Patent US3190078A successfully refreshed from Google Patents.
US3190078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pile driving mandrel assembly
Assignee: MILLGARD Corp A CORP OF MICH
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Filing: 1962-06-11
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Granted: 1965-06-22
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Expires: 1982-06-11
Abstract
No abstract record available.
Inventors
- 👤 Rusche Fredric
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:00
CPC Classifications
E; E02; E02D; E02D7/00; E02D7/28; E02D7/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
A FLUID PRESSURE OPERATED, EXPANDING PLUG TYPE MANDREL ASSEMBLY FOR DRIVING HOLLOW TUBULAR PILE SHELLS AND THE LIKE ELONGATED FORMS COMPRISING: FIRST AND SECOND COAXIALLY ALIGNED EXTERNAL TUBULAR CORES INSERTABLE WITHIN SAID FORMS, SAID CORES EACH HAVING RADIAL APERTURES THERETHROUGH, A DRIVING HEAD ENGAGED WITH ONE END OF SAID FIRST CORE TO RECEIVE AND TRANSMIT HEAVY BLOWS TO SAID FIRST CORE AXIALLY THEREOF; GRIPPING PLUGS RECEIVED IN SAID APERTURES FOR RADIAL MOVEMENT INTO AND OUT OF GRIPPING ENGAGEMENT WITH SAID FORMSF FLUID PRESSURE INFLATABLE MEANS IN EACH CORE ACTING RADIALLY OF SAID PLUGS TO URGE SAME OUTWARDLY TO PRODUCE SAID GRIPPING ENGAGEMENT; ELONGATED PRESSURE TRANSMITTING MEANS BETWEEN EACH OF SAID INFLATABLE MEANS AND THE PLUGS IN EACH CORE TO TRANSMIT FORCE TO AND GUIDE SAID PLUGS; COUPLING MEANS INERTED BETWEEN SAID JOINING SAID FIRST CORE TO SAID SECOND CORE; AND FLUID DISTRIBUTION MEANS FOR CHANNELING PRESSURE FROM A SOURCE OF PRESSURIZED FLUID TO THE BLADDER MEANS IN SAID FIRST AND SECOND CORES.
Claim 2
Dependent Claim
162 words
A FLUID PRESSURE OPERATED, EXPANDING PLUG TYPE MANDREL ASSEMBLY FOR DRIVING HOLLOW TUBULAR PILE SHELLS AND THE LIKE ELONGATED FORMS COMPRISING: FIRST AND SECOND COAXIALLY ALIGNED EXTERNAL TUBULAR CORES INSERTABLE WITHIN SAID FORMS, SAID CORES EACH HAVING RADIAL APERTURES THERETHROUGH, A DRIVING HEAD ENGAGED WITH ONE END OF SAID FIRST CORE TO RECEIVE AND TRANSMIT HEAVY BLOWS TO SAID FIRST CORE AXIALLY THEREOF; GRIPPING PLUGS RECEIVED IN SAID APERTURES FOR RADIAL MOVEMENT INTO AND OUT OF GRIPPING ENGAGEMENT WITH SAID FORMSF FLUID PRESSURE INFLATABLE MEANS IN EACH CORE ACTING RADIALLY OF SAID PLUGS TO URGE SAME OUTWARDLY TO PRODUCE SAID GRIPPING ENGAGEMENT; ELONGATED PRESSURE TRANSMITTING MEANS BETWEEN EACH OF SAID INFLATABLE MEANS AND THE PLUGS IN EACH CORE TO TRANSMIT FORCE TO AND GUIDE SAID PLUGS; COUPLING MEANS INERTED BETWEEN SAID JOINING SAID FIRST CORE TO SAID SECOND CORE; AND FLUID DISTRIBUTION MEANS FOR CHANNELING PRESSURE FROM A SOURCE OF PRESSURIZED FLUID TO THE BLADDER MEANS IN SAID FIRST AND SECOND CORES.
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) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |