DE2340431A1 - Hydraulische steuervorrichtung fuer einen kran - Google Patents

Hydraulische steuervorrichtung fuer einen kran

Info

Publication number
DE2340431A1
DE2340431A1 DE19732340431 DE2340431A DE2340431A1 DE 2340431 A1 DE2340431 A1 DE 2340431A1 DE 19732340431 DE19732340431 DE 19732340431 DE 2340431 A DE2340431 A DE 2340431A DE 2340431 A1 DE2340431 A1 DE 2340431A1
Authority
DE
Germany
Prior art keywords
valve
control
main control
boom
cylinder
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.)
Ceased
Application number
DE19732340431
Other languages
German (de)
English (en)
Inventor
Wallace J Witwer
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.)
Harnischfeger Corp
Original Assignee
Harnischfeger 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 Harnischfeger Corp filed Critical Harnischfeger Corp
Publication of DE2340431A1 publication Critical patent/DE2340431A1/de
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/20—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating members
    • 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
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
    • B66C23/705—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by hydraulic jacks

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Jib Cranes (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control And Safety Of Cranes (AREA)
DE19732340431 1972-08-14 1973-08-09 Hydraulische steuervorrichtung fuer einen kran Ceased DE2340431A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US28048272A 1972-08-14 1972-08-14

Publications (1)

Publication Number Publication Date
DE2340431A1 true DE2340431A1 (de) 1974-02-28

Family

ID=23073265

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19732340431 Ceased DE2340431A1 (de) 1972-08-14 1973-08-09 Hydraulische steuervorrichtung fuer einen kran

Country Status (7)

Country Link
US (1) US3777899A (enrdf_load_stackoverflow)
JP (1) JPS4951476A (enrdf_load_stackoverflow)
BR (1) BR7306190D0 (enrdf_load_stackoverflow)
DE (1) DE2340431A1 (enrdf_load_stackoverflow)
FR (1) FR2196442B1 (enrdf_load_stackoverflow)
GB (1) GB1416212A (enrdf_load_stackoverflow)
IT (1) IT990111B (enrdf_load_stackoverflow)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4102250A (en) * 1976-08-16 1978-07-25 Caterpillar Tractor Co. Load check and bypass valve
GB2268780A (en) * 1992-06-24 1994-01-19 Gullick Dobson Ltd Mining apparatus
US5927520A (en) * 1995-10-06 1999-07-27 Kidde Industries, Inc. Electro-hydraulic operating system for extensible boom crane
US5937646A (en) * 1997-07-10 1999-08-17 Mi-Jack Products Hydraulic charge boost system for a gantry crane
CN102297180B (zh) * 2011-08-09 2013-01-02 三一重工股份有限公司 一种支腿锁止系统及移动式工程机械
CN102425585A (zh) * 2011-12-07 2012-04-25 中联重科股份有限公司 泵送装置的闭式液压系统及其控制方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2768500A (en) * 1955-05-20 1956-10-30 Oilgear Co Hydraulic drive
US3371799A (en) * 1967-03-01 1968-03-05 Baldwin Lima Hamilton Corp Telescopic boom angle control system
DE1949712A1 (de) * 1968-11-19 1970-06-11 Ind Karl Marx Stadt Veb Hydraulische Steuereinrichtung
US3641876A (en) * 1969-11-12 1972-02-15 American Hoist & Derrick Co Two-speed hydraulic control system
US3605561A (en) * 1969-12-22 1971-09-20 Pettibone Corp One handle sequence selecting valving for crowd cylinders
US3721350A (en) * 1970-02-12 1973-03-20 Fmc Corp Boom extension control system

Also Published As

Publication number Publication date
FR2196442B1 (enrdf_load_stackoverflow) 1976-11-19
IT990111B (it) 1975-06-20
FR2196442A1 (enrdf_load_stackoverflow) 1974-03-15
JPS4951476A (enrdf_load_stackoverflow) 1974-05-18
US3777899A (en) 1973-12-11
BR7306190D0 (pt) 1974-06-27
GB1416212A (en) 1975-12-03

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Legal Events

Date Code Title Description
OD Request for examination
8131 Rejection