# US 4,378,875 A · Sling belt bulk material conveyor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 4,378,875 A - Document ID: US4378875A - Status: Granted - Kind: A - Application number: 06/217,587 - Filed: 1980-12-18 - Granted: 1983-04-05 - Earliest claimed: 1980-12-18 - Assignees: Allis-Chalmers Corporation - Inventors: Kenneth N. Allan; Thomas J. Worringer; Robert T. Baugh - Web page: https://patentgrep.com/patent/US4378875A ## CPC - B65G 17/02: comprising a load-carrying belt attached to or resting on the traction element - B65G 2201/04: Bulk - B65G: TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS (packaging B65B; handling thin or filamentary materials, e.g. paper sheets or thread, B65H; cranes B66C; portable mobile or lifting or hauling appliances, e.g. hoists, B66D; devices for lifting or lowering goods for loading or unloading purposes, e.g. fork-lift trucks, B66F9/00; emptying bottles, jars, casks, barrels or similar containers, not otherwise provided for, B67C9/00; delivering or transferring liquids B67D; filling or discharging vessels for liquefied, solidified or compressed gases F17C; pipe-line systems for fluids F17D) ## Abstract A sling belt conveyor has a pair of individually tensioned cables (209, 224) with transverse slings (51) pivotally connected to the cables (209, 224) which support a low tension conveyor belt (61) without being connected thereto. The belt (61) extends beyond the path of the support cables (209, 224) and is tensioned independently of the latter. ## Claims ### Claim 1 A conveyor including a pair of endless support cables each having a forwarding run and a return run between longitudinally spaced tail and head ends of said conveyor, said forwarding runs being substantially coextensive and situated at substantially the same elevation and support means supporting said support cables for respective movement along endless paths described by said support cables, said conveyor characterized by a plurality of transverse slings arranged at longitudinally spaced intervals along said endless support cables each sling including an intermediate flexible transverse strap and a pair of relatively rigid hangers with first corresponding ends connected, respectively, to the opposite transverse ends of said strap and second corresponding ends pivotally connected, respectively, to said support cables at fixed transversely aligned points therealong for pivotal movement about axes transverse to the axes of said cables, an endless flexible conveyor belt having a working run and a return run said working run being supported without attachment on said straps in the forwarding run of said support cables, end rollers supporting said endless belt at the opposite ends of said conveyor, and intermediate rollers at spaced intervals supporting the return run of said conveyor belt. ### Claim 2 (depends on 1) The conveyor of claim 1 wherein said end roller at one end of said conveyor is disposed a substantial distance in the longitudinal direction of the conveyor beyond the path of said support cables. ### Claim 3 (depends on 2) The conveyor of claim 2 wherein said end roller at the other end of said conveyor is disposed a substantial distance in the longitudinal direction of the conveyor beyond the path of said support cables. ### Claim 4 (depends on 1) The conveyor of claim 1 and further comprising end sheaves at opposite ends of said conveyor for each of said support cables, a first tensioning means operatively associated with one of said support cables and a second tensioning means operatively associated with the other of said support cables, said first and second tensioning means being independently operable to individually tension said support cables. ### Claim 5 (depends on 4) The conveyor of claim 4 and further comprising third tensioning means operatively associated with said conveyor belt for tensioning the latter independently of tensioning of said support cables. ### Claim 6 (depends on 4, 5) The conveyor of claims 4 or 5 wherein said first and second tensioning means are connected, respectively, to said end sheaves for said support cables at one end of said conveyor. ### Claim 7 (depends on 4, 5) The conveyor of claims 4 or 5 wherein said third tensioning means is connected to the end roller for said conveyor belt at the beginning of the working run of the latter. ### Claim 8 (depends on 5) The conveyor of claim 5 wherein said first, second and third tensioning means are at one end of said conveyor. ### Claim 9 (depends on 8) The conveyor of claim 8 wherein said one end of said conveyor is the tail end of said conveyor. ### Claim 10 A conveyor including a pair of endless support cables each having a forwarding run and a return run between longitudinally spaced tail and head ends of said conveyor, said forwarding runs being substantially coextensive and situated at substantially the same elevation and support means supporting said support cables for respective movement along endless paths described by said support cables, said conveyor characterized by a plurality of transverse slings arranged at longitudinally spaced intervals along said endless support cables, each sling including an intermediate flexible transverse strap and a pair of rigid hangers with first corresponding ends connected, respectively, to the opposite transverse ends of said strap for pivotal movement about longitudinally disposed axes and second corresponding ends pivotally connected, respectively, to fixed transversely aligned points on said support cables by pivot means for pivotal movement relative to said cables, and an endless flexible conveyor belt having a working run and a return run, said working run being supported by said straps without attachment thereto in the forwarding run of said support cables. ### Claim 11 A conveyor including a pair of endless support cables each having a forwarding run and a return run between longitudinally spaced tail and head ends of said conveyor, said forwarding runs being substantially coextensive and situated at substantially the same elevation and support means supporting said support cables for respective movement along endless paths described by said support cables, said conveyor characterized by a plurality of transverse slings arranged at longitudinally spaced intervals along said endless support cables, each sling including an intermediate flexible transverse strap and a pair of rigid hangers with first corresponding ends connected, respectively, to the opposite transverse ends of said strap and second corresponding ends pivotally connected, respectively, to fixed transversely aligned points on said support cables by pivot means for pivotal movement about axes generally transverse to the axes of said cables, and an endless flexible conveyor belt having a working run and a return run, said working run being supported by said straps without attachment thereto in the forwarding run of said support cables.