Patent US3767018A successfully refreshed from Google Patents.
US3767018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake shoe and method of manufacture thereof
Assignee: RBS INDUSTRIES Inc A CORP OF
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Filing: 1971-01-21
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Granted: 1973-10-23
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Expires: 1991-01-21
Abstract
Abstract A brake shoe consisting of a friction pad and a metal support with the support having a plurality of shouldered rivets clinched thereto with the friction pad being molded to shape against the support and hardened to have portions encircling the shoulders to mechanically secure the pad to the support.
Inventors
- 👤 R Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:11
CPC Classifications
F; F16; F16D; F16D69/00; F16D69/04; F16D69/0408; B; B29; B29C; B29C37/00; B29C37/0078; B29C37/0082; B29C43/00; B29C43/32; B29C43/36; B29C43/361; B29C70/00; B29C70/68; B29C70/78; F16D65/00; F16D65/02; F16D65/04; F16D65/092; B29C2043/3615; B29K; B29K2105/00; B29K2105/25; B29K2105/251; B29L; B29L2031/00; B29L2031/748; B29L2031/7482; F16D2069/0425; F16D2069/0433; F16D2069/0441; F16D2069/0483; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49888; Y10T29/4998; Y10T29/49982; Y10T29/49986
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
213 words
A brake shoe comprising a metal support having a surface and a plurality of through apertures, a plurality of elements with each element having an enlarged head and a shank and with one element being positioned in each aperture, means securing each element to the support in its aperture with the head being spaced from the surface and with the shank forming a seal with the support, and a unitary friction pad overlying the surface and being formed of hardened friction material with a portion encircling the shank of each element beneath its head to effect mechanical securement of the pad to the support, in which each of the elements is a rivet having the end of the shank portion project past the aperture, in which the securing means enlarges the projecting end of the rivet, in which the shank of the rivet is formed with a shoulder portion adjacent the head with the shoulder portion being smaller than the head and larger than the aperture and in which the end of the shoulder is flat to form a ledge which abuts the surface to form a seal therewith, said pad being formed of hardenable material on said support with the seal preventing leakage of the material through its aperture prior to hardening.
Claim 2
Dependent Claim
213 words
A brake shoe comprising a metal support having a surface and a plurality of through apertures, a plurality of elements with each element having an enlarged head and a shank and with one element being positioned in each aperture, means securing each element to the support in its aperture with the head being spaced from the surface and with the shank forming a seal with the support, and a unitary friction pad overlying the surface and being formed of hardened friction material with a portion encircling the shank of each element beneath its head to effect mechanical securement of the pad to the support, in which each of the elements is a rivet having the end of the shank portion project past the aperture, in which the securing means enlarges the projecting end of the rivet, in which the shank of the rivet is formed with a shoulder portion adjacent the head with the shoulder portion being smaller than the head and larger than the aperture and in which the end of the shoulder is flat to form a ledge which abuts the surface to form a seal therewith, said pad being formed of hardenable material on said support with the seal preventing leakage of the material through its aperture prior to hardening.
Claim 3
Dependent Claim
209 words
A brake shoe comprising a metal support having a surface and a plurality of through apertures, a plurality of elements with each element having an enlarged head and a shank and with one element being positioned in each aperture, means securing each element to the support in its aperture with the head being spaced from the surface and with the shank forming a seal with the support, and a unitary friction pad overlying the surface and being formed of hardened friction material with a portion encircling the shank of each element beneath its head to effect mechanical securement of the pad to the support, in which each of the elements is a rivet having the end of the shank portion project past the aperture, in which the securing means enlarges the projecting end of the rivet, in which the shank of the rivet is formed with a shoulder portion adjacent the head with the shoulder portion being smaller than the head and tapering to a size less than the aperture and in which the shoulder portion wedges with the aperture to form a seal therewith, said pad being formed of hardenable material on said support with the seal preventing leakage of the material through its aperture prior to hardening.
Claim 4
Dependent Claim
209 words
A brake shoe comprising a metal support having a surface and a plurality of through apertures, a plurality of elements with each element having an enlarged head and a shank and with one element being positioned in each aperture, means securing each element to the support in its aperture with the head being spaced from the surface and with the shank forming a seal with the support, and a unitary friction pad overlying the surface and being formed of hardened friction material with a portion encircling the shank of each element beneath its head to effect mechanical securement of the pad to the support, in which each of the elements is a rivet having the end of the shank portion project past the aperture, in which the securing means enlarges the projecting end of the rivet, in which the shank of the rivet is formed with a shoulder portion adjacent the head with the shoulder portion being smaller than the head and tapering to a size less than the aperture and in which the shoulder portion wedges with the aperture to form a seal therewith, said pad being formed of hardenable material on said support with the seal preventing leakage of the material through its aperture prior to hardening.
References Cited (Backward Citations)
US2067677A
Cited
US3452638A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |