US3245560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material handling machine
Assignee: Doosan Bobcat North America Inc
•
Filing: 1964-10-22
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Granted: 1966-04-12
•
Expires: 1984-10-22
Abstract
No abstract record available.
Inventors
- 👤 Clarence E Killebrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:23
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/20; E02F9/22; E02F9/2203
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
IN A MATERIAL HANDLING MACHINE HAVING A BODY PORTION, THE COMBINATION OF AN OUTWARDLY PROJECTING BOOM ARM WHICH IS PIVOTALLY CONNECTED TO THE BODY PORTION AND CARRIES A MATERIAL ENGAGING DEVICE, A HYDRAULIC ACTUATOR CONNECTED TO SAID BOOM ARM FOR RAISING THE SAID BOOM ARM, THE SAID ACTUATOR INCLUDING TWO ELONGATED PISTON AND CYLINDER DEVICES CONNECTED TOGETHER COAXIALLY TO FORM A COMPOSITE ACTUATOR, AND MEANS FOR EXTENDING THE SAID PISTON AND CYLINDER DEVICES SEQUENTIALLY.
Claim 2
Dependent Claim
74 words
IN A MATERIAL HANDLING MACHINE HAVING A BODY PORTION, THE COMBINATION OF AN OUTWARDLY PROJECTING BOOM ARM WHICH IS PIVOTALLY CONNECTED TO THE BODY PORTION AND CARRIES A MATERIAL ENGAGING DEVICE, A HYDRAULIC ACTUATOR CONNECTED TO SAID BOOM ARM FOR RAISING THE SAID BOOM ARM, THE SAID ACTUATOR INCLUDING TWO ELONGATED PISTON AND CYLINDER DEVICES CONNECTED TOGETHER COAXIALLY TO FORM A COMPOSITE ACTUATOR, AND MEANS FOR EXTENDING THE SAID PISTON AND CYLINDER DEVICES SEQUENTIALLY.
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |