Patent US2987981A successfully refreshed from Google Patents.
Patent US3343497A successfully refreshed from Google Patents.
US3343497A
Expired / Lapsed
US
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Railway track tamping apparatus
Assignee: Ivacan Inc
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Filing: 1966-07-25
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Granted: 1967-09-26
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Expires: 1986-07-25
Abstract
No abstract record available.
Inventors
- 👤 John K Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:54
CPC Classifications
E; E01; E01B; E01B27/00; E01B27/12; E01B27/13; E01B27/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A RAILROAD TAMPING DEVICE MOUNTED ON A RAILROAD VEHICLE FOR MOVEMENT ALONG THE TRACK, WHICH TAMPING DEVICE COMPRISES AT LEAST TWO PAIRS OF TAMPING UNITS ARRANGED ON THE VEHICLE LONGITUDINALLY OF THE TRACK, EACH UNIT OF EACH PAIR BEING SPACED APART LONGITUDINALLY OF THE TRACK SO AS TO SPAN A TIE THEREBETWEEN AND THE UNIT OF ONE PAIR ADJACENT THE UNIT OF THE OTHER PAIR BEING SPACED APART LONGITUDINALLY OF THE TRACK SO AS TO SPAN A TIE THEREBETWEEN; SQUEEZING MEANS FOR PIVOTING EACH UNIT OF EACH PAIR TOWARDS AND AWAY FROM THE OTHER UNIT OF ITS PAIR AND FOR PIVOTING THE SAID ADJACENT UNITS TOWARDS AND AWAY FROM EACH OTHER WHEREBY, IN OPERATION TO IMPART A SQUEEZING ACTION TO THE BALLAST BENEATH THE TIES BETWEEN EACH PAIR AND TO THE TIE BETWEEN SAID ADJACENT UNITS.
Claim 2
Dependent Claim
136 words
A RAILROAD TAMPING DEVICE MOUNTED ON A RAILROAD VEHICLE FOR MOVEMENT ALONG THE TRACK, WHICH TAMPING DEVICE COMPRISES AT LEAST TWO PAIRS OF TAMPING UNITS ARRANGED ON THE VEHICLE LONGITUDINALLY OF THE TRACK, EACH UNIT OF EACH PAIR BEING SPACED APART LONGITUDINALLY OF THE TRACK SO AS TO SPAN A TIE THEREBETWEEN AND THE UNIT OF ONE PAIR ADJACENT THE UNIT OF THE OTHER PAIR BEING SPACED APART LONGITUDINALLY OF THE TRACK SO AS TO SPAN A TIE THEREBETWEEN; SQUEEZING MEANS FOR PIVOTING EACH UNIT OF EACH PAIR TOWARDS AND AWAY FROM THE OTHER UNIT OF ITS PAIR AND FOR PIVOTING THE SAID ADJACENT UNITS TOWARDS AND AWAY FROM EACH OTHER WHEREBY, IN OPERATION TO IMPART A SQUEEZING ACTION TO THE BALLAST BENEATH THE TIES BETWEEN EACH PAIR AND TO THE TIE BETWEEN SAID ADJACENT UNITS.
References Cited (Backward Citations)
DE205532C
Cited
US2872878A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |