Patent US3689090A successfully refreshed from Google Patents.
US3689090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Excavator
Assignee: Individual
•
Filing: 1970-03-18
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Granted: 1972-09-05
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Expires: 1990-03-18
Abstract
Abstract An excavator wherein its machinery deck rests on the undercarriage frame so that said machinery deck retains a horizontal position regardless of the inclination angle of the undercarriage.
Inventors
- 👤 July Nekhemievich Dunaevsky
- 👤 Boris Nusimovich Tartakovsky
- 👤 Nikolai Arsentievich Zhukov
- 👤 Viktor Viktorovich Potapenko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:13
CPC Classifications
B; B62; B62D; B62D55/00; B62D55/06; B62D55/062; B60; B60G; B60G17/00; E; E02; E02F; E02F9/00; E02F9/02; E02F9/028; Y; Y10; Y10S; Y10S37/00; Y10S37/907
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
92 words
An excavator comprising an undercarriage; crawler tracks on said undercarriage for travel thereof on the ground; a rigid frame on said undercarriage; a machinery deck; means supporting said machinery deck on said frame to maintain the deck in horizontal attitude irrespective of the position of the frame, said means comprising a plate which is non-revolving in the horizontal plane, means rotatably supporting the machinery deck on said plate, a ball support between the plate and frame, and jack means between the plate and frame at a location spaced from said ball support.
Claim 2
Dependent Claim
92 words
An excavator comprising an undercarriage; crawler tracks on said undercarriage for travel thereof on the ground; a rigid frame on said undercarriage; a machinery deck; means supporting said machinery deck on said frame to maintain the deck in horizontal attitude irrespective of the position of the frame, said means comprising a plate which is non-revolving in the horizontal plane, means rotatably supporting the machinery deck on said plate, a ball support between the plate and frame, and jack means between the plate and frame at a location spaced from said ball support.
Claim 3
Dependent Claim
25 words
An excavator as claimed in claim 1 wherein said jack means comprises a plurality of jacks each at a location spaced from the ball support.
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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |