US3291231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Post hole digger
Assignee: Individual
•
Filing: 1964-12-29
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Granted: 1966-12-13
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Expires: 1984-12-29
Abstract
No abstract record available.
Inventors
- 👤 Andrew E Kammer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:02
CPC Classifications
E; E21; E21B; E21B11/00; E21B11/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
194 words
A POST HOLE DIGGER DEVICE COMPRISING: (A) A CYLINDRICAL SLEEVE FOR CORING, RETAINING AND RELEASING SOIL, (B) A CIRCUMFERENTIAL ROW OF CUTTING TEETH ON THE LOWER TERMINAL END OF SAID SLEEVE, (C) AT LEAST ONE CUTTING BLADE INTERIORLY OF SAID SLEEVE HAVING A CUTTING EDGE ADJACENT THE BASE OF SAID CUTTING TEETH, (D) A HANDLE BAR REMOVABLY CONNECTED TO THE UPPER END OF SAID SLEEVE, (E) SAID CUTTING TEETH ARE EACH DEFLECTED OUTWARDLY OF THE OUTER CYLINDRICAL SURFACE OF SAID SLEEVE, AND (F) THE REMOVABLY CONNECTION OF SAID HANDLE BAR WITH SAID SLEEVE COMPRISING A PAIR OF DIAMETRICALLY POSITIONED REVERSE BAYONET SLOTS FORMED IN THE UPPER TERMINAL OF SAID SLEEVE AND OPENING INTO THE UPPER TERMINAL END OF SAID SLEEVE, WHEREBY SAID HANDLE BAR IS INSERTED HORIZONTALLY SIMULTANEOUSLY INTO BOTH BAYONT SLOTS AND RETAINED THEREIN BY A SLIGHT TURNING MOVEMENT, (G) A FLAT BLADE PORTION, (H) A CURVED BRACKET PORTION CORRESPONDING IN CURVATURE TO THE INSIDE CYLINDRICAL WALL CURVATURE OF SAID SLEEVE, (I) A LEADING CUTTING EDGE ON THE SAID BLADE PORTION EXTENDING TRANSVERSELY THEREOF, AND (J) MEANS RIGIDLY SECURING THE BRACKET PORTION OF SAID CUTTING BLADE TO THE INSIDE WALL OF SAID SLEEVE.
Claim 2
Dependent Claim
194 words
A POST HOLE DIGGER DEVICE COMPRISING: (A) A CYLINDRICAL SLEEVE FOR CORING, RETAINING AND RELEASING SOIL, (B) A CIRCUMFERENTIAL ROW OF CUTTING TEETH ON THE LOWER TERMINAL END OF SAID SLEEVE, (C) AT LEAST ONE CUTTING BLADE INTERIORLY OF SAID SLEEVE HAVING A CUTTING EDGE ADJACENT THE BASE OF SAID CUTTING TEETH, (D) A HANDLE BAR REMOVABLY CONNECTED TO THE UPPER END OF SAID SLEEVE, (E) SAID CUTTING TEETH ARE EACH DEFLECTED OUTWARDLY OF THE OUTER CYLINDRICAL SURFACE OF SAID SLEEVE, AND (F) THE REMOVABLY CONNECTION OF SAID HANDLE BAR WITH SAID SLEEVE COMPRISING A PAIR OF DIAMETRICALLY POSITIONED REVERSE BAYONET SLOTS FORMED IN THE UPPER TERMINAL OF SAID SLEEVE AND OPENING INTO THE UPPER TERMINAL END OF SAID SLEEVE, WHEREBY SAID HANDLE BAR IS INSERTED HORIZONTALLY SIMULTANEOUSLY INTO BOTH BAYONT SLOTS AND RETAINED THEREIN BY A SLIGHT TURNING MOVEMENT, (G) A FLAT BLADE PORTION, (H) A CURVED BRACKET PORTION CORRESPONDING IN CURVATURE TO THE INSIDE CYLINDRICAL WALL CURVATURE OF SAID SLEEVE, (I) A LEADING CUTTING EDGE ON THE SAID BLADE PORTION EXTENDING TRANSVERSELY THEREOF, AND (J) MEANS RIGIDLY SECURING THE BRACKET PORTION OF SAID CUTTING BLADE TO THE INSIDE WALL OF SAID SLEEVE.
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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |