965-07-22 1965-07-22 Elévateur pour automobiles

Publications (1)

Publication Number Publication Date
US3309060A true US3309060A (en) 1967-03-14

Family

ID=4361368

Family Applications (1)

Application Number Title Priority Date Filing Date
US485721A Expired - Lifetime US3309060A (en) 1965-07-22 1965-09-08 Lift for motor vehicles

Country Status (5)

Country Link
US (1) US3309060A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (1) CH437700A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
ES (1) ES317340A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1117615A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (1) NL6511817A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3356184A (en) * 1965-06-04 1967-12-05 Bidgood William Henry Trolley
US3687234A (en) * 1969-12-08 1972-08-29 Fogautolube Sa Load lifting mechanism
US3738497A (en) * 1971-06-01 1973-06-12 Mc Donnell Douglas Corp Silent drive coat hanger rack mechanism
US3799292A (en) * 1972-01-05 1974-03-26 Astro Dynamics Inc Screw-nut and nut follower-controlled lift apparatus and components
DE2607426A1 (de) * 1976-02-24 1977-08-25 Johansson Hans Arne Valentin Hebevorrichtung
US4076216A (en) * 1975-12-16 1978-02-28 Hans Nussbaum Hoist mechanism
US4102435A (en) * 1974-02-22 1978-07-25 Gebr. Hofmann Kg Mechanical safety unit on spindle-driven lifts
US4279329A (en) * 1979-02-17 1981-07-21 Gebr. Hofmann GmbH, KG Machinenfabrik Safety device for lift equipment
EP0048978A3 (de) * 1980-09-30 1982-06-16 Siemens-Elema AB Schrauben-Mutter-Transmission zum vertikalen Verschieben einer Last (Fallsicherung)
EP0311478A1 (fr) * 1987-10-08 1989-04-12 Rockwell Automotive Body Systems-France En Abrege:Rockwell Abs-France Vérin à vis à sécurité de surcharge pour élément déplaçable, tel qu'un siège
US4875555A (en) * 1986-12-29 1989-10-24 Aktiebolaget Electrolux Patient lifting device
US4887774A (en) * 1988-08-08 1989-12-19 Eddie Phillips Safety nut assembly for backstand apparatus
FR2642742A1 (fr) * 1989-02-07 1990-08-10 Marchand Bernard Ascenseur
US4984657A (en) * 1989-07-28 1991-01-15 Burns Richard H Service lift stand apparatus for small tractors
US5036951A (en) * 1990-06-04 1991-08-06 Frangos John W Elevator-type storage system
US5174414A (en) * 1991-07-26 1992-12-29 Burns Richard H Service lift stand apparatus for small implements
US5755310A (en) * 1996-09-17 1998-05-26 Joyce/Dayton Corporation Ratchet lifting nut assembly
US5878844A (en) * 1996-11-12 1999-03-09 Hk Systems, Inc. Ball screw joint for an automated guided vehicle
US6234034B1 (en) * 1998-09-18 2001-05-22 Tsubakimoto Chain Co. Linear actuator with drop prevention mechanism
US20050103137A1 (en) * 2003-11-14 2005-05-19 Chih-Hsien Chang Screw nut assembly of linear actuation device
US20050103138A1 (en) * 2003-11-14 2005-05-19 Chen Chih H. Screw nut assembly of linear actuation device
US20060107776A1 (en) * 2004-11-19 2006-05-25 Dewert Antriebs-Und Systemtechnik Gmbh Linear drive with safety mechanism for moving a structure
EP1467124A3 (en) * 2003-04-11 2006-06-07 Umbra Cuscinetti S.p.A. Ball screw actuator for aircraft control surfaces
WO2006131949A3 (en) * 2005-06-10 2007-02-22 Bimeccanica S R L Mechanical safety mechanism for vertical or oblique movements by means of threaded bar and nut cooperating therewith
US20070062253A1 (en) * 2005-09-22 2007-03-22 Nuctech Company Limited Lifting apparatus and safety inspection system
US20070278465A1 (en) * 2006-05-30 2007-12-06 Sefac Societe Anonyme Hoisting device with a catch nut
EP1800025A4 (en) * 2004-09-29 2010-12-22 Linak As LINEAR ACTUATOR
US20120012425A1 (en) * 2009-01-23 2012-01-19 Isao Hayase Linear actuator and forklift truck
US20120193590A1 (en) * 2010-10-05 2012-08-02 Horwath William A Lifting bracket assembly including jack screw connector

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2446797A1 (fr) * 1979-01-16 1980-08-14 Villars Julio Installation de levage
SE445445B (sv) * 1981-12-08 1986-06-23 Volvo Ab Domkraft innefattande en utvendigt gengad stang och ett invendigt gengat med stangen ingripande mutterelement
GB2128739B (en) * 1982-09-15 1986-05-21 Schlumberger Electronics Ultrasonic inspection devices
GB9805891D0 (en) 1998-03-20 1998-05-13 Gradziuk David S Lifting device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1101598A (en) * 1912-09-21 1914-06-30 Henry A Weinke Lifting-jack.
US1224652A (en) * 1914-08-26 1917-05-01 Stewart Warner Speedometer Electric jack.
US1539642A (en) * 1924-06-25 1925-05-26 Arthur E Burnside Jack
US2843222A (en) * 1953-01-17 1958-07-15 Villars Julio Lifting device
US3176963A (en) * 1962-03-23 1965-04-06 Joyce Cridland Co Safety jack with auxiliary safety nut

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1101598A (en) * 1912-09-21 1914-06-30 Henry A Weinke Lifting-jack.
US1224652A (en) * 1914-08-26 1917-05-01 Stewart Warner Speedometer Electric jack.
US1539642A (en) * 1924-06-25 1925-05-26 Arthur E Burnside Jack
US2843222A (en) * 1953-01-17 1958-07-15 Villars Julio Lifting device
US3176963A (en) * 1962-03-23 1965-04-06 Joyce Cridland Co Safety jack with auxiliary safety nut

Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3356184A (en) * 1965-06-04 1967-12-05 Bidgood William Henry Trolley
US3687234A (en) * 1969-12-08 1972-08-29 Fogautolube Sa Load lifting mechanism
US3738497A (en) * 1971-06-01 1973-06-12 Mc Donnell Douglas Corp Silent drive coat hanger rack mechanism
US3799292A (en) * 1972-01-05 1974-03-26 Astro Dynamics Inc Screw-nut and nut follower-controlled lift apparatus and components
US4102435A (en) * 1974-02-22 1978-07-25 Gebr. Hofmann Kg Mechanical safety unit on spindle-driven lifts
US4076216A (en) * 1975-12-16 1978-02-28 Hans Nussbaum Hoist mechanism
DE2607426A1 (de) * 1976-02-24 1977-08-25 Johansson Hans Arne Valentin Hebevorrichtung
US4279329A (en) * 1979-02-17 1981-07-21 Gebr. Hofmann GmbH, KG Machinenfabrik Safety device for lift equipment
EP0048978A3 (de) * 1980-09-30 1982-06-16 Siemens-Elema AB Schrauben-Mutter-Transmission zum vertikalen Verschieben einer Last (Fallsicherung)
US4875555A (en) * 1986-12-29 1989-10-24 Aktiebolaget Electrolux Patient lifting device
EP0311478A1 (fr) * 1987-10-08 1989-04-12 Rockwell Automotive Body Systems-France En Abrege:Rockwell Abs-France Vérin à vis à sécurité de surcharge pour élément déplaçable, tel qu'un siège
FR2621666A1 (fr) * 1987-10-08 1989-04-14 Rockwell Cim Verin a vis a securite de surcharge pour element deplacable, tel qu'un siege
US4887774A (en) * 1988-08-08 1989-12-19 Eddie Phillips Safety nut assembly for backstand apparatus
FR2642742A1 (fr) * 1989-02-07 1990-08-10 Marchand Bernard Ascenseur
US4984657A (en) * 1989-07-28 1991-01-15 Burns Richard H Service lift stand apparatus for small tractors
WO1991001905A1 (en) * 1989-07-28 1991-02-21 Burns Richard H Service lift stand apparatus for small tractors
US5036951A (en) * 1990-06-04 1991-08-06 Frangos John W Elevator-type storage system
US5174414A (en) * 1991-07-26 1992-12-29 Burns Richard H Service lift stand apparatus for small implements
US5755310A (en) * 1996-09-17 1998-05-26 Joyce/Dayton Corporation Ratchet lifting nut assembly
US5878844A (en) * 1996-11-12 1999-03-09 Hk Systems, Inc. Ball screw joint for an automated guided vehicle
US6234034B1 (en) * 1998-09-18 2001-05-22 Tsubakimoto Chain Co. Linear actuator with drop prevention mechanism
EP1467124A3 (en) * 2003-04-11 2006-06-07 Umbra Cuscinetti S.p.A. Ball screw actuator for aircraft control surfaces
US20050103137A1 (en) * 2003-11-14 2005-05-19 Chih-Hsien Chang Screw nut assembly of linear actuation device
US20050103138A1 (en) * 2003-11-14 2005-05-19 Chen Chih H. Screw nut assembly of linear actuation device
US7152496B2 (en) * 2003-11-14 2006-12-26 Jaegar Industrial Co. Ltd. Screw nut assembly of linear actuation device
EP1800025A4 (en) * 2004-09-29 2010-12-22 Linak As LINEAR ACTUATOR
US20060107776A1 (en) * 2004-11-19 2006-05-25 Dewert Antriebs-Und Systemtechnik Gmbh Linear drive with safety mechanism for moving a structure
US7849756B2 (en) * 2004-11-19 2010-12-14 Dewert Antriebs- Und Systemtechnik Gmbh Linear drive with safety mechanism for moving a structure
EP1659298A3 (de) * 2004-11-19 2011-06-29 Dewert Antriebs- und Systemtechnik GmbH Linearantrieb
US20080197329A1 (en) * 2005-06-10 2008-08-21 Natale Brechelente Mechanical Safety Mechanism for Vertical or Oblique Movements by Means of Threaded Bar and Nut Cooperating Therewith
WO2006131949A3 (en) * 2005-06-10 2007-02-22 Bimeccanica S R L Mechanical safety mechanism for vertical or oblique movements by means of threaded bar and nut cooperating therewith
AU2006256385B2 (en) * 2005-06-10 2012-01-12 Bimeccanica S.R.L. Mechanical safety mechanism for vertical or oblique movements by means of threaded bar and nut cooperating therewith
US20070062253A1 (en) * 2005-09-22 2007-03-22 Nuctech Company Limited Lifting apparatus and safety inspection system
US8066102B2 (en) * 2005-09-22 2011-11-29 Nuctech Company Limited Lifting apparatus and safety inspection system
US20070278465A1 (en) * 2006-05-30 2007-12-06 Sefac Societe Anonyme Hoisting device with a catch nut
US20120012425A1 (en) * 2009-01-23 2012-01-19 Isao Hayase Linear actuator and forklift truck
US20120193590A1 (en) * 2010-10-05 2012-08-02 Horwath William A Lifting bracket assembly including jack screw connector
US8807532B2 (en) * 2010-10-05 2014-08-19 Whiting Corporation Lifting bracket assembly including jack screw connector

Also Published As

Publication number Publication date
GB1117615A (en) 1968-06-19
NL6511817A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1967-01-23
ES317340A1 (es) 1966-02-16
CH437700A (fr) 1967-06-15

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