Patent US3783979A successfully refreshed from Google Patents.
US3783979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake pads and wear indicators therefor
Assignee: Girling Ltd
•
Filing: 1972-05-15
•
Granted: 1974-01-08
•
Expires: 1992-05-15
Abstract
Abstract A disc-brake pad has a wear indicator characterised in that the indicator is separate from the frictional material and is slid into position on the backing plate from one edge thereof. The advantage is that the wear indicator and the leads thereto do not occupy space behind the backing plate .
Inventors
- 👤 W Hess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:15
CPC Classifications
F; F16; F16D; F16D66/00; F16D66/02; F16D66/021; F16D66/022; F16D66/023; F16D66/024
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
103 words
A disc-brake''s brake pad comprising a backing plate having a front face to which a lining of friction material is attached and a rear face, the lining not extending to the edge of the plate at least over part of that edge but leaving a margin, the improvement residing in that a hole is provided in the margin and in that the hole is connected to the edge by a slot of narrower width than the hole whereby a waisted body of elastomeric material incorporating a wear indicator can be squeezed along the slot and then open out to lock into the hole.
Claim 2
Dependent Claim
103 words
A disc-brake''s brake pad comprising a backing plate having a front face to which a lining of friction material is attached and a rear face, the lining not extending to the edge of the plate at least over part of that edge but leaving a margin, the improvement residing in that a hole is provided in the margin and in that the hole is connected to the edge by a slot of narrower width than the hole whereby a waisted body of elastomeric material incorporating a wear indicator can be squeezed along the slot and then open out to lock into the hole.
Claim 3
Dependent Claim
86 words
A wear indicator for use with the pad of claim 1 comprising an electrical conductor and a body of elastomeric insulating material in which the conductor is embedded, the improvement residing in that the body is waisted so as to provide shoulders for abutment one on each face of the plate and in that the conductor extends out from the indicator back along the path of intended insertion into the plate whereby when the indicator is fitted to a pad the conductor extends within the slot.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |