US3872929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for stablizing the sub-grade of a railroad ballast bed
Assignee: Franz Plasser Bahnbaumaschinen Industrie GmbH
•
Filing: 1974-03-18
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Granted: 1975-03-25
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Expires: 1994-03-18
Abstract
Abstract The sub-grade of a railroad ballast bed is stablized by depositing sand on the bed, removing the sand and ballast in admixture with an excavating bucket conveyor until the sub-grade has been exposed, the sand and ballast are separated from each other on a screen which receives the admixture, and two endless conveyors mounted below the screen convey the separated sand and ballast to the exposed sub-grade to deposit the separated sand thereat at a point ahead of a succeeding point where the separated ballast is deposited, thus depositing the ballast on a layer of sand interposed between the sub-grade and the ballast.
Inventors
- 👤 Josef Teurer
- 👤 Karl Folser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:54
CPC Classifications
E; E01; E01B; E01B27/00; E01B27/12; E01B27/13; E01B27/16; E01B27/18; E01B27/02; E01B27/022; E01B27/06; E01B27/10; E01B2203/00; E01B2203/01; E01B2203/012; E01B2203/02; E01B2203/024; E01B2203/04; E01B2203/045; E01B2203/047; E01B2203/06; E01B2203/065; E01B2203/08; E01B2203/14; E01B2203/141
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
70 words
A method of stabilizing the sub-grade of a railroad ballast bed, comprising the sequential steps of 1. depositing sand on the ballast bed, 2. removing the sand and ballast in admixture until the subgrade has been exposed, 3. separating the sand and the ballast from each other, 4. depositing the separated sand in a layer on the exposed subgrade, and 5. depositing the separated ballast on the layer of sand.
Claim 2
Independent Claim
70 words
A method of stabilizing the sub-grade of a railroad ballast bed, comprising the sequential steps of 1. depositing sand on the ballast bed, 2. removing the sand and ballast in admixture until the subgrade has been exposed, 3. separating the sand and the ballast from each other, 4. depositing the separated sand in a layer on the exposed subgrade, and 5. depositing the separated ballast on the layer of sand.
Claim 3
Dependent Claim
13 words
removing the sand and ballast in admixture until the sub-grade has been exposed,
Claim 4
Dependent Claim
13 words
removing the sand and ballast in admixture until the sub-grade has been exposed,
Claim 5
Dependent Claim
53 words
The method of claim 1, wherein ties fastened to track rails are supported on the ballast bed and some of the separated sand is deposited on the ties during deposition on the sub-grade, comprising the further steps of sweeping the sand off the ties and planing the sand down on the exposed sub-grade.
Claim 6
Dependent Claim
20 words
screening means associated with the removing means, the screening means receiving the mixture and separating the sand from the ballast,
Claim 7
Dependent Claim
20 words
screening means associated with the removing means, the screening means receiving the mixture and separating the sand from the ballast,
Claim 8
Dependent Claim
65 words
at least two endless conveyor bands mounted below the screening means, the conveyor bands each comprising a center dividing web separating the sand and the ballast on adjacent portions of the conveyor band to convey the separated sand and ballast to the exposed sub-grade section and to deposit the separated sand thereat a point ahead of a succeeding point where the separated ballast is deposited,
Claim 9
Dependent Claim
65 words
at least two endless conveyor bands mounted below the screening means, the conveyor bands each comprising a center dividing web separating the sand and the ballast on adjacent portions of the conveyor band to convey the separated sand and ballast to the exposed sub-grade section and to deposit the separated sand thereat a point ahead of a succeeding point where the separated ballast is deposited,
Claim 10
Dependent Claim
63 words
The method of claim 1, wherein ties fastened to two track rails are supported on the ballast bed and the separated sand is deposited between the rails while the separated ballast is deposited on the layer of sand by throwing at least a major portion of the separated ballast in the region of the ties ends and plowing it inwardly between the rails.
Claim 11
Dependent Claim
9 words
separating the sand and the ballast from each other,
Claim 12
Dependent Claim
9 words
separating the sand and the ballast from each other,
Claim 13
Dependent Claim
12 words
depositing the separated sand in a layer on the exposed sub-grade, and
Claim 14
Dependent Claim
12 words
depositing the separated sand in a layer on the exposed sub-grade, and
Claim 15
Independent Claim
18 words
An apparatus for stabilizing the sub-grade of a railroad ballast bed supporting ties fastened to track rails, comprising
Claim 16
Independent Claim
18 words
An apparatus for stabilizing the sub-grade of a railroad ballast bed supporting ties fastened to track rails, comprising
Claim 17
Dependent Claim
24 words
means for sweeping sand off the ties and for planing the sand on the exposed sub-grade, said means being arranged between said points, and
Claim 18
Dependent Claim
24 words
means for sweeping sand off the ties and for planing the sand on the exposed sub-grade, said means being arranged between said points, and
Claim 19
Dependent Claim
21 words
The apparatus of claim 4, further comprising means for pivoting each of the endless conveyor bands in a substantially horizontal plane.
Claim 20
Dependent Claim
13 words
a ballast guiding device associated with each conveyor band at the succeeding point.
Claim 21
Dependent Claim
13 words
a ballast guiding device associated with each conveyor band at the succeeding point.
Claim 22
Dependent Claim
9 words
depositing the separated ballast on the layer of sand.
Claim 23
Dependent Claim
9 words
depositing the separated ballast on the layer of sand.
Claim 24
Dependent Claim
36 words
The apparatus of claim 4, wherein one of the endless conveyor bands is associated with each of the track rails and extends therealong, the conveyor band portions facing the center of the track conveying the sand.
Claim 25
Dependent Claim
45 words
The apparatus of claim 4, wherein the means for sweeping sand off the ties comprises a longitudinal carrier means extending along and above each of the track rails, and a plurality of successive plow-like wiping plates mounted on the carrier means and extending transversely thereof.
Claim 26
Dependent Claim
18 words
The apparatus of claim 4, wherein the sand planing means is vertically adjustably mounted on the removing means.
References Cited (Backward Citations)
US2775438A
Cited
US3624936A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |