US3642245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Breakaway bracket
Assignee: United Filtration Corp
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Filing: 1970-03-19
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Granted: 1972-02-15
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Expires: 1990-03-19
Abstract
Abstract This is a hinge or joint for releasably holding a rear vision mirror for use on the cab of a truck or the like in position but constructed to yield or ''''give'''' in response to a predetermined breakaway force so that the mirror will fold in to avoid breakage or bending of the supporting parts.
Inventors
- 👤 Joseph F Wohnlich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:45
CPC Classifications
B; B60; B60R; B60R1/00; B60R1/02; B60R1/06; B60R1/0605; B60R1/0617
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
167 words
In a hinge for releasably and rotatably connecting and supporting a rear vision mirror to a supporting bracket on the side of a truck cab or the like, a main bolt adapted to be disposed generally upright and extending through the supporting bracket at one end and through the mounting of the rear vision mirror at the other, a cam on the bolt intermediate the ends thereof, a spring plate on the bolt opposing the cam, a releasable detent joint between the cam and spring plate constructed to hold the mirror on its mounting in a fixed position, but to release it for pivoting movement about the bolt in response to a predetermined breakaway pressure, and a fixed permanent connection between the spring plate and one of the supports constructed to prevent relative rotation therebetween at all times, the cam including at least two equidistantly spaced peripheral notches adapted to engage and interfittingly receive axially extending, peripherally spaced, flexible ears on the periphery of the spring plate.
Claim 2
Dependent Claim
167 words
In a hinge for releasably and rotatably connecting and supporting a rear vision mirror to a supporting bracket on the side of a truck cab or the like, a main bolt adapted to be disposed generally upright and extending through the supporting bracket at one end and through the mounting of the rear vision mirror at the other, a cam on the bolt intermediate the ends thereof, a spring plate on the bolt opposing the cam, a releasable detent joint between the cam and spring plate constructed to hold the mirror on its mounting in a fixed position, but to release it for pivoting movement about the bolt in response to a predetermined breakaway pressure, and a fixed permanent connection between the spring plate and one of the supports constructed to prevent relative rotation therebetween at all times, the cam including at least two equidistantly spaced peripheral notches adapted to engage and interfittingly receive axially extending, peripherally spaced, flexible ears on the periphery of the spring plate.
Claim 3
Dependent Claim
52 words
The structure of claim 1 further characterized in that the portion of the spring plate adjacent the flexible ears is unsupported and is in the form of an overhang so that the plate itself may freely flex allowing the ears to cam in and out of the peripheral notches on the cam.
Claim 4
Dependent Claim
56 words
The structure of claim 1 further characterized by and including equidistantly spaced reliefs on the periphery of the cam dimensioned to clear the ears on the spring plate when aligned with them to provide limited free rotation of the mirror and its support when the ears on the spring plate are radially aligned with the reliefs.
Claim 5
Dependent Claim
40 words
The structure of claim 1 further characterized in that the fixed permanent connection between the spring plate and one of the supports includes two rivets, 180* apart, passing through the spring plate and support and headed on both sides thereof.
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) | 1975-02-14 | 1975-08-16 | 1976-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-14 | 1979-08-16 | 1980-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-14 | 1983-08-16 | 1984-02-15 | $7700.00 | Window Closed / Lapsed |