Patent US3181256A successfully refreshed from Google Patents.
US3181256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Back-filling blade for a power shovel
Assignee: Individual
•
Filing: 1962-03-28
•
Granted: 1965-05-04
•
Expires: 1982-03-28
Abstract
No abstract record available.
Inventors
- 👤 Discenza Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:47
CPC Classifications
E; E02; E02F; E02F5/00; E02F5/22; E02F5/223
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
IN COMBINATION WITH AN EXCAVATING BUCKET OF THE TYPE HAVING OPPOSED SIDES, AN OPEN FRONT, AND A PLURALITY OF LATERALLY SPACED DIGGING TEETH ALONG THE LOWER FORWARD EDGE THEREOF, BACK-FILLING ATTACHMENT COMPRISING A BLADE INCLUDING AN ELONGATED FRONT PLATE OF GENERALLY RECTANGULAR FORM ATTACHED TO SAID BUCKET IN A SUBSTANTIALLY UPRIGHT POSITION AND EXTENDING OUTWARDLY OF SAID OPPOSED SIDES THEREOF WITH ITS LONGITUDINAL AXIS SUBSTANTIALLY PARALLEL TO THE GROUND, SAID BLADE HAVING A RELATIVELY FLAT UPPER PORTION AND A FORWARDLY ANGLED LOWER PORTION, SAID ANGLED LOWER PORTION OVERLYING AND SHIEDING SAID PLURALITY OF TEETH TO PREVENT SCARRING OF THE GROUND WHEN SAID SHOVEL IS CONVERTED TO BACK-FILLING PURPOSED, A LONGITUDINALLY EXTENDING SUPPORTING BAR ALONG THE BACK OF SAID ANGLED PORTION IN ENGAGEMENT WITH THE BASE OF SAID TEETH, SAID BLADE HAVING UPPER ABUTMENT SURFACES IN ENGAGEMENT WITH THE SIDES OF SAID BUCKET, AND MEANS FOR REMOVABLY SECURING SAID ABUTMENT SURFACES TO SAID OPPOSED SIDES.
Claim 2
Dependent Claim
154 words
IN COMBINATION WITH AN EXCAVATING BUCKET OF THE TYPE HAVING OPPOSED SIDES, AN OPEN FRONT, AND A PLURALITY OF LATERALLY SPACED DIGGING TEETH ALONG THE LOWER FORWARD EDGE THEREOF, BACK-FILLING ATTACHMENT COMPRISING A BLADE INCLUDING AN ELONGATED FRONT PLATE OF GENERALLY RECTANGULAR FORM ATTACHED TO SAID BUCKET IN A SUBSTANTIALLY UPRIGHT POSITION AND EXTENDING OUTWARDLY OF SAID OPPOSED SIDES THEREOF WITH ITS LONGITUDINAL AXIS SUBSTANTIALLY PARALLEL TO THE GROUND, SAID BLADE HAVING A RELATIVELY FLAT UPPER PORTION AND A FORWARDLY ANGLED LOWER PORTION, SAID ANGLED LOWER PORTION OVERLYING AND SHIEDING SAID PLURALITY OF TEETH TO PREVENT SCARRING OF THE GROUND WHEN SAID SHOVEL IS CONVERTED TO BACK-FILLING PURPOSED, A LONGITUDINALLY EXTENDING SUPPORTING BAR ALONG THE BACK OF SAID ANGLED PORTION IN ENGAGEMENT WITH THE BASE OF SAID TEETH, SAID BLADE HAVING UPPER ABUTMENT SURFACES IN ENGAGEMENT WITH THE SIDES OF SAID BUCKET, AND MEANS FOR REMOVABLY SECURING SAID ABUTMENT SURFACES TO SAID OPPOSED SIDES.
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) | 1968-05-03 | 1968-11-02 | 1969-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-03 | 1972-11-02 | 1973-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-03 | 1976-11-02 | 1977-05-04 | $7700.00 | Window Closed / Lapsed |