US2980400A - Hook-block assembly - Google Patents

Hook-block assembly Download PDF

Info

Publication number
US2980400A
US2980400A US638267A US63826757A US2980400A US 2980400 A US2980400 A US 2980400A US 638267 A US638267 A US 638267A US 63826757 A US63826757 A US 63826757A US 2980400 A US2980400 A US 2980400A
Authority
US
United States
Prior art keywords
hook
pawl
shank
block assembly
shaft
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 - Lifetime
Application number
US638267A
Inventor
Spencer W Long
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.)
Armco Inc
Original Assignee
Armco Inc
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 Armco Inc filed Critical Armco Inc
Priority to US638267A priority Critical patent/US2980400A/en
Priority to GB20452/57A priority patent/GB822246A/en
Priority to GB14008/59A priority patent/GB852056A/en
Application granted granted Critical
Publication of US2980400A publication Critical patent/US2980400A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/02—Rod or cable suspensions
    • E21B19/04—Hooks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/22—Rigid members, e.g. L-shaped members, with parts engaging the under surface of the loads; Crane hooks
    • B66C1/34—Crane hooks

Definitions

  • a traveling block permits a close coupling of the traveling block and spring hook for minimum overall length, while at the same time permitting universal swiveling movement between the block and the hook.
  • the traveling block may cant slightly as it rises and falls in the derrick or mast without imparting this canting movement to the spring hook. Accordingly, the tendency for the lower end of the hook to swing from side to side as the block cants in one direction or the other is greatly reduced.
  • Another object of my invention is to provide an improved tongue construction for closing the hook opening.
  • a tongue is provided with a bail-receiving notch surface which extends for the full width of the hook body. In this way, there are no sharp edges of the hook body or tongue presented to the bail of the swivel which is received in the notch. Accordingly, damage to the bail is prevented and deformation of close-fitting relatively movable parts of the body and tongue is avoided.
  • Figure 1 is a front elevation partly in section, showing a preferred embodiment of my invention.
  • Figure 2 is a sectional side elevation taken substantially on the lines 2-2 as shown in Figure 1.
  • Figure 3 is a perspective view of the tongue of the spring hook, shown on an enlarged scale.
  • Figure 4 is an enlarged transverse sectional view taken substantially on the lines 4-4 as shown in Figure 2.
  • Figure 5 is an enlarged transverse sectional view of the rotation lock assembly and adjoining parts taken substantially on the lines 55 as shown in Figure 2.
  • Figure 6 is a sectional view of the rotation lock assembly taken substantially on the lines 6-6 as shown in Figure 5, the parts being in locking position.
  • Figure 7 is a sectional view similar to Figure 6, the parts being in retracted position.
  • Figure 8 is an end view of the left hand end of Figure 5.
  • Figure 9 is an end view of the right hand end of Figure 5.
  • the traveling block generally designated 10 includes a pair of side plates 11 and 12 supporting a stationary shaft 13 which extends between them.
  • a plurality of cable sheaves 14 are each rotatably mounted on the shaft 13 by means of suitable bearings (not shown).
  • a cap 15 extends between the upper ends Patented Apr. 18, 19621 of a bolt 16.
  • a spacer 17 extends between the side plates 113ml 12 at, alocation below the sheaves 14 and this spacer is held in place by means of bolts 18.
  • Cable gnards19 may be detachably connected to the cap 15'and spacer 17.
  • the spring hook generally designated 20 is connected to the traveling block 10, by means of an improved form of gimb al connection 21 embodying my invention.
  • Themember 22 carries. a headed cross pin 25 whichhas an axis which intersects the axis of the trunnions 23 at right angles.
  • the loadcarrying shank 26 of the hook. assembly 20 has an eye portion 27. on itsupper end which is supported on the pin25.
  • the eye portion 27 extends into a recess 28 provided in the member 22.
  • a bushing 29 may beprovided withinthe eyefor contacting the pin 25.
  • a nut 30 holds the pin 25 in position and a key 22a welded to member 22 prevents itfrom turning.
  • the trunnions 23 and the cross pin 25, in elfect provide gimbals permitting the shank 26 to have universal movement with respect to the traveling block 10.
  • the spring hook 20 has a nut 31 threaded to the lower endof'the shank 26 and a bearing assembly 32 is supported on this nut 31,
  • the lower ends of the compression springs 33 and 34 are supported on bearingassembly 32.
  • the upper ends of these springs engage the shoulder35' on the housing 36.
  • shoulder 37 on housing 36 rests on bearing assembly 32
  • a skirt 38 shrunk on the shank 26 enclosesthe upper end of the housing 36 in telescopic relationship.
  • the main hook body 39 is connected to the housing 36" by threads 40.
  • a recess 41 is formed in the hook body 39 to provide clearance for the nut 31.
  • a rotation lock ring 42 is rotatably held between housing 36 and body 39 and has a slidable connection with the axial keyway 43 formed on the outer surface of the nut 31.
  • Recesses 44 are provided in the under surface of the ring 42 and these recesses are adapted to be engaged by a locking pawl 65, as described below, for the purpose of preventing rotation between the hook body 39 and the shank 26.
  • a bar 45 acts as a key to prevent unscrewing of the nut 31 with respect to the shank 26.
  • Side notches 46 are provided on the hook body 39 for the purpose of supporting the elevator links (not shown), as will be readily understood by those skilled in the art.
  • the side notches 46 may be closed by means of the links 47 to retain the elevator links in place.
  • the main load supporting notch 48 in the hook body 39 is closed by means of the tongue 49 which is pivotally connected to the hook body 39 by means of the pivot pin 50.
  • the pivot pin 50 passes through the bore 51 in the tongue 49.
  • the tongue 49 has a relatively narrow central section 52 which is received within a cooperating groove 53 formed on the hook body 39.
  • the tongue has a relatively wide crowned surface 54 in the form of a double curved saddle for reception of the swivel bail (not shown). This saddle surface 54 is convex in the central vertical plane parallel to the axis of pin 50 and concave in the 5 central vertical plane normal to the axis of the pin 50.
  • This cage60 carries alatch shaft 62 ,and a pawl shaft 63, each of which is mounted tofturn inlthe cage, 60.
  • a pawl 655-is fixed'onf-the pawl shaftr63 and this A nut 64 holds, the cage 60 in position against disassenimeans may include the pivoted I 4L 1 1 a a a .
  • I do not wi'shto be limited to the details pawl is adapted to engage the recesses 4411111111: lock ring 42.' 'A torsion spring 66.aets, to turn the pawl shaft 63 in a direction to extend'the-pawl 65.
  • a pawl operating lever, 67 islfixed o n one endof the pawl shaft 63 in orderto. retract ,the pawl 65 against the action of the torsion spring 166.
  • a torsion spring 68 acts on the latch shaft 6210 turn it in a clockwise direction as viewed in Figures ,6 and 7.
  • a latch 69 fixed on the shaft 62 is adaptedto engage an abutment 70 formed on thepawlf65.
  • a latch operating lever 71 is fixed on the projecting end of the latch shaft 62. Actuation of the lever' 71 serves toturn the latching shaft 62 in a counterclockwise direction as 'viewed'in Figures 6 and 7.
  • actuationof the-lever 67 serves to-tur'nithe pawl shaft 63 in a direction to retract the pawl 65 from the position r show'n in, Figure 6 to the position shown in' Figure 7.
  • the spring68 then moves the latch 69 into position to engage the shoulder 70 on the pawl 65. This serves to latch the pawl 65 .in retracted position. 1
  • the hook body 39 isrthen free to turn with respect to the shank 26. Actuation of the lever 71 moves the latch 69 out of the path of movement of the shoulder 70 with the result that the spring 66 swings the pawl 65 into the extended position shown in Figure 16 to engage one of the recesses 44 ofthelockringfl. 1 r
  • a traveling block having'parallehsidelplates defining the side boundaries of said block apluralitygof sheaves rotatably supported between said plates, said plates projecting below the lower portions of said sheaves and being provided with aligned apertures, amember positioned between the lower ends of, said plates and having faces abutting the inner surfaces of said plates, said member having a pair oflcoaxial oppositelyextending horizontal trunnions projecting fronrsaid faces and pivotally mounted in said apertures, said member having a central recess, a spring hook assembly having a housing positioned below the said member and having a hook element fixed thereto saigl housing being-larger than the recess in said member, a load carrying shank within saidrhousing and extending' :upwardly into 'saidrecess, said shank having a transverse opening, 'a horizontal cross pin mountedrup'on said member and extending through said transverse opening to pivotally

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
  • Earth Drilling (AREA)
  • General Details Of Gearings (AREA)

Description

April 18, 1961 s. w. LONG 2,980,400
HOOK-BLOCK ASSEMBLY Filed Feb. 5, 1957 s Sheets-Sheet 1 INVENTOR. SPE/VCTEQ m Lave 55 52 mp g 55 m S. W. LONG HOOK-BLOCK ASSEMBLY April 18, 1961 3 Sheets-Sheet 2 Filed Feb. 5, 1957 IN VEN TOR. 4 4 40/1/6- a April 18, 1961 s. w. LONG HOOK-BLOCK ASSEMBLY 5 Sheets-Sheet 3 Filed Feb. 5, 1957 FIG. 6.
HOOK-BLOCK ASSEMBLY Spencer W. Long, lnglewood, Calif., assignor, by mesne assignments, to Armco Steel Corporation, Middletown, Ohio, a corporation of Ohio FiledFeb. 5,1957, SenNo. 638,267
1 Claim. ((1254-1921 w This invention relates to apparatus of the type used in the drilling of wells, and is particularly'directed' to improvements in a hook-block assembly. Devices of this type are used in the derrick or mast to support the load of the drill pipe or casing, and for other purposes. This invention relates to improvements over the construction disclosed in my prior Patent No. 2,661,232, granted December 1, 1953, for Drilling Hook Assembly.
It is an important object of this invention to provide an improved form of gimbal connection for supporting a spring hook from a traveling block. Such a device permits a close coupling of the traveling block and spring hook for minimum overall length, while at the same time permitting universal swiveling movement between the block and the hook. In this way the traveling block may cant slightly as it rises and falls in the derrick or mast without imparting this canting movement to the spring hook. Accordingly, the tendency for the lower end of the hook to swing from side to side as the block cants in one direction or the other is greatly reduced.
Another object of my invention is to provide an improved tongue construction for closing the hook opening. A tongue is provided with a bail-receiving notch surface which extends for the full width of the hook body. In this way, there are no sharp edges of the hook body or tongue presented to the bail of the swivel which is received in the notch. Accordingly, damage to the bail is prevented and deformation of close-fitting relatively movable parts of the body and tongue is avoided.
Other and more detailed objects and advantages will appear hereinafter.
In the drawings:
Figure 1 is a front elevation partly in section, showing a preferred embodiment of my invention.
Figure 2 is a sectional side elevation taken substantially on the lines 2-2 as shown in Figure 1.
Figure 3 is a perspective view of the tongue of the spring hook, shown on an enlarged scale.
Figure 4 is an enlarged transverse sectional view taken substantially on the lines 4-4 as shown in Figure 2.
Figure 5 is an enlarged transverse sectional view of the rotation lock assembly and adjoining parts taken substantially on the lines 55 as shown in Figure 2.
Figure 6 is a sectional view of the rotation lock assembly taken substantially on the lines 6-6 as shown in Figure 5, the parts being in locking position.
Figure 7 is a sectional view similar to Figure 6, the parts being in retracted position.
Figure 8 is an end view of the left hand end of Figure 5.
Figure 9 is an end view of the right hand end of Figure 5.
Referring to the drawings, the traveling block generally designated 10 includes a pair of side plates 11 and 12 supporting a stationary shaft 13 which extends between them. A plurality of cable sheaves 14 are each rotatably mounted on the shaft 13 by means of suitable bearings (not shown). A cap 15 extends between the upper ends Patented Apr. 18, 19621 of a bolt 16. Similarly a spacer 17 extends between the side plates 113ml 12 at, alocation below the sheaves 14 and this spacer is held in place by means of bolts 18.
Cable gnards19 may be detachably connected to the cap 15'and spacer 17.
The spring hook generally designated 20 is connected to the traveling block 10, by means of an improved form of gimb al connection 21 embodying my invention. Ihemember 22 base. p r of pp y extending eeeX- ial trunnions 23 which project from faces 22a and 22b which abut the inner surfaces of the side plates 11 and 12. These trunnions 23 are received within aligned bushings 24provided inside plates lland 12 below the lower extremitiesofthe sheaves 14. Themember 22 carries. a headed cross pin 25 whichhas an axis which intersects the axis of the trunnions 23 at right angles. The loadcarrying shank 26 of the hook. assembly 20 has an eye portion 27. on itsupper end which is supported on the pin25. The eye portion 27 extends into a recess 28 provided in the member 22. A bushing 29 may beprovided withinthe eyefor contacting the pin 25. A nut 30 holds the pin 25 in position and a key 22a welded to member 22 prevents itfrom turning. The trunnions 23 and the cross pin 25, in elfect provide gimbals permitting the shank 26 to have universal movement with respect to the traveling block 10.
The spring hook 20 has a nut 31 threaded to the lower endof'the shank 26 and a bearing assembly 32 is supported on this nut 31, The lower ends of the compression springs 33 and 34 are supported on bearingassembly 32. The upper ends of these springs engage the shoulder35' on the housing 36. When the springs are compressed, shoulder 37 on housing 36 rests on bearing assembly 32, A skirt 38 shrunk on the shank 26 enclosesthe upper end of the housing 36 in telescopic relationship. The main hook body 39 is connected to the housing 36" by threads 40. A recess 41 is formed in the hook body 39 to provide clearance for the nut 31. A rotation lock ring 42 is rotatably held between housing 36 and body 39 and has a slidable connection with the axial keyway 43 formed on the outer surface of the nut 31. Recesses 44 are provided in the under surface of the ring 42 and these recesses are adapted to be engaged by a locking pawl 65, as described below, for the purpose of preventing rotation between the hook body 39 and the shank 26. A bar 45 acts as a key to prevent unscrewing of the nut 31 with respect to the shank 26.
Side notches 46 are provided on the hook body 39 for the purpose of supporting the elevator links (not shown), as will be readily understood by those skilled in the art. The side notches 46 may be closed by means of the links 47 to retain the elevator links in place. The main load supporting notch 48 in the hook body 39 is closed by means of the tongue 49 which is pivotally connected to the hook body 39 by means of the pivot pin 50. The pivot pin 50 passes through the bore 51 in the tongue 49.
The tongue 49 has a relatively narrow central section 52 which is received within a cooperating groove 53 formed on the hook body 39. The tongue has a relatively wide crowned surface 54 in the form of a double curved saddle for reception of the swivel bail (not shown). This saddle surface 54 is convex in the central vertical plane parallel to the axis of pin 50 and concave in the 5 central vertical plane normal to the axis of the pin 50.
as shown in Figure' Z this latch'56 engaged by the spring-urged plunger 57. An
1 This cage60 carries alatch shaft 62 ,and a pawl shaft 63, each of which is mounted tofturn inlthe cage, 60.
A pawl 655-is fixed'onf-the pawl shaftr63 and this A nut 64 holds, the cage 60 in position against disassenimeans may include the pivoted I 4L 1 1 a a a Havingfully described my invention, it is to be understood that I do not wi'shto be limited to the details pawl is adapted to engage the recesses 4411111111: lock ring 42.' 'A torsion spring 66.aets, to turn the pawl shaft 63 in a direction to extend'the-pawl 65.- A pawl operating lever, 67 islfixed o n one endof the pawl shaft 63 in orderto. retract ,the pawl 65 against the action of the torsion spring 166. A torsion spring 68 acts on the latch shaft 6210 turn it in a clockwise direction as viewed in Figures ,6 and 7. A latch 69 fixed on the shaft 62 is adaptedto engage an abutment 70 formed on thepawlf65. A latch operating lever 71 is fixed on the projecting end of the latch shaft 62. Actuation of the lever' 71 serves toturn the latching shaft 62 in a counterclockwise direction as 'viewed'in Figures 6 and 7. 30
From thedescription, it will be understood that actuationof the-lever 67 serves to-tur'nithe pawl shaft 63 in a direction to retract the pawl 65 from the position r show'n in, Figure 6 to the position shown in'Figure 7. The spring68 then moves the latch 69 into position to engage the shoulder 70 on the pawl 65. This serves to latch the pawl 65 .in retracted position. 1 The hook body 39 isrthen free to turn with respect to the shank 26. Actuation of the lever 71 moves the latch 69 out of the path of movement of the shoulder 70 with the result that the spring 66 swings the pawl 65 into the extended position shown in Figure 16 to engage one of the recesses 44 ofthelockringfl. 1 r
'upon said shank. 7
herein set forth, but my invention is of the full scope of the appended claim.
'I claim: I a
In a hook-block assembly, the combination-of: a traveling block having'parallehsidelplates defining the side boundaries of said block apluralitygof sheaves rotatably supported between said plates, said plates projecting below the lower portions of said sheaves and being provided with aligned apertures, amember positioned between the lower ends of, said plates and having faces abutting the inner surfaces of said plates, said member having a pair oflcoaxial oppositelyextending horizontal trunnions projecting fronrsaid faces and pivotally mounted in said apertures, said member having a central recess, a spring hook assembly having a housing positioned below the said member and having a hook element fixed thereto saigl housing being-larger than the recess in said member, a load carrying shank within saidrhousing and extending' :upwardly into 'saidrecess, said shank having a transverse opening, 'a horizontal cross pin mountedrup'on said member and extending through said transverse opening to pivotallysupport said shank, and means including. a'spring within the ,housing and encirclingtsaid Ishank -for supporting the housing 'Reterenees Cited in the file of this patent I v 1 1 UNITED STATES PATENTS 1 'Wrig ht May 21, 1929 2,331,341" Nicholson et a]; Oct. 12, 1943 2,613,101 Roberson Oct. 7, 1952 2,681,794 Johnson June 22, 1954 2,778,602 Fate 'Jan. 22, 1957 2,820,624 Koe e1' Jan. 21, 1958 V V 1 YFQREIVGNPATENTS 7 143,419 Austria,. Novpll, 1935
US638267A 1957-02-05 1957-02-05 Hook-block assembly Expired - Lifetime US2980400A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US638267A US2980400A (en) 1957-02-05 1957-02-05 Hook-block assembly
GB20452/57A GB822246A (en) 1957-02-05 1957-06-28 Hook block assembly
GB14008/59A GB852056A (en) 1957-02-05 1957-06-28 Hook block assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US638267A US2980400A (en) 1957-02-05 1957-02-05 Hook-block assembly

Publications (1)

Publication Number Publication Date
US2980400A true US2980400A (en) 1961-04-18

Family

ID=24559319

Family Applications (1)

Application Number Title Priority Date Filing Date
US638267A Expired - Lifetime US2980400A (en) 1957-02-05 1957-02-05 Hook-block assembly

Country Status (2)

Country Link
US (1) US2980400A (en)
GB (2) GB822246A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3202446A (en) * 1963-01-15 1965-08-24 Armco Steel Corp Hook positioner
US3278163A (en) * 1964-10-07 1966-10-11 Dresser Ind Hook assembly
EP0124467A1 (en) * 1983-04-18 1984-11-07 Varco International, Inc. Drill rig hook
WO1995011188A1 (en) * 1993-10-18 1995-04-27 Msi Crane & Equipment Co. Load block
CN102897656A (en) * 2012-09-19 2013-01-30 武汉船用机械有限责任公司 Lift hook assembly for crane
JP2015058993A (en) * 2013-09-17 2015-03-30 カヤバ システム マシナリー株式会社 Suspension mechanism
CN105314527A (en) * 2015-12-01 2016-02-10 青岛造船厂有限公司 Automatic hooking device used for lifting movable pulley
US20210139289A1 (en) * 2018-03-21 2021-05-13 Liebherr-Werk Biberach Gmbh Spring lifting device for a crane
US11208300B2 (en) * 2017-10-09 2021-12-28 Shanghai Maritime University Super large tonnage detachable hook

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4475755A (en) * 1982-09-24 1984-10-09 The Crosby Group, Inc. Apparatus and method for assembly-disassembly of a spring loaded hook

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1713586A (en) * 1927-07-20 1929-05-21 Oklahoma Iron Works Tackle block
US2331341A (en) * 1942-01-09 1943-10-12 Byron Jackson Co Drilling hook
US2613101A (en) * 1950-10-17 1952-10-07 Roberson Claude Mcjunis Hook latch operating mechanism
US2681794A (en) * 1950-06-13 1954-06-22 Baash Ross Tool Co Traveling block and connector
US2778602A (en) * 1954-02-02 1957-01-22 Jr Jessee E Fate Traveling block
US2820624A (en) * 1955-09-26 1958-01-21 Harnischfeger Corp Weighing bottom block

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1713586A (en) * 1927-07-20 1929-05-21 Oklahoma Iron Works Tackle block
US2331341A (en) * 1942-01-09 1943-10-12 Byron Jackson Co Drilling hook
US2681794A (en) * 1950-06-13 1954-06-22 Baash Ross Tool Co Traveling block and connector
US2613101A (en) * 1950-10-17 1952-10-07 Roberson Claude Mcjunis Hook latch operating mechanism
US2778602A (en) * 1954-02-02 1957-01-22 Jr Jessee E Fate Traveling block
US2820624A (en) * 1955-09-26 1958-01-21 Harnischfeger Corp Weighing bottom block

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3202446A (en) * 1963-01-15 1965-08-24 Armco Steel Corp Hook positioner
US3278163A (en) * 1964-10-07 1966-10-11 Dresser Ind Hook assembly
EP0124467A1 (en) * 1983-04-18 1984-11-07 Varco International, Inc. Drill rig hook
US4498698A (en) * 1983-04-18 1985-02-12 Varco International, Inc. Drill rig hook
WO1995011188A1 (en) * 1993-10-18 1995-04-27 Msi Crane & Equipment Co. Load block
US5476247A (en) * 1993-10-18 1995-12-19 Msi Crane & Equipment Co. Load block
CN102897656A (en) * 2012-09-19 2013-01-30 武汉船用机械有限责任公司 Lift hook assembly for crane
JP2015058993A (en) * 2013-09-17 2015-03-30 カヤバ システム マシナリー株式会社 Suspension mechanism
CN105314527A (en) * 2015-12-01 2016-02-10 青岛造船厂有限公司 Automatic hooking device used for lifting movable pulley
US11208300B2 (en) * 2017-10-09 2021-12-28 Shanghai Maritime University Super large tonnage detachable hook
US20210139289A1 (en) * 2018-03-21 2021-05-13 Liebherr-Werk Biberach Gmbh Spring lifting device for a crane
US11932516B2 (en) * 2018-03-21 2024-03-19 Liebherr-Werk Biberach Gmbh Spring lifting device for a crane

Also Published As

Publication number Publication date
GB852056A (en) 1960-10-19
GB822246A (en) 1959-10-21

Similar Documents

Publication Publication Date Title
US2980400A (en) Hook-block assembly
US3371951A (en) Material handling fittings
US3135555A (en) Safety guard for ram of hydraulic hoist
US2027376A (en) Safety hook
US2866247A (en) Safety lock for crane hook
US3309130A (en) Reversible tubing elevator
US1867574A (en) Rod-line weight
US2508595A (en) Combination traveling block and swivel connection
US2215049A (en) Hook for rotary well drilling
US2264775A (en) Well casing elevator
US3278163A (en) Hook assembly
US2158373A (en) Spring hook
US1558261A (en) Pipe elevator
US2067663A (en) Elevator and latch construction
US2576261A (en) Hook
US2506593A (en) Spring hook
US2732244A (en) Hook positioner
US2664175A (en) Hook locking mechanism
US1599144A (en) Well elevator
US3028725A (en) Elevator link and wear plate having means aiding in assembly thereof
US1754288A (en) Well apparatus
US2279315A (en) Drilling hook
US3724568A (en) Core drill latch
US2681794A (en) Traveling block and connector
US2237856A (en) Elevator