US4295311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansion joint element
Assignee: IJS Inc
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Filing: 1979-11-28
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Granted: 1981-10-20
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Expires: 1999-11-28
Abstract
Abstract A prefabricated expansion joint element for forming a surface joint between two concrete construction parts (1,2). The joint element has a central, resilient member (4) and anchoring members (5,6) connected to each side thereof. According to the invention the anchoring members are formed by profile elements (5,6) of epoxy plastic with at least one reinforcing layer (7) cast thereinto, said layer also extending through the intermediate resilient member. The external surface of the central resilient member (4) is connected to and aligned with the external surface of the profile elements (5,6). The profile elements (5,6) are securably by adhesion directly onto the edge portions of the concrete construction parts (1,2), so as to provide easy mounting, long life and resistance to severe climatic conditions and heavy loads.
Inventors
- 👤 Anders Dahlberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:38
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/66; E04B1/68; E04B1/6803; E04B1/6804
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
137 words
A pre-fabricated expansion joint element for forming an elongated surface joint between two concrete construction parts, comprising an intermediate resilient member, substantially consisting of an elastic material, and side elements adjoining at each side thereto, and respectively adapted to be secured to one of the concrete construction parts, said side elements being constituted by profile elements of an epoxy plastic having reinforcing means, said profile elements being securable by adhesion directly onto the edge portions of the concrete construction parts, the intermediate resilient member having a thickened central portiion, at least one of said reinforcing means being integrally cast into both of the profile elements as well as into the intermediate resilient member, and the external surface of the intermediate resilient member being connected to and substantially in alignment with the external surfaces of the profile elements.
Claim 2
Dependent Claim
137 words
A pre-fabricated expansion joint element for forming an elongated surface joint between two concrete construction parts, comprising an intermediate resilient member, substantially consisting of an elastic material, and side elements adjoining at each side thereto, and respectively adapted to be secured to one of the concrete construction parts, said side elements being constituted by profile elements of an epoxy plastic having reinforcing means, said profile elements being securable by adhesion directly onto the edge portions of the concrete construction parts, the intermediate resilient member having a thickened central portiion, at least one of said reinforcing means being integrally cast into both of the profile elements as well as into the intermediate resilient member, and the external surface of the intermediate resilient member being connected to and substantially in alignment with the external surfaces of the profile elements.
Claim 3
Dependent Claim
19 words
A pre-fabricated expansion joint element as claimed in claim 1, wherein each of the profile elements is substantially L-shaped.
Claim 4
Dependent Claim
31 words
A pre-fabricated expansion joint element as claimed in claim 1, wherein the resilient member has an approximately symmetrical triangular cross section with the base of the triangle located at the top.
Claim 5
Dependent Claim
25 words
A pre-fabricated expansion joint element as claimed in anyone of claims 1-3, wherein the resilient member consists of a mixture of epoxy and urethan materials.
Claim 6
Dependent Claim
35 words
A pre-fabricated expansion joint element as claimed in claim 4, wherein said resilient member has a cast central core of a softer material than the remainder of the resilient member, substantially consisting of pure urethan.
Claim 7
Dependent Claim
45 words
A pre-fabricated expansion joint element as claimed in claim 5, wherein a rigid strip of epoxy plastic is cast onto the central portion of the top side of the resilient member, substantially in alignment with the upper legs of the profile elements of epoxy plastic.
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) | 1984-10-19 | 1985-04-20 | 1985-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-19 | 1989-04-20 | 1989-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-19 | 1993-04-20 | 1993-10-20 | $7700.00 | Window Closed / Lapsed |