GB747054A - Improvements in or relating to hydraulic cranes - Google Patents

Improvements in or relating to hydraulic cranes

Info

Publication number
GB747054A
GB747054A GB747454A GB747454A GB747054A GB 747054 A GB747054 A GB 747054A GB 747454 A GB747454 A GB 747454A GB 747454 A GB747454 A GB 747454A GB 747054 A GB747054 A GB 747054A
Authority
GB
United Kingdom
Prior art keywords
piston
jib
cylinder
ports
fluid
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
GB747454A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB747454A priority Critical patent/GB747054A/en
Publication of GB747054A publication Critical patent/GB747054A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)

Abstract

747,054. Jib cranes. FORSLUND, J. E. March 15, 1954, No. 7474/54. Class 78 (3). [Also in Group XXIX] In a ram for luffing a crane jib (not shown), fluid is supplied to the power cylinder 1 through a cylinder 19, annular space 18, ports 13 and annular space 12 so raising the piston 2 until a closure member 21 progressively obstructs ports 13 and space 12. The piston is thus gently brought to rest. When the cylinder 19 is opened to exhaust, fluid is released from cylinder 1 through ducts 22, 23 in member 21 and a ball valve 17; the restricted flow through this valve causing the piston 2 to lower slowly. Piston 2 is operatively connected with the jib through a rod 4 which is pivoted to the jib at one end and at the other rests in a spherical seat 3 in the piston 2.
GB747454A 1954-03-15 1954-03-15 Improvements in or relating to hydraulic cranes Expired GB747054A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB747454A GB747054A (en) 1954-03-15 1954-03-15 Improvements in or relating to hydraulic cranes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB747454A GB747054A (en) 1954-03-15 1954-03-15 Improvements in or relating to hydraulic cranes

Publications (1)

Publication Number Publication Date
GB747054A true GB747054A (en) 1956-03-28

Family

ID=9833799

Family Applications (1)

Application Number Title Priority Date Filing Date
GB747454A Expired GB747054A (en) 1954-03-15 1954-03-15 Improvements in or relating to hydraulic cranes

Country Status (1)

Country Link
GB (1) GB747054A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4270663A (en) * 1978-10-17 1981-06-02 Fmc Corporation Stop for crane boom

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4270663A (en) * 1978-10-17 1981-06-02 Fmc Corporation Stop for crane boom

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