US3158944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bulldozer with resilient means for pushing operations
Assignee: Caterpillar Inc
•
Filing: 1963-02-20
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Granted: 1964-12-01
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Expires: 1983-02-20
Abstract
No abstract record available.
Inventors
- 👤 Thomas R Rehberg
- 👤 Kenneth R Robinson
- 👤 Francis X Hufeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:44
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/7609; E02F3/7618; E02F3/80; E02F3/815; E02F3/8157; E02F3/84; E02F3/844; E02F9/00; E02F9/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
IN COMBINATION WITH A TRACTOR AND A BULLDOZER BLADE CONNECTED THERETO BY PUSH ARMS, PIVOTAL CONNECTIONS BETWEEN THE LOWER PORTION OF THE BLADE AND THE PUSH ARMS, A HOUSING BEHIND THE BLADE PIVOTALLY CONNECTED THERETO COAXIALLY WITH THE PUSH ARM PIVOTS, SHOCK CUSHIONING MEANS BETWEEN THE BACK OF THE BLADE AND SAID HOUSING, AND ADJUSTABLE MEANS BETWEEN THE HOUSING AND THE PUSH ARMS TO VARY THE PITCH ATTITUDE OF THE BLADE WITH RESPECT TO THE GROUND.
Claim 2
Dependent Claim
76 words
IN COMBINATION WITH A TRACTOR AND A BULLDOZER BLADE CONNECTED THERETO BY PUSH ARMS, PIVOTAL CONNECTIONS BETWEEN THE LOWER PORTION OF THE BLADE AND THE PUSH ARMS, A HOUSING BEHIND THE BLADE PIVOTALLY CONNECTED THERETO COAXIALLY WITH THE PUSH ARM PIVOTS, SHOCK CUSHIONING MEANS BETWEEN THE BACK OF THE BLADE AND SAID HOUSING, AND ADJUSTABLE MEANS BETWEEN THE HOUSING AND THE PUSH ARMS TO VARY THE PITCH ATTITUDE OF THE BLADE WITH RESPECT TO THE GROUND.
References Cited (Backward Citations)
GB432304A
Cited
US2094515A
Cited
US2694267A
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US2749630A
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US2986827A
Cited
US3022587A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |