Automatic tailgate for a dump truck

• US 4,323,279 A
• Filed: 05/05/1980
• Issued: 04/06/1982
• Est. Priority Date: 05/05/1980
• Status: Expired due to Term

• Current Assignee: PayHauler Corp. (Terex Corporation)
• Original Assignee: International Harvester Co. (CNH Industrial N.V.)
• Inventors: Domes, E. A., Taylor, Forrest C., Vacval, Dusan M., Venere, Lawrence A.
• Primary Examiner(s): Paperner, Leslie J.
• Application Number:
  US06/146,976
• Time in Patent Office: 701 Days
• Field of Search: 298/6, 298/7, 298/8 R, 298/8 T, 298/23 R, 298/23 D, 298/23 DF, 298/23 MD, 298/23 S, 298/23 C, 296/56, 296/184, 105/261 A, 414/472, 414/493, 414/519, 414/520, 414/521
• US Class Current: 298/23.0DF
• CPC Class Codes: B60P 1/26 Means for controlling movement of tailboards or sideboards open loading compartments with movable sideboards or tailgates B62D33/027

Abstract

A dump truck is provided with a tailgate pivotably mounted to the exterior of the dump body. The tailgate fits into the body between the body sidewalls at a position inboard of the extreme end of the body. The tailgate pivots up and away from the body when the body is hoisted to a dumping mode.

Claims

1. In an off highway dump truck having a frame supported on a front and a rear axle, a dump body pivotally supported on said frame, said body having left and right sidewalls, a floor and an open end, said body capable of being pivoted from a transport mode to a dumping mode, an automatic tailgate comprising:

a pair of anchor cable outriggers attached to said frame, one of said pair of anchor cable outriggers located on the left side of said dump truck and a second of said pair of anchor cable outriggers located on the right side of said dump truck;

a pair of anchor cables, one of each of said pair attached to one of each of said anchor cable outriggers;

a left side support arm having a cable attachment point at one end thereof, a second end, and an attachment fitting between said first and second ends to which one of said anchor cables is attached;

a first pivot pin intergral with a plate attached to the exterior of said left sidewall of said dump body, said left side support arm pivotally supported through said attachment fitting to said first pivot pin;

a right side support arm having a cable attachment point at one end thereof, a second end and an attachment fitting between said first and second ends to which a second of said pair of anchor cables is attached;

a second pivot pin integral with a plate attached to the exterior of said right sidewall of said dump body, said right side support arm pivotally supported through said attachment fitting to said second pivot pin;

a tailgate carried by said left and right side support arms at said second ends thereof, said tailgate having a transverse beam affixed at each end thereof to said left and right support arms respectively, a plate fastened to said transverse beam and having a bottom edge and side edges, said side edges significantly inboard of said ends of said transverse beam, whereby said tailgate projects into said body inboard of said sidewalls.

2. In an off highway dump truck having a frame supported on a front and a rear axle, a dump body pivotally supported on said frame, said body having side walls, a floor and an open end, said body capable of being pivoted from a transport mode to a dumping mode, an automatic tailgate comprising:

a pair of anchor cable outriggers attached to said frame, one of said pair of anchor cable outriggers located on the left side of said dump truck and a second of said pair of anchor cable outriggers located on the right side of said dump truck;

a pair of anchor cables, one of each of said pair attached to one of each of said anchor cable outriggers;

a left side support arm having a cable attachment point at one end thereof, a second end, and an attachment fitting between said first and second ends to which one of said anchor cables is attached;

a first pivot pin integral with a plate attached to a side wall of said dump body, said left side support arm pivotally supported through said attachment fitting to said first pivot pin;

a right side support arm having a cable attachment point at one end thereof, a second end and an attachment fitting between said first and second ends to which a second of said pair of anchor cables is attached;

a second pivot pin integral with a plate attached to a side wall of said dump body, said right side support arm pivotally supported to said attachment fitting to said second pivot pin;

a tailgate carried by said left and right side support arms at said second ends thereof, said tailgate projecting into said body inboard of said side walls inboard of said open end of said body, wherein said anchor cable outriggers each comprise;

an upper wishbone link having an attachment point at an outboard end thereof and horizontal holes through the inboard ends of said wishbone link;

a pair of lower links having outboard ends attached to the outboard end of said upper wishbone link and holes through inboard ends of each lower link;

a plurality of pinned connectors fastened to said frame for accommodating inboard ends of each link of said anchor cable outrigger, each pinned connector having a removable pin passing through said connector and through respective holes of said links for attaching said anchor cable outrigger to said frame in a removable manner.

3. An anchor cable outrigger attached to the frame of a dump truck for providing an attachment point for attaching an anchor cable for use in operating a tailgate, said anchor cable outrigger comprising:

an upper wishbone link having an attachment point at an outboard end thereof and horizontal holes through the inboard ends of said wishbone link;

a pair of lower links having outboard ends attached to the outboard end of said upper wishbone link and holes through inboard ends of each lower link;

a plurality of pinned connectors fastened to said frame for accommodating inboard ends of each link of said anchor cable outrigger, each pinned connector having a removable pin passing through said connector and through respective holes of said links for attaching said anchor cable outrigger to said frame in a removable manner.

4. In an off highway dump truck having a frame supported on a front and a rear axle, a dump body pivotally supported on said frame and a multiple cable operated tailgate projecting into said dump body, one of each of said cables attached to a pair of anchor cable outriggers attached to said frame, one of said pair of anchor cable outriggers located on the left side of said dump truck and the second of said pair of anchor cable outriggers located on the right side of said dump truck, wherein said anchor cable outriggers each comprise:

an upper wishbone link having an attachment point at an outboard end thereof and horizontal holes through the inboard ends of said wishbone link;

a pair of lower links having outboard ends attached to the outboard end of said upper wishbone link and holes through inboard ends of each lower link;

a plurality of pinned connectors fastened to said frame for accommodating inboard ends of each link of said anchor cable outrigger, each pinned connector having a removable pin passing through said connector and through respective holes of said links for attaching said anchor cable outrigger to said frame in a removable manner.