EP0047726A3 - A safety device in hydraulically operated working-platform elevators - Google Patents

A safety device in hydraulically operated working-platform elevators Download PDF

Info

Publication number
EP0047726A3
EP0047726A3 EP81850151A EP81850151A EP0047726A3 EP 0047726 A3 EP0047726 A3 EP 0047726A3 EP 81850151 A EP81850151 A EP 81850151A EP 81850151 A EP81850151 A EP 81850151A EP 0047726 A3 EP0047726 A3 EP 0047726A3
Authority
EP
European Patent Office
Prior art keywords
platform
elevator
boom
safety device
upper boom
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Withdrawn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
EP81850151A
Other languages
German (de)
French (fr)
Other versions
EP0047726A2 (en
Inventor
Staffan Ferón
Sven Ake Pettersson
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.)
Kranlyft AB
Original Assignee
Kranlyft AB
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 Kranlyft AB filed Critical Kranlyft AB
Publication of EP0047726A2 publication Critical patent/EP0047726A2/en
Publication of EP0047726A3 publication Critical patent/EP0047726A3/en
Withdrawn legal-status Critical Current

Links

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
    • B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
    • B66F17/006—Safety devices, e.g. for limiting or indicating lifting force for working platforms

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

A safety device in working-plateform elevators and the like. The elevator comprises two interconnected booms (4 and 7), the lower one (4) of which is mounted to a chassis-mounted stand (3). The working platform or personnel carrier (10) which is connected to the upper boom, is maintained in position by upper and lower parallel arms (11 and 12). These arms are interconnected by a link (13). The upper boom movements relative to the lower boom is controlled by a hydraulic piston-and-cylinder unit (15).
The device is automatically activated upon occurrence of a predetermined angle between the upper boom (7) of the elevator and ground level or is manually operated via controls from the platform. The device comprises a linkage system comprising four link arms (17, 18, 19, 20) interconnecting the hydraulic piston-­ and-cylinder unit valve with a segment (21). The latter is actuated either by an abutment member (22) on the upper boom or by an actuating means operated from the platform. Movement of the segment resulting from such actuation is transferred via the linkage system to the valve, and the lower boom is lowered. The safety device ensures that the elevator booms cannot assume positions beyond the intended operational range of the elevator and that electric faults and the like cannot prevent lowering of the platform.
EP81850151A 1980-09-08 1981-09-07 A safety device in hydraulically operated working-platform elevators Withdrawn EP0047726A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8006230 1980-09-08
SE8006230A SE423620B (en) 1980-09-08 1980-09-08 SAFETY DEVICE FOR HYDRAULIC MANOVERED MAN LIFTS

Publications (2)

Publication Number Publication Date
EP0047726A2 EP0047726A2 (en) 1982-03-17
EP0047726A3 true EP0047726A3 (en) 1982-05-12

Family

ID=20341678

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81850151A Withdrawn EP0047726A3 (en) 1980-09-08 1981-09-07 A safety device in hydraulically operated working-platform elevators

Country Status (5)

Country Link
EP (1) EP0047726A3 (en)
JP (1) JPS5781100A (en)
DK (1) DK393381A (en)
FI (1) FI812772L (en)
SE (1) SE423620B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IN159477B (en) * 1982-05-28 1987-05-23 Simon Eng Dudley Ltd
JPS59501108A (en) * 1982-06-09 1984-06-28 エアリアル　アクセス　イクイツプメント　リミテツド access device
GB8304329D0 (en) * 1983-02-16 1983-03-23 Aerial Access Equip Control mechanism for access equipment
GB8327848D0 (en) * 1983-10-18 1983-11-16 Aerial Access Equip Access equipment
JPS60169342A (en) * 1984-02-14 1985-09-02 Toyoda Autom Loom Works Ltd Hydraulic circuit for elevator device in high level working vehicle
JPH0811203B2 (en) * 1986-05-13 1996-02-07 株式会社スギノマシン Ultra high pressure liquid ejector
DE4407695A1 (en) * 1994-03-08 1995-09-14 Karl Heitzler Trailer mount for land or construction site use
DE19712406B4 (en) * 1997-03-25 2004-11-04 Metz Aerials Gmbh & Co. Kg Device for controlling the movement of a lifting unit, such as an aerial ladder
SG82672A1 (en) * 1999-02-04 2001-08-21 Snorkel International Inc Aerial work platform boom having ground and platform controls linked by a controller area network
DE10144501A1 (en) * 2001-09-11 2003-04-03 Teupen Maschbau Gmbh Aerial work platform with hydraulic control

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB751599A (en) * 1954-01-22 1956-06-27 Thomas Adshead And Son Ltd A mobile machine with an elevatable and travelling carrier
DE1929692U (en) * 1964-10-20 1965-12-23 Fritz Metz K G HEIGHT-ADJUSTABLE WORK PLATFORM WITH ARTICULATED MAST.
DE1756741A1 (en) * 1968-07-05 1970-05-06 Kloeckner Humboldt Deutz Ag Articulated mast with work basket attached to a vehicle
GB1331656A (en) * 1972-05-01 1973-09-26 Simon Eng Dudley Ltd Access equipment
GB1458506A (en) * 1973-02-21 1976-12-15
US4081055A (en) * 1977-01-24 1978-03-28 Teco, Inc. Hydraulic device for controlling the perpendicularity of boom members in mobile platforms

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB751599A (en) * 1954-01-22 1956-06-27 Thomas Adshead And Son Ltd A mobile machine with an elevatable and travelling carrier
DE1929692U (en) * 1964-10-20 1965-12-23 Fritz Metz K G HEIGHT-ADJUSTABLE WORK PLATFORM WITH ARTICULATED MAST.
DE1756741A1 (en) * 1968-07-05 1970-05-06 Kloeckner Humboldt Deutz Ag Articulated mast with work basket attached to a vehicle
GB1331656A (en) * 1972-05-01 1973-09-26 Simon Eng Dudley Ltd Access equipment
GB1458506A (en) * 1973-02-21 1976-12-15
US4081055A (en) * 1977-01-24 1978-03-28 Teco, Inc. Hydraulic device for controlling the perpendicularity of boom members in mobile platforms

Also Published As

Publication number Publication date
SE423620B (en) 1982-05-17
FI812772L (en) 1982-03-09
SE8006230L (en) 1982-03-09
JPS5781100A (en) 1982-05-20
DK393381A (en) 1982-03-09
EP0047726A2 (en) 1982-03-17

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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

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PUAL Search report despatched

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AK Designated contracting states

Designated state(s): DE FR GB IT NL

AK Designated contracting states

Designated state(s): DE FR GB IT NL

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

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18D Application deemed to be withdrawn

Effective date: 19830404

RIN1 Information on inventor provided before grant (corrected)

Inventor name: FERON, STAFFAN

Inventor name: PETTERSSON, SVEN AKE