US3724612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refurbishable brake disc
Assignee: Individual
•
Filing: 1971-03-01
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Granted: 1973-04-03
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Expires: 1991-03-01
Abstract
Abstract A brake disc is provided with a recess in the region which normally frictionally contacts an adjacent disc. A removable insert complementary to said recess is placed therein, rotated, and locked against further rotational movement within the recess. Inserts worn due to use may be replaced with new inserts.
Inventors
- 👤 R Spain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:18
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/02; F16D65/12; F16D65/122; F16D65/125; F16D65/126
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
216 words
A friction disc for use in a brake assembly comprising: a splined annular disc having a first recessed portion on a first side of said disc, said first recessed portion being separated from a first planar surface by a first shoulder, said first shoulder having a first plurality of cam surfaces thereon; a first annular insert having a first peripheral surface thereon and located in said first recessed portion of the splined annular disc, said first peripheral surface being substantially concentric to said first cam surfaces, said first annular insert being rotated from a first position to a second position where the first peripheral surface will abuttingly engage the first cam surfaces to prevent further independent rotation of the first annular insert, said first annular insert upon rotation from the first position to the second position creating a first plurality of first vacancies between the first peripheral surface and the cam surfaces, said first annular insert having a first friction surface protruding axially above the first planar surface of said annular disc; and a first plurality of plugs located in said first vacancies to maintain said first annular insert in said second position, said first friction surface of the first annular insert being adapted to simultaneously engage a corresponding mating friction surface during a brake application.
Claim 2
Dependent Claim
216 words
A friction disc for use in a brake assembly comprising: a splined annular disc having a first recessed portion on a first side of said disc, said first recessed portion being separated from a first planar surface by a first shoulder, said first shoulder having a first plurality of cam surfaces thereon; a first annular insert having a first peripheral surface thereon and located in said first recessed portion of the splined annular disc, said first peripheral surface being substantially concentric to said first cam surfaces, said first annular insert being rotated from a first position to a second position where the first peripheral surface will abuttingly engage the first cam surfaces to prevent further independent rotation of the first annular insert, said first annular insert upon rotation from the first position to the second position creating a first plurality of first vacancies between the first peripheral surface and the cam surfaces, said first annular insert having a first friction surface protruding axially above the first planar surface of said annular disc; and a first plurality of plugs located in said first vacancies to maintain said first annular insert in said second position, said first friction surface of the first annular insert being adapted to simultaneously engage a corresponding mating friction surface during a brake application.
Claim 3
Dependent Claim
42 words
The friction disc as recited in claim 1 wherein said first peripheral surface and said first cam surfaces are complementary beveled to prevent said first annular insert from moving axially when held in said second position by said first plurality of plugs.
Claim 4
Dependent Claim
51 words
The friction disc as recited in claim 2 wherein said annular disc further includes: a second recessed portion on a second side of said disc, said second recessed portion being separated from a second planar surface by a second shoulder, said second shoulder having a second plurality of cam surfaces thereon.
Claim 5
Dependent Claim
175 words
The friction disc as recited in claim 3, further including: a second annular insert having a second peripheral surface thereon and located in said second recessed portion of the splined annular disc, said second peripheral surface being substantially concentric to said second cam surfaces, said second annular insert being rotated from a first position to a second position where the second peripheral surface will abuttingly engage the second cam surfaces to prevent furtheR independent rotation of the second annular insert, said second annular insert upon rotation from the first position to the second position creating a second plurality of vacancies between the second peripheral surface and the second cam surfaces, said second annular insert having a second friction surface protruding axially above the second planar surface of said annular disc; and a second plurality of plugs located in said second vacancies to maintain said second annular insert in said second position, said second friction surface of the second annular insert being adapted to simultaneously engage a corresponding second mating friction surface during a brake application.
Claim 6
Dependent Claim
26 words
The friction disc, as recited in claim 4 wherein the annular disc, the first annular insert and the second annular insert are essentially all carbon composites.
Claim 7
Dependent Claim
24 words
The friction disc, as recited in claim 5, wherein the first and second plurality of plugs are composites derived from a pyrolyzed carbonaceous material.
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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |