US3264834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansible mandrel
Assignee: Shell USA Inc
•
Filing: 1963-03-28
•
Granted: 1966-08-09
•
Expires: 1983-03-28
Abstract
No abstract record available.
Inventors
- 👤 Charles L Guild
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:39
CPC Classifications
E; E02; E02D; E02D7/00; E02D7/28; E02D7/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
AN EXPANSIBLE MANDREL FOR INSERTION INTO AND FOR DRIVING AN EARTH ENTERING FORM FOR A CAST-IN-PLACE PILE, SAID MANDREL COMPRISING A TUBULAR MEMBER WHOSE CROSS SECTIONAL DIMENSIONS ARE SUCH THAT IT IS A FREE BUT CLOSE FIT IN SAID FORM, THE FORM-ENTERING END OF SAID TUBULAR MEMBER INCLUDING SPACED ARCUATE SECTIONS DEFINING LONGITUDINALLY EXTENDING, OPEN-ENDED SLOTS; RESILIENT MEANS INTERCONNECTING SAID SECTIONS ADJACENT SAID END AND DRAWING THEM INWARDLY TO MATERIALLY REDUCE THE CROSS SECTIONAL AREA OF SAID END TO FACILITATE ENTRY OF SAID TUBULAR MEMBER IN SAID FORM; ANNULAR, EXPANSIBLE FLUID PRESSURE OPERATED MEANS WITHIN SAID TUBULAR MEMBER PERIPHERALLY ENGAGING THE INTERIOR SURFACES OF SAID SECTIONS IN A CIRCUMFERENTIAL ZONE WHERE THEY ARE INCLINED INWARDLY BY
Claim 2
Dependent Claim
116 words
AN EXPANSIBLE MANDREL FOR INSERTION INTO AND FOR DRIVING AN EARTH ENTERING FORM FOR A CAST-IN-PLACE PILE, SAID MANDREL COMPRISING A TUBULAR MEMBER WHOSE CROSS SECTIONAL DIMENSIONS ARE SUCH THAT IT IS A FREE BUT CLOSE FIT IN SAID FORM, THE FORM-ENTERING END OF SAID TUBULAR MEMBER INCLUDING SPACED ARCUATE SECTIONS DEFINING LONGITUDINALLY EXTENDING, OPEN-ENDED SLOTS; RESILIENT MEANS INTERCONNECTING SAID SECTIONS ADJACENT SAID END AND DRAWING THEM INWARDLY TO MATERIALLY REDUCE THE CROSS SECTIONAL AREA OF SAID END TO FACILITATE ENTRY OF SAID TUBULAR MEMBER IN SAID FORM; ANNULAR, EXPANSIBLE FLUID PRESSURE OPERATED MEANS WITHIN SAID TUBULAR MEMBER PERIPHERALLY ENGAGING THE INTERIOR SURFACES OF SAID SECTIONS IN A CIRCUMFERENTIAL ZONE WHERE THEY ARE INCLINED INWARDLY BY
References Cited (Backward Citations)
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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) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |