US3675581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mobile track tamping machine
Assignee: Franz Plasser Bahnbaumaschinen Industrie GmbH
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Filing: 1970-07-13
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Granted: 1972-07-11
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Expires: 1990-07-13
Abstract
Abstract A rotatable tamping tool carrier mounts a series of successive vibratory tamping tools extending in a vertical plane parallel to the track like spokes in a wheel about an axis of rotation extending transversely of the track. The tamping tool ends extend in a circle passing through the cribs beneath the tamping tool carrier whereby successive tamping tools continuously and successively tamp the ballast in successive cribs and under successive ties as the mobile track tamping machine, on which the carrier is mounted, continuously advances along the track.
Inventors
- 👤 Franz Plasser
- 👤 Josef Theurer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:13
CPC Classifications
E; E01; E01B; E01B27/00; E01B27/12; E01B27/13
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
202 words
A mobile track tamping machine, the track including two rails mounted on successive ties resting on ballast defining cribs between the ties, and the machine being continuously advanceable along the track in a working direction, comprising 1. a frame, 2. a tamping tool carrier mounted on the frame, a. the tamping tool carrier being rotatable in said direction about a horizontal axis extending perpendicularly and transversely to the track, and b. the advance of the machine being correlated with the speed of rotation of the carrier, and 3. a series of successive vibratory tamping tools mounted on the carrier in a vertical plane parallel to the track, a. the ends of the tamping tools extending about said carrier and successive ones of the tamping ends being engageable with the ballast in the cribs beneath the carrier to continuously and successively tamp the ballast in successive ones of the cribs and under successive ones of the ties as the machine continuously advances along the track, the machine advance and the rotational speed of the carrier being correlated to provide relative movement between the ballast and the engaged tamping tool ends, and b. the tamping tools being vertically adjustable in respect of the frame.
Claim 2
Dependent Claim
202 words
A mobile track tamping machine, the track including two rails mounted on successive ties resting on ballast defining cribs between the ties, and the machine being continuously advanceable along the track in a working direction, comprising 1. a frame, 2. a tamping tool carrier mounted on the frame, a. the tamping tool carrier being rotatable in said direction about a horizontal axis extending perpendicularly and transversely to the track, and b. the advance of the machine being correlated with the speed of rotation of the carrier, and 3. a series of successive vibratory tamping tools mounted on the carrier in a vertical plane parallel to the track, a. the ends of the tamping tools extending about said carrier and successive ones of the tamping ends being engageable with the ballast in the cribs beneath the carrier to continuously and successively tamp the ballast in successive ones of the cribs and under successive ones of the ties as the machine continuously advances along the track, the machine advance and the rotational speed of the carrier being correlated to provide relative movement between the ballast and the engaged tamping tool ends, and b. the tamping tools being vertically adjustable in respect of the frame.
Claim 3
Dependent Claim
47 words
a tamping tool carrier mounted on the frame, a. the tamping tool carrier being rotatable in said direction about a horizontal axis extending perpendicularly and transversely to the track, and b. the advance of the machine being correlated with the speed of rotation of the carrier, and
Claim 4
Dependent Claim
47 words
a tamping tool carrier mounted on the frame, a. the tamping tool carrier being rotatable in said direction about a horizontal axis extending perpendicularly and transversely to the track, and b. the advance of the machine being correlated with the speed of rotation of the carrier, and
Claim 5
Dependent Claim
16 words
The mobile track tamping machine of claim 1, wherein the tamping tool carrier is continuously rotatable.
Claim 6
Dependent Claim
33 words
The mobile track tamping machine of claim 1, wherein the tamping tools are substantially radially arranged on the tamping tool carrier, all angles between adjacent ones of the radially extending tools being equal.
Claim 7
Dependent Claim
114 words
a series of successive vibratory tamping tools mounted on the carrier in a vertical plane parallel to the track, a. the ends of the tamping tools extending about said carrier and successive ones of the tamping ends being engageable with the ballast in the cribs beneath the carrier to continuously and successively tamp the ballast in successive ones of the cribs and under successive ones of the ties as the machine continuously advances along the track, the machine advance and the rotational speed of the carrier being correlated to provide relative movement between the ballast and the engaged tamping tool ends, and b. the tamping tools being vertically adjustable in respect of the frame.
Claim 8
Dependent Claim
114 words
a series of successive vibratory tamping tools mounted on the carrier in a vertical plane parallel to the track, a. the ends of the tamping tools extending about said carrier and successive ones of the tamping ends being engageable with the ballast in the cribs beneath the carrier to continuously and successively tamp the ballast in successive ones of the cribs and under successive ones of the ties as the machine continuously advances along the track, the machine advance and the rotational speed of the carrier being correlated to provide relative movement between the ballast and the engaged tamping tool ends, and b. the tamping tools being vertically adjustable in respect of the frame.
Claim 9
Dependent Claim
43 words
The mobile track tamping machine of claim 1, further comprising means for adjusting the distance of the tamping tool ends from the axis of the carrier whereby the radius of said circle and the relative spacing of adjacent tamping tool ends is adjustable.
Claim 10
Dependent Claim
36 words
The mobile track tamping machine of claim 4, wherein each tamping tool comprises a tool holder and the tamping tool end is movably mounted on the holder for adjusting the distance thereof from the carrier axis.
Claim 11
Dependent Claim
20 words
The mobile track tamping machine of claim 5, wherein the tamping tool end is yieldably movably mounted on the holder.
Claim 12
Dependent Claim
21 words
The mobile track tamping machine of claim 4, further comprising power means for pressing the tamping tool end against the ballast.
Claim 13
Dependent Claim
40 words
The mobile track tamping machine of claim 1, further comprising a rotatable eccenter shaft supporting the tamping tool carrier, the eccenter shaft constituting a common means for vibrating the tamping tools mounted on the carrier upon rotating of the shaft.
Claim 14
Dependent Claim
51 words
The mobile track tamping machine of claim 8, wherein an even number of said tamping tools is symmetrically arranged on the tamping tool carrier about said shaft in said vertical plane, the eccentricity of one half of the tools being opposite to the eccentricity of the other half of the tools.
Claim 15
Dependent Claim
32 words
The mobile track tamping machine of claim 1, further comprising a separate means for vibrating each of said tamping tools, each vibrating means being arranged at the end of the tamping tool.
Claim 16
Dependent Claim
42 words
The mobile track tamping machine of claim 1, further comprising elements arranged on the tamping tool carrier for engagement with the track upon the continuous advance of the machine, said track engaging elements automatically rotating the carrier upon engagement with the track.
Claim 17
Dependent Claim
18 words
The mobile track tamping machine of claim 1, further comprising a drive for rotating the tamping tool carrier.
Claim 18
Dependent Claim
22 words
The mobile track tamping machine of claim 1, further comprising means for vertically adjustably mounting the tamping tool carrier on the frame.
Claim 19
Dependent Claim
29 words
The mobile track tamping machine of claim 1, further comprising means for adjustably mounting the tamping tool carrier on the frame for movement in the direction of the track.
Claim 20
Dependent Claim
22 words
The mobile track tamping machine of claim 14, wherein the means for moving the carrier in said direction includes a power drive.
Claim 21
Dependent Claim
82 words
The mobile track tamping machine of claim 1, wherein each tamping tool comprises a tamping tool holder and its end is replaceably mounted on the holder, the tamping tool end being of substantially T-shaped cross section to define a pair of concave tamping surfaces facing respective ones of a pair of ties defining the crib whereinto the tamping tool end is immersed while the cross bar of the T-shaped tamping tool end faces the ballast in the crib in a downward direction.
Claim 22
Dependent Claim
33 words
The mobile track tamping machine of claim 1, further comprising freely pivotal ballast tamping elements mounted at the tamping tool ends, said tamping elements having a curvilinear, convex tamping surface facing the ballast.
Claim 23
Dependent Claim
16 words
The mobile track tamping machine of claim 17, wherein the tamping elements are freely rotatable rollers.
Claim 24
Dependent Claim
17 words
The mobile track tamping machine of claim 17, wherein the tamping elements are convexly curved surface tampers.
Claim 25
Dependent Claim
38 words
The mobile track tamping machine of claim 1, wherein each tamping tool comprises a tamping tool holder and its end is replaceably mounted on the holder, at least some of the successive tamping tools having differently shaped ends.
Claim 26
Dependent Claim
24 words
The mobile track tamping machine of claim 1, wherein a separate one of said tamping tool carriers is associated with each of said rails.
Claim 27
Dependent Claim
42 words
The mobile track tamping machine of claim 1, further comprising a track moving unit mounted on the frame and a reference system arranged for cooperation with the moving unit to move the track in relation to and controlled by the reference system.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |