US3822668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roadside warning device
Assignee: Individual
•
Filing: 1973-05-23
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Granted: 1974-07-09
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Expires: 1993-05-23
Abstract
Abstract A foldable roadside warning device is composed of three reflective frame members, two of the frame members being of substantially equal length and being pivotally connected at their ends to the opposite ends of the third frame member. The first and second frame members are limited in their swing away from each other about their pivots so that they have to be forcibly spread apart in order for their free ends to meet one another. Interfitting surfaces on the free ends of the two frame members mate when the free ends meet so as to form a stable triangular frame which can then be supported upright in the roadway by a stand.
Inventors
- 👤 R Schradieck
- 👤 T Lehti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:21
CPC Classifications
B; B60; B60Q; B60Q7/00; B60Q7/005; Y; Y10; Y10S; Y10S40/00; Y10S40/903
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
192 words
A foldable roadside warning device of the triangular frame type comprising first, second and third elongated frame members, each said member having two opposite ends, pivot means connecting one said end of each of said first and second members to said opposite ends of said third member so that said first and second members can be swung from a closed position wherein their said other ends lie adjacent said opposite ends of said third member to an open position wherein their said other ends are spaced from said third member and touch each other to form a corner of said triangular frame, means on said one ends of said first and second members and said opposite ends of said third member which engage each other when said first and second members are swung partially to their open position to stop their further swinging movement so that said members must be flexed in order to reach said open position whereby their tendency to resume their unstressed condition biases said other ends together forming a rigid triangular frame, and means connected to one of said members for supporting the frame in an upright position.
Claim 2
Dependent Claim
192 words
A foldable roadside warning device of the triangular frame type comprising first, second and third elongated frame members, each said member having two opposite ends, pivot means connecting one said end of each of said first and second members to said opposite ends of said third member so that said first and second members can be swung from a closed position wherein their said other ends lie adjacent said opposite ends of said third member to an open position wherein their said other ends are spaced from said third member and touch each other to form a corner of said triangular frame, means on said one ends of said first and second members and said opposite ends of said third member which engage each other when said first and second members are swung partially to their open position to stop their further swinging movement so that said members must be flexed in order to reach said open position whereby their tendency to resume their unstressed condition biases said other ends together forming a rigid triangular frame, and means connected to one of said members for supporting the frame in an upright position.
Claim 3
Dependent Claim
60 words
The device defined in claim 1 wherein the supporting means comprise an elongated member pivotally connected to said third member so that it can be swung from a first position wherein it lies generally in the same plane as the frame and a second position wherein it is oriented at an angle with respect to the plane of the frame.
Claim 4
Dependent Claim
32 words
The warning device defined in claim 1 wherein said opposite ends of said three straps are beveled and butt against one another, forming mitre joints at the three corners of said frame.
Claim 5
Dependent Claim
38 words
The warning device defined in claim 3 and further including means for providing a toothed engagement between the butting beveled member ends adjacent the pivot means so as to minimize relative lateral movement between the pivotally connected members.
Claim 6
Dependent Claim
41 words
The warning device defined in claim 1 and further including ribs integral with said first and second members near their other said ends, said ribs engaging one another when said other said ends are aligned so as to guide them together.
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) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |