US3895836A - Structural member lifting and releasing device - Google Patents

Structural member lifting and releasing device Download PDF

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US3895836A
US3895836A US409549A US40954973A US3895836A US 3895836 A US3895836 A US 3895836A US 409549 A US409549 A US 409549A US 40954973 A US40954973 A US 40954973A US 3895836 A US3895836 A US 3895836A
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locking member
legs
shape
end portion
structural member
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US409549A
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Eldridge Barnes
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Classifications

    • 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
    • B66C1/62—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 comprising article-engaging members of a shape complementary to that of the articles to be handled
    • B66C1/64—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 comprising article-engaging members of a shape complementary to that of the articles to be handled for T- or I-section beams or girders
    • 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
    • B66C1/62—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 comprising article-engaging members of a shape complementary to that of the articles to be handled
    • B66C1/66—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 comprising article-engaging members of a shape complementary to that of the articles to be handled for engaging holes, recesses, or abutments on articles specially provided for facilitating handling thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B45/00—Hooks; Eyes
    • F16B45/04—Hooks with sliding closing member
    • F16B45/049—Hooks with sliding closing member provided with means biasing the closing member
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/45—Separable-fastener or required component thereof [e.g., projection and cavity to complete interlock]
    • Y10T24/45225—Separable-fastener or required component thereof [e.g., projection and cavity to complete interlock] including member having distinct formations and mating member selectively interlocking therewith
    • Y10T24/45272—Projection passes through cavity then moves toward noninserted portion of its member to complete interlock [e.g., snap hook]
    • Y10T24/45288—Hook type projection member
    • Y10T24/45304—Noninserted portion of projection member includes movably connected gate for closing access throat
    • Y10T24/45382—Track or way guided gate
    • Y10T24/45387—Track or way guided gate having means biasing gate
    • Y10T24/45398—Cavity in shank forms track or way
    • Y10T24/45403—Cavity in shank forms track or way with position locking-means for gate

Definitions

  • a generally rectangular body is vertically disposed edgewise and provided with a bail for connection with a hoisting cable.
  • the depending edge portion of the body is provided with a transverse slot of generally U- shape.
  • the legs forming the U-shape are transversely apertured for receiving a locking member adapted to be projected across the legs of the U-shape and engage an edge portion of a structural member to be lifted.
  • Control means connected with the locking member, retracts the latter to release the structural member from a remote location.
  • the present invention relates to construction work and more particularly to a hoist and line operated lifting apparatus for positioning elongated structural members.
  • Bridge and building piles usually comprise elongated structural members referred to as H-beams which are relatively long, from 70 to 90 feet in length, and must be vertically disposed within a hole or socket formed in the earth for later driving the beams further into the earth.
  • H-beam has been lifted by a hoist, such as a crane, having a hook connected with the upper end portion of the beam thus necessitating a workman climbing the beam to release the hook before the pile driving action begins.
  • This invention overcomes this disadvantage by providing an apparatus engageable with one end portion of such a beam which may be released by workmen on the ground after the beam has been vertically disposed.
  • Pat. No. 2,276,990 discloses a powder loading device including a hollow body provided with a downwardly open U-shaped slot in its depending surface for supporting a powder cartridge supporting ring by locking members released by pressure applied thereto through a hollow supporting cable.
  • This invention is distinctive over this patent by providing a locking member extending across the opening of a U-shape formed in a support body when supporting a workpiece by connecting a manually operated control line to the locking member which is entrained over pulleys and exerts an axial thrust on the locking member for manual remote release of the latter.
  • a generally planar rectangular body is vertically disposed edgewise and provided with a bail projecting above its upper limit for receiving a hoist cable, or the like.
  • the depending edge portion of the body is provided with an inverted U-shaped slot having transverse apertures formed in the legs defining the U-shape slidably receiving one end portion of a locking member supported by the body and normally biased to project across the legs of the U-shape.
  • a manually operated control entrained around a roller and at least one pulley supported by the body, is connected with the locking member for retracting the latter and releasing a workpiece having an edge portion disposed within the body slot.
  • the principal object of this invention is to provide a hoist operated lifting and release apparatus for an elongated structural member which may be manually released by a workman on the ground when the apparatus is positioned at the upwardly disposed end of a structural member.
  • FIG. 1 is a perspective view of the apparatus in an exploded relation with respect to a fragment of the upper end portion of a structural member
  • FIG. 2 is a vertical cross-sectional view, partially in elevation, illustrating the apparatus connected to a fragment of a structural member.
  • the reference numeral 5 indicates the fragmentary upper end portion of a vertically disposed structural member, such as an H-beam, having a web 6 provided with a transverse aperture 7 adjacent the upper end of the beam.
  • the reference numeral 10 indicates a substantially rectangular planar body vertically disposed edgewise comprising a pair of spaced-apart plates 12 and 14 having a rod-like bar forming a bail l6 and having the end portions thereof interposed between and connected with the respective plates, as by welding, not shown.
  • the bail 16 receives a hoist cable 17.
  • the depending edge portion of the plates are transversely slotted to form a substantially inverted U-shaped slot 18 with a portion of the legs of the U-shape defined by a pair of cylindrical members 20 and 22 similarly secured to the depending edge limits of the plates in coaxial relation.
  • Each of the members 20 and 22 are line drilled to form a body aperture 24 for slidably receiving one end portion of a rod-like locking member 26.
  • the other end portion of the locking member 26 projects through and is slidably supported by an opening 28 formed in an end plate 30 transversely secured to the depending end portion of the plates 12 and 14 opposite the position of the slot 18.
  • the end plate 30 projects, at its respective ends, beyond the plane of the respective side surfaces formed by the body plates 12 and 14.
  • the end plate is provided with a pair of spaced-apart slots 32 for respectively receiving a peripheral portion of a pair of pulleys 34 journalled by an axle 36 secured to the end wall 30.
  • a pair of bars 38 are secured to an outer side surface of the respective plate 12 and 14 and the member 22 and depend from the body in parallel spaced relation.
  • a pin 40 extending between the depending end por tions of the bars, journals a roller 42.
  • a flexible line or strand 44 has its respective ends, only one being shown, secured to the respective end portion of a cotter pin 46 extending transversely through the locking member 26 with an intermediate portion of the strand 44 entrained over the respective pulleys 34 and the roller 42 thus forming a strand loop 48 by its medial portion which is entrained through a block 50.
  • the eye of the block is connected with one end of an elongated line 52 so that a manual pull on the other end of the line 52 axially moves the locking member 26 out of the U-shaped body slot 18.
  • a resilient member, such as a spring 54 interposed between the cotter pin 46 and the adjacent surface of the end wall 30, normally biases the locking member in an axial direction to extend one end portion across the legs of the body slot 18.
  • a keeper loop or rod-like ring 56 is secured to the end portion of the locking member projecting beyond the end wall 30 for frictional engagement with the adjacent surface of the end wall and maintaining the locking member in a retracted position with respect to the body slot 18 for ease in connecting the apparatus with a structural member before lifting the latter.
  • the apparatus is further provided with a rod-like handle 58 connected with the end plate 30 and bail 16 for manual manipulation of the apparatus in connecting it with a structural member.
  • the bail 16 is connected with the hoist line or cable 17 while the structural member 5 is generally horizontally disposed on the surface of the earth.
  • a workman positions the body slot 18, with the locking member 26 retracted, in straddling relation with respect to the H-beam flange 6 and aligns the apertures 24 with the l-l-beam flange aperture so that the locking member, when released, projects through the l-l-beam flange aperture and projects across the legs of the body slot 18.
  • the hoist lifts the beam to a desired location and while being lifted a workman holds or grasps the depending end portion of the line'52.
  • a manual pull on the line 52 retracts the locking member 26 out of engagement with the beam flange so that release of the apparatus 10 from the beam is achieved.
  • control line entrained around said pulley and operatively connected with said locking member for withdrawing said locking member from its position across the legs of the U-shape in response to a downward pull on the line;
  • a bail connected with said body opposite the opening of the U-shape slot for connection with a hoisting cable
  • roller extending between said bars and being journalled thereby for rotation about a horizontal axis normal to the plane of said body, the depending portion of said line adjacent said pulley being entrained over said roller.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)

Abstract

A generally rectangular body is vertically disposed edgewise and provided with a bail for connection with a hoisting cable. The depending edge portion of the body is provided with a transverse slot of generally U-shape. The legs forming the U-shape are transversely apertured for receiving a locking member adapted to be projected across the legs of the U-shape and engage an edge portion of a structural member to be lifted. Control means, connected with the locking member, retracts the latter to release the structural member from a remote location.

