Patent US4379501A successfully refreshed from Google Patents.
US4379501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilated disk brake
Assignee: Nissan Motor Co Ltd
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Filing: 1981-02-24
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Granted: 1983-04-12
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Expires: 2001-02-24
Abstract
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.
Inventors
- 👤 Yutaka Hagiwara
- 👤 Toshiaki Takada
- 👤 Tetu Yamazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:37
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/02; F16D65/12; F16D65/128; F16D65/0006
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
71 words
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.
Claim 2
Dependent Claim
71 words
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.
Claim 3
Dependent Claim
17 words
A ventilated disk brake of claim 1, wherein the number of the ribs is more than twenty.
Claim 4
Dependent Claim
20 words
A ventilated disk brake of claim 2, wherein the ribs are located along the whole of the brake-pad engaging portion.
Claim 5
Dependent Claim
69 words
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.
Claim 6
Dependent Claim
69 words
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.
Claim 7
Dependent Claim
18 words
A ventilated disk brake of claim 4, wherein the number of the cooling ribs is more than twenty.
Claim 8
Dependent Claim
21 words
A ventilated disk brake of claim 5, wherein the cooling ribs are located along the whole of the brake-pad engaging portion.
Claim 9
Dependent Claim
67 words
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.
Claim 10
Dependent Claim
67 words
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.
Claim 11
Dependent Claim
18 words
A ventilated disk brake of claim 7, wherein the number of the cooling ribs is more than twenty.
Claim 12
Dependent Claim
26 words
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.
Claim 13
Dependent Claim
76 words
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.
Claim 14
Dependent Claim
76 words
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.
Claim 15
Dependent Claim
18 words
A ventilated disk brake of claim 10, wherein the number of the cooling ribs is more than twenty.
Claim 16
Dependent Claim
26 words
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.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-04-11 | 1986-10-11 | 1987-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-11 | 1990-10-11 | 1991-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-11 | 1994-10-11 | 1995-04-12 | $7700.00 | Window Closed / Lapsed |