Patent US4106879A successfully refreshed from Google Patents.
US4106879A
Expired / Lapsed
US
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Knockover roadway marker post
Assignee: GUBELA STRASSENAUSRUSTUNGS GmbH
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Filing: 1977-11-03
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Granted: 1978-08-15
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Expires: 1997-11-03
Abstract
Abstract A knockover roadway marker post has a base fixable to the ground by means of a stake or the like and having a flat upper surface provided with an upwardly tapering prismatic formation with a non-regular polygonal cross-section at its base. An upright post element comprises an outer reflector-carrying tube snugly fitted over an insert forming at the lower end of the outer tube a downwardly open recess which is congruent to and fittable over the formation of the base with the lower end of the post engaging the flat upper surface of the base around the formation thereof. A tension spring is hooked between the apex of the upwardly tapering formation and the upper end of the insert and is constantly under tension so as to pull the upper post part tightly down onto the base, and to return it to this position should it be knocked over.
Inventors
- 👤 Bruno Diedershagen
- 👤 Hans Gubela
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:17
CPC Classifications
E; E01; E01F; E01F9/00; E01F9/60; E01F9/623; E01F9/627; E01F9/629
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
87 words
A knockover roadway marker post comprising: a base fixable to the ground and having an upper surface provided with an upwardly tapering formation; an upright post element having a lower post end formed with a downwardly open recess fittable over said formation with same inside said recess and said lower post end engaging said upper surface; and a spring braced between said post element and said base and biasing same together with said lower post end bearing on said upper surface and said formation inside said recess.
Claim 2
Dependent Claim
87 words
A knockover roadway marker post comprising: a base fixable to the ground and having an upper surface provided with an upwardly tapering formation; an upright post element having a lower post end formed with a downwardly open recess fittable over said formation with same inside said recess and said lower post end engaging said upper surface; and a spring braced between said post element and said base and biasing same together with said lower post end bearing on said upper surface and said formation inside said recess.
Claim 3
Dependent Claim
30 words
The post defined in claim 1, wherein said formation has an uppermost apex, said spring being a tension spring stretched between said apex and said post element above said recess.
Claim 4
Dependent Claim
20 words
The post defined in claim 2, wherein said post element includes an insert at said lower end defining said recess.
Claim 5
Dependent Claim
36 words
The post defined in claim 3, wherein said insert is at least partially hollow and has an upper insert end, said tension spring passing vertically through said insert and being secured at said upper end thereof.
Claim 6
Dependent Claim
12 words
The post defined in claim 4, wherein said formation is generally semispherical.
Claim 7
Dependent Claim
15 words
The post defined in claim 4, wherein said formation is generally prismatic and pointed pyramid-fashion.
Claim 8
Dependent Claim
17 words
The post defined in claim 6, wherein said formation is of trapezoidal outline at said upper surface.
Claim 9
Dependent Claim
17 words
The post defined in claim 6, wherein said formation is of triangular outline at said upper surface.
Claim 10
Dependent Claim
21 words
The post defined in claim 4, wherein said formation is constituted by a plurality of bent rods secured to said base.
Claim 11
Dependent Claim
21 words
The post defined in claim 4, wherein said formation and said base are unitarily formed out of a single metal sheet.
Claim 12
Dependent Claim
28 words
The post defined in claim 10, wherein said formation is formed with at least one hole, said tension spring having a lower spring end hooked into said hole.
Claim 13
Dependent Claim
20 words
The post defined in claim 4; further comprising a chain between said spring and said upper end of said insert.
Claim 14
Dependent Claim
20 words
The post defined in claim 4, wherein said insert is provided at its said lower end with a stiffening member.
Claim 15
Dependent Claim
50 words
The post defined in claim 4, wherein said insert is generally tubular and is formed at its said upper end with a pair of diametrically opposite upwardly open notches, said post further comprising a transverse rod resting in said notches, said spring having an upper end connected to said rod.
Claim 16
Dependent Claim
21 words
The post defined in claim 14, wherein said insert is formed at each of said notches with an inwardly projecting pocket.
Claim 17
Dependent Claim
44 words
The post defined in claim 4, wherein said insert is formed of synthetic-resin material and has a plurality of upright and separate passages including a central passage of a cross-sectional shape corresponding to the outline and size of said formation at said upper surface.
Claim 18
Dependent Claim
38 words
The post defined in claim 4, wherein said base includes a lower plate provided with a stake insertable into the ground and an upper plate releasably secured to said lower plate and forming said surface having said formation.
Claim 19
Dependent Claim
50 words
The post defined in claim 17, wherein said plates are generally congruent and trapezoidal, one of said plates having a long base formed with a pair of juxtaposed transverse notches defining a tongue, whereby said tongue can be bent past the other of said plates to secure said plates together.
Claim 20
Dependent Claim
30 words
The post defined in claim 1, wherein said recess has a predetermined non-circular outline at said upper surface, said recess having a rim of substantially the same size and shape.
Claim 21
Dependent Claim
28 words
The post defined in claim 1, wherein said post element comprises an insert secured to said spring and a tube fitted over and extending upwardly beyond said insert.
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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) | 1981-08-14 | 1982-02-13 | 1982-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-14 | 1986-02-13 | 1986-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-14 | 1990-02-13 | 1990-08-15 | $7700.00 | Window Closed / Lapsed |