US3190376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boring head
Assignee: Individual
•
Filing: 1962-01-30
•
Granted: 1965-06-22
•
Expires: 1982-01-30
Abstract
No abstract record available.
Inventors
- 👤 Eugene A Christensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:25
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08; E21B10/16; E21B21/00; E21B21/12; E21B4/00; E21B4/04; E21B7/00; E21B7/003; E21B7/005; E21B7/04; E21B7/046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
AN EARTH BORING DEVICE COMPRISING TUBULAR CASING MEANS, MOUNTING PLATE MEANS FIXED TO THE CASING MEANS AND PROJECTING FORWARDLY THEREFROM, MOTOR MEANS MOUNTED BY THE PLATE MEANS FOR ROTATION ABOUT AN AXIS SPACED FORWARDLY OF THE CASING MEANS, ROTATABLE HUB MEANS CONNECTED TO THE MOTOR MEANS IN COMPLETE ENCLOSING RELATION THERETO ON OPPOSITE SIDES OF THE PLATES MEANS AND EXTENDING INTO AND OUT OF SAID CASING MEANS TO FORM THEREWITH AN ANNULAR INLET PASSAGE, AND EARTH CUTTING MEANS EXTERNALLY MOUNTED ON THE ROTATABLE HUB MEANS FOR DISLODGING AND DISPLACING EARTH REARWARDLY INTO SAID CASING MEANS THROUGH SAID INLET PASSAGE IN RESPONSE TO ROTATION OF THE HUB MEANS BY THE MOTOR MEANS.
Claim 2
Dependent Claim
111 words
AN EARTH BORING DEVICE COMPRISING TUBULAR CASING MEANS, MOUNTING PLATE MEANS FIXED TO THE CASING MEANS AND PROJECTING FORWARDLY THEREFROM, MOTOR MEANS MOUNTED BY THE PLATE MEANS FOR ROTATION ABOUT AN AXIS SPACED FORWARDLY OF THE CASING MEANS, ROTATABLE HUB MEANS CONNECTED TO THE MOTOR MEANS IN COMPLETE ENCLOSING RELATION THERETO ON OPPOSITE SIDES OF THE PLATES MEANS AND EXTENDING INTO AND OUT OF SAID CASING MEANS TO FORM THEREWITH AN ANNULAR INLET PASSAGE, AND EARTH CUTTING MEANS EXTERNALLY MOUNTED ON THE ROTATABLE HUB MEANS FOR DISLODGING AND DISPLACING EARTH REARWARDLY INTO SAID CASING MEANS THROUGH SAID INLET PASSAGE IN RESPONSE TO ROTATION OF THE HUB MEANS BY THE MOTOR MEANS.
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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) | 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 |