Patent US3274908A successfully refreshed from Google Patents.
US3274908A
Expired / Lapsed
US
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Tamping device
Assignee: Caterpillar Inc
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Filing: 1964-07-22
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Granted: 1966-09-27
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Expires: 1984-07-22
Abstract
No abstract record available.
Inventors
- 👤 Gerald E Grant
- 👤 Eugene L Helton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:50
CPC Classifications
E; E02; E02D; E02D3/00; E02D3/02; E02D3/026
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
A TAMPING DEVICE COMPRISING AN ELONGATED SUPPORT MEMBER HAVING A BASE PORTION AND A PROJECTING PORTION WITH INWARDLY OFFSET SIDE WALLS TERMINATING AT ANGULARLY RELATED PLANAR TOP SURFACES, A HOLLOW TAMPING FOOT FORMED TO BE FREELY RECEIVED ON SAID PROJECTING PORTION AND INCLUDING ANGULARLY RELATED PLANAR SURFACES WHICH MATE IN CONTACT WITH THE FIRST MENTIONED PLANAR SURFACES, SAID TAMPING FOOT BEING FORMED TO SUBSTANTIALLY ENCLOSE SAID INWARDLY OFFSET SIDE WALLS, A RETAINING MEMBER LOCATED THROUGH AXIALLY ALIGNED OPENINGS IN SAID PROJECTING PORTION AND IN SAID FOOT FOR RELEASABLY HOLDING SAID FOOT ON SAID SUPPORT MEMBER, SAID OPENING IN SAID PROJECTING PORTION BEING OF SUFFICIENT SIZE TO ALLOW SAID RETAINING MEMBER A LIMITED DEGREE OF TRANSVERSE MOVEMENT WHEREAS THE OPENINGS IN SAID FOOT CLOSELY RECEIVE SAID RETAINING MEMBER, A DETENT MECHANISM LOCATED OUTBOARD OF SAID OPENING IN SAID PROJECTING PORTION INCLUDING A RESILIENTLY BIASED MEMBER ENGAGEABLY WITH A PERIPHERAL PORTION OF SAID RETAINING MEMBER FOR URGING THE ANGULARLY MATED SURFACES ON SAID PROJECTING PORTION AND ON SAID TAMPING FOOT IN FORCEABLE CONTACT.
Claim 2
Dependent Claim
171 words
A TAMPING DEVICE COMPRISING AN ELONGATED SUPPORT MEMBER HAVING A BASE PORTION AND A PROJECTING PORTION WITH INWARDLY OFFSET SIDE WALLS TERMINATING AT ANGULARLY RELATED PLANAR TOP SURFACES, A HOLLOW TAMPING FOOT FORMED TO BE FREELY RECEIVED ON SAID PROJECTING PORTION AND INCLUDING ANGULARLY RELATED PLANAR SURFACES WHICH MATE IN CONTACT WITH THE FIRST MENTIONED PLANAR SURFACES, SAID TAMPING FOOT BEING FORMED TO SUBSTANTIALLY ENCLOSE SAID INWARDLY OFFSET SIDE WALLS, A RETAINING MEMBER LOCATED THROUGH AXIALLY ALIGNED OPENINGS IN SAID PROJECTING PORTION AND IN SAID FOOT FOR RELEASABLY HOLDING SAID FOOT ON SAID SUPPORT MEMBER, SAID OPENING IN SAID PROJECTING PORTION BEING OF SUFFICIENT SIZE TO ALLOW SAID RETAINING MEMBER A LIMITED DEGREE OF TRANSVERSE MOVEMENT WHEREAS THE OPENINGS IN SAID FOOT CLOSELY RECEIVE SAID RETAINING MEMBER, A DETENT MECHANISM LOCATED OUTBOARD OF SAID OPENING IN SAID PROJECTING PORTION INCLUDING A RESILIENTLY BIASED MEMBER ENGAGEABLY WITH A PERIPHERAL PORTION OF SAID RETAINING MEMBER FOR URGING THE ANGULARLY MATED SURFACES ON SAID PROJECTING PORTION AND ON SAID TAMPING FOOT IN FORCEABLE CONTACT.
References Cited (Backward Citations)
US2994140A
Cited
US3099191A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |