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US 6,601,684 B2Granted
Unitary, circumferentially edge wound friction material clutch plate, and method of making same
AssigneeBorgWarner Inc.
InventorsDean A. Collis, Daniel E. Paterra
Life of this patent
Estimating the term…
Abstract
A friction material has a plurality of connected sections defined by a plurality of notches therebetween. Each notch has an apex which compensates for tear and compression of the friction material when the friction material is circumferentially placed on a flat surface of an annular core plate. In certain embodiments, a multiple linked loading device places the notched friction material adjacent a core plate to form a clutch plate.
Claims33
A friction material for use with a wet-type clutch plate with cooling fluid,
- the friction material comprising a plurality of connected sections and a plurality of notches, each connected section being defined by adjacent notches in the friction material,
- each notch having an apex which compensates for tear and compression of the friction material when the friction material is formed into a circular shape, wherein each notch has an angle generally defined by a formula comprising:
- 360°/number of notches in the friction material.
A friction material for use with a wet-type clutch plate with cooling fluid,
- the friction material comprising a plurality of connected sections and a plurality of notches, each connected section being defined by adjacent notches in the friction material,
- each notch having an apex which compensates for tear and compression of the friction material when the friction material is formed into a circular shape;
- wherein the apex terminates at a distance H from an outer edge of the friction material, the distance H defining a bridge section of the friction material which extends between a distal end of the apex and the outer edge of the friction material;
- wherein a portion C of the bridge section is compressed, while a portion T of the bridge section is stretched or under tension, the compressed portion C extending from an apex point P to the distal end of the apex and the tensioned portion T extending from the apex point P to the outer edge of the friction material;
- and,
- wherein the compressed portion C comprises between about 20 to about 40% of the distance H, while the tensioned portion T comprises about 60 to about 80% of the distance H.
3 more elements
A friction clutch plate for use with a wet-type clutch plate with cooling fluid comprising:
- an annular core plate having opposed annular surfaces;
- a friction material adhered to at least one of the opposed annular surfaces of the core plate;
- the friction material comprising a plurality of connected sections and a plurality of notches therein, each connected section being defined by adjacent notches the friction material, and
- each notch having an apex which compensates for tear and compression of the friction material when the friction material is circumferentially placed on the annular surface of the annular core plate, wherein each notch has an angle generally defined by a formula comprising:
- 360°/number of notches in the friction material.
2 more elements
The friction clutch plate of claim wherein a predetermined amount of an outer edge of the friction material is removed whereby at least one notch defines at least a partially opened groove on the friction plate.
A friction clutch plate for use with a wet-type clutch plate with cooling fluid comprising:
- an annular core plate having opposed annular surfaces,
- a friction material adhered to at least one of the opposed annular surfaces of the core plate;
- the friction material comprising a plurality of connected sections and a plurality of notches therein, each connected section being defined by adjacent notches the friction material, and
- each notch having an apex which compensates for tear and compression of the friction material when the friction material is circumferentially placed on the annular surface of the annular core plate;
- wherein a predetermined amount of an outer edge of the friction material is removed whereby at least one notch defines at least a partially opened groove on the friction plate;
- and,
- wherein the friction material is positioned adjacent the core plate such that an overhand portion of the friction material extends beyond the outer edge of the core plate, and wherein the overhang portion is removed from the friction material.
4 more elements
A friction clutch plate for use with a wet-type clutch plate with cooling fluid comprising:
- an annular core plate having opposed annular surfaces;
- a friction material adhered to at least one of the opposed annular surfaces of the core plate;
- the friction material comprising a plurality of connected sections and a plurality of notches therein, each connected section being defined by adjacent notches the friction material, and
- each notch having an apex which compensates for tear and compression of the friction material when the friction material is circumferentially placed on the annular surface of the annular core plate;
- wherein a predetermined amount of an outer edge of the friction material is removed whereby at least one notch defines at least a partially opened groove on the friction plate;
- and,
- wherein the predetermined amount of the outer edge of the friction material is removed at an angle β° of between about 25 to about 35° from a line perpendicular to a plane defined by the annular surface of the core plate.
4 more elements
A method for making a friction clutch plate having an annular core plate, including the steps of:
- forming a friction material having a plurality of notches, each notch having an angle generally defined by a formula comprising:
- 360°/number of notches in the friction material;
- positioning the core plate adjacent a supply of the friction material, the friction material comprising a plurality of connected sections and a the plurality of notches, each connected section being defined by adjacent notches in the friction material, each notch having an apex which compensates for tear and compression of the friction material when the friction material is placed on an annular surface of the core plate;
- and
- applying a predetermined length of the notched friction material on at least one annular surface of the core plate.
2 more elements
A method for making a friction clutch plate having an annular core plate including the steps of:
- positioning the core plate adjacent a supply of a friction material having an inner edge and an outer edge, the friction material comprising a plurality of connected sections and a plurality of notches, each connected section being defined by adjacent notches in the friction material, each notch having an apex which compensates for tear and compression of the friction material when the friction material is placed on an annular surface of the core plate;
- applying a predetermined length of the friction material on at least one annular surface of the core plate;
- and
- removing a predetermined amount of the outer edge of the friction material at a predetermined angle of between about 25 to about 35° from a line perpendicular to a plane defined by the annular surface of the core plate.
1 more element
A method for making a friction clutch plate having an annular core plate including the steps of:
- positioning the core plate adjacent a supply of a friction material having an inner edge and an outer edge, the friction material comprising a plurality of connected sections and a plurality of notches, each connected section being defined by adjacent notches in the friction material, each notch having an apex which compensates for tear and compression of the friction material when the friction material is placed on an annular surface of the core plate;
- applying a predetermined length of the friction material on at least one annular surface of the core plate;
- and
- removing a predetermined amount of the outer edge of the friction material by chamfer sanding the outer edge.
1 more element
Dependencies are inferred from the claim text.