GB1217494A - Automatic compensator for crane lifting - Google Patents

Automatic compensator for crane lifting

Info

Publication number
GB1217494A
GB1217494A GB820467A GB820467A GB1217494A GB 1217494 A GB1217494 A GB 1217494A GB 820467 A GB820467 A GB 820467A GB 820467 A GB820467 A GB 820467A GB 1217494 A GB1217494 A GB 1217494A
Authority
GB
United Kingdom
Prior art keywords
vessel
cylinder
link
feb
hook
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
GB820467A
Inventor
Robert Colin Pearson
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 GB820467A priority Critical patent/GB1217494A/en
Publication of GB1217494A publication Critical patent/GB1217494A/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
    • B66C13/02—Devices for facilitating retrieval of floating objects, e.g. for recovering crafts from water

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)

Abstract

1,217,494. Fluid-pressure servomotor systems. R. C. PEARSON. Feb.15, 1968 [Feb. 21, 1967], No.8204/67. Heading G3P. [Also in Division B8] The cable 6 of a crane mounted on a marine drilling rig is provided with a manually controlled telescopic link to compensate for movements of a supply vessel when articles are being transferred to and from the latter. The link comprises a piston 9 connected by rod 7 to the cable, and a cylinder 8 connected by a chain to the hook 5. A valve spool 24 carried by a housing 10 fixed to cylinder 8 is biased by spring 33 to a position connecting port 29 to exhaust line 19, thereby allowing supply pressure admitted to chamber 17 from line 11 to fully retract the link. The spool is manually controlled from the vessel via lever 31 or a chain, and the cylinder 8 automatically follows movements of the lever whether those are intentional to reposition the hook or involuntary due to rise and fall of the vessel. Pressure fluid is supplied from the platform or vessel or from a pump on the ram, in which latter case the pump motor is powered through flexible cables.
GB820467A 1967-02-21 1967-02-21 Automatic compensator for crane lifting Expired GB1217494A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB820467A GB1217494A (en) 1967-02-21 1967-02-21 Automatic compensator for crane lifting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB820467A GB1217494A (en) 1967-02-21 1967-02-21 Automatic compensator for crane lifting

Publications (1)

Publication Number Publication Date
GB1217494A true GB1217494A (en) 1970-12-31

Family

ID=9847864

Family Applications (1)

Application Number Title Priority Date Filing Date
GB820467A Expired GB1217494A (en) 1967-02-21 1967-02-21 Automatic compensator for crane lifting

Country Status (1)

Country Link
GB (1) GB1217494A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS48103795U (en) * 1972-03-10 1973-12-04
CN101585479B (en) * 2009-06-15 2011-05-18 煤炭科学研究总院太原研究院 Hoist device of bracket transport vehicle
CN105370223A (en) * 2015-12-10 2016-03-02 吉林大学 Drill pipe screw thread protector
CN113233356A (en) * 2021-05-11 2021-08-10 江苏科技大学 Heave compensation system, heave compensation method and operation method for marine crane

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS48103795U (en) * 1972-03-10 1973-12-04
CN101585479B (en) * 2009-06-15 2011-05-18 煤炭科学研究总院太原研究院 Hoist device of bracket transport vehicle
CN105370223A (en) * 2015-12-10 2016-03-02 吉林大学 Drill pipe screw thread protector
CN113233356A (en) * 2021-05-11 2021-08-10 江苏科技大学 Heave compensation system, heave compensation method and operation method for marine crane

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