US4173681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake pad with integral organic backplate
Assignee: Abex Pagid Equipement SA
•
Filing: 1978-07-19
•
Granted: 1979-11-06
•
Expires: 1998-07-19
Abstract
Abstract A disc brake pad comprises an organic friction material layer and an organic backplate layer. Both layers are formed of pulverulent materials compacted into "green" preforms at a pressure of 80-150 bars, which are then placed in a mold where heat and pressure are applied to create the integral disc brake pad. Both layers use the same resin and they may even be of identical composition.
Inventors
- 👤 Jean-Pierre Durrieu
- 👤 Guy Pomes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:06
CPC Classifications
F; F16; F16D; F16D69/00; F16D69/02; F16D69/025; F16D69/026; B; B32; B32B; B32B5/00; B32B5/22; B32B5/30; B29; B29B; B29B11/00; B29B11/06; B29C; B29C43/00; B29C43/02; B29C43/14; B29C43/146; B32B5/16; F16D65/00; F16D65/02; F16D65/04; F16D65/092; F16D69/021; F16D69/04; F16D69/0408; B29L; B29L2031/00; B29L2031/748; B29L2031/7482; B32B2307/00; B32B2307/70; B32B2307/744; B32B2475/00; F16D2069/001; F16D2069/0425; F16D2069/045; F16D2069/0466; F16D2069/0475; F16D2069/0483; F16D2069/0491; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/254; Y10T428/259; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/31; Y10T428/31504; Y10T428/31652
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
79 words
A disc brake pad comprising an organic friction material layer and an organic backplate material layer integral therewith, characterized in that the backplate layer is an unbaked preform of compacted pulverulent material, the friction layer is an unbaked preform of compacted pulverulent material, each preform containing the same resin binder, and the brake pad is formed by placing both preforms in a mold and simultaneously applying heat and pressure to join the preforms into an integral disc brake pad.
Claim 2
Dependent Claim
79 words
A disc brake pad comprising an organic friction material layer and an organic backplate material layer integral therewith, characterized in that the backplate layer is an unbaked preform of compacted pulverulent material, the friction layer is an unbaked preform of compacted pulverulent material, each preform containing the same resin binder, and the brake pad is formed by placing both preforms in a mold and simultaneously applying heat and pressure to join the preforms into an integral disc brake pad.
Claim 3
Dependent Claim
28 words
The disc brake pad of claim 1, further characterized by the backplate preform being formed by cold compression of the pulverulent material at a pressure of 80-150 bars.
Claim 4
Dependent Claim
34 words
The disc brake pad of claim 1, further characterized by the backplate preform being composed of a pulverulent mix containing 10-60% fiber, 5-40% resin, 0-30% rubber, 5-10% accelerator and vulcanization agents and 20-50% filler.
Claim 5
Dependent Claim
56 words
The disc brake pad of claim 2, further characterized by the friction material preform being composed of a pulverulent mix containing 20-60% fiber, 0-15% resin, 0-15% rubber, 1-8% accelerator and vulcanization agents, 10-30% barium sulfate, 0-25% metal and metal alloys, 10-30% metallic by-products, 0-10% organic friction modifiers, 0-6% inorganic friction modifiers, 5-20% fillers and 0-10% solvents.
References Cited (Backward Citations)
US2686146A
Cited
FR1347812A
Cited
US3572863A
Cited
US3897582A
Cited
US4044188A
Cited
US3956548A
Cited
US4029829A
Cited
US4042085A
Cited
US4098943A
Cited
US4119591A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-11-05 | 1983-05-07 | 1983-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-05 | 1987-05-07 | 1987-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-05 | 1991-05-07 | 1991-11-06 | $7700.00 | Window Closed / Lapsed |