Logging grapple
Abstract
Abstract A PAIR OF OPPOSED ARCUATE TONGS OF A LOGGING GRAPPLE ARE RESPECTIVELY PIVOTED TO A PAIR OF LINKS, WHICH ARE, IN TURN, PIVOTED TO A YOKE. A ROTARY FLUID MOTOR IS SUPPORTED ON THE YOKE AND IS CONNECTED THERETO TO ROTATE THE SAME THROUGH 360*. A HYDRAULIC ACTUATOR HAS OPPOSITE ENDS PIVOTALLY CONNECTED TO THE TONGS. INTERCONNECTING THE PAIR OF LINKS IS A FIRST CROSS-CONNECTED LINK AND INTERCONNECTING THE TONGS ARE SECOND AND THIRD CROSS-CONNECTED LNKS, WHICH RESPECTIVELY CAUSE THE PAIR OF LNKS AND THE TONGS TO MOVE SYMMETRICALLY UPON EXTENSION AND RETRACTION OF THE HYDRAULIC ACTUATOR. THE VARIOUS PIVOT POINTS ARE SELECTED SUCH THAT THE SECOND AND THIRD CROSS-CONNECTED LINKS COOPERATE WITH THE TONGS TO GRIP LOGS WHEN THE ACTUATOR IS EXTENDED. ALSO, THE TONG AND LINKAGE ARRANGEMENT IS DESIGNED SO AS TO MAKE IT POSSIBLE TO PICK UP LARGE BUNDLES OF LOGS AS WELL AS SINGLE SMALL LOGS.
Inventors
- 👤 Welker W Funk
Bibliographic Details
Claims Analysis
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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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |