US3717269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mobile shovel excavator
Assignee: SCHAEFF K KG MASCHINENFAB
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Filing: 1971-03-22
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Granted: 1973-02-20
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Expires: 1991-03-22
Abstract
Abstract A MOBILE EXCAVATOR, IN WHICH THE DIGGING TOOL, SHOVEL ARM AND JIB ARE MOUNTED ON A SUPERSTRUCTURE FOR PIVOTED MOVEMENT AND IN A COMMON VERTICAL PLANE, AND THE SUPERSTRUCTURE, IS ROTATABLY MOUNTED ON A WHEELED OR TRACKED VEHICLE FOR MOVEMENT THROUGH A 360* ARC. THE JIB IS ATTACHED TO THE SUPERSTRUCTURE BY MEANS OF A BRACKET WHICH PERMITS PIVOTED MOVEMENT OF THE JIB ABOUT EITHER VERTICAL OR HORIZONTAL AXIS SO THAT NARROW TRENCHES EXTENDING PARALLEL TO THE JIB MAY BE DUG ADJACENT WALLS AND OTHER STRUCTURES. D R A W I N G
Inventors
- 👤 H Schaeff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:05
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/36; E02F3/38; E02F3/382; E02F3/384
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |