US 6,643,979 B2 · Tensioning device for drum and cable window regulator assembly

Abstract

A window regulator assembly is provided that includes a guide defining a path. A window bar assembly having a window mounted thereon is supported on the guide and is movable along the path. A manual or automatic actuator is interconnected with a drum for rotationally driving the drum. A pair of cables each include an end connected to the drum with the opposing end connected to the guide. The cables are arranged in a pull-pull relationship between the drum and guide. A portion of the cables is wrapped about the circumference of the drum. A drum biasing assembly, which may include a mandrel urged into bore of the drum by a spring, expands the circumference of the drum to take up the slack in the cables. The drum includes radial grooves that divides the drum into sectors that are movable relative to one another by the mandrel.

Claims15

Dependent claims

A window regulator assembly comprising:

a guide defining a path;
a window bar assembly supported on said guide and movable along said path;
an actuator interconnected with a drum for rotationally driving said drum;
a pair of cables with each of said cables having one end connected to said drum and another end connected to said guide, and a portion of said cables wrapped about a circumference of said drum;
and
a drum biasing assembly coacting with said drum and expanding said circumference for taking up slack in said cables, wherein said drum biasing assembly includes a reaction surface on said drum and a resilient member generating a force on said reaction surface expanding said circumference, and wherein said drum biasing assembly includes a mandrel interposed between said resilient member and said reaction surface with said resilient member forcing said mandrel into said reaction surface to expand said circumference.

3 more elements

Dependencies are inferred from the claim text.

Tensioning device for drum and cable window regulator assembly

Life of this patent

Tensioning device for drum and cable window regulator assembly

Life of this patent

Abstract

Claims15