GB1117438A - Improvements in or relating to jacking apparatus - Google Patents

Improvements in or relating to jacking apparatus

Info

Publication number
GB1117438A
GB1117438A GB46459/66A GB4645966A GB1117438A GB 1117438 A GB1117438 A GB 1117438A GB 46459/66 A GB46459/66 A GB 46459/66A GB 4645966 A GB4645966 A GB 4645966A GB 1117438 A GB1117438 A GB 1117438A
Authority
GB
United Kingdom
Prior art keywords
ratchet
cylinder
ratchet mechanism
ratcheting
face
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
GB46459/66A
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
Publication of GB1117438A publication Critical patent/GB1117438A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/04—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction
    • E02B17/08—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering
    • E02B17/0836—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering with climbing jacks
    • E02B17/0863—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering with climbing jacks with rack and pawl mechanism

Abstract

1,117,438. Lifting jacks. N. H. CARGILE. 18 Oct., 1966 [18 Oct., 1965], No. 46459/66. Heading B8J. [Also in Divisions E1 and F1] A drilling barge B carrying a derrick D is raised above the water level W along spuds S by jacking mechanism 10. Each spud S is made of a cylindrical member 17 having a pair of L-shaped flanges 18 welded along its length, which flanges 18 are spaced from one another by regularly arranged support gussets 20 which provide upper and lower surfaces 20a and 20b, respectively, for co-operation with the associated jacking mechanism 10. The jacking mechanism includes an upper ratchet mechanism 15 and a lower ratchet mechanism 115 connected by an hydraulic cylinder apparatus 16. The ratchet mechanism 15 includes a ratchet member 24 pivoted at 25 and positionally controlled by a ratcheting cylinder 26 so that either face 24a is arranged to engage a lower gusset surface 20b or, as shown, face 24b is arranged to engage an upper gusset face 20a. The upper ratchet mechanism 15, together with the ratcheting cylinder 26, is attached to the piston of the cylinder apparatus 16, while the lower ratchet mechanism is fixed with respect to the barge deck 11 and located in a base support 13 to which the cylinder apparatus 16 is pivoted at 33. Surfaces 24c, 24d on the ratchet member 24 are arranged so as to slide over the point 20p of the gussets 20, on relative movement of the spud S past the ratchet 24, against the pressure of the ratcheting cylinder 26 which is provided with a variable relief valve (78), Fig. 6 (not shown). Control switches 35, 39 indicate the completion of the extension and retraction strokes. The apparatus is provided with a combined electrical and hydraulic control circuit (see Division F1), Fig. 6 (not shown), for operation of the device.
GB46459/66A 1965-10-18 1966-10-18 Improvements in or relating to jacking apparatus Expired GB1117438A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US497228A US3332663A (en) 1965-10-18 1965-10-18 Barge jacking apparatus

Publications (1)

Publication Number Publication Date
GB1117438A true GB1117438A (en) 1968-06-19

Family

ID=23975982

Family Applications (1)

Application Number Title Priority Date Filing Date
GB46459/66A Expired GB1117438A (en) 1965-10-18 1966-10-18 Improvements in or relating to jacking apparatus

Country Status (2)

Country Link
US (1) US3332663A (en)
GB (1) GB1117438A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3435621A (en) * 1966-07-26 1969-04-01 American Mach & Foundry Jacking system for offshore platforms
US4160538A (en) * 1977-05-02 1979-07-10 Pool Company Leg structure for jack-up platform with single point jacking
US4512553A (en) * 1982-03-17 1985-04-23 Red Fox Industries, Inc. Jack-up unit
US4505616A (en) * 1983-05-26 1985-03-19 Litton Systems, Inc. Self-locking chock system for a jack-up rig unit
US4626138A (en) * 1985-05-10 1986-12-02 Atlas Hydropiling Ltd. Non-impacting pile driver
JPS6344010A (en) * 1986-08-07 1988-02-25 Sumitomo Heavy Ind Ltd Leg retainer for marine working platform
FR2759400B1 (en) * 1997-02-07 1999-04-23 Schlumberger Services Petrol OIL DRILLING PLATFORM OF THE JACK-UP TYPE OR WITH RACK PILLARS WITH RACK, INDEPENDENTLY ELEVATED FOR EACH MEMBRANE OF EACH PILLAR
US7594781B1 (en) * 2007-06-01 2009-09-29 Ronald Sanders Lift boat leg

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3056585A (en) * 1959-01-29 1962-10-02 Werf Gusto V H A F Smulders Fa Apparatus for producing a relative linear displacement between a column and a movable body by means of hydraulic pressure
GB901008A (en) * 1959-08-12 1962-07-11 Werkspoor Nv Improvements in and relating to drilling platforms

Also Published As

Publication number Publication date
US3332663A (en) 1967-07-25

Similar Documents

Publication Publication Date Title
ES417211A1 (en) Motion compensated crown block system
GB1512533A (en) Excavator
GB1356517A (en) Light weight telescoping boom
GB1194916A (en) Improvements relating to a walking mechanism for a working apparatus
ES446108A1 (en) Pressure medium operable percussion tool
GB1380371A (en) Machine having a telescopic boom
GB1117438A (en) Improvements in or relating to jacking apparatus
GB1469918A (en) Fast exhaust circuit for hydraulic jacks
GB988849A (en) Bulldozers and bulldozer blade assembly therefor
GB1521697A (en) Lift trucks
GB1535284A (en) Self-levelling system for material handling implement
FR2306930A1 (en) Forklift truck attachment - comprises self levelling working platform on telescopic boom derricking on fork slide
GB1337440A (en) Method and mobile marine platform apparatus having floating submerged mat stabilisation
GB1177900A (en) Improved Hydraulic Control System for Lift Ram
GB1394265A (en) Multi-stage hoist and control system therefor
SE7309779L (en) ACCURACY HYDRAULIC VAG EQUIPMENT.
GB1222840A (en) End of travel detection device for fluid operated double acting ram
GB1301647A (en)
GB1001411A (en) Roof supports suitable for use in mines
GB1086963A (en) Bucket excavator for earthworking
GB909906A (en) Hydraulic control system for variable displacement pump
GB983441A (en) Improvements relating to the displacement of kerbs for traffic control
GB1385884A (en) Load raising and lowering jacking apparatus
GB1322118A (en) Safety control for crane load lines
GB1074184A (en) Fluid-pressure piston and cylinder device