US4335975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for plastifying and tearing up of damaged roadsurfaces and covers
Assignee: Individual
•
Filing: 1980-05-05
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Granted: 1982-06-22
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Expires: 2000-05-05
Abstract
Abstract In a method for resurfacing a road, the road surface is first plastified and broken-up by first and second separable devices. The broken-up material is immediately distributed on the road surface by the second device, whereby the broken-up material is simultaneously rearranged and profiled or contoured without the introduction of fresh asphalt or bituminous material at this point of time. A road surfacing or repaver apparatus forming a third separate device then applies fresh asphalt or bituminous material onto the broken-up distributed, rearranged and profiled top surface of the road. Preferably, two distributions of the broken-up material are employed prior to the asphalt application and compaction of the broken-up and distributed material and the new asphalt material. A truck supplies fresh asphalt or bituminous material to the repaver.
Inventors
- 👤 Walter Schoelkopf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:16
CPC Classifications
E; E01; E01C; E01C23/00; E01C23/06; E01C23/12; E01C23/121; E01C23/065; E01C23/14; E01C7/00; E01C7/08; E01C7/18; E01C7/187; E01C7/35; E01C7/353
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
264 words
A method for resurfacing an old blacktop road surface by means of first, second, and third separate, mobile units performing a respective first, second, and third group of steps, wherein said first group performed by said first, separate mobile unit comprises the steps of: (a) providing, by means of a single heater, a single heat application to the old road surface for heating and plastifying the old road surface to a given depth (17), (b) breaking up only a top portion (18) of the heated old road surface to produce a broken-up material layer having a thickness substantially less than said given depth (17) of heated old road surface, (c) rearranging and distributing the broken-up material on the remaining still heated but otherwise undisturbed old road surface to produce a first profiled layer (19) of broken-up material, wherein said second separate mobile unit performs the steps of: (d) supplying fresh asphalt material into the third, separate mobile unit, and wherein said third group performed by said third, separate mobile unit comprises the steps of: (e) distributing fresh asphalt material on top of said profiled, broken-up layer (19) over the entire working width of the third unit while said road surface and the layer (19) of broken-up material are still sufficiently plastified from said single heat application, and (f) immediately profiling and compacting said fresh asphalt material as a top layer (25) together with said broken-up material layer (19) whereby the still heated but otherwise undisturbed old road surface enters into an intimate bond with the layers (19) and (25) in a single heat application.
Claim 2
Independent Claim
264 words
A method for resurfacing an old blacktop road surface by means of first, second, and third separate, mobile units performing a respective first, second, and third group of steps, wherein said first group performed by said first, separate mobile unit comprises the steps of: (a) providing, by means of a single heater, a single heat application to the old road surface for heating and plastifying the old road surface to a given depth (17), (b) breaking up only a top portion (18) of the heated old road surface to produce a broken-up material layer having a thickness substantially less than said given depth (17) of heated old road surface, (c) rearranging and distributing the broken-up material on the remaining still heated but otherwise undisturbed old road surface to produce a first profiled layer (19) of broken-up material, wherein said second separate mobile unit performs the steps of: (d) supplying fresh asphalt material into the third, separate mobile unit, and wherein said third group performed by said third, separate mobile unit comprises the steps of: (e) distributing fresh asphalt material on top of said profiled, broken-up layer (19) over the entire working width of the third unit while said road surface and the layer (19) of broken-up material are still sufficiently plastified from said single heat application, and (f) immediately profiling and compacting said fresh asphalt material as a top layer (25) together with said broken-up material layer (19) whereby the still heated but otherwise undisturbed old road surface enters into an intimate bond with the layers (19) and (25) in a single heat application.
Claim 3
Dependent Claim
45 words
The method of claim 1, wherein said step (c) of rearranging and distributing said broken-up material on said still hot but otherwise undisturbed old road surface is performed directly following said step (b), whereby said broken-up material is not picked up from said road surface.
Claim 4
Dependent Claim
78 words
The method of claim 1, wherein said step (b) of breaking up comprises drawing rows of tearing-up teeth along said road surface to a thickness (18) which is substantially less than said given depth (17), whereby the plastified road surface material is broken up and partially rearranged on said road surface by said tearing-up teeth, and further rearranging and distributing said broken-up material so that broken-up portions of material will take up different positions on the road surface.
Claim 5
Dependent Claim
26 words
The method of claim 1, further comprising profiling said broken-up layer (19) on said still hot road surface prior to distributing said fresh asphalt material thereon.
Claim 6
Dependent Claim
52 words
The method of claim 1, wherein said step of rearranging and distributing said broken-up material comprises rotating a pair of worms through said broken-up material following the breaking-up thereof, said worms being staggered laterally with respect to said road surface and each having a length of substantially one half the working width.
Claim 7
Dependent Claim
31 words
The method of claim 1, wherein said step of rearranging and distributing said broken-up material comprises moving a distributor continuously back and forth over the working width of said road surface.
Claim 8
Dependent Claim
25 words
The method of claim 1, further comprising drawing a screeding bar along said broken-up layer prior to the application of said fresh asphalt material thereto.
Claim 9
Dependent Claim
25 words
The method of claim 1, further comprising scratching said broken-up layer with means (26) on said third unit prior to distributing said fresh asphalt material.
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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) | 1985-06-21 | 1985-12-21 | 1986-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-21 | 1989-12-21 | 1990-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-21 | 1993-12-21 | 1994-06-22 | $7700.00 | Window Closed / Lapsed |