Patent US3308611A successfully refreshed from Google Patents.
US3308611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mowing attachment
Assignee: MO TRIM Inc
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Filing: 1964-01-20
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Granted: 1967-03-14
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Expires: 1984-01-20
Abstract
No abstract record available.
Inventors
- 👤 Barber Charles Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:51
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/835; A01D34/86; A01D34/866; A01D75/00; A01D75/18; A01D75/185; A01G; A01G3/00; A01G3/04; A01G3/0426
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
215 words
IN A MOWING ATTACHMENT FOR USE IN COMBINATION WITH A TRACTOR OR THE LIKE; A VERTICAL SUPPORT MAST ROTATABLE THROUGH AN ARC ABOUT A VERTICAL AXIS; A BOOM MEMBER PIVOTED AT ONE END TO SAID MAST FOR ROTATION IN A VERTICAL PLANE; A CUTTING HEAD SUPPORTED FROM THE OTHER END OF SAID BOOM MEMBER; A HOIST LEVER DISPOSED BELOW SAID BOOM MEMBER AND PIVOTED AT ONE END TO SAID MAST; A PISTON AND CYLINDER DEVICE DISPOSED BELOW SAID HOIST LEVER AND PIVOTED AT ITS ENDS TO SAID HOIST LEVER AND SAID MAST; A COMPRESSION SPRING BETWEEN SAID HOIST LEVER AND SAID BOOM MEMBER FOR REDUCING TRANSMITTAL OF VIBRATION AND VERTICAL SHOCK FORCES FROM SAID BOOM MEMBER TO SAID PISTON AND CYLINDER DEVICE; A CAM MEMBER HAVING A NOTCH THEREIN AND A CAM SURFACE ADJACENT SAID NOTCH, SAID CAM SURFACE EXTENDING IN A PLANE WHICH IS AT RIGHT ANGLES TO THE AXIS OF ROTATION OF SAID MAST; A MOVABLE CAM ENGAGING MEMBER, ONE OF SAID MEMBERS BEING FIXED WITH RESPECT TO SAID MAST AND THE OTHER BEING CARRIED BY SAID MAST; A SPRING URGING SAID CAM ENGAGING MEMBER INTO ENGAGEMENT WITH SAID CAM MEMBER SO AS TO RELEASABLY LATCH SAID MAST AGAINST ROTATION WHEN SAID MEMBER RESIDES IN SAID NOTCH, SAID CAM SURFACE HAVING A CONTOUR
Claim 2
Dependent Claim
215 words
IN A MOWING ATTACHMENT FOR USE IN COMBINATION WITH A TRACTOR OR THE LIKE; A VERTICAL SUPPORT MAST ROTATABLE THROUGH AN ARC ABOUT A VERTICAL AXIS; A BOOM MEMBER PIVOTED AT ONE END TO SAID MAST FOR ROTATION IN A VERTICAL PLANE; A CUTTING HEAD SUPPORTED FROM THE OTHER END OF SAID BOOM MEMBER; A HOIST LEVER DISPOSED BELOW SAID BOOM MEMBER AND PIVOTED AT ONE END TO SAID MAST; A PISTON AND CYLINDER DEVICE DISPOSED BELOW SAID HOIST LEVER AND PIVOTED AT ITS ENDS TO SAID HOIST LEVER AND SAID MAST; A COMPRESSION SPRING BETWEEN SAID HOIST LEVER AND SAID BOOM MEMBER FOR REDUCING TRANSMITTAL OF VIBRATION AND VERTICAL SHOCK FORCES FROM SAID BOOM MEMBER TO SAID PISTON AND CYLINDER DEVICE; A CAM MEMBER HAVING A NOTCH THEREIN AND A CAM SURFACE ADJACENT SAID NOTCH, SAID CAM SURFACE EXTENDING IN A PLANE WHICH IS AT RIGHT ANGLES TO THE AXIS OF ROTATION OF SAID MAST; A MOVABLE CAM ENGAGING MEMBER, ONE OF SAID MEMBERS BEING FIXED WITH RESPECT TO SAID MAST AND THE OTHER BEING CARRIED BY SAID MAST; A SPRING URGING SAID CAM ENGAGING MEMBER INTO ENGAGEMENT WITH SAID CAM MEMBER SO AS TO RELEASABLY LATCH SAID MAST AGAINST ROTATION WHEN SAID MEMBER RESIDES IN SAID NOTCH, SAID CAM SURFACE HAVING A CONTOUR
References Cited (Backward Citations)
US2791081A
Cited
US3045413A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |