Patent US5092706A successfully refreshed from Google Patents.
US5092706A
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Tack compounds and microwave method for repairing voids in asphalt pavement
Assignee: Raytheon Co
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Filing: 1990-10-24
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Granted: 1992-03-03
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Expires: 2010-10-24
Abstract
Abstract A method for repairing voids such as potholes in asphalt pavement by mixing a lossy microwave material in the tack used for the tack layer. The asphalt patch used to fill the pothole is relatively non-lossy so that a substantial portion of microwave energy applied to the upper surface penetrates through the asphalt patch and is absorbed in the tack layer. The heating of the tack layer is enhanced to improve the interface bond between the asphalt patch and the surface of the pothole.
Inventors
- 👤 Robert F. Bowen
- 👤 John S. Sklenak
- 👤 Kenneth W. Dudley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:23
CPC Classifications
E; E01; E01C; E01C23/00; E01C23/06; E01C7/00; E01C7/08; E01C7/18; E01C7/187
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
135 words
A method of repairing a void in asphalt pavement comprising the steps of: mixing a lossy microwave material with a tack to form a lossy composite tack; applying said composite tack to the surface of said void to form a layer having a thickness of 1/8 inch or less; filling said void on top of said composite tack layer with an asphalt patch which is non-lossy relative to said composite tack; and applying microwave energy for a predetermined time period to the upper surface of said asphalt patch wherein a substantial portion of said microwave energy penetrates through said asphalt path and is absorbed by said lossy microwave material in said lossy composite tack to heat said composite tack layer to form an interface bond between said asphalt patch and said surface of said void.
Claim 2
Independent Claim
135 words
A method of repairing a void in asphalt pavement comprising the steps of: mixing a lossy microwave material with a tack to form a lossy composite tack; applying said composite tack to the surface of said void to form a layer having a thickness of 1/8 inch or less; filling said void on top of said composite tack layer with an asphalt patch which is non-lossy relative to said composite tack; and applying microwave energy for a predetermined time period to the upper surface of said asphalt patch wherein a substantial portion of said microwave energy penetrates through said asphalt path and is absorbed by said lossy microwave material in said lossy composite tack to heat said composite tack layer to form an interface bond between said asphalt patch and said surface of said void.
Claim 3
Dependent Claim
27 words
The method recited in claim 1 further comprising a step of heating said tack before mixing in said lossy microwave material to form said lossy composite tack.
Claim 4
Dependent Claim
19 words
The method recited in claim 1 further comprising a step of heating said asphalt patch before filling said void.
Claim 5
Dependent Claim
21 words
The method recited in claim 1 further comprising a step of cleaning and drying said void before applying said composite tack.
Claim 6
Dependent Claim
18 words
The method recited in claim 1 further comprising a step of adding fibers to form said composite tack.
Claim 7
Dependent Claim
17 words
The method recited in claim 1 wherein said lossy microwave material is Fe 3 O 4 .
Claim 8
Independent Claim
149 words
A method of repairing a void in asphalt pavement comprising the steps of: mixing a lossy microwave material comprising Fe 3 O 4 with a tack to form a lossy composite tack wherein said Fe 3 O 4 is mixed with said tack at an approximate ratio 1:1 by weight; applying said composite tack to the surface of said void to form a layer having a thickness of 1" or less; filling said void on top of said composite tack layer with an asphalt patch; and applying microwave energy for a predetermined time period to the upper surface of said asphalt patch wherein a substantial portion of said microwave energy penetrates through said asphalt patch and is absorbed by said lossy microwave material in said lossy composite tack to heat said composite tack layer to form an interface bond between said asphalt patch and said surface of said void.
Claim 9
Independent Claim
149 words
A method of repairing a void in asphalt pavement comprising the steps of: mixing a lossy microwave material comprising Fe 3 O 4 with a tack to form a lossy composite tack wherein said Fe 3 O 4 is mixed with said tack at an approximate ratio 1:1 by weight; applying said composite tack to the surface of said void to form a layer having a thickness of 1" or less; filling said void on top of said composite tack layer with an asphalt patch; and applying microwave energy for a predetermined time period to the upper surface of said asphalt patch wherein a substantial portion of said microwave energy penetrates through said asphalt patch and is absorbed by said lossy microwave material in said lossy composite tack to heat said composite tack layer to form an interface bond between said asphalt patch and said surface of said void.
Claim 10
Dependent Claim
18 words
The method recited in claim 1 wherein said composite tack layer has a thickness of 1/16" or less.
Claim 11
Dependent Claim
17 words
The method recited in claim 1 wherein said asphalt patch comprises a mixture of asphalt and aggregate.
Claim 12
Dependent Claim
12 words
The method recited in claim 1 wherein said asphalt patch is non-lossy.
Claim 13
Dependent Claim
25 words
The method recited in claim 10 wherein said asphalt patch absorbs less than 0.5 dB of said microwave energy per inch of said asphalt patch.
Claim 14
Dependent Claim
34 words
The method recited in claim 1 wherein said microwave energy is applied at a power level that heats said composite tack layer to the range from 200° F.-250° F. in said predetermined time period.
Claim 15
Dependent Claim
54 words
A composite for paving comprising, in combination: a mixture of tack and a lossy microwave material dispersed in said tack for enhancing heating of said mixture when said mixture is exposed to microwave radiation, said lossy material comprising Fe 3 O 4 mixed with said tack at an approximate ratio of 1:1 by weight.
Claim 16
Dependent Claim
54 words
A composite for paving comprising, in combination: a mixture of tack and a lossy microwave material dispersed in said tack for enhancing heating of said mixture when said mixture is exposed to microwave radiation, said lossy material comprising Fe 3 O 4 mixed with said tack at an approximate ratio of 1:1 by weight.
References Cited (Backward Citations)
US3870426A
Cited
US4151025A
Cited
US4252459A
Cited
US4252487A
Cited
US4234639A
Cited
US4292120A
Cited
US4339289A
Cited
US4594022A
Cited
US4744693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-03-03 | 1995-09-02 | 1996-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-03 | 1999-09-02 | 2000-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-03 | 2003-09-02 | 2004-03-03 | $7700.00 | Window Closed / Lapsed |