Patent US3829228A successfully refreshed from Google Patents.
US3829228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pavement expansion joint and joint seal
Assignee: Novartis AG
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Filing: 1971-12-27
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Granted: 1974-08-13
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Expires: 1991-12-27
Abstract
Abstract A new pavement expansion joint is provided by applying a mixture of epoxy mortar and an aggregate consisting essentially of short glass fibers and silica sand to steel sheets bonded with an easily strippable adhesive capable of forming a bond of high tensile strength. The steel sheets are positioned at the bottom of a frame forming a pavement expansion joint corner. The epoxy mortar is allowed to cure in the joint corner forming a expansion joint of high impact strength. The readily strippable nature of the adhesive makes the joint corner easily replaceable. The removal of the joint can be facilitated by the insertion of an adhesively attached rubber pad between the epoxy layer and a steel sheet or pair of sheets. This Expansion Joint is also easily repaired or reconstructed with a prefabricated expansion joint. Noise by a vehicle passing over the joint can be reduced by positioning a specially designed elastic joint seal between the expansion joints, the joint seal being characterized by spaced apart projections or protuberances extending above the exposed surfaces of the juxtapositioned expansion joints.
Inventors
- 👤 N Miyazaki
- 👤 M Ishii
- 👤 H Sakurai
- 👤 H Furukawa
- 👤 H Suzuki
- 👤 K Nagatsuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:53
CPC Classifications
E; E01; E01C; E01C11/00; E01C11/02; E01C11/04; E01C11/12; E01C11/126
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
100 words
A pavement expansion joint unit comprising: a. a first metal sheet secured to a pavement slab; b. a sheet means; c. an adhesive layer means substantially coextensive with and between said first metal sheet and said sheet means for adhesively attaching said first metal sheet to said sheet means, said adhesive layer means having a high tensile strength and being easily strippable so that said first metal sheet and said sheet means are readily separable; and d. a cured layer affixed to said sheet means said cured layer comprising a mixture of epoxy mortar, short glass fibers and silica sand.
Claim 2
Dependent Claim
100 words
A pavement expansion joint unit comprising: a. a first metal sheet secured to a pavement slab; b. a sheet means; c. an adhesive layer means substantially coextensive with and between said first metal sheet and said sheet means for adhesively attaching said first metal sheet to said sheet means, said adhesive layer means having a high tensile strength and being easily strippable so that said first metal sheet and said sheet means are readily separable; and d. a cured layer affixed to said sheet means said cured layer comprising a mixture of epoxy mortar, short glass fibers and silica sand.
Claim 3
Dependent Claim
14 words
The expansion joint of claim 1, wherein said sheet means comprises a metal sheet.
Claim 4
Dependent Claim
14 words
The expansion joint of claim 2, wherein said sheet means includes a rubber sheet.
Claim 5
Dependent Claim
155 words
A pavement expansion joint comprising: a. two adjacent expansion joint units each unit comprising a first metal sheet secured to a pavement slab; a sheet means; an adhesive layer means substantially coextensive with and between said first metal sheet and said sheet means for adhesively attaching said first metal sheet to said sheet means, said adhesive layer means having a high tensile strength and being easily strippable so that said first metal sheet and said sheet means are readily separable; a cured layer affixed to said sheet means said cured layer comprising a mixture of epoxy mortar, short glass fibers and silica sand; and b. elastic joint seal means between said two adjacent expansion joint units said seal means having a plurality of spaced projections on the exposed surface thereof whereby the contact area of a tire and said seal means is reduced thereby reducing the noise as a tire passes over said seal means.
Claim 6
Dependent Claim
155 words
A pavement expansion joint comprising: a. two adjacent expansion joint units each unit comprising a first metal sheet secured to a pavement slab; a sheet means; an adhesive layer means substantially coextensive with and between said first metal sheet and said sheet means for adhesively attaching said first metal sheet to said sheet means, said adhesive layer means having a high tensile strength and being easily strippable so that said first metal sheet and said sheet means are readily separable; a cured layer affixed to said sheet means said cured layer comprising a mixture of epoxy mortar, short glass fibers and silica sand; and b. elastic joint seal means between said two adjacent expansion joint units said seal means having a plurality of spaced projections on the exposed surface thereof whereby the contact area of a tire and said seal means is reduced thereby reducing the noise as a tire passes over said seal means.
Claim 7
Dependent Claim
21 words
The pavement expansion joint of claim 4, wherein said projections are ridges running perpendicular to the length of said seal means.
Claim 8
Dependent Claim
21 words
The pavement expansion joint of claim 4, wherein said projections are ridges running parallel to the length of said seal means.
Claim 9
Dependent Claim
25 words
The pavement expansion joint of claim 4, wherein said projections are ridges running on a diagonal with respect to the length of said seal means.
Claim 10
Dependent Claim
19 words
The pavement expansion joint of claim 4, wherein said projections form trapazoids on the surface of said seal means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |