Patent US3981601A successfully refreshed from Google Patents.
US3981601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansion joint and method of installing the same
Assignee: Individual
•
Filing: 1975-03-20
•
Granted: 1976-09-21
•
Expires: 1995-03-20
Abstract
Abstract An expansion joint comprising a joint member having opposing horizontal fixing bodies, such composed of a horizontal cushion course and a vertical cushion source made of elastic material on or under a steel flat horizontal base course, which are connected together by an expansion plate of elastic material that is formed in wave shape and comprises a flexible, flat part and an apex part, and stepped holes composed of a nut hole and an anchor bolt hole concentric with said nut hole made in said horizontal base course at regular intervals, and a method of installing such expansion joints by using an anchor bolt setter.
Inventors
- 👤 Motonosuke Arai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:22
CPC Classifications
E; E01; E01D; E01D19/00; E01D19/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
253 words
A concrete roadway expansion joint for spaced apart roadway portions said roadway portions each including means to anchor a roadway expansion joint to said roadway, said roadway expansion joint comprising opposing horizontal fixing bodies for said spaced apart roadway portions; said fixing bodies including a substantially flat elastic horizontal course; a hard flat metal base course; said horizontal course and said base course fused to each other, both said horizontal course and said base course each approximately the same width over said roadway portions, an elastic expansion plate, said metal base course including a fillet and said elastic horizontal course including a rib over said fillet adjacent said expansion plate being integral with said horizontal fixing bodies for said spaced apart roadway portions; said expansion plate extending below and away from the upper plane of said spaced apart fixing bodies between said apart roadway portions when on said spaced apart roadway portions; said expansion plate including a longitudinal groove along its upper surface, a thick apex corresponding to said longitudinal groove; said apex being opposite said longitudinal groove along said expansion plate between said spaced apart roadway portions; said expansion plate tapering thinner toward said apex, and said fixing bodies including longitudinal stepped openings, each said stepped opening extending at least to said hard metal base course, said roadway's means to anchor a roadway expansion joint interactable to anchor said horizontal fixing body at said stepped openings below the plane of the top of said fixing body and said spaced apart roadway portions.
Claim 2
Dependent Claim
253 words
A concrete roadway expansion joint for spaced apart roadway portions said roadway portions each including means to anchor a roadway expansion joint to said roadway, said roadway expansion joint comprising opposing horizontal fixing bodies for said spaced apart roadway portions; said fixing bodies including a substantially flat elastic horizontal course; a hard flat metal base course; said horizontal course and said base course fused to each other, both said horizontal course and said base course each approximately the same width over said roadway portions, an elastic expansion plate, said metal base course including a fillet and said elastic horizontal course including a rib over said fillet adjacent said expansion plate being integral with said horizontal fixing bodies for said spaced apart roadway portions; said expansion plate extending below and away from the upper plane of said spaced apart fixing bodies between said apart roadway portions when on said spaced apart roadway portions; said expansion plate including a longitudinal groove along its upper surface, a thick apex corresponding to said longitudinal groove; said apex being opposite said longitudinal groove along said expansion plate between said spaced apart roadway portions; said expansion plate tapering thinner toward said apex, and said fixing bodies including longitudinal stepped openings, each said stepped opening extending at least to said hard metal base course, said roadway's means to anchor a roadway expansion joint interactable to anchor said horizontal fixing body at said stepped openings below the plane of the top of said fixing body and said spaced apart roadway portions.
Claim 3
Dependent Claim
23 words
The invention of claim 1 wherein said roadway portions all include a recess and said horizontal fixing bodies are set in said recesses.
Claim 4
Dependent Claim
20 words
The invention of claim 1 wherein said elastic horizontal course is contiguous with said spaced apart roadway portions; upper surface.
Claim 5
Dependent Claim
21 words
The invention of claim 1 wherein said means to anchor said horizontal fixing body includes a threaded portion and a nut.
Claim 6
Dependent Claim
19 words
The invention of claim 1 wherein said means to anchor said horizontal fixing body is a nut and bolt.
References Cited (Backward Citations)
US3218941A
Cited
US3308726A
Cited
US3276335A
Cited
US3387544A
Cited
US3316574A
Cited
US3430544A
Cited
US3570378A
Cited
US3810707A
Cited
US3713368A
Cited
US3850539A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-21 | 1980-03-22 | 1980-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-21 | 1984-03-22 | 1984-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-21 | 1988-03-22 | 1988-09-21 | $7700.00 | Window Closed / Lapsed |