US3797397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool for ballast tamping machine
Assignee: Individual
•
Filing: 1971-08-24
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Granted: 1974-03-19
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Expires: 1991-08-24
Abstract
Abstract Railway track ballast compressing and shifting apparatus wherein there is provided at least one vibrating tamper tool acting on the ballast between sleepers for simultaneously compressing and shifting the ballast to fill voids beneath the sleepers.
Inventors
- 👤 J Eisenmann
- 👤 H Helgemeir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:00
CPC Classifications
E; E01; E01B; E01B27/00; E01B27/12; E01B27/13; E01B27/16
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
100 words
A tamping-tool for use in conjunction with a railway track ballast tamping machine adapted to force the ballast between sleepers up under said sleepers to fill voids thereunder, said machine having means for applying downward and vibrating forces to the tool, said tool comprising a vertical support member, a horizontal pressure plate affixed to the lower end of the support member for applying downward pressure on the ballast, a shaker bar horizontally disposed beneath and spaced from the horizontal pressure plate for applying transverse vibrations to the ballast, and means for rigidly connecting the shaker bar to the pressure plate.
Claim 2
Dependent Claim
100 words
A tamping-tool for use in conjunction with a railway track ballast tamping machine adapted to force the ballast between sleepers up under said sleepers to fill voids thereunder, said machine having means for applying downward and vibrating forces to the tool, said tool comprising a vertical support member, a horizontal pressure plate affixed to the lower end of the support member for applying downward pressure on the ballast, a shaker bar horizontally disposed beneath and spaced from the horizontal pressure plate for applying transverse vibrations to the ballast, and means for rigidly connecting the shaker bar to the pressure plate.
Claim 3
Dependent Claim
50 words
The tamping tool of claim 1 and wherein the means for rigidly connecting the shaker bar to the pressure plate comprises a pair of brackets, one connected to and extending downwardly from each end of the pressure plate, the other end of each bracket being affixed to the shaker bar.
Claim 4
Dependent Claim
17 words
The tamping tool of claim 1 and wherein rotary vibrating means are provided in the vertical support.
Claim 5
Dependent Claim
22 words
The tamping tool of claim 1 and wherein resilient means are provided for connecting the vertical support to the ballast tamping machine.
Claim 6
Dependent Claim
31 words
The tamping tool of claim 2 and wherein the surface of the shaker bar which acts against the ballast is substantially greater than that of the brackets supporting the shaker bar.
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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |