Patent US3242997A successfully refreshed from Google Patents.
US3242997A
Expired / Lapsed
US
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Pile driving apparatus and method
Assignee: PETER KIEWIT SONS CO
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Filing: 1963-01-31
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Granted: 1966-03-29
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Expires: 1983-01-31
Abstract
No abstract record available.
Inventors
- 👤 Alpo J Tokola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:49
CPC Classifications
E; E02; E02D; E02D7/00; E02D7/02; E02D13/00; E02D13/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
123 words
IN A PILE DRIVING APPARATUS, A FOLLOWER, MEANS FOR SUPPORTING THE FOLLOWER IN A GENERALLY VERTICAL POSITION, MEANS CARRIED ADJACENT THE LOWER END OF THE FOLLOWER FOR ENCOMPASSING THE UPPER END OF THE PILE TO GUIDE THE FOLLOWER ON THE PILE, A PILE CLAMP MOUNTED ON THE LOWER PORTION OF THE FOLLOWER, SAID PILE CLAMP BEING MOVABLE BETWEEN OPEN AND CLOSED POSITIONS TO PLACE COMPRESSIVE FORCES ON THE PILE IN A DIRECTION LATERAL TO THE LONGITUDINAL AXIS OF THE PILE WHEN THE PILE CLAMP IS CLOSED AND TO RELEASE THE PILE WHEN THE PILE CLAMP IS OPEN, MEANS OPERATIVELY CONNECTING THE FOLLOWER TO THE PILE CLAMP FOR GUIDING THE FOLLOWER AND PERMITTING RELATIVE VERTICAL MOVEMENT BETWEEN THE PILE CLAMP AND THE FOLLOWER, AND
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |