US2838336A - Rope sling - Google Patents

Rope sling Download PDF

Info

Publication number
US2838336A
US2838336A US480404A US48040455A US2838336A US 2838336 A US2838336 A US 2838336A US 480404 A US480404 A US 480404A US 48040455 A US48040455 A US 48040455A US 2838336 A US2838336 A US 2838336A
Authority
US
United States
Prior art keywords
rope
pulley
hook
sling
guide member
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
US480404A
Other languages
English (en)
Inventor
Archer Jean Francois
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
Application granted granted Critical
Publication of US2838336A publication Critical patent/US2838336A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B66C1/12—Slings comprising chains, wires, ropes, or bands; Nets

Definitions

  • This invention relates to lifting slings and more particularly to a sling capable of lifting a load substantially vertically and without lateral displacement regardless of the position of the center of gravity of the load with respect to the apex of the sling spans.
  • an adjustable sling of the kind which comprises a pulley or pulley element over which a rope is passed with means for immobilising the-rope relative to the pulley or pulley element.
  • the principal object of the present invention is to provide a new and improved sling of the above-mentioned kind, whichv is of simpler construction and is more elicient in operation than the known types. 7 J
  • the sling comprises ajline guide and support member which is so formed as to enable it to' be engaged directly by a hooked member, for example the hook of a lifting apparatus, and means forprejventingrotation of the support relative to the said hooked member, the arrangement being such that, when the line is supporting a load, it is immobilised relative to the support.
  • a hooked member for example the hook of a lifting apparatus
  • the means for preventing the relative dis placement comprises a stop which is provided on the support and is adapted to abut the lifting hook.
  • the said stop may be also adapted to immobilise the rope or cable by virtue of the fact that it is caused to move into contact with and press the latter against the support, the latter may consist of a pulley or an arcuate or rounded member.
  • the support may comprise a pulley to which the stop is fixed in such a position that upon loading a rope or chain preferably being so wound around the pulley as to provide at least one complete or dead turn so that when the said tape or chain is not taut it may be moved around the pulley to enable the sling, to be ad justed upon the hook member, but is immobilised automatically by the friction created between it and the throat of the pulley, upon commencing to lift an article.
  • the stop may be movably mounted upon the rope, chain or cable support, and its path of movement may extend at least to the rope or chain being displaced into contact with the hooked member automatically as the hoist is operated to lift a load; in such circumstances; the support'need not consist of a complete pulley and the rope or chain need only be passed over the sup port since the former is gripped between the stop and the support, and is thereby immobilised, when the stopis brought into contact and engagement therewith.
  • the rope 'orchain is loaded it is movable relative' to the support to permit. Adjust of the sling; however, whether the stop is fixed to or movable upon the support, means may be provided so that when, for example, a succession of identical or substantially identical articles are to be lifted, the rope or chain may be immobilised permanently.
  • the stop may comprise at least one pivotal member which is mounted on the support and is adapted to abut the hooked member so as to immobilise the support relative to the said member, the said pivotal member being engageable bythe hooked member and having, at least in its hook-engaged part, a curved area of a radius less than the radius of that part of the support over which the rope or chain is passed, the sling comprising means operable by realtive movement between the pivoted memher and the support, for immobilising the rope or chain and comprising, for example, one or more rope-gripping fingers or shoes.
  • the rope or chain support may be formed with an opening through which the hook passes and at least the hook-contacting portion of which is curved, its center of curvature being situated below the center of curvature of the support portion over which the rope or chain is passed.
  • the rope or chain immobilising means may comprise a flexible or articulated helical member through which the said rope or chain may be passed.
  • FIG. 1 is a front elevation view of a sling constructed according to the invention.
  • Fig. 2 is a side elevation view of the sling shown in Fig. 1.
  • Fig. 3 is a diagram illustrative of the manner in which the sling functions when lifting a load.
  • Fig. 4 is a front elevation view of another embodiment of the sling according to the invention.
  • Fig. 5 is a side elevation view of the sling shown in Fig. 3.
  • Fig. 6 is a plan view, partly in section, of the sling shown in Fig. 3.
  • Fig, 7 is a front elevation view of a variant of the sling according to the invention.
  • Fig. 9 is a front elevation view of still another variant of the sling according to the invention.
  • the sling shown in Figs. 1 and 2- comprises an annular pulley 1 of which, as indicated, the eye is adapted to be engaged by a hook 2 or a lifting apparatus and around the hub of which a rope 3 is so wound as to form one complete or dead turn as shown.
  • the flanges or cheeks of the pulley are transversed by arod 4 which is adapted to abut across the hook 2 as shown when the pulley turns or rotates about the hook while lifting a load; the rod therefore acts as a stop which prevents the pulley from continuing its rotational movement.
  • the rope or line When the. rope or line is slack, it is capable of turning freely around the pulley hub to enable the sling tobe adjusted or set preparatory to lifting an article or load in a manner which ensures that the article remains up right andis kept from swinging horizontally so as to be to an articles (Fig. 3) to be lifted.
