Patent US3739823A successfully refreshed from Google Patents.
US3739823A
Expired / Lapsed
US
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Device for cutting tree stumps
Assignee: Pettibone Corp
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Filing: 1971-12-06
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Granted: 1973-06-19
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Expires: 1991-12-06
Abstract
Abstract A device for cutting tree stumps including a support with a pair of cutters pivotally mounted thereon each cutter having a pair of side plates connected by a combination bottom end wall, the edge of each side plate bottom and end wall having a sharpened edge and the cutters in direct opposed relation and a hydraulic ram connected to each of said cutters and the support for pivotally moving said cutters together and apart for cutting a tree stump therebetween.
Inventors
- 👤 M Bartell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:57
CPC Classifications
A; A01; A01G; A01G23/00; A01G23/02; A01G23/06; A01G23/067
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
123 words
A device for cutting tree stumps: a. a first support plate, b. a second support plate, c. means connecting said support plates in spaced parallel relation, d. a first cutter member pivotally mounted on the lower ends of said support plates, e. a second cutter member pivotally mounted on the lower ends of said support plates in opposed relation to said first cutter member, f. a first hydraulic ram pivotally connected at its upper end to the upper ends of said support plates and at its lower end to said first cutter member, and g. a second hydraulic ram pivotally connected at its upper end to the upper ends of said support plates and at its lower end to said second cutter member.
Claim 2
Independent Claim
123 words
A device for cutting tree stumps: a. a first support plate, b. a second support plate, c. means connecting said support plates in spaced parallel relation, d. a first cutter member pivotally mounted on the lower ends of said support plates, e. a second cutter member pivotally mounted on the lower ends of said support plates in opposed relation to said first cutter member, f. a first hydraulic ram pivotally connected at its upper end to the upper ends of said support plates and at its lower end to said first cutter member, and g. a second hydraulic ram pivotally connected at its upper end to the upper ends of said support plates and at its lower end to said second cutter member.
Claim 3
Dependent Claim
31 words
The device of claim 1 in which: a. each of said cutter members includes a pair of side plates having sharpened edges, and b. a bottom wall having a sharpened edge.
References Cited (Backward Citations)
US1509994A
Cited
US2820493A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |