US3352038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prestressed drag shell construction or bucket
Assignee: Individual
•
Filing: 1964-11-02
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Granted: 1967-11-14
•
Expires: 1984-11-02
Abstract
No abstract record available.
Inventors
- 👤 Kalve Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:20
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/46; E02F3/58; E02F3/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A DRAGSCRAPER BUCKET COMPRISING: A GENERALLY CRESCENT-SHAPED WALL DEFINING AN OPEN BOTTOM AND A FRONT OPENING; A PRESTRESSING BAND SPACED FROM THE PERIPHERY OF SAID WALL; AND MEANS ATTACHING SAID BAND TO SAID PERIPHERY AND STRESSING SAID WALL FROM A NEUTRAL POSITION TO A NORMAL PRESTRESSED POSITION WHEREIN THE ENDS OF SAID WALL ARE URGED APART TO A PREDETERMINED EXTENT SUCH THAT UNDER LOAD STRESSES PLACED ON THE BUCKET ARE SUBSTANTIALLY NEUTRALIZED WHEREBY TO ENABLE THE BUCKET TO BE USED WITHOUT CROSS-BAR YOKE MEANS BETWEEN THE FRONT ENDS OF SAID WALL.
Claim 2
Dependent Claim
91 words
A DRAGSCRAPER BUCKET COMPRISING: A GENERALLY CRESCENT-SHAPED WALL DEFINING AN OPEN BOTTOM AND A FRONT OPENING; A PRESTRESSING BAND SPACED FROM THE PERIPHERY OF SAID WALL; AND MEANS ATTACHING SAID BAND TO SAID PERIPHERY AND STRESSING SAID WALL FROM A NEUTRAL POSITION TO A NORMAL PRESTRESSED POSITION WHEREIN THE ENDS OF SAID WALL ARE URGED APART TO A PREDETERMINED EXTENT SUCH THAT UNDER LOAD STRESSES PLACED ON THE BUCKET ARE SUBSTANTIALLY NEUTRALIZED WHEREBY TO ENABLE THE BUCKET TO BE USED WITHOUT CROSS-BAR YOKE MEANS BETWEEN THE FRONT ENDS OF SAID WALL.
References Cited (Backward Citations)
US1741167A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |