US3627157A - Lifting devices - Google Patents

Lifting devices Download PDF

Info

Publication number
US3627157A
US3627157A US811329A US3627157DA US3627157A US 3627157 A US3627157 A US 3627157A US 811329 A US811329 A US 811329A US 3627157D A US3627157D A US 3627157DA US 3627157 A US3627157 A US 3627157A
Authority
US
United States
Prior art keywords
lifting
longitudinal axis
lifting device
frame
frame member
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.)
Expired - Lifetime
Application number
US811329A
Other languages
English (en)
Inventor
Herbert Frank Hamilto Blatchly
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.)
Post Office
Original Assignee
Post Office
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 Post Office filed Critical Post Office
Application granted granted Critical
Publication of US3627157A publication Critical patent/US3627157A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B66F19/00—Hoisting, lifting, hauling or pushing, not otherwise provided for
    • B66F19/005—Lifting devices for manhole covers

Definitions

  • the covers of manholes providing access to underground chambers have to be lifted from time to time to permit personnel to enter the chamber.
  • the covers are heavy because they are designed to withstand any load that may be applied to them by traffic on the carriageway. Consequently, the covers are difficult to lift.
  • Lifting devices previously proposed have not been entirely satisfactory, some are bulky and heavy and require a two-man team for effective use, in addition, some devices have to be assembled before use and dismantled afterwards.
  • a lifting device for lifting a load comprises in combination, a lifting beam having a longitudinal axis, a frame member, means for rotating the lifting beam about its longitudinal axis, a pivotal coupling interconnecting said means and said frame member, a first arm extending from the beam and fixed relative to the said longitudinal axis, said first arm being pivotally attached to said frame member, two further arms extending by equal distances from the beam, said further arm being spaced apart along the beam and fixed relative to the said longitudinal axis, and, rotatable with the beam, at least one point of attachment for attaching a load to the device.
  • the means for rotating the beam includes a hydraulically operated jack with a piston connected to the beam by another arm or arms extending at right angles to the beam.
  • the spaced arms have wheels rotatably mounted upon them adjacent to their outermost ends to facilitate the lifting action and to enable the device to be used to move an article which it has lifted.
  • the article may be lifted by one or more hooks mounted upon the beam for rotation therewith.
  • the cross section of the beam in a plane transverse to its longitudinal axis is preferably noncircular, in which case the hooks are attached to or form part ofsleeves slidably mounted upon the beam.
  • the constraining linkage may comprise a frame pivotally attached at one end to the beam and pivotally mounted upon the hydraulic jack.
  • the frame may have a wheel mounted upon it to facilitate movement of the device.
  • the point of pivotal attachment of the frame of the jack may be adjustable in such manner as to control the height of the hooks above the ground.
  • FIG. I is a plan view of the embodiment
  • FIG. 2 and 3 are front and side elevation respectively of the embodiment, FIG. 3 also showing the device in a typical position at the commencement of lifting.
  • the lifter comprises a lifting beam I of square cross section transverse to its length and at the ends of which are fixed, as by welding for example, the ends of pairs of radius arms 2. Between each pair of radium arms at the ends thereof remote from beam 1, wheels 3 are rotatably mounted.
  • a further pair of radius arms 4 which extends from the beam at an angle of about 135 with respect to the pairs of arms 2 as can be seen from FIG. 3.
  • One end of a piston rod 5 is pivotally secured between the outer ends of the arms 4 by means of a pivot pin 6.
  • the piston rod 5 forms part of an hydraulically operated jack whose cylinder is shown at 7.
  • the cylinder 7 has an enlarged reservoir portion 8 at one end containing a second piston whose piston rod 9 is pivoted to a handle 10 itself pivoted at one end to a lug it on the reservoir portion 8.
  • Projecting from the reservoir portion 8 is a rod 12 with a knurled know 12a which controls the release of hydraulic liquid from the interior of cylinder 7 to the interior of the reservoir portion b.
  • a clamp 13 Slidable along the cylinder 7 is a clamp 13 having projections 1% between which is pivotally mounted at 13b a frame M consisting of rods 15 which extend forwardly to the beam I from a housing 116 having bifurcations 17 which receive the ends of the rods l5 and an angled portion 18 to whose end is fixed a castor tube 19 containing the mounting spindle of a castor wheel 20.
  • the ends of the rods 15 remote from the housing 116 carry castor tubes 21 by means of which the rods 15, which diverge outwardly as seen in FIG. 1, are pivotally secured by pivot pins 22 between further pairs of radius arms 22a fixed to the beam ll.
  • Slidably mounted upon the beam 1 are two sleeves 25, both of square internal cross section, carrying books 26.
  • the sleeves are arranged one on each side of the pair 4 of radius arms.
  • the eyes of the hooks 26 are aligned with the pivot pins 22, this ensuring a vertical lifting action.
  • the piston rod 5 Prior to use, the piston rod 5 is: fully retracted into the cylinder 7 as indicated in FIG. 3 in chain-dotted lines.
  • the clamp 13 is positioned and locked in a position adjacent that end of the cylinder 7 adjacent portion 8.
  • Lifting keys are then inserted in the sockets provided in the manhole cover, and the apparatus is maneuvered into a location over the cover in which the beam straddles the latter with the wheels 3 on the ground at the sides of the cover and with the books 26 (previously moved to appropriate positions along the beam ll) engaged in the lifting keys.
  • the positions of the various components of the device, when the latter is in the location just referred to, are those shown in chain-dotted lines in F163.
  • the hooks 26 are not low enough to engage the keys when the parts of the device are in the chain-dotted positions.
  • the clamp 13 is loosened by means of the tommy bar 24 and the clamp together with the frame 114 is moved towards the beam 1 thereby lowering the hooks 26 to a position in which they engage the lifting keys. Clamp 13 is then. locked in position.
  • an operator pumps the handle 10 to force hydraulic liquid into the cylinder 7 and cause the piston rod to extend from the cylinder.
  • the movement of the piston rod acting through the pairs 2 and 4 of radius anns, causes the wheels 3 to move along the ground from the position shown in chain-dotted lines in FIG. 3 to that shown in full lines and lifting beam to move upwardly.
  • the books 26 also move upwardly with the beam and follow a line of movement indicated by the chain-dotted lines 27. This upward movement lifts the manhole cover by an amount sufficient to clear the ground and the device with the manhole cover suspended from the hooks 26 can then be wheeled to a position clear of the manhole.
  • the device with the suspended cover is positioned over the manhole and the cover lowered by allowing hydraulic liquid to flow out of the cylinder 7 to the reservoir portion 8 by operation of the release rod mentioned above.
  • the weight of the cover returns the components of the device, in a controlled manner, to the chain-dotted position of FIG. 3 and the hooks 26 can then be disengaged from the lifting keys.
  • the apparatus can be used with the several difierent types of lifting keys used for different types of manhole cover and, in some cases, the keys are used to break the seal between the manhole cover and its frame before being used to raise the cover.
  • the cross section of'the beam normal to its length need not be square, other shapes both noncircular and circular can be .used. If the cross section is circular then the lifting hooks must combination a lifting beam 1 having a longitudinal axis, a
  • first arm means 220 extending radially from said beam 1 and fixed relatively to said longitudinal axis and pivotally attached at 22 to said frame member 14-21
  • second and third arm means 2, 2 fixed to the beam 1 for rotation therewith and spaced apart along the longitudinal axis of the beam
  • the second and third arms means 2,2 extending radially from the beam 1 to support the latter above ground at a height determined by the angular position of the beam
  • attachment means 26 rotatable with said beam providing at least one point of attachment for attaching a load to the beam.
  • said frame member 14-21 comprises bifurcations 15 extending from said pivotal coupling 13a-13b toward said beam 1
  • the first arm means comprises two parallel arms 22a of equal length spaced apart along said beam 1 and pivotally attached to said bifurcations 15 at 22, respectively
  • said attachment means comprises a plurality of lifting attachments 25-26 mounted upon said beam 1 so as to be rotatable therewith, which have lifting surfaces or hooks 26 aligned with thepivot pins 22, i.e., lying along a line joining the points 22 of pivotal attachment of the bifurcations 15 to said first arm means 22a, as shown in FIGS.
  • wheels 3 are mounted upon said second and third arm means 2,2, at their outer ends for facilitating rotation of said beam and movement of the device along the ground; the pivotal coupling means 13a-13b is adjustable in position towards and away from said beam 1 by loosening the clamp screw 24 and sliding the same along the member 7; and a front wheel is rotatably mounted upon the frame member 14-21, as best shown in FIG. 3.
  • a lifting device comprising in combination a lifting beam, spaced arms fixed to the beam and extending away from the longitudinal axis of the beam, wheels rotatably mounted upon said spaced arms at the outermost of the latter, means for rotating the beam about its longitudinal axis, a linkage comprising a frame pivotally attached to the beam and to the said means, the point of pivotal attachment of the frame to the said means being adjustable in position towards and away from the beam, a ground wheel rotatably mounted upon said frame, I
  • a lifting device for lifting a load comprising, in combination,
  • a lifting beam 1 having a longitudinal axis
  • first arm means (220) extending radially from said beam (1) and fixed relatively to said longitudinal axis and pivotally attached (at 22) to said frame member (14-21)
  • second and third arm means (2, 2,) fixed to the beam (1) for rotation therewith and spaced apart along the longitudinal axis of the beam
  • the second and third arm means (2, 2,) extending radially from the beam (1) to support the latter above ground at a height determined by the angular position of the beam
  • attachment means (26) rotatable with said beam providing at least one point of attachment for attaching a load to the beam.
  • said frame member (14-21) comprises bifurcations (15) extending from said pivotal coupling (1 3a-13b) toward said beam (1 and wherein i. said first arm means (22a) comprises two parallel arms of equal length spaced apart along said beam (1) and pivotally attached to said bifurcations, respectively.
  • said attachment means 26 comprises a plurality of lifting attachments (25-26) mounted upon said beam (1) so as to be rotatable therewith, said lifting attachments having lifting surfaces (26) lying along a line joining the respective points (22) of pivotal attachment of said bifurcations (15) to said first arm means (1).
  • wheels (3) rotatably mounted upon said second and third arm means (2,2) at their outer ends for facilitating rotation of said beam and movement of the device along the ground.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
US811329A 1968-07-01 1969-03-28 Lifting devices Expired - Lifetime US3627157A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB31281/68A GB1268352A (en) 1968-07-01 1968-07-01 Improvements in or relating to lifting devices

Publications (1)

Publication Number Publication Date
US3627157A true US3627157A (en) 1971-12-14

Family

ID=10320777

Family Applications (1)

Application Number Title Priority Date Filing Date
US811329A Expired - Lifetime US3627157A (en) 1968-07-01 1969-03-28 Lifting devices

Country Status (4)

Country Link
US (1) US3627157A (enrdf_load_stackoverflow)
DE (1) DE1919726C2 (enrdf_load_stackoverflow)
FR (1) FR2012099A1 (enrdf_load_stackoverflow)
GB (1) GB1268352A (enrdf_load_stackoverflow)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4043403A (en) * 1976-03-23 1977-08-23 Chromalloy American Corporation Agricultural implement frame elevating mechanism
US4317489A (en) * 1978-11-27 1982-03-02 Deere & Company Ground-working implement and lift linkage therefor
US5387058A (en) * 1993-03-31 1995-02-07 Smoot Company Airlift railcar discharge adaptor
US5575595A (en) * 1993-03-31 1996-11-19 Smoot Co. Low profile parallel railcar discharge adaptor
WO2007022387A2 (en) 2005-08-18 2007-02-22 Sunrise Medical Hhg Inc. Midwheel drive wheelchair with independent front and rear suspension
US20110083913A1 (en) * 2009-10-09 2011-04-14 Invacare Corporation Wheelchair suspension
US20120317799A1 (en) * 2011-06-14 2012-12-20 Timothy Selby Method and device for removal of vertical manway cover
US8851214B2 (en) 2010-07-15 2014-10-07 Permobil Ab Electric mid-wheel drive wheelchair
US8910975B2 (en) 2007-02-14 2014-12-16 Invacare Corporation Wheelchair with suspension
US8925943B2 (en) 2001-10-10 2015-01-06 Invacare Corp. Wheelchair suspension
US9149398B2 (en) 2000-10-27 2015-10-06 Invacare Corporation Obstacle traversing wheelchair
US9290370B1 (en) 2010-09-13 2016-03-22 Hlbp Design Corp. Hydraulic lifting apparatus
US9301444B2 (en) * 2014-05-02 2016-04-05 Deere & Company Rotary cutting deck height of cut adjustment mechanism
US9308143B2 (en) 2012-02-15 2016-04-12 Invacare Corporation Wheelchair suspension
US9364377B2 (en) 2002-10-25 2016-06-14 Invacare Corporation Suspension for wheeled vehicles
US9603762B2 (en) 2007-02-08 2017-03-28 Invacare Corporation Wheelchair suspension
US9725289B2 (en) 2010-09-13 2017-08-08 Hlbp Design Corp. Hydraulic lifting apparatus
CN110040670A (zh) * 2019-05-14 2019-07-23 济南热力集团有限公司 一种用于管道井盖开启的便携式液压装置
US11213441B2 (en) 2002-10-25 2022-01-04 Invacare Corporation Suspension for wheeled vehicles
US11903887B2 (en) 2020-02-25 2024-02-20 Invacare Corporation Wheelchair and suspension systems

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2497185A1 (fr) * 1980-12-31 1982-07-02 Girardot Bernard Dispositif pour decoller, soulever et deplacer un objet dispose a plat
DE3148385A1 (de) * 1981-12-07 1983-06-09 Max 8200 Rosenheim Haas Wagenheber od.dgl. mit scherenartig angeordneten stuetzschenkeln
FR2528817A1 (fr) * 1982-06-16 1983-12-23 Lafeuille Marc Dispositif de levage de plaque
GB2136363B (en) * 1983-03-16 1986-09-17 Petroleum Equipment Trading Co Trolley
AT380044B (de) * 1983-06-06 1986-03-25 Koessler Johann Abschluss fuer schaechte, z.b. auf fahrbahnen und schluessel hiefuer
GB2311055B (en) * 1996-03-19 1999-05-12 Westside Investments Limited A manhole cover lifter
GB2370560B (en) * 2000-11-16 2004-11-17 T W Engineering Co Ltd Lifting device
CN109941892B (zh) * 2019-03-29 2020-04-10 林向亮 一种市政雨水箅子提起装置

Cited By (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4043403A (en) * 1976-03-23 1977-08-23 Chromalloy American Corporation Agricultural implement frame elevating mechanism
US4317489A (en) * 1978-11-27 1982-03-02 Deere & Company Ground-working implement and lift linkage therefor
US5387058A (en) * 1993-03-31 1995-02-07 Smoot Company Airlift railcar discharge adaptor
US5575595A (en) * 1993-03-31 1996-11-19 Smoot Co. Low profile parallel railcar discharge adaptor
US9987177B2 (en) 2000-10-27 2018-06-05 Invacare Corporation Obstacle traversing wheelchair
US9149398B2 (en) 2000-10-27 2015-10-06 Invacare Corporation Obstacle traversing wheelchair
US8925943B2 (en) 2001-10-10 2015-01-06 Invacare Corp. Wheelchair suspension
US9370455B2 (en) 2001-10-10 2016-06-21 Invacare Corporation Wheelchair suspension
US10512572B2 (en) 2002-10-25 2019-12-24 Invacare Corporation Suspension for wheeled vehicles
US9364377B2 (en) 2002-10-25 2016-06-14 Invacare Corporation Suspension for wheeled vehicles
US9925100B2 (en) 2002-10-25 2018-03-27 Invacare Corporation Suspension for wheeled vehicles
US11213441B2 (en) 2002-10-25 2022-01-04 Invacare Corporation Suspension for wheeled vehicles
US20070039766A1 (en) * 2005-08-18 2007-02-22 Jackson Mark A Midwheel drive wheelchair with independent front and rear suspension
US7896394B2 (en) * 2005-08-18 2011-03-01 Sunrise Medical Hhg, Inc. Midwheel drive wheelchair with independent front and rear suspension
WO2007022387A2 (en) 2005-08-18 2007-02-22 Sunrise Medical Hhg Inc. Midwheel drive wheelchair with independent front and rear suspension
WO2007022387A3 (en) * 2005-08-18 2007-06-21 Sunrise Medical Hhg Inc Midwheel drive wheelchair with independent front and rear suspension
US10265229B2 (en) 2007-02-08 2019-04-23 Invacare Corporation Wheelchair suspension
US11819464B2 (en) 2007-02-08 2023-11-21 Invacare Corporation Wheelchair suspension
US11464687B2 (en) 2007-02-08 2022-10-11 Invacare Coporation Wheelchair suspension
US10912690B2 (en) 2007-02-08 2021-02-09 Invacare Corporation Wheelchair suspension
US9603762B2 (en) 2007-02-08 2017-03-28 Invacare Corporation Wheelchair suspension
US11535078B2 (en) 2007-02-14 2022-12-27 Invacare Corporation Stability control system
US9346335B2 (en) 2007-02-14 2016-05-24 Invacare Corporation Stability control system
US10532626B2 (en) 2007-02-14 2020-01-14 Invacare Corporation Stability control system
US11097589B2 (en) 2007-02-14 2021-08-24 Invacare Corporation Stability control system
US8910975B2 (en) 2007-02-14 2014-12-16 Invacare Corporation Wheelchair with suspension
US9827823B2 (en) 2007-02-14 2017-11-28 Invacare Corporation Stability control system
US11850906B2 (en) 2007-02-14 2023-12-26 Invacare Corporation Stability control system
US9913768B2 (en) 2009-10-09 2018-03-13 Invacare Corporation Wheelchair suspension
US11096845B2 (en) 2009-10-09 2021-08-24 Invacare Corporation Wheelchair suspension
US11857470B2 (en) 2009-10-09 2024-01-02 Invacare Corporation Wheelchair suspension
US20110083913A1 (en) * 2009-10-09 2011-04-14 Invacare Corporation Wheelchair suspension
US9010470B2 (en) 2009-10-09 2015-04-21 Invacare Corporation Wheelchair suspension
US8851214B2 (en) 2010-07-15 2014-10-07 Permobil Ab Electric mid-wheel drive wheelchair
US9320661B2 (en) 2010-07-15 2016-04-26 Permobil Ab Electric mid-wheel drive wheelchair
US9725289B2 (en) 2010-09-13 2017-08-08 Hlbp Design Corp. Hydraulic lifting apparatus
US9290370B1 (en) 2010-09-13 2016-03-22 Hlbp Design Corp. Hydraulic lifting apparatus
US8939434B2 (en) * 2011-06-14 2015-01-27 Timothy Selby Method and device for removal of vertical manway cover
US20120317799A1 (en) * 2011-06-14 2012-12-20 Timothy Selby Method and device for removal of vertical manway cover
US11234875B2 (en) 2012-02-15 2022-02-01 Invacare Corporation Wheelchair suspension
US9308143B2 (en) 2012-02-15 2016-04-12 Invacare Corporation Wheelchair suspension
US9700470B2 (en) 2012-02-15 2017-07-11 Invacare Corporation Wheelchair suspension
US10434019B2 (en) 2012-02-15 2019-10-08 Invacare Corporation Wheelchair suspension
US9301444B2 (en) * 2014-05-02 2016-04-05 Deere & Company Rotary cutting deck height of cut adjustment mechanism
CN110040670A (zh) * 2019-05-14 2019-07-23 济南热力集团有限公司 一种用于管道井盖开启的便携式液压装置
CN110040670B (zh) * 2019-05-14 2024-05-31 济南热力集团有限公司 一种用于管道井盖开启的便携式液压装置
US11903887B2 (en) 2020-02-25 2024-02-20 Invacare Corporation Wheelchair and suspension systems

Also Published As

Publication number Publication date
GB1268352A (en) 1972-03-29
DE1919726C2 (de) 1982-10-21
DE1919726A1 (de) 1970-03-05
FR2012099A1 (enrdf_load_stackoverflow) 1970-03-13

Similar Documents

Publication Publication Date Title
US3627157A (en) Lifting devices
US3058607A (en) Ladder racks
US3465904A (en) Adjustable boom for material handling equipment
US4266819A (en) Grapple apparatus
US2718312A (en) Material handling apparatus
US5114299A (en) Attachment for a prime mover
US3375021A (en) Counterweight removal device
US4529215A (en) Hydraulic cylinder safety lock
US3163304A (en) Scoop and loader attachment for tractors
US4257730A (en) Stand device for boom-type working implements
US3169650A (en) Transport arrangement for mobile excavator
US2855111A (en) Outrigger supports for mobilized log yarders and loaders, and the like
US4060259A (en) Implement transporting device
ES2247203T3 (es) Aparato tipicamente capaz de transformar un bastidor montado en orugas en una maquina para el tendido de tubos.
GB2060557A (en) Lifting device
US3746193A (en) Logging machine
US3633776A (en) Hydraulically controlled flatbed trailer
US2545739A (en) Tractor-drawn scraper
US3795330A (en) Counterweight suspension device
US2415515A (en) Combined digging and loading device for tractors or the like
US2538102A (en) Loader mechanism for tractors
US4242034A (en) Quick-release coupling
EP0022853B1 (en) Two way side dump bucket attachment for front end loader
US3139199A (en) Earth moving equipment
US3122250A (en) Container handling apparatus