  • the rope is made taut and tightens around the pulley; thefriction of the rope on thepulley' automatically prevents the rope from turning about the.
  • the posi- Ptitented June 10, 1958 tion of the sling from which the article is suspended in a horizontal position may not correspond to that in which the pulley 1 is so located that the center of the pulley, the center of gravity of the article, and the point of con tact between the pulley and hook are in the same vertical plane.
  • a couple is applied to the pulley so that the latter tends to turn about its point of contact with the book 2 and move the article from the desired horizontal and upright position.
  • this turning movement is prevented by the stop 4 coming into abutment with the side of the hook as soon as any such relative movement is set up between the pulley and hook.
  • the rope 3 is therefore immobilised and the article 5 remains upright.
  • a single stop is therefore sufiicient. Nevertheless, two stops may be provided and may be spaced apart by an angular distance of, for example, 45 to 90, the hook being engaged with the pulley between the said stops.
  • two bellcrank levers 14 are pivoted between the pulley flanges about axes 15; the upper or free end of one arm of each lever consists of a rope-immobilising shoe 17.
  • the relative lengths of the arms of each lever it is possible to increase or decrease the force exerted on the rope by the shoe 17 when in its immobilising position.
  • the lifting hook is invariably of a much smaller cross section in the vicinity of its tip or nose than in the vicinity of its shank or heel, it is also advantageous that the stops should be adapted to assume positions which are inclined relatively to the plane of the book when brought into abutment with the latter, at the same time assuring that they remain normal to the plane of the pulley so that there is no risk that they will escape abutting the hook in the vicinity of the said nose.
  • each stop 16 is of strip-like form and extends through an opening 18 formed in the upper part of the corresponding lever arm, the said opening being of a width greater than the width of the stop but of a depth sub stantially equal to the thickness of the said stop.
  • the stops are therefore maintained in positions normal to the plane of the pulley but may be inclined, as indicated in Fig. 6, relatively to the vertical plane of the hook.
  • Pins 19 provided on the stops on the opposite sides of their respective levers, prevent the said stops from removal from the openings.
  • the sling comprises a pulley 1 through the throat of which the rope passes and which is formed with an eccentric hook-rcceiving aperture 37.
  • the rope is wound into a complete or dead turn around the pulley hub.
  • FIG. 8 wherein is shown an alternative construction having two members 39 releasably engaging the book as shown and pivotally connected by pivot pin 38 on opposite sides of a semi-circular or arcuate support member 42 replacing the pulley of the other embodiments.
  • the members 39 are provided with pins 40 extending between members 39 and overlying the rope 3 as shown.
  • the member 42 tends to pivot about axis 38 whereupon one of the pins 40 makes contact with the rope releasably clamping the rope between -itself and support 42.
  • the members 39 preclude movement of the support member 42 relative to the lifting hook.
  • the rope support comprises two spaced and parallel side plates 67, which are interconnected by an intermediate portion 68 over which the rope is passed, and by a helical blade spring 69 through which the rope also passes; hence, when subjected to a load, the rope extends the spring and reduces the area of the coils thereof, so that the rope is immobilised relatively to the support.
  • the improved sling is simple in construction and eflicient in operation, and no height is lost since the hook of the lifting apparatus is adapted to be engaged in the rope support.
  • a sling comprising a guide member for supporting and guiding a line having spans to be attached to a load to be lifted, said guide member having an aperture so as to be releasably engageable by a lifting hook, said aperture being arcuate in configuration and of a dimension permitting rotational movement between said hook and said line guide member, means on said guide member for releasably engaging said hook for keeping said guide member from rotating relative to the hook when lifting a load, means disposed on the guide member for engaging the line to releasably hold the line on said guide member so as to stop relative movement between the line and said guide member, said means for keeping the guide member from rotating relative to the hook being constructed and positioned on said guide member for precluding rotation of said guide member on the hook to be releasably engageable by a lifting hook, said aperture being afcuate in configuration and of a dimension permitting rotational movement between said hook.
  • a sling comprising, a guide member having means defining a first arcuate surface for supporting and guiding a line having span to be attached to a load to be lifted and defining a second arcuate surface releasably 6 engageable by a lifting hook, the second arcuate surface having a configuration and a dimension permitting rotational movement between said hook and said line guide member, means on said guide member engaging said hook for stopping and keeping said guide member from rotating relative to the hook when lifting a load, means on said guide member for releasably holding the line on said guide member to preclude relative movement between the line and said guide member, said second arcuate surface releasably engageable by the hook being positioned beneath an apex formed by spans of said line, whereby when a load is applied the weight of the load is distributed on the spans of the line and the load can be picked up substantially without swinging laterally of said hook and in a selected upright position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)
US480404A 1954-01-12 1955-01-07 Rope sling Expired - Lifetime US2838336A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1098184T 1954-01-12

