Ventilated disk brake

• US 4,379,501 A
• Filed: 02/24/1981
• Issued: 04/12/1983
• Est. Priority Date: 02/27/1980
• Status: Expired due to Term

• Current Assignee: Nissan Motor Co., Ltd.
• Original Assignee: Nissan Motor Co., Ltd.
• Inventors: Takada, Toshiaki, Hagiwara, Yutaka, Yamazaki, Tetu
• Primary Examiner(s): Reger, Duane A.
• Application Number:
  US06/237,620
• Time in Patent Office: 777 Days
• Field of Search: 188/18 A, 188/71.6, 188/73.1, 188/218 XL, 188/264 AA, 192/107 R, 192/113 A
• US Class Current: 188/218.0XL
• CPC Class Codes: F16D 65/0006 Noise or vibration control
• CPC Class Codes: F16D 65/128 characterised by means for cooling

Abstract

A ventilated disk brake includes a pair of brake pads which is substantially the same as the prior art, and a rotor. The rotor has a brake-pad engaging portion in which a pair of brake-pad engaging walls are formed to be pressed between and by the pair of brake pads. A plurality of cooling ribs extend radially between the pair of brake-pad engaging walls. The cooling ribs are formed in such a manner that the weight distribution thereof is ununiform in the peripheral direction thereof along the brake-pad engaging portion. For example, the cooling ribs can be different in thickness, length and/or arrangement interval. such a design can be made on the basis of empirical data.

Claims

1. A ventilated disk brake comprising:

a pair of brake pads;

a rotor having a brake-pad engaging portion with a pair of brake-pad engaging walls arranged to be pressed between and by the pair of brake pads;

a plurality of cooling ribs extending radially between the pair of brake-pad engaging walls, the spacing and thickness pattern of said ribs being randomized so that any identical spacing and thickness pattern is not repeated.

2. A ventilated disk brake of claim 1, wherein the number of the ribs is more than twenty.

3. A ventilated disk brake of claim 2, wherein the ribs are located along the whole of the brake-pad engaging portion.

4. A ventilated disk brake comprising:

a pair of brake pads;

a rotor having a brake-pad engaging portion with a pair of brake-pad engaging walls arranged to be pressed between and by the pair of brake pads; and

a plurality of cooling ribs extending radially between the pair of brake-pad engaging walls, the thickness and pitch pattern of said ribs being randomized so that any identical pattern is not repeated.

5. A ventilated disk brake of claim 4, wherein the number of the cooling ribs is more than twenty.

6. A ventilated disk brake of claim 5, wherein the cooling ribs are located along the whole of the brake-pad engaging portion.

7. A ventilated disk brake comprising:

a pair of brake pads;

a rotor having a brake-pad engaging portion with a pair of brake-pad engaging walls arranged to be pressed between and by a pair of brake pads; and

a plurality of cooling ribs extending radially between the pair of brake-pad engaging walls, the thickness pattern of said ribs being randomized so that any identical pattern is not repeated.

8. A ventilated disk brake of claim 7, wherein the number of the cooling ribs is more than twenty.

9. A ventilated disk brake of claim 8, wherein the cooling ribs are located along the whole of the brake-pad engaging portion in a non uniform manner.

10. A ventilated disk brake comprising:

a pair of brake pads;

a rotor having a brake-pad engaging portion with a pair of brake-pad engaging walls arranged to be pressed between and by the pair of brake pads; and

a plurality of cooling ribs extending radially between the pair of brake-pad engaging walls, the circumferential spacing between and the thicknesses of said ribs being randomized in a manner such that uniformly distributed resonance waves are prevented from occuring.

11. A ventilated disk brake of claim 10, wherein the number of the cooling ribs is more than twenty.

12. A ventilated disk brake of claim 11, wherein the cooling ribs are located along the whole of the brake-pad engaging portion in a non uniform manner.