US4172679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for renewing road surfaces
Assignee: Wirtgen Corp
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Filing: 1978-07-05
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Granted: 1979-10-30
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Expires: 1998-07-05
Abstract
Abstract The invention relates to a method for renewing road surfaces where in the course of one single operational step the road surface is milled away, heated and coated with new material and wherein according to a special embodiment of the invention the milling away or cutting away is performed to an amount not reaching the depth of the damages, at least part of the cut away material is distributed in the remaining recesses and is compressed, and subsequently the road surface is subjected to a heating and a subsequent aeration and is then uniformly coated with new material; and it relates also to a machine for performing the method, wherein, behind said cutting or milling device, a distribution device for distributing the milled off material in the remaining recesses of the road surface, a compression device for compressing the milled off material within the recesses, a heating device and optionally a scraper device provided for the aeration of the road surface, which are followed by a spreader device for applying the new coating to the road surface.
Inventors
- 👤 Reinhard Wirtgen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:45
CPC Classifications
E; E01; E01C; E01C23/00; E01C23/06; E01C23/08; E01C19/00; E01C19/12; E01C19/18; E01C19/182; E01C23/065; E01C23/085; E01C23/088; E01C23/14; E01C7/00; E01C7/08; E01C7/18; E01C7/187
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
204 words
An apparatus for repairing asphaltic road pavements in a combined operation comprising an elongated chassis having at least three wheels, at least one of which is steerable and at least one of which is drivable so that said chassis is supported for movement longitudinally along such a pavement, a series of longitudinally spaced processing units carried by such chassis and including means for heating the upper surface of such a pavement, behind said means for heating, a means for milling the thus heated upper surface to cut away the same to a depth less than that of at least some of the damaged areas of such pavement, behind said means for milling, a means for distributing at least some of such displaced material into the recesses of such damaged areas, means for compressing such distributed material, means at the rear end of said chassis for applying fresh asphaltic material to such heated exposed upper surface, and a tub-like storage bin provided at the front end of said chassis for the storage of the new coating material, wherein said storage bin is provided with supporting wheels and is pivotally mounted for movement about a horizontal axis on said chassis so that it can be tilted.
Claim 2
Independent Claim
204 words
An apparatus for repairing asphaltic road pavements in a combined operation comprising an elongated chassis having at least three wheels, at least one of which is steerable and at least one of which is drivable so that said chassis is supported for movement longitudinally along such a pavement, a series of longitudinally spaced processing units carried by such chassis and including means for heating the upper surface of such a pavement, behind said means for heating, a means for milling the thus heated upper surface to cut away the same to a depth less than that of at least some of the damaged areas of such pavement, behind said means for milling, a means for distributing at least some of such displaced material into the recesses of such damaged areas, means for compressing such distributed material, means at the rear end of said chassis for applying fresh asphaltic material to such heated exposed upper surface, and a tub-like storage bin provided at the front end of said chassis for the storage of the new coating material, wherein said storage bin is provided with supporting wheels and is pivotally mounted for movement about a horizontal axis on said chassis so that it can be tilted.
Claim 3
Dependent Claim
15 words
Apparatus according to claim 1, wherein said storage bin is directly pivoted to said chassis.
Claim 4
Dependent Claim
58 words
Apparatus according to claim 1, wherein said storage bin is secured to one end of a supporting arm the other end of which is pivoted to said chassis, and conveying means for conveying such fresh asphaltic material from said storage bin to the means for applying such fresh material including a conveying component carried by said supporting arm.
Claim 5
Dependent Claim
45 words
Apparatus according to claim 3, wherein on each side of said supporting arm a hydraulic operating cylinder is provided, one end of which is pivoted to said chassis while the other end is pivoted to a point between the swivel axis and said storage bin.
Claim 6
Dependent Claim
15 words
Apparatus according to claim 4, wherein two supporting wheels are provided supporting said storage bin.
Claim 7
Dependent Claim
12 words
Apparatus according to claim 5, wherein said supporting wheels are vertically adjustable.
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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) | 1982-10-29 | 1983-04-30 | 1983-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-29 | 1987-04-30 | 1987-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-29 | 1991-04-30 | 1991-10-30 | $7700.00 | Window Closed / Lapsed |