US3194329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic grab bucket
Assignee: CALWELD Inc
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Filing: 1964-06-11
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Granted: 1965-07-13
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Expires: 1984-06-11
Abstract
No abstract record available.
Inventors
- 👤 Richard A Wallers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:13
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/02; E21B7/022; E02; E02F; E02F3/00; E02F3/04; E02F3/46; E02F3/47; E21B11/00; E21B11/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
99 words
A HYDRAULIC GRAB BUCKET COMPRISING A SHELL, A DRIVE SHAFT MEANS ROTATABLY MOUNTED IN THE SHELL AND ADAPTED TO BE ROTATED BY POWER MEANS EXTERNAL OF SAID SHELL, HYDRAULIC PUMP MEANS MOUNTED IN SAID SHELL, SAID HYDRAULIC PUMP MEANS BEING OPERATIVELY CONNECTED TO SAID DRIVE SHAFT MEANS, A PLURALITY OF JAWS PIVOTALLY CARRIED BY SAID SHEL WHEREBY SAID JAWS ARE MOVABLE BETWEEN AN OPEN POSITION AND A CLOSED POSITION, HYDRAULIC RAM MEANS INTERCONNECTING SAID SHELL AND SAID JAWS WHEREBY SAID JAWS MAY BE PIVOTALLY MOVED, AND FLUID CONDUIT MEANS CONNECTING SAID HYDRAULIC PUMP MEANS AND SAID HYDRAULIC RAM MEANS.
References Cited (Backward Citations)
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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) | 1968-07-12 | 1969-01-11 | 1969-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-12 | 1973-01-11 | 1973-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-12 | 1977-01-11 | 1977-07-13 | $7700.00 | Window Closed / Lapsed |