Patent EP0469470A1 successfully refreshed from Google Patents.
US3249182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-energizing, internally expanding brake
Assignee: Individual
•
Filing: 1963-06-06
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Granted: 1966-05-03
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Expires: 1983-06-06
Abstract
No abstract record available.
Inventors
- 👤 Hugh T O'reilly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:47
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/14; F16D65/16; F16D65/22; F16D51/00; F16D51/46; F16D51/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
180 words
IN A VEHICLE WHEEL BRAKE THE TYPE HAVING A ROTATING BRAKE DRUM AND A STATIONARY BRAKE SUPPORT, A BRAKE ACTUATING DEVICE COMPRISING A FIRST BRAKE SHOE EXTENDING ALONG A PORTION OF THE CIRCUMFERENCE OF THE BRAKE DRUM AND HAVING ONE END THEREOF MOUNTED FOR PIVOTING MOVEMENT ON THE SUPPORT, A SECOND BRAKE SHOE, MEANS MOUNTING THE SECOND BRAKE SHOE SOLELY ON THE FIRST BRAKE SHOE AT THE END OPPOSITE THE PIVOTAL MOUNTING, MEANS FOR SELECTIVELY URGING THE SECOND BRAKE SHOE RADIALLY AGAINST THE BRAKE DRUM, MEANS ON THE SECOND BRAKE SHOE FOR ENGAGING A PORTION OF THE FIRST BRAKE SHOE, MEANS FOR DISPLACING THE FIRST SHOE AGAINST THE BRAKE DRUM UPON MOVEMENT OF THE SECOND SHOE TOWARD SAID PIVOT MOUNTING, AND MEANS FOR DISPLACING THE FIRST BRAKE SHOE AWAY FROM THE DRUM UPON MOVEMENT OF THE SECOND SHOE AWAY FROM THE PIVOTAL MOUNTING WHEREBY UPON MOVEMENT OF THE SECOND SHOE AGAINST THE ROTATING DRIM BY THE URGING MEANS, THE SECOND SHOE IS DISPLACED TANGENTIALLY AGAINST SAID PORTION OF THE FIRST BRAKE SHOE TO CAM THE FIRST SHOE AGAINST THE DRUM.
Claim 2
Dependent Claim
180 words
IN A VEHICLE WHEEL BRAKE THE TYPE HAVING A ROTATING BRAKE DRUM AND A STATIONARY BRAKE SUPPORT, A BRAKE ACTUATING DEVICE COMPRISING A FIRST BRAKE SHOE EXTENDING ALONG A PORTION OF THE CIRCUMFERENCE OF THE BRAKE DRUM AND HAVING ONE END THEREOF MOUNTED FOR PIVOTING MOVEMENT ON THE SUPPORT, A SECOND BRAKE SHOE, MEANS MOUNTING THE SECOND BRAKE SHOE SOLELY ON THE FIRST BRAKE SHOE AT THE END OPPOSITE THE PIVOTAL MOUNTING, MEANS FOR SELECTIVELY URGING THE SECOND BRAKE SHOE RADIALLY AGAINST THE BRAKE DRUM, MEANS ON THE SECOND BRAKE SHOE FOR ENGAGING A PORTION OF THE FIRST BRAKE SHOE, MEANS FOR DISPLACING THE FIRST SHOE AGAINST THE BRAKE DRUM UPON MOVEMENT OF THE SECOND SHOE TOWARD SAID PIVOT MOUNTING, AND MEANS FOR DISPLACING THE FIRST BRAKE SHOE AWAY FROM THE DRUM UPON MOVEMENT OF THE SECOND SHOE AWAY FROM THE PIVOTAL MOUNTING WHEREBY UPON MOVEMENT OF THE SECOND SHOE AGAINST THE ROTATING DRIM BY THE URGING MEANS, THE SECOND SHOE IS DISPLACED TANGENTIALLY AGAINST SAID PORTION OF THE FIRST BRAKE SHOE TO CAM THE FIRST SHOE AGAINST THE DRUM.
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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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |