US3592295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wear signalling device for vehicle brake lining
Assignee: Individual
•
Filing: 1969-07-08
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Granted: 1971-07-13
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Expires: 1989-07-08
Abstract
Abstract A device for indicating wear of a brake lining on a brakeshoe which contacts a brakedrum including an elongated wire spring of C-shape with means at one end for attachment to the brakeshoe and as an angular extension at its outer end whose terminal contacts the brakedrum attached to a rotating vehicle wheel, to produce an audible signal. The device has means for retaining the ends close to each other under a bending stress to space the second end from said drum, and means to release the wire when the brake lining has worn to a predetermined minimum thickness.
Inventors
- 👤 Richard Kennel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:20
CPC Classifications
F; F16; F16D; F16D66/00; F16D66/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
125 words
A device for indicating wear of a brake lining on a riveted brakeshoe comprising; an elongated wire spring having a C-shaped portion and an elongated portion, a trigger-release pin demountably retaining said spring between its C-shaped portion and its elongated portion; a threaded stud having an aperture for receiving said trigger release pin, said stud bolted through said brakeshoe and retaining the free end of said C-shaped portion of said spring, so that when the end of said release pin mounted in said threaded stud becomes worn, said release pin will be pulled through the aperture of said threaded stud by the force of said C-shaped portion, thereby permitting the elongated portion of said wire spring to contact the brakedrum and produce an audible signal.
Claim 2
Independent Claim
125 words
A device for indicating wear of a brake lining on a riveted brakeshoe comprising; an elongated wire spring having a C-shaped portion and an elongated portion, a trigger-release pin demountably retaining said spring between its C-shaped portion and its elongated portion; a threaded stud having an aperture for receiving said trigger release pin, said stud bolted through said brakeshoe and retaining the free end of said C-shaped portion of said spring, so that when the end of said release pin mounted in said threaded stud becomes worn, said release pin will be pulled through the aperture of said threaded stud by the force of said C-shaped portion, thereby permitting the elongated portion of said wire spring to contact the brakedrum and produce an audible signal.
Claim 3
Dependent Claim
59 words
A device for indicating wear of a brake lining on a riveted brakeshoe as described in claim 1 wherein the diameter of the rivet bolt in the brakeshoe which is removed prior To application of the apparatus is equal to the diameter of the threaded stud of the apparatus which is placed in the cylindrical opening of the brakeshoe.
References Cited (Backward Citations)
US3381653A
Cited
US3385256A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |