EP0373392A1 - Grue hydraulique portable - Google Patents

Grue hydraulique portable Download PDF

Info

Publication number
EP0373392A1
EP0373392A1 EP89121557A EP89121557A EP0373392A1 EP 0373392 A1 EP0373392 A1 EP 0373392A1 EP 89121557 A EP89121557 A EP 89121557A EP 89121557 A EP89121557 A EP 89121557A EP 0373392 A1 EP0373392 A1 EP 0373392A1
Authority
EP
European Patent Office
Prior art keywords
legs
mast
crane
sockets
support members
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Withdrawn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
EP89121557A
Other languages
German (de)
English (en)
Inventor
James G. Ballard
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.)
Hein Werner Corp
Original Assignee
Hein Werner Corp
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 Hein Werner Corp filed Critical Hein Werner Corp
Publication of EP0373392A1 publication Critical patent/EP0373392A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • B66C23/18—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 specially adapted for use in particular purposes
    • B66C23/36—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 specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
    • B66C23/48—Manually-movable jib cranes for use in workshops

Definitions

  • the invention relates to portable hydraulic cranes of the type used in automotive maintenance and repair and in other similar applications.
  • Portable hydraulically operated cranes are commonly used in automotive repair shops and service stations, as well as by individuals in home auto repair and are provided by rental agencies for home automotive repair.
  • This invention provides an improved portable crane with legs which can be either readily removed, or alternatively, pivoted to a folded storage position.
  • the crane also includes a means for supporting the crane boom such that it can be either readily removed, or alternatively, folded to a storage position.
  • the crane embodying the invention is also provided with wheels which facilitate movement of the crane and can serve as dolly wheels when the folded crane is tilted back for movement. No special tools are needed for disassembly of the crane nor folding of the crane to a folded storage position, and the locks, pins and the like which hold the crane parts in assembled position are built in or otherwise retained to reduce the likelihood of the user substituting inferior or weaker parts.
  • this invention provides a crane having a generally trapezoidal base or frame on which a mast is mounted.
  • a boom is supported by the upper end of the mast.
  • Each of the diverging sides of the base or frame includes a tube or socket which houses an end of a tubular leg assembly in telescoping relation.
  • a lock member or latch is mounted in the socket and selectively interferes with removal of the tubular leg from the socket by engaging a bracket fixed inside the tubular leg. The latch can be selectively moved to a non-interfering position by manually depressing an actuator tab to permit removal of the telescoping leg from the socket.
  • bracket in the tubular leg includes a hooked end which can engage the latch mounted in the socket and serve as a pivot supporting the leg such that it can swing upwardly more than 90° to a storage position.
  • the mast is a tube which fits in a socket on the base, and side braces are connected to the mast and frame by simple pins which can't be lost.
  • the crane can be folded into the storage mode by folding the legs and boom to positions generally parallel to the mast.
  • the trapezoidal frame has a wheel at each corner, and the folded crane can be easily moved with the rear wheels functioning as a dolly.
  • the portable hydrauiic crane embodying the invention includes a generally trapezoidal frame or base 10 including two diverging tubes or sockets 12, 14 each being generally square in cross section and being joined by a U-shaped bracket 16.
  • the U-shaped bracket 16 has opposite ends welded to the rearward ends of the tubes 12 and 14.
  • the tubes 12 and 14 also each include a forward portion, and the top of each forward portion is cut away so as to provide an upwardly opening channel.
  • An end portion of a square tubular leg 18 is housed in telescoping relation in each socket 12, 14.
  • Square tubular leg extensions 46 are telescopingly housed in the ends of each leg 18 and provide for adjustment of the leg length.
  • a caster wheel 20 is fixed to the outer or distal end of the inner telescoping leg 46 to support the outer end of the leg 46 and to facilitate movement of the crane.
  • a square tubular cross member 22 interconnects the two sockets 12 and 14, and each of the two rear corners formed by bends 17 in bracket 16 carry a downwardly extending support pin 24 to which the rear caster wheels 26 are connected.
  • a bracket 28 fixed inside the lower portion of the end of the leg 18 cooperates with a latch 34 housed in the socket and functions to releaseably prevent removal of the leg 18 from the socket unless the latch 34 is moved to a position permitting release of the leg 18.
  • the latch member 34 has an end 36 which can be manually depressed to pivot latch 34 in the counter clockwise direction as shown in Fig. 5 about pivot 38 to raise a keeper pin 32 fixed to the opposite end of the lever 34, and such that a hooked end 30 of bracket 28 can pass under keeper pin 32 when telescoping leg 18 is pulled out of the socket.
  • each leg 18 When the leg 18 is moved out of the socket to the position shown in Fig. 6 wherein the hook 30 engages the keeper pin 32, the leg 18 can then be pivoted up and back to the position shown in the phantom.
  • the top portion of the outward end of each socket 12 and 14 is cut away to permit such pivotal movement of leg 18, and in this position each leg 18 is in an upstanding position between the spaced side walls of the outer end of the sleeve.
  • a hole 41 in the top surface of the inner end of each leg 18 will house a pin 42 welded to the top of the socket 12 or 14, and the pin 42 will restrain the leg 18 against lateral movement and keep it in position adjacent the mast.
  • the tubular cross member 22 has an upper surface supporting an upwardly extending socket 50 secured thereto and adapted to house the lower end of a mast 52.
  • the mast 52 extends generally vertically upwardly from socket 50 but at a rearward angle such that the upper end of the mast is approximately over the rear of the trapezoidal base.
  • the mast 52 is supported against lateral movement by braces or straps 54 having lower ends secured to rearward ends of the sockets 12 and 14 and upper ends engaging the upper end of the mast 52.
  • a pin 56 projects from the lower end of each brace 54 and is adapted to be received in a tube 55 welded to the bottom of a rearward portion of each socket 12 and 14.
  • the upper end of the mast 52 includes a cross tube 57 (Fig.
  • the release pin 60 extends through the plate 62 at the top of the mast 52.
  • the release pin 60 comprises an inverted, U-shaped bar having a bite portion 64 and legs slideably housed in bores provided in an end plate 62 of the mast, and the ends of the leg portions of pin 60 projecting through holes in the tube 57.
  • the lower portion of each leg of the "U” includes a cross pin 66, and a spring 68 is compressed between the cross pin and the end plate 62.
  • the conical ends 59 of the brace pins 58 push the release pin 60 upwardly until the ends of the legs of the release pin 60 can drop into the grooves 70 in the shanks of each pin 58 to lock the brace 54 in place.
  • the legs can be extended, that is, the telescoping leg 46 telescopes inside the leg 18 (which is received in socket 14).
  • the leg 18 has a stiffening truss 72 fixed on the bottom of the leg.
  • the top of the leg 18 is provided with a pin 74 which is spring loaded downwardly into engagement with one of the holes 75 in the top surface of the inner leg 46 to provide convenient indexed locations for pinning the inner leg.
  • the crane embodying the invention further includes a boom 76 comprising an inner square tube 78 and an outer square tube 80.
  • One end of the boom assembly is pivotably connected to the upper end of the mast 52 by a pivot pin 82.
  • the upper end of the mast supports a pair of forwardly projecting spaced apart brackets 85, the forward ends of the brackets 85 supporting a pin 82.
  • a hook 87 is fixed to the bottom portion of the end of the boom and engages the pin 82.
  • the boom 76 is further supported by a hydraulic ram 84 pivotally connected at its lower end by a support 86 to the mast 52 and having an upper end releaseably supporting a bracket 88 of the boom.
  • the ram 84 can be extended to elevate the free end of the boom 76 and to lift a load connected to the boom via the chain and the hook 90.
  • the inner tube portion 78 of the telescoping boom is housed in the boom portion 80 and is extendable in the same manner as the legs 46 are extendible.
  • a spring loaded lock pin assembly 92 on the end of boom portion 80 provides means for locking the inner telescoping boom portion 78 in a selected telescoping position.
  • the crane can be folded for temporary storage with the boom 76 lowered into a position substantially parallel with the mast, and with the legs folded upwardly to positions on opposite sides of the mast 52 and generally parallel to the mast.
  • the upper end of the ram 84 is disconnected from the boom 76 and is positioned against the mast 52.
  • the boom 76 is lowered over the ram 84 such that it is parallel to the mast 52.
  • the next step is to pivot the legs 18 up to their upwardly extending inactive position.
  • the tab 36 of latch 34 is depressed to raise the keeper pin 32 to a position out of the way and to permit the leg assembly 18 to be pulled outwardly with respect to the socket 12 or 14 a little, at which time the tab 36 is then released and the keeper pin 32 goes back in place to be engaged by the hook 30 as the leg 18 is pulled out farther.
  • the leg 18 is then free to pivot upwardly (using the keeper pin 32 as a pivot) to the upwardly extending slightly rearwardly tilted position. Due to the non-parallel nature of the sides of the trapezoidal frame, the folded legs converge towards the center so as to lie on either side of the mast. At this point, chains 92 (Fig. 3) having hooks or clips at their ends can be hooked to the rings 77 of pins 74 to keep the legs 18 from falling forward accidentally.
  • the crane is a very compact structure and it can be stored in that manner or it can be wheeled around very easily on the four caster wheels.
  • the crane can also tilt rearwardly onto the small wheels 26 so the folded up crane can be handled as if it were on a dolly. It will be noted that there are no bolts used. Everything is attached to the assembly and some parts are spring loaded into position. There is virtually no risk of substitution of weak for strong parts, etc.
  • the crane embodying the invention can be easily disassembled without tools. This is of substantial advantage if the portable crane is to be transported.
  • the crane can be easily disassembled so that it can be loaded into a vehicle and then easily reassembled without use of tools.
  • the boom assembly 76 can be removed by lifting upwardly on the boom 76 so that the ram 84 can be pivoted rearwardly to a position against the mast.
  • the boom 76 can then be pivoted downwardly to a generally vertical position and then lifted upwardly such that hook 87 is lifted away from pivot pin 82.
  • the legs 18 can be removed from sockets 12 and 14 by lifting the keeper 32 out of the way by depressing tab 36.
  • the mast assembly can be disassembled by pulling the U-shaped pin 60 upwardly and disconnecting the pins 58 at the upper end of the mast. The pins 56 at the lower ends of brackets 54 are then removed. The mast 52 can then be pulled upwardly out of the socket 50.
  • All the parts are rugged and simple and the entire device can be easily assembled. All parts are designed to be easily transported in a vehicle so the renter of the equipment can easily get the portable crane to the garage for use.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
EP89121557A 1988-12-08 1989-11-21 Grue hydraulique portable Withdrawn EP0373392A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US28149088A 1988-12-08 1988-12-08
US281490 1988-12-08

Publications (1)

Publication Number Publication Date
EP0373392A1 true EP0373392A1 (fr) 1990-06-20

Family

ID=23077520

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89121557A Withdrawn EP0373392A1 (fr) 1988-12-08 1989-11-21 Grue hydraulique portable

Country Status (2)

Country Link
EP (1) EP0373392A1 (fr)
CA (1) CA1324989C (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5195726A (en) * 1991-07-03 1993-03-23 Agc Research And Development Corp. Portable luggage carrier
GB2289457A (en) * 1994-05-10 1995-11-22 Arjo Ltd Invalid hoist
WO2012098385A1 (fr) * 2011-01-17 2012-07-26 Granada Material Handling Limited Grue d'entretien pour une utilisation au niveau de zones en hauteur
CN108423575A (zh) * 2018-04-24 2018-08-21 叶爱丹 一种建筑用可折叠式小型吊机
CN112010192A (zh) * 2020-08-29 2020-12-01 温州宇岚科技有限公司 一种智能化车间物料吊装装置
IT202100015746A1 (it) * 2021-06-16 2022-12-16 Pr A Im S R L Sistema di sollevamento rotoli di reggetta
CN119929686A (zh) * 2024-12-18 2025-05-06 武汉船用机械有限责任公司 起重机
WO2026008599A1 (fr) * 2024-07-03 2026-01-08 Bredie Grue de chantier portable et mobile sous charge

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR59878E (fr) * 1949-12-22 1954-08-23 Perfectionnements aux dispositifs de manutention de bobines
US2939590A (en) * 1958-03-07 1960-06-07 Harry M Henry Work hoist
US3367512A (en) * 1966-01-10 1968-02-06 Owatonna Tool Co Floor crane
DE2003769A1 (de) * 1969-01-21 1970-11-19 Tidswell Anthony Clifford Zusammenlegbarer Kran
US3825132A (en) * 1973-05-11 1974-07-23 World Wide Real Estate Investm Towing and lifting apparatus
US4190233A (en) * 1978-06-30 1980-02-26 Godfrey Charles J B Jack
US4508233A (en) * 1983-01-18 1985-04-02 Helms Thomas G Compact heavy duty lifting crane
US4669703A (en) * 1985-07-31 1987-06-02 Hawkins Joel W Wheeled hoist
US4749324A (en) * 1987-03-30 1988-06-07 Arthur Rulison Apparatus for lifting and positioning construction material

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR59878E (fr) * 1949-12-22 1954-08-23 Perfectionnements aux dispositifs de manutention de bobines
US2939590A (en) * 1958-03-07 1960-06-07 Harry M Henry Work hoist
US3367512A (en) * 1966-01-10 1968-02-06 Owatonna Tool Co Floor crane
DE2003769A1 (de) * 1969-01-21 1970-11-19 Tidswell Anthony Clifford Zusammenlegbarer Kran
US3825132A (en) * 1973-05-11 1974-07-23 World Wide Real Estate Investm Towing and lifting apparatus
US4190233A (en) * 1978-06-30 1980-02-26 Godfrey Charles J B Jack
US4508233A (en) * 1983-01-18 1985-04-02 Helms Thomas G Compact heavy duty lifting crane
US4669703A (en) * 1985-07-31 1987-06-02 Hawkins Joel W Wheeled hoist
US4749324A (en) * 1987-03-30 1988-06-07 Arthur Rulison Apparatus for lifting and positioning construction material

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5195726A (en) * 1991-07-03 1993-03-23 Agc Research And Development Corp. Portable luggage carrier
GB2289457A (en) * 1994-05-10 1995-11-22 Arjo Ltd Invalid hoist
GB2289457B (en) * 1994-05-10 1997-11-19 Arjo Ltd Invalid hoist
US5784729A (en) * 1994-05-10 1998-07-28 Arjo Limited Invalid hoist
WO2012098385A1 (fr) * 2011-01-17 2012-07-26 Granada Material Handling Limited Grue d'entretien pour une utilisation au niveau de zones en hauteur
CN108423575A (zh) * 2018-04-24 2018-08-21 叶爱丹 一种建筑用可折叠式小型吊机
CN112010192A (zh) * 2020-08-29 2020-12-01 温州宇岚科技有限公司 一种智能化车间物料吊装装置
IT202100015746A1 (it) * 2021-06-16 2022-12-16 Pr A Im S R L Sistema di sollevamento rotoli di reggetta
WO2026008599A1 (fr) * 2024-07-03 2026-01-08 Bredie Grue de chantier portable et mobile sous charge
FR3164198A1 (fr) * 2024-07-03 2026-01-09 Bredie Grue de chantier portable et mobile sous charge
CN119929686A (zh) * 2024-12-18 2025-05-06 武汉船用机械有限责任公司 起重机

Also Published As

Publication number Publication date
CA1324989C (fr) 1993-12-07

Similar Documents

Publication Publication Date Title
US5076448A (en) Portable hydraulic crane
US4881864A (en) Boom hoist for attachment to a trailer hitch drawbar
US6460653B1 (en) Combined trailer and hunting stand operable between elevated and collapsed positions
US6273435B1 (en) Trailer with non-tilting movable bed
US3797672A (en) Apparatus attachable to a truck body or the like for use for hoisting or lifting, or as an elevated support
US3521860A (en) Knock-down hoist
US7070059B1 (en) Portable hoist for vehicle
US4462569A (en) Apparatus for jacking up and supporting a structure
US6471220B1 (en) Cart and stand for supporting and transporting metal working apparatus
US4334668A (en) Portable foldable hoist
US20050129494A1 (en) Adjustable forklift adapter and method
US11332208B2 (en) Device for removing, storing and installing convertible SUV hardtops from the rear or side
US4265585A (en) Loading device for vehicle beds
US5634759A (en) Raising and lowering columns
US5028198A (en) Collapsible full reach truck bed hoist
US6692142B1 (en) Apparatus, method, and system of a moveable lighting
CA1324989C (fr) Grue hydraulique tractable
US8011035B2 (en) Stretcher
US20020048504A1 (en) ATV mechanical lift
US4944648A (en) Trailer assembly
US4252492A (en) Detachable lift unit for pickup trucks
US5105913A (en) Tilt mechanism for portable hoist
GB2061218A (en) A manhole cover lifting device
GB2104875A (en) Container handling device
CA2707527C (fr) Kit de montage

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19900725

17Q First examination report despatched

Effective date: 19910819

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19940621