Patent US3209473A successfully refreshed from Google Patents.
US3209473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trench digging machine with dirt deflecting assembly
Assignee: Individual
•
Filing: 1963-03-21
•
Granted: 1965-10-05
•
Expires: 1983-03-21
Abstract
No abstract record available.
Inventors
- 👤 Charles J Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:01
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/08; E02F3/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A TRENCH DIGGING MACHINE COMPRISING: A DIGGER BOOM; AN ANDLESS DIGGER CHAIN ENTRAINED ABOUT THE ENDS OF THE DIGGER BOOM; DRIVE MEANS OPERATIVELY CONNECTED TO DRIVE THE DIGGER CHAIN; AUGER MEANS MOUNTED ON THE DIGGER BOOM IN A POSITION INTEREDIATE THE ENDS THEREOF AND EXTENDING LATERALLY AT GROUND LEVEL TO ONE SIDE OF THE BOOM WHEN THE BOOM IS IN DIGGING POSITION, SAID AUGER MEANS BEING ADAPTED TO CONVEY DIRT EXCAVATED BY THE DIGGER CHAIN FROM THE TRENCH TO SAID ONE SIDE THEREOF AT GROUND LEVEL; MEANS DRIVINGLY INTERCONNECTING THE DIGGER CHAIN AND THE AUGER MEANS FOR ROTATING THE LATTER IN A DIRECTION TO MOVE DIRT AWAY FROM THE TRENCH;
Claim 2
Dependent Claim
110 words
A TRENCH DIGGING MACHINE COMPRISING: A DIGGER BOOM; AN ANDLESS DIGGER CHAIN ENTRAINED ABOUT THE ENDS OF THE DIGGER BOOM; DRIVE MEANS OPERATIVELY CONNECTED TO DRIVE THE DIGGER CHAIN; AUGER MEANS MOUNTED ON THE DIGGER BOOM IN A POSITION INTEREDIATE THE ENDS THEREOF AND EXTENDING LATERALLY AT GROUND LEVEL TO ONE SIDE OF THE BOOM WHEN THE BOOM IS IN DIGGING POSITION, SAID AUGER MEANS BEING ADAPTED TO CONVEY DIRT EXCAVATED BY THE DIGGER CHAIN FROM THE TRENCH TO SAID ONE SIDE THEREOF AT GROUND LEVEL; MEANS DRIVINGLY INTERCONNECTING THE DIGGER CHAIN AND THE AUGER MEANS FOR ROTATING THE LATTER IN A DIRECTION TO MOVE DIRT AWAY FROM THE TRENCH;
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) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |