US3095051A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Earth boring auger and sampler
Assignee: Raymond Concrete Pile Co Ltd
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Filing: 1961-11-24
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Granted: 1963-06-25
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Expires: 1981-11-24
Abstract
No abstract record available.
Inventors
- 👤 Robinsky Eli Ivan
- 👤 Holland Henry A Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:37
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/02; E21B10/00; E21B10/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A CUTTING HEAD FOR ATTACHMENT TO A HOLLOW STEM EARTH BORING AUGER, SUCH CUTTING HEAD BEING FORMED WITH AN AXIAL CAVITY FOR COMMUNICATING WITH THE HOLLOW INTERIOR OF THE AUGER, MEANS FOR NORMALLY CLOSING SAID AXIAL CAVITY TO EXCLUDE EARTH DURING OPERATION OF THE CUTTING HEAD, SAID MEANS COMPRISING A PLURALITY OF MEMBERS OF RESILIENT SHEET MATERIAL PROVIDING A DOWNWARDLY DIRECTED CUSP-LIKE FORMATION, SAID MEMBERS BEING ADAPTED TO SEPARATE AT THE VERTEX OF THE CUSP AND ALLOWING A SAMPLING TOOL TO BE ADVANCED THROUGH SAID AXIAL CAVITY INTO THE EARTH BELOW THE CUTTER HEAD, SUCH RESILIENT MEMBERS BEING ADAPTED TO COME TOGETHER AGAIN TO CLOSE OFF SAID AXIAL CAVITY UPON UPWARD WITHDRAWAL OF THE SAMPLING TOOL.
Claim 2
Dependent Claim
116 words
A CUTTING HEAD FOR ATTACHMENT TO A HOLLOW STEM EARTH BORING AUGER, SUCH CUTTING HEAD BEING FORMED WITH AN AXIAL CAVITY FOR COMMUNICATING WITH THE HOLLOW INTERIOR OF THE AUGER, MEANS FOR NORMALLY CLOSING SAID AXIAL CAVITY TO EXCLUDE EARTH DURING OPERATION OF THE CUTTING HEAD, SAID MEANS COMPRISING A PLURALITY OF MEMBERS OF RESILIENT SHEET MATERIAL PROVIDING A DOWNWARDLY DIRECTED CUSP-LIKE FORMATION, SAID MEMBERS BEING ADAPTED TO SEPARATE AT THE VERTEX OF THE CUSP AND ALLOWING A SAMPLING TOOL TO BE ADVANCED THROUGH SAID AXIAL CAVITY INTO THE EARTH BELOW THE CUTTER HEAD, SUCH RESILIENT MEMBERS BEING ADAPTED TO COME TOGETHER AGAIN TO CLOSE OFF SAID AXIAL CAVITY UPON UPWARD WITHDRAWAL OF THE SAMPLING TOOL.
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) | 1966-06-24 | 1966-12-24 | 1967-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-24 | 1970-12-24 | 1971-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-24 | 1974-12-24 | 1975-06-25 | $7700.00 | Window Closed / Lapsed |