Publications (1)

Publication Number Publication Date
US2838336A true US2838336A (en) 1958-06-10

Family

ID=9619005

Family Applications (1)

Application Number Title Priority Date Filing Date
US480404A Expired - Lifetime US2838336A (en) 1954-01-12 1955-01-07 Rope sling

Country Status (4)

Country Link
US (1) US2838336A (pt)
FR (4) FR1098184A (pt)
GB (1) GB805264A (pt)
NL (1) NL193933A (pt)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3193880A (en) * 1962-12-28 1965-07-13 Hawkinson Paul E Co Tire retreading mold and lifting means therefor
US3733053A (en) * 1970-05-14 1973-05-15 G Haulotte Pulley blocks for hoisting
US4097083A (en) * 1977-06-15 1978-06-27 Roberton & Schwartz, Inc. Adjustable lifting thimble
US5836632A (en) * 1997-07-29 1998-11-17 Jerry M. Ball Load balancing lifting apparatus
DE102022002826A1 (de) 2022-08-04 2024-02-15 Heinrich Burgmer Last- Hebe-System ( LHS) / Last- Hebe-Wende-System ( LHWS) /Drehmoment- Differenz-Waage ( DDW) / Drehmoment- Differenz-Waage mit Bremssystem ( DDW*) und Universal- Last-Hebe-System ( ULHS*)
CN117886203A (zh) * 2024-02-28 2024-04-16 国网江苏省电力有限公司宿迁供电分公司 一种用于安装电力变压器的吊装装置

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2460413A2 (fr) * 1975-11-28 1981-01-23 Stas Soc Tech Access Spec Cosse pour elingue
FR2409224A1 (fr) * 1977-11-22 1979-06-15 Alsthom Atlantique Appareil de manutention equilibreur a auto-serrage pour le levage de charges
FR2411794A1 (fr) * 1977-12-15 1979-07-13 Stas Elingue a cable, de longueur reglable
FR2478764A1 (fr) * 1980-03-21 1981-09-25 Stas Soc Tech Access Spec Piece de liaison d'elingues ou boucles d'elingues
DE10100993C2 (de) * 2001-01-10 2003-04-10 Spanset Inter Ag Oetwil Am See Einrichtung zum Verstellen der Länge eines als Endlosschlinge ausgebildeten Anschlagmittels und Vorrichtung zum Heben von Lasten
CN110884991A (zh) * 2019-11-22 2020-03-17 一汽解放汽车有限公司 一种便于装配的吊装调整装置
CN111676841B (zh) * 2020-06-23 2021-03-09 华中科技大学 一种防脱索体外预应力钢索转向器
CN113252225A (zh) * 2021-04-13 2021-08-13 武汉纺织大学 一种集束张力检测系统

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2354280A (en) * 1943-04-14 1944-07-25 Macwhyte Company Thimble
US2356147A (en) * 1943-03-11 1944-08-22 Leslie M Caldwell Self-equalizing sling
US2463240A (en) * 1943-03-11 1949-03-01 Leslie M Caldwell Sling
US2464319A (en) * 1945-10-26 1949-03-15 Kleve H Edward Automatic wire cable grip
US2515571A (en) * 1948-11-15 1950-07-18 Siler Sling Corp Sling clamp
US2629625A (en) * 1949-05-20 1953-02-24 Mortimer J Phillips Adjustable lift chain for hoists
US2661231A (en) * 1948-08-25 1953-12-01 Leslie M Caldwell Sling
FR1098104A (fr) * 1954-01-06 1955-07-18 Soc Tech De Rech Ind Projectile

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2356147A (en) * 1943-03-11 1944-08-22 Leslie M Caldwell Self-equalizing sling
US2463240A (en) * 1943-03-11 1949-03-01 Leslie M Caldwell Sling
US2354280A (en) * 1943-04-14 1944-07-25 Macwhyte Company Thimble
US2464319A (en) * 1945-10-26 1949-03-15 Kleve H Edward Automatic wire cable grip
US2661231A (en) * 1948-08-25 1953-12-01 Leslie M Caldwell Sling
US2515571A (en) * 1948-11-15 1950-07-18 Siler Sling Corp Sling clamp
US2629625A (en) * 1949-05-20 1953-02-24 Mortimer J Phillips Adjustable lift chain for hoists
FR1098104A (fr) * 1954-01-06 1955-07-18 Soc Tech De Rech Ind Projectile

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3193880A (en) * 1962-12-28 1965-07-13 Hawkinson Paul E Co Tire retreading mold and lifting means therefor
US3733053A (en) * 1970-05-14 1973-05-15 G Haulotte Pulley blocks for hoisting
US4097083A (en) * 1977-06-15 1978-06-27 Roberton & Schwartz, Inc. Adjustable lifting thimble
US5836632A (en) * 1997-07-29 1998-11-17 Jerry M. Ball Load balancing lifting apparatus
DE102022002826A1 (de) 2022-08-04 2024-02-15 Heinrich Burgmer Last- Hebe-System ( LHS) / Last- Hebe-Wende-System ( LHWS) /Drehmoment- Differenz-Waage ( DDW) / Drehmoment- Differenz-Waage mit Bremssystem ( DDW*) und Universal- Last-Hebe-System ( ULHS*)
CN117886203A (zh) * 2024-02-28 2024-04-16 国网江苏省电力有限公司宿迁供电分公司 一种用于安装电力变压器的吊装装置

Also Published As

Publication number Publication date
FR65648E (pt) 1956-02-29
NL193933A (pt)
FR69162E (fr) 1958-10-22
FR1098184A (fr) 1955-07-19
GB805264A (en) 1958-12-03
FR70273E (fr) 1959-03-27

Similar Documents

Publication Publication Date Title
US2838336A (en) Rope sling
US3820752A (en) Adjustable articulated support arm
US4557515A (en) Coil handling device
US2412555A (en) Plate grapple
US4251099A (en) Automatic release device for lifting slings
US2080700A (en) Line grip
US4438905A (en) Device for mounting and dismounting chain blocks
US3998487A (en) Device for the automatic release of a chain
US2646305A (en) Fulcrum grab
US2761394A (en) Hook holder
US3042374A (en) Steel and aluminum pulley block
NO123332B (pt)
US4210352A (en) Hoisting apparatus
US3199161A (en) Releasable catch apparatus for a cableway load carrier
US2815242A (en) Counterbalanced and weight operated tongs
US3897969A (en) Grapple
US2949617A (en) Ships' lifeboat davits
US1386583A (en) Hoisting-hook
US2515666A (en) Device for lifting bricks and the like
US4524874A (en) Tower crane with overbooming protection
US2335214A (en) Load supporting device
US2882551A (en) Mechanism for lowering meat-carrying hooks from overhead tracks
US4418953A (en) Material handler
US3952886A (en) Arrangement for stabilizing an aircraft during loading and unloading operations
US2803364A (en) Crane mounted log tongs