GB737737A - Improvements in or relating to mobile cranes and other lifting apparatus - Google Patents

Improvements in or relating to mobile cranes and other lifting apparatus

Info

Publication number
GB737737A
GB737737A GB2861151A GB2861151A GB737737A GB 737737 A GB737737 A GB 737737A GB 2861151 A GB2861151 A GB 2861151A GB 2861151 A GB2861151 A GB 2861151A GB 737737 A GB737737 A GB 737737A
Authority
GB
United Kingdom
Prior art keywords
section
valve
jib
conduit
rams
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
GB2861151A
Inventor
Joe Davidson Coldwell
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.)
Taylor & Sons Manchester Ltd F
Original Assignee
Taylor & Sons Manchester Ltd F
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 Taylor & Sons Manchester Ltd F filed Critical Taylor & Sons Manchester Ltd F
Priority to GB2861151A priority Critical patent/GB737737A/en
Publication of GB737737A publication Critical patent/GB737737A/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
    • B66C13/00—Other constructional features or details
    • B66C13/18—Control systems or devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C2700/00—Cranes
    • B66C2700/06—Cranes in which the lifting movement is done with a hydraulically controlled plunger
    • B66C2700/062—Cranes in which the lifting movement is done with a hydraulically controlled plunger mounted on motor vehicles

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Control And Safety Of Cranes (AREA)

Abstract

737,737. Lever load handling machines. TAYLOR & SONS (MANCHESTER), Ltd., F. March 6, 1953 [Dec. 6, 1951], No. 28611/51. Class 78 (3). A crane or like load-handling machine has a two-section jib each section of which is independently luffed by hydraulic rams supplied through a multiple control valve from a common pump, the actuating system associated with one section being maintained below a predetermined pressure by means of a relief valve the opening of which causes a cut-out valve to relieve the pressure in the system associated with the other jib section. The rear jib section 9<SP>1</SP> is luffed about a pivot 99 by a pair of rams 15 acting through an arm 13, whilst the outer jib section 9<SP>2</SP> is luffed about a pivot 18 by a ram 10 acting through a rod 11 and lever 12; lifting hooks 17 being provided at spaced positions on the outer jib to handle loads of various weights. The rams 10, 15 (Fig. 2) are fed from a reservoir 20 by a motor-driven gear pump 19 and a multiple control valve 27 which has a pair of control members 221, 22<SP>2</SP> axially movable into three positions of adjustment which respectively effect extension, retraction and holding of the associated rams. In the ram supply conduits 251, 25<SP>2</SP> are fitted pressure switches 34<SP>1</SP>, 34<SP>2</SP> which together with a pressure switch 38 connected in series with switch 34<SP>2</SP>, operate audible or visual warning devices on attainment of a predetermined pressure in the conduits ; overload relief valves 35<SP>1</SP>, 35<SP>2</SP> and pilot valves 36<SP>1</SP>, 36<SP>2</SP>, 36<SP>2</SP>a. In the event of an excessive load being applied to the outer jib section 9<SP>2</SP>, an overload relief valve 43, which is adapted to open at a lower setting than that of valve 35<SP>1</SP>, opens and admits fluid from ram 10 through conduit 46 to valve 35<SP>2</SP> so moving its piston 47 and thereby by-passing the fluid from conduit 25<SP>2</SP> to the reservoir 20 via conduit 49, discharge chamber 29 of control valve 27 and conduit 30.
GB2861151A 1951-12-06 1951-12-06 Improvements in or relating to mobile cranes and other lifting apparatus Expired GB737737A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2861151A GB737737A (en) 1951-12-06 1951-12-06 Improvements in or relating to mobile cranes and other lifting apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2861151A GB737737A (en) 1951-12-06 1951-12-06 Improvements in or relating to mobile cranes and other lifting apparatus

Publications (1)

Publication Number Publication Date
GB737737A true GB737737A (en) 1955-09-28

Family

ID=10278340

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2861151A Expired GB737737A (en) 1951-12-06 1951-12-06 Improvements in or relating to mobile cranes and other lifting apparatus

Country Status (1)

Country Link
GB (1) GB737737A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1143313B (en) * 1959-05-14 1963-02-07 Steinbock G M B H Crane boom for truck cranes
US3726417A (en) * 1971-08-13 1973-04-10 Fmc Corp Boom extension control system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1143313B (en) * 1959-05-14 1963-02-07 Steinbock G M B H Crane boom for truck cranes
US3726417A (en) * 1971-08-13 1973-04-10 Fmc Corp Boom extension control system

Similar Documents

Publication Publication Date Title
US3310335A (en) Load lifting mechanism
GB1192039A (en) Telescopic Boom Angle Control System for Cranes
GB1356517A (en) Light weight telescoping boom
GB1370736A (en) Winch apparatus
GB1381692A (en) Hydraulically operated apparatus for charging workpieces
GB1403199A (en) Overload switchoff device for hydraulic loading and unloading cranes
ES340405A1 (en) Device for releasing or producing hydraulic pressure in a chamber
GB737737A (en) Improvements in or relating to mobile cranes and other lifting apparatus
GB1342407A (en) Lift truck
GB1228802A (en)
GB1157355A (en) Improvements in or relating to Tongs for Handling Heavy Products
GB910803A (en) Back hoe excavator
GB1152022A (en) Materials Handling Apparatus having an Hydraulic Control
GB1453714A (en) Load handling equipment
GB1186447A (en) Fluid Pressure Operated Crane provided with a Safety Device
GB1025763A (en) An improved hydraulic control system for vehicle-borne equipment and implements
GB1211474A (en) Combined selector and control valve unit for hydraulic lifting and lowering devices
SU806585A1 (en) Hydro-operated clamshell
GB615265A (en) Improvements in or relating to lift trucks
GB1416212A (en) Machines having a component movable in extend and retract directions by at least one hydraulic cylinder
GB588899A (en) Improvements connected with hydraulically operated cranes
GB1217494A (en) Automatic compensator for crane lifting
GB1033728A (en) Device for luffing the jib of a crane
GB1383586A (en) Hydraulically operated loading crane including means for limitting the moment arm loading of the boom thereof
US3186432A (en) Hydraulic actuating and control systems