Abstract: A vehicle endgate hinge assembly is disclosed. The hinge assembly has a bodyside hinge strap including a hinge support boss extending through the endgate opening shut-face and having a central hole that is coaxial with the endgate pivot axis, a mounting plate located outboard of the shut-face, and a threaded portion extending from the mounting plate through the shut-face. The hinge assembly may have a crank including a hinge key pivotally coupled to a member mounted on the endgate, a pivot shaft extending from the hinge key through the central hole, a lever arm extending from the pivot shaft normal to the endgate pivot axis, and a ball extending from the lever arm spaced from the endgate pivot axis. A nut is located inboard of the endgate opening shut-face and threadably received on the threaded portion, and an energy storage mechanism is coupled to the ball.

Abstract: A viscous rotary damping device for a vehicle end gate assembly is provided. The damping device includes a housing member configured to operatively attach to the vehicle body or the end gate assembly. The housing member defines a fluid chamber having viscous fluid therein. The damping device also includes an impeller member having a mast with a first end configured to operatively attach to the other of the vehicle body and the end gate assembly, and a second end having one or more blades projecting outward therefrom. The second end of the mast is rotatably received in the fluid chamber such that the impeller member dissipates kinetic energy generated by the end gate assembly when transitioning between a first, closed position and a second, open position. A cover plate member is preferably coupled to the housing member, and configured to fluidly seal the fluid chamber.

Abstract: A viscous rotary damping device for a vehicle end gate assembly is provided. The damping device includes a housing member configured to operatively attach to the vehicle body or the end gate assembly. The housing member defines a fluid chamber having viscous fluid therein. The damping device also includes an impeller member having a mast with a first end configured to operatively attach to the other of the vehicle body and the end gate assembly, and a second end having one or more blades projecting outward therefrom. The second end of the mast is rotatably received in the fluid chamber such that the impeller member dissipates kinetic energy generated by the end gate assembly when transitioning between a first, closed position and a second, open position. A cover plate member is preferably coupled to the housing member, and configured to fluidly seal the fluid chamber.

Abstract: A vehicle endgate hinge assembly is disclosed. The hinge assembly has a bodyside hinge strap including a hinge support boss extending through the endgate opening shut-face and having a central hole that is coaxial with the endgate pivot axis, a mounting plate located outboard of the shut-face, and a threaded portion extending from the mounting plate through the shut-face. The hinge assembly may have a crank including a hinge key pivotally coupled to a member mounted on the endgate, a pivot shaft extending from the hinge key through the central hole, a lever arm extending from the pivot shaft normal to the endgate pivot axis, and a ball extending from the lever arm spaced from the endgate pivot axis. A nut is located inboard of the endgate opening shut-face and threadably received on the threaded portion, and an energy storage mechanism is coupled to the ball.