Description

United States Patent [191 Barnes 1 1 STRUCTURAL MEMBER LIFTING AND RELEASING DEVICE ['76] inventor: Eldridge Barnes, Rt. 4, Box 142,
Okemah, Okla. 74859 [22] Filed: Oct. 25, 1973 [21] Appl. No.: 409,549
[52] US. Cl. 294/83 R; 24/241 SL [51] Int. Cl. B66c 1/36 [58] Field of Search.... 294/78 R, 82 R, 83 R, 83 A,
24/2305 R, 230.5 S, 230.5 SA, 238. 239,
241 R, 241 SL [56] References Cited UNITED STATES PATENTS 411,860 10/1889 Hamaker 294/83 R 555,462 2/1896 Morrow. 294/83 R 294/83 R 294/82 R X 9/1916 Lyon 6/1930 Lotts [451 July 22,1975
1/1947 Dunn 294/83 R X 3/1972 Bauer 24/241 51..
Primary Examiner-Even C. Blunk Assistant Examiner-Johnny D. Cherry Attorney, Agent, or Firm-Robert K. Rhea [S '7 ABSTRACT A generally rectangular body is vertically disposed edgewise and provided with a bail for connection with a hoisting cable. The depending edge portion of the body is provided with a transverse slot of generally U- shape. The legs forming the U-shape are transversely apertured for receiving a locking member adapted to be projected across the legs of the U-shape and engage an edge portion of a structural member to be lifted. Control means, connected with the locking member, retracts the latter to release the structural member from a remote location.
1 Claim, 2 Drawing Figures BACKGROUND OF. THE INVENTION 1. Field of the invention.
The present invention relates to construction work and more particularly to a hoist and line operated lifting apparatus for positioning elongated structural members. i
Bridge and building piles usually comprise elongated structural members referred to as H-beams which are relatively long, from 70 to 90 feet in length, and must be vertically disposed within a hole or socket formed in the earth for later driving the beams further into the earth. Heretofore the H-beam has been lifted by a hoist, such as a crane, having a hook connected with the upper end portion of the beam thus necessitating a workman climbing the beam to release the hook before the pile driving action begins.
This invention overcomes this disadvantage by providing an apparatus engageable with one end portion of such a beam which may be released by workmen on the ground after the beam has been vertically disposed.
2. Description of the prior art.
Pat. No. 2,276,990 discloses a powder loading device including a hollow body provided with a downwardly open U-shaped slot in its depending surface for supporting a powder cartridge supporting ring by locking members released by pressure applied thereto through a hollow supporting cable.
This invention is distinctive over this patent by providing a locking member extending across the opening of a U-shape formed in a support body when supporting a workpiece by connecting a manually operated control line to the locking member which is entrained over pulleys and exerts an axial thrust on the locking member for manual remote release of the latter.
SUMMARY OF THE INVENTION A generally planar rectangular body is vertically disposed edgewise and provided with a bail projecting above its upper limit for receiving a hoist cable, or the like. The depending edge portion of the body is provided with an inverted U-shaped slot having transverse apertures formed in the legs defining the U-shape slidably receiving one end portion of a locking member supported by the body and normally biased to project across the legs of the U-shape. A manually operated control, entrained around a roller and at least one pulley supported by the body, is connected with the locking member for retracting the latter and releasing a workpiece having an edge portion disposed within the body slot.
The principal object of this invention is to provide a hoist operated lifting and release apparatus for an elongated structural member which may be manually released by a workman on the ground when the apparatus is positioned at the upwardly disposed end of a structural member.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of the apparatus in an exploded relation with respect to a fragment of the upper end portion of a structural member; and,
FIG. 2 is a vertical cross-sectional view, partially in elevation, illustrating the apparatus connected to a fragment of a structural member.
DESCRIPTION OF THE PREFERRED EMBODIMENT Like characters of reference designate like parts in those figures of the drawings in which they occur.
In the drawings:
The reference numeral 5 indicates the fragmentary upper end portion of a vertically disposed structural member, such as an H-beam, having a web 6 provided with a transverse aperture 7 adjacent the upper end of the beam.
The reference numeral 10 indicates a substantially rectangular planar body vertically disposed edgewise comprising a pair of spaced- apart plates 12 and 14 having a rod-like bar forming a bail l6 and having the end portions thereof interposed between and connected with the respective plates, as by welding, not shown. The bail 16 receives a hoist cable 17. The depending edge portion of the plates are transversely slotted to form a substantially inverted U-shaped slot 18 with a portion of the legs of the U-shape defined by a pair of cylindrical members 20 and 22 similarly secured to the depending edge limits of the plates in coaxial relation. Each of the members 20 and 22 are line drilled to form a body aperture 24 for slidably receiving one end portion of a rod-like locking member 26. The other end portion of the locking member 26 projects through and is slidably supported by an opening 28 formed in an end plate 30 transversely secured to the depending end portion of the plates 12 and 14 opposite the position of the slot 18. The end plate 30 projects, at its respective ends, beyond the plane of the respective side surfaces formed by the body plates 12 and 14. The end plate is provided with a pair of spaced-apart slots 32 for respectively receiving a peripheral portion of a pair of pulleys 34 journalled by an axle 36 secured to the end wall 30. A pair of bars 38 are secured to an outer side surface of the respective plate 12 and 14 and the member 22 and depend from the body in parallel spaced relation. A pin 40, extending between the depending end por tions of the bars, journals a roller 42. A flexible line or strand 44 has its respective ends, only one being shown, secured to the respective end portion of a cotter pin 46 extending transversely through the locking member 26 with an intermediate portion of the strand 44 entrained over the respective pulleys 34 and the roller 42 thus forming a strand loop 48 by its medial portion which is entrained through a block 50. The eye of the block is connected with one end of an elongated line 52 so that a manual pull on the other end of the line 52 axially moves the locking member 26 out of the U-shaped body slot 18. A resilient member, such as a spring 54, interposed between the cotter pin 46 and the adjacent surface of the end wall 30, normally biases the locking member in an axial direction to extend one end portion across the legs of the body slot 18.
A keeper loop or rod-like ring 56 is secured to the end portion of the locking member projecting beyond the end wall 30 for frictional engagement with the adjacent surface of the end wall and maintaining the locking member in a retracted position with respect to the body slot 18 for ease in connecting the apparatus with a structural member before lifting the latter. The apparatus is further provided with a rod-like handle 58 connected with the end plate 30 and bail 16 for manual manipulation of the apparatus in connecting it with a structural member.
Operation In operation the bail 16 is connected with the hoist line or cable 17 while the structural member 5 is generally horizontally disposed on the surface of the earth. A workman positions the body slot 18, with the locking member 26 retracted, in straddling relation with respect to the H-beam flange 6 and aligns the apertures 24 with the l-l-beam flange aperture so that the locking member, when released, projects through the l-l-beam flange aperture and projects across the legs of the body slot 18. Thereafter the hoist lifts the beam to a desired location and while being lifted a workman holds or grasps the depending end portion of the line'52. When the beam 5 is positioned as desired a manual pull on the line 52 retracts the locking member 26 out of engagement with the beam flange so that release of the apparatus 10 from the beam is achieved.
Obviously the invention is susceptible to changes or alterations without defeating its practicability, therean elongated reciprocable locking member having one end portion arranged to. be projected horizontally across the legs of the U-shape through the aperture;
at least one pulley mounted on said body beside the other end portion of said locking member;
an end plate transversely secured to one end of said body, said plate having an opening coaxial with the body aperture, said other end portion of said locking member being coaxially received slidably by the opening;
a resilient member normally biasing said one end of said locking member across the legs of the U- shape;
a control line entrained around said pulley and operatively connected with said locking member for withdrawing said locking member from its position across the legs of the U-shape in response to a downward pull on the line;
a bail connected with said body opposite the opening of the U-shape slot for connection with a hoisting cable;
a pair of bars secured to said body intermediate its ends in depending spaced relation; and,
a roller extending between said bars and being journalled thereby for rotation about a horizontal axis normal to the plane of said body, the depending portion of said line adjacent said pulley being entrained over said roller.

Claims (1)

1. An apparatus for hoist lifting and releasing an elongated structural member comprising: a generally planar body disposed in a vertical plane and having a transverse downwardly open slot in the general form of an inverted U for receiving an edge portion of the structural member to be lifted, said body having an aperture transversely intersecting the legs of the U-shape; an elongated reciprocable locking member having one end portion arranged to be projected horizontally across the legs of the Ushape through the aperture; at least one pulley mounted on said body beside the other end portion of said locking member; an end plate transversely secured to one end of said body, said plate having an opening coaxial with the body aperture, said other end portion of said locking member being coaxially received slidably by the opening; a resilient member normally biasing said one end of said locking member across the legs of the U-shape; a control line entrained around said pulley and operatively connected with said locking member for withdrawing said locking member from its position across the legs of the U-shape in response to a downward pull on the line; a bail connected with said body opposite the opening of the Ushape slot for connection with a hoisting cable; a pair of bars secured to said body intermediate its ends in depending spaced relation; and, a roller extending between said bars and being journalled thereby for rotation about a horizontal axis normal to the plane of said body, the depending portion of said line adjacent said pulley being entrained over said roller.
US409549A 1973-10-25 1973-10-25 Structural member lifting and releasing device Expired - Lifetime US3895836A (en)

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Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4216987A (en) * 1978-10-26 1980-08-12 Ely Robert G Safety shackle
DE2943623A1 (en) * 1979-10-29 1981-04-30 Josef 7611 Steinach Maier DEVICE FOR ATTACHING AT LEAST ONE CONTROL PANEL TO A CRANE
FR2488231A1 (en) * 1980-08-08 1982-02-12 Mueller L Soehne Bautech SHIELD HANDLING LOCKING DEVICE
FR2488232A1 (en) * 1980-08-08 1982-02-12 Mueller L Soehne Bautech Safety system for load lifting device - has shackle on lifting block, releasing locking pins when load contacts ground
WO1990014965A1 (en) * 1989-06-02 1990-12-13 British Guide Rails Limited Lifting shackle
US5108139A (en) * 1991-01-03 1992-04-28 Leech Kenneth E Device for remotely actuating the safety latch of a hoist hook
US5152567A (en) * 1991-10-31 1992-10-06 Raber Cecil Y Safety release hoisting shackle
US5580113A (en) * 1995-06-05 1996-12-03 Magnum Construction Company, Inc. Remote control crane/load safety shackle
WO1997045360A2 (en) * 1996-05-30 1997-12-04 Marler Joseph E Novel release latch
US5791710A (en) * 1996-05-30 1998-08-11 Marler; Joseph E. Apparatus for latching and unlatching a load suspended from a lifting line
WO1998047807A1 (en) * 1997-04-24 1998-10-29 Marler Joseph E Novel release latch cip ii
US6089634A (en) * 1999-02-26 2000-07-18 Walters Inc. Safety lifting device
US6499779B2 (en) * 2000-07-18 2002-12-31 Windmoeller & Hoelscher Crane gear for the transport of web rolls
US7032943B1 (en) * 2005-02-03 2006-04-25 Marler Joseph E Apparatus with a locking mechanism for the latching and unlatching of a load
US20060087137A1 (en) * 2004-10-25 2006-04-27 The Caldwell Group, Inc. Remote release apparatus and method for lifting and releasing a load
US20070272643A1 (en) * 2006-05-24 2007-11-29 Hailstone Chris D Crane spreader beam having radio-controlled load release
US9327944B2 (en) 2011-11-30 2016-05-03 Liebherr-Werk Biberach Gmbh Apparatus for assembling or dismantling a crane
US9366276B1 (en) * 2013-03-29 2016-06-14 G8R, Llc Uplift and lateral restraint system to secure a drilling rig to an offshore platform
US10259691B1 (en) * 2017-12-29 2019-04-16 Yoke Industrial Corp. Hoist ring with engageable retainer

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US411860A (en) * 1889-10-01 Trip-hook for hay-elevators
US555462A (en) * 1896-02-25 Tripping attachment for cane-lifts
US1198139A (en) * 1916-03-20 1916-09-12 Robert N Lyon Trip-hook.
US1768484A (en) * 1930-06-24 Williams
US2414725A (en) * 1945-04-05 1947-01-21 Joseph D Dunn Hitch release
US3646645A (en) * 1969-10-30 1972-03-07 Kdj Bauer Corp Locking device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US411860A (en) * 1889-10-01 Trip-hook for hay-elevators
US555462A (en) * 1896-02-25 Tripping attachment for cane-lifts
US1768484A (en) * 1930-06-24 Williams
US1198139A (en) * 1916-03-20 1916-09-12 Robert N Lyon Trip-hook.
US2414725A (en) * 1945-04-05 1947-01-21 Joseph D Dunn Hitch release
US3646645A (en) * 1969-10-30 1972-03-07 Kdj Bauer Corp Locking device

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4216987A (en) * 1978-10-26 1980-08-12 Ely Robert G Safety shackle
DE2943623A1 (en) * 1979-10-29 1981-04-30 Josef 7611 Steinach Maier DEVICE FOR ATTACHING AT LEAST ONE CONTROL PANEL TO A CRANE
FR2468540A1 (en) * 1979-10-29 1981-05-08 Maier Josef DEVICE FOR HANGING AT LEAST ONE FORMWORK PANEL FROM THE HOOK OF A CRANE
FR2488231A1 (en) * 1980-08-08 1982-02-12 Mueller L Soehne Bautech SHIELD HANDLING LOCKING DEVICE
FR2488232A1 (en) * 1980-08-08 1982-02-12 Mueller L Soehne Bautech Safety system for load lifting device - has shackle on lifting block, releasing locking pins when load contacts ground
US5116341A (en) * 1989-06-02 1992-05-26 British Guide Rails Limited Lifting shackle
WO1990014965A1 (en) * 1989-06-02 1990-12-13 British Guide Rails Limited Lifting shackle
US5108139A (en) * 1991-01-03 1992-04-28 Leech Kenneth E Device for remotely actuating the safety latch of a hoist hook
US5152567A (en) * 1991-10-31 1992-10-06 Raber Cecil Y Safety release hoisting shackle
US5580113A (en) * 1995-06-05 1996-12-03 Magnum Construction Company, Inc. Remote control crane/load safety shackle
WO1997045360A2 (en) * 1996-05-30 1997-12-04 Marler Joseph E Novel release latch
WO1997045360A3 (en) * 1996-05-30 1998-02-05 Joseph E Marler Novel release latch
US5762389A (en) * 1996-05-30 1998-06-09 Marler; Joseph E. Apparatus for latching and unlatching a load suspended from a lifting line
US5791710A (en) * 1996-05-30 1998-08-11 Marler; Joseph E. Apparatus for latching and unlatching a load suspended from a lifting line
US6024394A (en) * 1996-05-30 2000-02-15 Marler; Joseph E. Apparatus with a centering member for latching and unlatching a load suspended from a lifting line
GB2335907A (en) * 1997-01-08 1999-10-06 Joseph E Marler Novel release latch-c-i-p
WO1999025637A1 (en) * 1997-01-08 1999-05-27 Marler Joseph E Novel release latch - c-i-p
GB2335907B (en) * 1997-01-08 2001-04-04 Joseph E Marler Release latch mechanism
GB2339418A (en) * 1997-04-24 2000-01-26 Joseph E Marler Novel release latch CIP II
WO1998047807A1 (en) * 1997-04-24 1998-10-29 Marler Joseph E Novel release latch cip ii
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