Classifications

• • 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
  • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
  • F16G15/00—Chain couplings, Shackles; Chain joints; Chain links; Chain bushes

Definitions

• This invention relates to chain components and, more particularly, to a main link which provides a connection between a main hoist cable or chain and a plurality of chain or cable legs forming a sling.
• main links for chain or wire rope slings it is normal for main links for chain or wire rope slings to be of oval shape.
• the oval shape ensures that the maximum line of force passes through the centre line of the two opposing crowns of the link and because of the oval shape, stress distribution is more favourable than in the case of a ring with the result that there is a reduction of maximum stresses.
• the two crowns of the oval link are subjected during use to curved beam stresses and they require maximum modulus of section to resist bending stresses which are set up by proof loads.
• an elongate main link for a chain or cable sling including crown portions of generally semi-circular form connected by parallel extending side portions, wherein crown portions are formed with inner and outer, circumferentially extending, flanges connected by a web and the side portions are formed with an inner flange connected to an outwardly extending web.
• the crown portions 4 are formed with inner and cuter, circumferentially extending, flanges S and 10 connected by a web 12 extending parallel to a diametrical plane lying centrally of the crowns.
• the side portions 6 are formed with an inner flange 14 connected to a web 16 extending outwardly from the flange parallel to the aforesaid diametrical plane.
• the inner flange 16 of the side portions is.substantially identical in cross-section with the inner, circunf ⁇ rentially extending, flange 8 of the crown portions 4, and the web 16 of the side-portions is substantially identical in thickness, perpendicular to the aforesaid diametrical plane, with the web 12 of the crown portions.
• the outer, circumferentially extending, flange 10 of the crown portions 4 is reduced progressively in thickness, perpendicular-to the aforesaid diametrical plane, over 30° sectors of the crown portions adjoining the side portions to correspond in thickness to the web of the side portions, and the radius of curvature decreases slightly such that the width, in the aforesaid diametrical plane, across the inner flange and web of each of the side portions is less than the width across the inner and outer flanges of each of the crown portions, in central regions thereof.
• Central regions 18 of the inner flanges of the side portions are thinned down slightly, perpendicular to the aforesaid diametrical plane, to permit passage of jaw portions of clevis connectors (not shown) for attachment to the main link.
• the various flanges are shaped to have advantageous bending moduli in relation to cross-sectional area, the cross-sectional peripheries being formed with merging curves, giving a generally rounded shape.
• the cross-section of the crown portions 4 with flanges 8 and 10 By designing the cross-section of the crown portions 4 with flanges 8 and 10 such that the bulk of material is disposed toward the inner and outer surfaces a bending modulus of sufficient strength may be obtained with a reduction in material conpared with a cross-section of constant thickness.
• the cross-section of the side portions 6 is designed to be of sufficient area as to give the requisite tensile strength whilst merging smoothly, without giving rise to localised stress concentration under load, with the crown portions.
• the generally rounded form of the crosssections also serves to avoid localised stressconcentrations under load.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Load-Engaging Elements For Cranes (AREA)
• Lubricants (AREA)
• Detergent Compositions (AREA)
• Ropes Or Cables (AREA)
• Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
• Non-Insulated Conductors (AREA)
• Installation Of Indoor Wiring (AREA)
• Storage Of Web-Like Or Filamentary Materials (AREA)
• Package Frames And Binding Bands (AREA)
• Supports For Plants (AREA)
• Laying Of Electric Cables Or Lines Outside (AREA)
• Vehicle Body Suspensions (AREA)
• Mutual Connection Of Rods And Tubes (AREA)
• Drying Of Semiconductors (AREA)
• Glass Compositions (AREA)
• Control Of Motors That Do Not Use Commutators (AREA)
• Valve Device For Special Equipments (AREA)
• Emergency Lowering Means (AREA)
• Adhesives Or Adhesive Processes (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=10525018

Family Applications (1)

Country Status (14)

Families Citing this family (18)

Citations (4)

Family Cites Families (7)

• 1982
  • 1982-10-07 EP EP82305336A patent/EP0076707B1/en not_active Expired
  • 1982-10-07 IN IN742/DEL/82A patent/IN159069B/en unknown
  • 1982-10-07 DE DE8282305336T patent/DE3275116D1/de not_active Expired
  • 1982-10-07 AU AU89538/82A patent/AU548133B2/en not_active Ceased
  • 1982-10-07 CA CA000413004A patent/CA1179152A/en not_active Expired
  • 1982-10-07 JP JP57502880A patent/JPS58501684A/ja active Pending
  • 1982-10-07 ZA ZA827349A patent/ZA827349B/xx unknown
  • 1982-10-07 AT AT82305336T patent/ATE24955T1/de not_active IP Right Cessation
  • 1982-10-07 WO PCT/GB1982/000287 patent/WO1983001285A1/en active IP Right Grant
  • 1982-10-07 US US06/503,148 patent/US4497169A/en not_active Expired - Fee Related
  • 1982-10-07 ES ES1982277045U patent/ES277045Y/es not_active Expired
• 1983
  • 1983-02-28 DK DK101883A patent/DK155343C/da not_active IP Right Cessation
  • 1983-05-31 NO NO831945A patent/NO151677C/no unknown
  • 1983-11-03 FI FI834043A patent/FI71822C/fi not_active IP Right Cessation

Patent Citations (4)

Also Published As

Similar Documents

Legal Events