Friction material for drum-in-hat disc brake assembly

• US 6,220,405 B1
• Filed: 10/29/1999
• Issued: 04/24/2001
• Est. Priority Date: 07/02/1997
• Status: Expired due to Term

• Current Assignee: Alliedsignal Inc.
• Original Assignee: Alliedsignal Inc.
• Inventors: Kesavan, Sunil, Tsang, Peter H. S., Russik, Joseph B., Staklis, Andris A.
• Primary Examiner(s): Butler, Douglas C.
• Application Number:
  US09/430,594
• Time in Patent Office: 543 Days
• Field of Search: 188/251.A, 188/251.R, 188/251.M, 188/70.R, 188/218.R, 188/71.1, 188/73.1, 188/250.B, 188/250.G, 192/107.M, 523/149, 523/152, 523/216, 523/209, 523/451, 524/493, 524/445, 524/451, 106/36, 427/386, 427/387
• US Class Current: 188/251.00A
• CPC Class Codes: F16D 69/025 Compositions based on an organic binder

Abstract

A drum-in-hat disc brake assembly is disclosed having a drum brake shoe with a friction material comprising a phenolic polymer resin having incorporated into the polymer chain one or more inorganic atom-containing groups selected from the group consisting of a boron-containing group, a phosphorous-containing group, a nitrogen-containing group, a silicon-containing group, and a sulfur-containing group.

Claims

1. A drum-in-hat disc brake assembly including a drum brake shoe that comprises a friction material comprising a phenolic polymer resin including one or more inorganic atom-containing groups selected from the group consisting of a boron-containing group, a phosphorous-containing group, a nitrogen-containing group, a silicon-containing group, and a sulfur-containing group incorporated into its polymer chain.

2. A drum-in-hat disc brake assembly according to claim 1 wherein said phenolic polymer resin has incorporated into its polymer chain one or more inorganic atom-containing groups selected from the group consisting of a boron-containing group, a phosphorous-containing group, and a nitrogen-containing group.

3. A drum-in-hat disc brake assembly according to claim 1 wherein said phenolic polymer resin includes a boron-containing group incorporated into its polymer chain.

4. A drum-in-hat disc brake assembly according to claim 1 wherein said phenolic polymer resin includes a phosphorous-containing group incorporated into its polymer chain.

5. A drum-in-hat disc brake assembly according to claim 1 wherein said phenolic polymer resin includes a nitrogen-containing group incorporated into its polymer chain.

6. A drum-in-hat disc brake assembly according to claim 1 wherein said phenolic polymer resin includes phosphorous and nitrogen-containing groups incorporated into its polymer chain.

7. A drum-in-hat disc brake assembly according to claim 1 wherein said phenolic resin includes boron and nitrogen-containing groups incorporated into its polymer chain.

8. A drum-in-hat disc brake assembly according to claim 1 wherein said phenolic polymer resin includes boron, phosphorous, and nitrogen-containing groups incorporated into its polymer chain.

9. A drum-in-hat disc brake assembly according to claim 1 comprising a first phenolic polymer resin including a phosphorous-containing group incorporated into its polymer chain, and a second phenolic resin including a boron-containing group incorporated into its polymer chain.

10. A drum-in-hat disc brake assembly according to claim 1 comprising a first phenolic polymer resin including a phosphorous-containing group incorporated into its polymer chain, and a second phenolic resin including boron-, phosphorous-, and nitrogen-containing groups incorporated into its polymer chain.

11. A drum-in-hat disc brake assembly according to claim 1 wherein said one or more inorganic atom-containing groups are incorporated into said polymer chain in place of methylene linking groups.

12. A drum-in-hat disc brake assembly according to claim 1 wherein said friction material further comprises bauxite.

13. A drum-in-hat disc brake assembly according to claim 12 wherein said friction material further comprises attapulgite clay.

14. A drum-in-hat disc brake assembly according to claim 1 wherein said friction material further comprises attapulgite clay.

15. A drum-in-hat disc brake assembly according to claim 1 that is adapted for use on a motor vehicle having a gross vehicle weight of at least 4000 pounds.

16. A drum-in-hat disc brake assembly according to claim 15 that is adapted for use on a rear wheel of said motor vehicle.

17. A drum-in-hat disc brake assembly according to claim 1 that is adapted for use on a rear wheel of a motor vehicle.