GB1403046A - Load factor safety mechanism - Google Patents

Load factor safety mechanism

Info

Publication number
GB1403046A
GB1403046A GB4185772A GB4185772A GB1403046A GB 1403046 A GB1403046 A GB 1403046A GB 4185772 A GB4185772 A GB 4185772A GB 4185772 A GB4185772 A GB 4185772A GB 1403046 A GB1403046 A GB 1403046A
Authority
GB
United Kingdom
Prior art keywords
valve
load moment
control valve
boom
exceeded
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
Application number
GB4185772A
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.)
WEIMAR KOMBINAT VEB
Original Assignee
WEIMAR KOMBINAT VEB
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 WEIMAR KOMBINAT VEB filed Critical WEIMAR KOMBINAT VEB
Priority to GB4185772A priority Critical patent/GB1403046A/en
Publication of GB1403046A publication Critical patent/GB1403046A/en
Expired legal-status Critical Current

Links

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
    • B66C23/88—Safety gear
    • B66C23/90—Devices for indicating or limiting lifting moment
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/38—Cantilever beams, i.e. booms;, e.g. manufacturing processes, forms, geometry or materials used for booms; Dipper-arms, e.g. manufacturing processes, forms, geometry or materials used for dipper-arms; Bucket-arms
    • E02F3/382—Connections to the frame; Supports for booms or arms
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2203—Arrangements for controlling the attitude of actuators, e.g. speed, floating function

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Jib Cranes (AREA)

Abstract

1403046 Excavators WEIMAR-KOMBINAT VEB 8 Sept 1972 41857/72 Heading E1F [Also in Division 3H] In a hydraulically operated crane, loader or excavator having a boom 6 and a dipper arm 7 a safety overload system reduces the speed of operation when a first predetermined load moment is exceeded and prevents further operation when a second higher predetermined load moment is exceeded. The system which is described in relation to the boom operating cylinder 4 but is identical for the dipper arm operating cylinder 18 and for a further operating cylinder (34) Fig. 2B (not shown) associated with, for example, the propulsion or rotation of the crane &c comprises a line valve 15 to supply fluid from a pump 131 to the cylinder 4 and a direction control valve 16 to control the valve 15 with fluid from a pump 32. Disconnection valves 14, 33 are connected between the control valve and the line valve and are actuated by solenoids 24, 25 themselves actuated by a relay 19 controlled by a disconnection circuit 3 whose output is zero when the load moment detected by a transducer 2 exceeds the second predetermined limit whereby to close the valves 14, 33. A further control valve 28 is connected between the pump 32 and the direction control valve 16 and is actuated by a solenoid 27 controlled from an output 26 of the disconnection circuit 3 which is zero at the first predetermined load moment to open the valve 28 whereby the pressure in the line valve control circuits is now determined by pressure control valve 30 instead of pressure control valve 29 which is set at a higher value. The lower pressure allows the line valves 14, 33 to partially close and thus reduce the speed of operation of the cylinder 4. In the condition wherein the second load moment has been exceeded and the system shut down, an override switch 11 controlled by a cam disc 10 mounted on the boom 6 acts to energise one of the solenoids 24, 25 to allow movement of the boom in a load moment reducing direction.
GB4185772A 1972-09-08 1972-09-08 Load factor safety mechanism Expired GB1403046A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4185772A GB1403046A (en) 1972-09-08 1972-09-08 Load factor safety mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4185772A GB1403046A (en) 1972-09-08 1972-09-08 Load factor safety mechanism

Publications (1)

Publication Number Publication Date
GB1403046A true GB1403046A (en) 1975-08-13

Family

ID=10421667

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4185772A Expired GB1403046A (en) 1972-09-08 1972-09-08 Load factor safety mechanism

Country Status (1)

Country Link
GB (1) GB1403046A (en)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0003939A2 (en) * 1978-03-01 1979-09-05 Michel Gutierrez Improvements in hydraulically operated lifting devices
US4218837A (en) * 1978-08-21 1980-08-26 Koehring Company High lift hydraulic system for an excavator
FR2478607A1 (en) * 1980-03-21 1981-09-25 Manjot Roger Safety system for hydraulic lifting appts. - uses dual-threshold hydraulic pressure detection systems controlling movements of lifting arms
EP0037348A2 (en) * 1980-03-21 1981-10-07 Roger Manjot Safety device for hydraulically operated lifting device
US4365429A (en) * 1981-11-18 1982-12-28 Bucyrus-Erie Company Maximum lift system for hydraulic hoe
FR2534643A1 (en) * 1982-10-15 1984-04-20 Bennes Marrel Hydraulic circuit loading monitor for mobile crane
GB2174359A (en) * 1985-04-20 1986-11-05 Kombilift Ltd Load lifting apparatus
FR2600316A1 (en) * 1986-06-19 1987-12-24 Fiskars Ab Oy CONTROL DEVICE FOR THE ARROW OF A HYDRAULIC CRANE
EP0708053A1 (en) * 1994-08-26 1996-04-24 Hiab Export A/S Overload protection system for hydraulic boom cranes, especially of the type used on motor vehicles
WO2004007339A1 (en) * 2002-07-12 2004-01-22 J.C. Bamford Excavators Limited Control system for a load handling apparatus
WO2008004915A1 (en) * 2006-07-03 2008-01-10 Volvo Construction Equipment Ab Method and system for avoiding dropping a load
EP0849213B2 (en) † 1996-12-20 2010-06-23 Liebherr-Werk Biberach GmbH Tower crane
WO2014161636A1 (en) * 2013-04-05 2014-10-09 Liebherr-Werk Biberach Gmbh Crane
US8965637B2 (en) 2009-06-19 2015-02-24 J.C. Bamford Excavators Limited Method of operating a working machine
EP3431436A1 (en) 2017-07-17 2019-01-23 Manitou Bf Control of a handling machine
EP3431435A1 (en) 2017-07-17 2019-01-23 Manitou Bf Control of a handling machine
US11286141B2 (en) 2018-03-30 2022-03-29 Manitou Italia S.R.L. Articulated self-propelled work machine
US11447379B2 (en) 2018-10-09 2022-09-20 J.C. Bamford Excavators Limited Machine, controller and control method

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0003939A2 (en) * 1978-03-01 1979-09-05 Michel Gutierrez Improvements in hydraulically operated lifting devices
FR2418766A1 (en) * 1978-03-01 1979-09-28 Michel Gutierrez IMPROVEMENT IN HYDRAULIC CONTROLLED LIFTING DEVICES
EP0003939A3 (en) * 1978-03-01 1980-04-16 Michel Gutierrez Improvements in hydraulically operated lifting devices
US4218837A (en) * 1978-08-21 1980-08-26 Koehring Company High lift hydraulic system for an excavator
EP0037348A3 (en) * 1980-03-21 1982-08-11 Roger Manjot Safety device for hydraulically operated lifting device
EP0037348A2 (en) * 1980-03-21 1981-10-07 Roger Manjot Safety device for hydraulically operated lifting device
FR2478607A1 (en) * 1980-03-21 1981-09-25 Manjot Roger Safety system for hydraulic lifting appts. - uses dual-threshold hydraulic pressure detection systems controlling movements of lifting arms
US4365429A (en) * 1981-11-18 1982-12-28 Bucyrus-Erie Company Maximum lift system for hydraulic hoe
FR2534643A1 (en) * 1982-10-15 1984-04-20 Bennes Marrel Hydraulic circuit loading monitor for mobile crane
GB2174359A (en) * 1985-04-20 1986-11-05 Kombilift Ltd Load lifting apparatus
US4687406A (en) * 1985-04-20 1987-08-18 Kombilift Limited Load lifting apparatus with overturning prevention means
AU589955B2 (en) * 1985-04-20 1989-10-26 Simon Aerials Limited Load lifting apparatus
FR2600316A1 (en) * 1986-06-19 1987-12-24 Fiskars Ab Oy CONTROL DEVICE FOR THE ARROW OF A HYDRAULIC CRANE
EP0708053A1 (en) * 1994-08-26 1996-04-24 Hiab Export A/S Overload protection system for hydraulic boom cranes, especially of the type used on motor vehicles
EP0849213B2 (en) † 1996-12-20 2010-06-23 Liebherr-Werk Biberach GmbH Tower crane
WO2004007339A1 (en) * 2002-07-12 2004-01-22 J.C. Bamford Excavators Limited Control system for a load handling apparatus
AU2003253100B2 (en) * 2002-07-12 2008-02-14 J.C. Bamford Excavators Limited Control system for a load handling apparatus
GB2390595B (en) * 2002-07-12 2005-08-24 Bamford Excavators Ltd Control system for a machine
US8070413B2 (en) 2002-07-12 2011-12-06 J. C. Bamford Excavators Limited Control system for a load handling apparatus
WO2008004915A1 (en) * 2006-07-03 2008-01-10 Volvo Construction Equipment Ab Method and system for avoiding dropping a load
US8965637B2 (en) 2009-06-19 2015-02-24 J.C. Bamford Excavators Limited Method of operating a working machine
WO2014161636A1 (en) * 2013-04-05 2014-10-09 Liebherr-Werk Biberach Gmbh Crane
EP3431436A1 (en) 2017-07-17 2019-01-23 Manitou Bf Control of a handling machine
EP3431435A1 (en) 2017-07-17 2019-01-23 Manitou Bf Control of a handling machine
WO2019016013A1 (en) 2017-07-17 2019-01-24 Manitou Bf Control of a handling machine
WO2019016014A1 (en) 2017-07-17 2019-01-24 Manitou Bf Control of a handling machine
EP3431435B1 (en) 2017-07-17 2020-04-22 Manitou Bf Control of a handling machine
US11286141B2 (en) 2018-03-30 2022-03-29 Manitou Italia S.R.L. Articulated self-propelled work machine
US11447379B2 (en) 2018-10-09 2022-09-20 J.C. Bamford Excavators Limited Machine, controller and control method

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee