US4317642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for abrading and recoating road pavements
Assignee: Wirtgen Corp
•
Filing: 1979-11-19
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Granted: 1982-03-02
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Expires: 1999-11-19
Abstract
Abstract The invention relates to a method and apparatus for abrading and recoating road pavements by peeling or milling the road pavement surface which is to be renewed and coating it again, wherein the milled-off material is collected, heated, if desired, and mixed with aggregates, and is then applied as a new pavement. The apparatus for performing this method comprises a peeling or milling unit provided on a chassis, which is preferably automotive, a collector device for the peeled-off or milled-off material and, if desired, an additional road paver for the application of the new road pavement material, wherein in addition to said collector device a mixer is provided, in which the peeled-off or milled-off material may be mixed with the ingredients which are to be used for the renewed application.
Inventors
- 👤 Reinhard Wirtgen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:29
CPC Classifications
E; E01; E01C; E01C23/00; E01C23/06; E01C23/065; E01C19/00; E01C19/46; E01C19/463
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
102 words
A method for abrading and recoating road pavements, comprising the steps of: determining the composition of the road pavement material which is to be renewed by sampling and analyzing the same; peeling or milling the road pavement material which is to be renewed from the road; collecting the peeled or milled road material and heating the same if desired; mixing the collected material with additional aggregate components of a type and in an amount determined by the composition of the road pavement material to be renewed; and applying the collected material and components mixed therewith to the road as a new pavement.
Claim 2
Independent Claim
102 words
A method for abrading and recoating road pavements, comprising the steps of: determining the composition of the road pavement material which is to be renewed by sampling and analyzing the same; peeling or milling the road pavement material which is to be renewed from the road; collecting the peeled or milled road material and heating the same if desired; mixing the collected material with additional aggregate components of a type and in an amount determined by the composition of the road pavement material to be renewed; and applying the collected material and components mixed therewith to the road as a new pavement.
Claim 3
Dependent Claim
55 words
A method according to claim 1, wherein the peeled-off, collected and, if necessary, newly heated material is fed into a mixer provided on the chassis and is mixed therein with the aggregates which are missing in the desired new road pavement and is then by means of a road paver applied as the new pavement.
Claim 4
Dependent Claim
25 words
A method according to claim 1, wherein prior to the application of the new material the milled road pavement is subjected to a heat treatment.
Claim 5
Dependent Claim
24 words
A method according to claim 3, wherein said milled road pavement is subjected, prior to the application, to a heat treatment by gas jets.
Claim 6
Dependent Claim
119 words
Apparatus for abrading and recoating road pavements, comprising: an automotive chassis; means mounted on said chassis for peeling or milling the road pavement material which is to be renewed from the road; means mounted on the chassis for collecting the peeled or milled road material; at least one storage bin mounted on the chassis for storing aggregate components adapted to be mixed with the collected road material; means mounted on the chassis for mixing the collected peeled or milled road material with the aggregate components; means mounted on the chassis for conveying the aggregate components to said mixing means; and means mounted on the chassis for controllably dosing a suitable amount of the aggregate components onto said conveying means.
Claim 7
Dependent Claim
119 words
Apparatus for abrading and recoating road pavements, comprising: an automotive chassis; means mounted on said chassis for peeling or milling the road pavement material which is to be renewed from the road; means mounted on the chassis for collecting the peeled or milled road material; at least one storage bin mounted on the chassis for storing aggregate components adapted to be mixed with the collected road material; means mounted on the chassis for mixing the collected peeled or milled road material with the aggregate components; means mounted on the chassis for conveying the aggregate components to said mixing means; and means mounted on the chassis for controllably dosing a suitable amount of the aggregate components onto said conveying means.
Claim 8
Dependent Claim
19 words
The combination of claim 5 wherein said dosing means comprises an adjustable discharge opening formed in said storage bin.
Claim 9
Dependent Claim
23 words
The combination of claim 6 wherein said means for conveying the aggregate components to said mixing means comprises a variable speed conveyor belt.
Claim 10
Dependent Claim
25 words
An apparatus according to claim 7, wherein the speed of said conveyor belt is controlled by the advance speed of said milling or peeling apparatus.
Claim 11
Dependent Claim
21 words
The combination of claim 5 wherein said mixing means comprises a mixing drum mounted for rotation about a substantially horizontal axis.
Claim 12
Dependent Claim
20 words
An apparatus according to claim 5 wherein said collecting means comprises two V-shaped sheet-metal guides leading into the mixing means.
Claim 13
Dependent Claim
26 words
An apparatus according to claim 5 wherein said collecting means comprises two contra-rotating worm conveyor screws arranged at right angles relative to the direction of travel.
Claim 14
Dependent Claim
19 words
An apparatus according to claim 11 wherein following said worm conveyor screw at least one worm broom is provided.
Claim 15
Dependent Claim
30 words
An apparatus according to claim 5 wherein said collecting means comprises a worm conveyor screw arranged at right angles relative to the direction of travel including two contra-rotating worm halves.
Claim 16
Dependent Claim
24 words
An apparatus according to claim 5 wherein said collecting means comprises a vacuum cleaner covering the total width of the milled or peeled road.
Claim 17
Dependent Claim
16 words
An apparatus according to claim 5 wherein a heating device for the milled-off material is provided.
Claim 18
Dependent Claim
22 words
An apparatus according to claim 15, wherein said mixing means is provided with a heating device for the material to be mixed.
Claim 19
Dependent Claim
20 words
An apparatus according to claim 5 wherein said mixing means constitutes a forced mixer including two contra-rotating mixer vane rollers.
Claim 20
Dependent Claim
25 words
An apparatus according to claim 17, wherein said mixing means is arranged below said chassis and includes a charging opening open in the travelling direction.
Claim 21
Dependent Claim
18 words
An apparatus according to claim 18, wherein said mixing means includes a bottom open to the road pavement.
Claim 22
Dependent Claim
28 words
An apparatus according to claim 5 wherein a heating device to heat the milled or peeled road pavement prior to the application of the new pavement is provided.
Claim 23
Dependent Claim
13 words
An apparatus according to claim 20, wherein said heating device comprises gas jets.
Claim 24
Dependent Claim
24 words
An apparatus according to claim 5 wherein behind said mixing means on said chassis a road paver device for the milled-off material is provided.
Claim 25
Dependent Claim
19 words
An apparatus according to claim 5 wherein in front of said road paver device a grader worm is provided.
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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) | 1985-03-01 | 1985-08-31 | 1986-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-01 | 1989-08-31 | 1990-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-01 | 1993-08-31 | 1994-03-02 | $7700.00 | Window Closed / Lapsed |