ES371261A1 - Safe load control system for telescopic crane booms - Google Patents

Safe load control system for telescopic crane booms

Info

Publication number
ES371261A1
ES371261A1 ES371261A ES371261A ES371261A1 ES 371261 A1 ES371261 A1 ES 371261A1 ES 371261 A ES371261 A ES 371261A ES 371261 A ES371261 A ES 371261A ES 371261 A1 ES371261 A1 ES 371261A1
Authority
ES
Spain
Prior art keywords
boom
circuit means
crane
lift motor
electrical circuit
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
ES371261A
Other languages
Spanish (es)
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.)
Grove Manufacturing Co
Original Assignee
Grove Manufacturing Co
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 Grove Manufacturing Co filed Critical Grove Manufacturing Co
Publication of ES371261A1 publication Critical patent/ES371261A1/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
    • B66C23/905—Devices for indicating or limiting lifting moment electrical

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)

Abstract

An overload prevention and indicator system for telescopic boom cranes of the stationary and/or mobile types in which the boom is pivotally raised and lowered in vertical planes by hydraulic lift motor means, the system including first electrical circuit means responsive to complete a selected on of a plurality of circuits corresponding to the length of the boom, the plurality of circuits being respectively connected in series to a corresponding plurality of second electrical circuit means, each representative of a predetermined increment of boom length, responsive to angular position of the telescopic boom in the vertical plane. The plurality of angular position outputs of each second electrical circuit means are connected according to predetermined crane overload information to a plurality of third circuit means representative of pressure range increments, and a pressure switch responsive to fluid pressure in the lift motor means, which is indicative of boom load, is connected to successively operate said third circuit means as the fluid pressure in said lift motor means increases and actuate an indicator and render inoperative selected operations of the crane when the crane approaches an overload or tipping condition at the particular length, angle and load condition at which it is operating at any instant.
ES371261A 1968-12-19 1969-09-05 Safe load control system for telescopic crane booms Expired ES371261A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US78514568A 1968-12-19 1968-12-19

Publications (1)

Publication Number Publication Date
ES371261A1 true ES371261A1 (en) 1971-09-01

Family

ID=25134585

Family Applications (1)

Application Number Title Priority Date Filing Date
ES371261A Expired ES371261A1 (en) 1968-12-19 1969-09-05 Safe load control system for telescopic crane booms

Country Status (12)

Country Link
US (1) US3641551A (en)
BE (1) BE742814A (en)
CH (1) CH525150A (en)
DE (1) DE1935031A1 (en)
DK (1) DK127287B (en)
ES (1) ES371261A1 (en)
FI (1) FI49700C (en)
FR (1) FR2026521A1 (en)
GB (2) GB1262674A (en)
NL (1) NL6913004A (en)
NO (1) NO133661C (en)
SE (1) SE355175B (en)

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3740534A (en) * 1971-05-25 1973-06-19 Litton Systems Inc Warning system for load handling equipment
GB1358871A (en) * 1971-06-25 1974-07-03 Pye Ltd Crane load indicator arrangement
US4039084A (en) * 1971-07-06 1977-08-02 Tadano Ironworks Co., Ltd. Safety-guard for a crane
US3841493A (en) * 1972-06-05 1974-10-15 J Becker Moment monitoring system for hydraulic-piston type cranes
US3771667A (en) * 1972-06-05 1973-11-13 J Becker Moment monitoring system for boom-cable type cranes
US4003482A (en) * 1972-11-27 1977-01-18 Societe Anonyme Dite: Potain Poclain Materiel Safety device for a crane
US3833130A (en) * 1973-04-20 1974-09-03 Krupp Gmbh Safety device for a top boom pivotally mounted on a crane boom
US3819922A (en) * 1973-05-02 1974-06-25 Forney Eng Co Crane load and radius indicating system
DE2400310C3 (en) * 1974-01-04 1981-02-26 Erhard 5509 Kell Kirsten Tilting moment protection for a telescopic jib crane
DE2504445C2 (en) * 1975-02-04 1977-03-24 Krueger & Co Kg DEVICE FOR MONITORING THE LOAD MOMENT OF AN ADJUSTABLE CRANE JIB
US4236864A (en) * 1978-11-09 1980-12-02 Raymond Couture Safety control system for the boom of a crane
US4395706A (en) * 1980-06-30 1983-07-26 Jlg Industries, Inc. Boom limit safety control circuit
USRE32366E (en) * 1980-06-30 1987-03-03 Jlg Industries, Inc. Boom limit safety control circuit
US5263597A (en) * 1991-09-18 1993-11-23 Stewart James T Crane load instrument and method therefor
US5143232A (en) * 1991-09-18 1992-09-01 Stewart James T Crane load instrument and method therefor
US5160055A (en) * 1991-10-02 1992-11-03 Jlg Industries, Inc. Load moment indicator system
US5359516A (en) * 1993-09-16 1994-10-25 Schwing America, Inc. Load monitoring system for booms
US5877693A (en) * 1998-05-27 1999-03-02 Grove U.S. L.L.C. Method and apparatus for measuring the length of a multi-section telescopic boom
US6779961B2 (en) 2001-10-29 2004-08-24 Ingersoll-Rand Company Material handler with electronic load chart
US6991119B2 (en) 2002-03-18 2006-01-31 Jlg Industries, Inc. Measurement system and method for assessing lift vehicle stability
US7014054B2 (en) 2002-07-01 2006-03-21 Jlg Industries, Inc. Overturning moment measurement system
GB0416336D0 (en) * 2004-07-22 2004-08-25 Bamford Excavators Ltd Method of operating a machine
CN101670984B (en) * 2009-09-29 2012-06-06 长沙中联重工科技发展股份有限公司 Optimal control method and control system of single-cylinder bolt type telescopic boom trail
JP6121663B2 (en) * 2012-07-10 2017-04-26 株式会社タダノ Work vehicle
US9067768B1 (en) 2012-12-14 2015-06-30 Construction Innovations, Inc. Crane rigging lighting system and method
US10782202B2 (en) 2017-07-28 2020-09-22 Brandt Industries Canada Ltd. Load moment indicator system and method
US11319193B2 (en) 2017-07-28 2022-05-03 Brandt Industries Canada Ltd. Monitoring system and method
US10994970B2 (en) 2019-07-29 2021-05-04 Jim D. Wiethorn Crane risk logic apparatus and system and method for use of same
CN112158780B (en) * 2020-09-14 2022-08-05 王海维 Floating type lifting swing connecting device
CN115010008B (en) * 2022-08-09 2022-10-21 山西省安装集团股份有限公司 Hoisting device for boiler installation

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1177303B (en) * 1958-10-16 1964-09-03 Krupp Ardelt Gmbh Anti-tip device for a crane or the like.
US2936847A (en) * 1959-02-02 1960-05-17 Jay M Eitel Mobile lifting equipment with extensible boom structure
DE1162987B (en) * 1960-11-15 1964-02-13 Demag Zug Gmbh Mobile crane with lowerable claws to increase the stability and length-adjustable boom
GB1000613A (en) * 1963-02-06 1965-08-11 British Hoist & Crane Company Safe load indicators for jib cranes
US3371800A (en) * 1966-07-21 1968-03-05 Grove Mfg Co Safe load control device for cranes
US3534355A (en) * 1967-03-28 1970-10-13 Dole Valve Co Load warning device
US3489294A (en) * 1968-04-25 1970-01-13 Bucyrus Erie Co Load limit control for hoisting equipment

Also Published As

Publication number Publication date
FI49700B (en) 1975-06-02
BE742814A (en) 1970-05-14
FI49700C (en) 1975-09-10
DK127287B (en) 1973-10-15
DE1935031A1 (en) 1970-07-16
CH525150A (en) 1972-07-15
NO133661B (en) 1976-03-01
SE355175B (en) 1973-04-09
US3641551A (en) 1972-02-08
FR2026521A1 (en) 1970-09-18
NL6913004A (en) 1970-06-23
GB1262673A (en) 1972-02-02
NO133661C (en) 1976-06-09
GB1262674A (en) 1972-02-02

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