US3657977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for placing continuous reinforcing in concrete paving
Assignee: Rex Chainbelt Inc
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Filing: 1970-02-03
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Granted: 1972-04-25
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Expires: 1990-02-03
Abstract
Abstract Spacing and depressing continuous reinforcing rods in concrete paving allows this reinforcing to be continuously positioned. Continuous reinforcing rods are positioned on the grade to be paved and are lifted over a first machine which receives and spreads the concrete. While supported by the first machine, the rods are separated laterally into two groups which define a center opening through which the concrete is delivered by a conveyor positioned above the rods. Rearwardly of the conveyor, the rods are guided inwardly to close the center opening and are maintained in a predetermined parallel relationship. Tie-bars or full-width cross-bars are then placed on top of the concrete in such a manner as to be beneath the continuous reinforcing rods. The rods are then guided and depressed below the surface of the concrete by a second concrete finishing machine and in turn depress the tie-bars or cross-bars to their proper position immediately therebeneath.
Inventors
- 👤 Michael I Hudis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:30
CPC Classifications
E; E01; E01C; E01C23/00; E01C23/04; E01C19/00; E01C19/48; E01C19/4866; E01C19/4873
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
155 words
First and second concrete paving machines for laying a concrete roadway having continuous longitudinal reinforcing rods embedded therein at a predetermined depth and spacing, each machine having propelling means for travel over the grade on which the rods are preassembled and on which the concrete is to be laid; said first machine comprising a forward series of rolls disposed to elevate and guide the rods into two laterally, wellspaced groups defining an opening therebetween as the machine travels, a concrete conveyor disposed over the rods to discharge concrete through said opening and onto said grade, concrete distributing and spreading means disposed below the elevated rods and rearward of said conveyor, and a rearward series of rolls disposed to uniformly space and lower the rods toward the spread concrete; said second machine comprising forward means to guide and depress the rods into the concrete and intermediate and rearward means to respread and finish the surface thereof.
Claim 2
Dependent Claim
155 words
First and second concrete paving machines for laying a concrete roadway having continuous longitudinal reinforcing rods embedded therein at a predetermined depth and spacing, each machine having propelling means for travel over the grade on which the rods are preassembled and on which the concrete is to be laid; said first machine comprising a forward series of rolls disposed to elevate and guide the rods into two laterally, wellspaced groups defining an opening therebetween as the machine travels, a concrete conveyor disposed over the rods to discharge concrete through said opening and onto said grade, concrete distributing and spreading means disposed below the elevated rods and rearward of said conveyor, and a rearward series of rolls disposed to uniformly space and lower the rods toward the spread concrete; said second machine comprising forward means to guide and depress the rods into the concrete and intermediate and rearward means to respread and finish the surface thereof.
Claim 3
Dependent Claim
44 words
The concrete paving machines as in claim 1 wherein said concrete conveyor projects outwardly from the side of said first machine to receive delivered concrete and extends inwardly over one of said two groups of elevated rods to discharge the concrete through said opening.
Claim 4
Dependent Claim
171 words
Apparatus for laying a reinforced concrete roadway section having a series of continuous longitudinal reinforcing rods embedded therein at a predetermined depth and substantially uniformly spaced across the section, said apparatus having propelling means for travel over the grade on which the rods are preassembled and on which the concrete is to be laid, said apparatus including: forward guide means disposed to elevate and guide the rods in a group which is spaced laterally from a reference plane extending longitudinally of the roadway so that a space is formed between said plane and said group of rods, a concrete conveyor disposed to discharge concrete through said space and onto said grade, concrete distributing and spreading means disposed below the elevated rods and rearward of said conveyor, guide means disposed to lower the rods and uniformly space the same across said roadway section in parallel relation to said reference plane, means to depress the rods to said depth in the concrete, and means to respread and finish the surface of the concrete.
Claim 5
Dependent Claim
171 words
Apparatus for laying a reinforced concrete roadway section having a series of continuous longitudinal reinforcing rods embedded therein at a predetermined depth and substantially uniformly spaced across the section, said apparatus having propelling means for travel over the grade on which the rods are preassembled and on which the concrete is to be laid, said apparatus including: forward guide means disposed to elevate and guide the rods in a group which is spaced laterally from a reference plane extending longitudinally of the roadway so that a space is formed between said plane and said group of rods, a concrete conveyor disposed to discharge concrete through said space and onto said grade, concrete distributing and spreading means disposed below the elevated rods and rearward of said conveyor, guide means disposed to lower the rods and uniformly space the same across said roadway section in parallel relation to said reference plane, means to depress the rods to said depth in the concrete, and means to respread and finish the surface of the concrete.
Claim 6
Dependent Claim
54 words
Apparatus as in claim 3 for laying two adjoining roadway sections having a common reference plane and wherein the forward guide means is disposed to elevate and guide the rods in two groups which are oppositely spaced from said common reference plane and are well spaced from each other to define an opening therebetween.
Claim 7
Dependent Claim
35 words
Apparatus as in claim 3 wherein said concrete conveyor may be projected laterally of the roadway section being laid to receive concrete as from a delivery vehicle operating alongside the grade and the roadway section.
Claim 8
Dependent Claim
31 words
Apparatus as in claim 5 wherein at least some of said guide means comprise support rolls moving under the rods and laterally spaced vertically disposed spacing rolls moving between the rods.
Claim 9
Dependent Claim
33 words
Apparatus as in claim 3 wherein some of the guide means disposed to lower the rods are carried by a wheeled structure which is propelled by the apparatus having propelling means. position immediately
Claim 10
Dependent Claim
65 words
Apparatus as in claim 3 further including a platform disposed forwardly of the means to guide and depress the rods and rearwardly of the concrete distributing and spreading means and from which transverse reinforcing bars may be positioned on the concrete below the elevated rods so that said bars will be depressed by the rods to a positioned in the concrete immediately beneath the rods.
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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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |