Electro ceramic coated aluminum transmission components

Patent metadata

Field	Value
Publication number	US-9915007-B2
Application number	US-201514753967-A
Country	US
Kind code	B2
Filing date	Jun 29, 2015
Priority date	Jun 29, 2015
Publication date	Mar 13, 2018
Grant date	Mar 13, 2018

Abstract

The present invention is directed to apply plates, clutch plates, reaction plates and backing plates utilized of friction clutch packs, brake housings, clutch hubs, clutch housings, accumulators, spline sets, valve bodies and wear surfaces against which bushings, seals, springs and similar components slide and contact which are utilized in motor vehicle automatic transmissions, are fabricated of aluminum and include an electro ceramic coating deposited thereon. Such components exhibit reduced weight relative to similar components fabricated of steel as well as extended service life due to both the hardness and porosity of the ceramic coating.

First claim

What is claimed is:

1. A component for a friction clutch pack assembly comprising, in combination,
a circular plate having a center opening, said circular plate having a first side surface and a second side surface and said circular plate having an inner edge and an outer edge,
one of said inner and outer edges having a plurality of radially extending splines, and
said circular plate fabricated of aluminum and having an electro ceramic coating directly on said first side surface and said second side surface.

2. The component for the friction clutch pack assembly of claim 1 wherein said circular plate is one of an apply plate and a reaction plate and said plurality of splines are continuous and disposed on said outer edge.

3. The component for the friction clutch pack assembly of claim 1 wherein said circular plate is one of an apply plate and a reaction plate and said plurality of splines are continuous and disposed on said inner edge.

4. The component for the friction clutch pack assembly of claim 1 wherein said circular plate is one of an apply plate and backing plate fabricated of powdered aluminum and said plurality of splines are continuous and disposed on said outer edge.

5. The component for the friction clutch pack assembly of claim 1 wherein said electro ceramic coating has a thickness of from approximately 0.005 mm. to approximately 0.050 mm.

6. The component for the friction clutch pack assembly of claim 1 wherein said circular plate is a friction plate having friction material on at least one of said side surfaces.

7. The component for the friction clutch pack assembly of claim 1 wherein said circular plate is a reaction plate having friction material on one of said side surfaces.

8. A component for a friction clutch pack assembly for a motor vehicle automatic transmission comprising, in combination,
a circular plate having a center opening, said circular plate having a first face and a second face, and said circular plate having an inner edge and an outer edge,
one of said inner and outer edges of said circular plate having a continuous plurality of radially extending splines, and
said circular plate fabricated of aluminum and having an electro ceramic coating applied directly on said first face and said second face.

9. The component for the friction clutch pack assembly for the motor vehicle automatic transmission of claim 8 wherein said circular plate is one of an apply plate and a reaction plate and said plurality of splines are disposed on said outer edge.

10. The component for the friction clutch pack assembly for the motor vehicle automatic transmission of claim 8 wherein said circular plate is one of an apply plate and a reaction plate and said plurality of splines are disposed on said inner edge.

11. The component for the friction clutch pack assembly for the motor vehicle automatic transmission of claim 8 wherein said circular plate is one of an apply plate and backing plate fabricated of powdered aluminum and said plurality of splines are disposed on said outer edge.

12. The component for the friction clutch pack assembly for the motor vehicle automatic transmission of claim 8 wherein said electro ceramic coating has a thickness of from approximately 0.005 mm. to approximately 0.050 mm.

13. The component for the friction clutch pack assembly for the motor vehicle automatic transmission of claim 8 wherein said circular plate is a friction plate having friction material on at least one of said faces.

14. The component for the friction clutch pack assembly for the motor vehicle automatic transmission of claim 8 wherein said circular plate is a reaction plate having friction material on one of said faces.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Heitzenrater Scott W
• White Daniel R
• Marin Carlos E

Classifications

• F16H57/02

  Gearboxes; Mounting gearing therein · CPC title

• F16D25/0638

  with more than two discs, e.g. multiple lamellae · CPC title

• F16H2057/02017

  characterised by special features related to the manufacturing of the gear case, e.g. special adaptations for casting · CPC title

• F16H57/032

  characterised by the materials used · CPC title

• F16D49/02

  shaped as a helical band or coil with more than one turn, with or without intensification of the braking force by the tension of the band or contracting member (similar clutches F16D13/08) · CPC title