US3835901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tree felling device
Assignee: Individual
•
Filing: 1973-11-13
•
Granted: 1974-09-17
•
Expires: 1993-11-13
Abstract
Abstract A rotary saw ring formed as an annular segment of a spherical bowl and adapted to be swung around the centre of an imagined sphere, in which said segment ring is included.
Inventors
- 👤 K Jonsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:04
CPC Classifications
A; A01; A01G; A01G23/00; A01G23/02; A01G23/08; A01G23/091; B; B27; B27B; B27B5/00; B27B5/14; Y; Y10; Y10T; Y10T83/00; Y10T83/707; Y10T83/7101; Y10T83/7114; Y10T83/869; Y10T83/929; Y10T83/9319
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
84 words
A tree felling device adapted to be suspended in a crane beam carried by a vehicle, comprising a ring formed as an annular segment of a spherical bowl and provided with saw teeth along its greater periphery, said teeth constituting a continuation of the profile of the bowl and having their edges directed peripherically, means for rotating said ring around its axis, and means for pivoting the ring a limited angle around the centre of an imagined sphere in which the bowl is included.
Claim 2
Dependent Claim
84 words
A tree felling device adapted to be suspended in a crane beam carried by a vehicle, comprising a ring formed as an annular segment of a spherical bowl and provided with saw teeth along its greater periphery, said teeth constituting a continuation of the profile of the bowl and having their edges directed peripherically, means for rotating said ring around its axis, and means for pivoting the ring a limited angle around the centre of an imagined sphere in which the bowl is included.
Claim 3
Dependent Claim
32 words
A tree felling device as claimed in claim 1, in which the ring is pivotable on an axis extending through said centre substantially perpendicularily to the axis of rotation of the ring.
Claim 4
Dependent Claim
48 words
A tree felling device as claimed in claim 1, in which the ring is carried by a supporTing member stationary in relation to the ring, and a motor carried by said supporting member is connected to a tooth wheel engaging a peripheral row of bores in the ring.
Claim 5
Dependent Claim
27 words
A tree felling device as claimed in claim 1, in which the saw teeth are secured in a groove in the outer end surface of the ring.
Claim 6
Dependent Claim
41 words
A tree felling device as claimed in claim 3, in which the supporting member consists of an arcuate casing surrounding a section of the ring and in its interior provided with guide rollers arranged to engage the ring at both sides.
Claim 7
Dependent Claim
35 words
A tree felling device as claimed in claim 1, in which the ring is journalled at the edge of a spherical bowl having the same curvature, said bowl being pivotably suspended in a crane beam.
Claim 8
Dependent Claim
25 words
A tree felling device as claimed in claim 6, in which the ring is guided in a groove in the edge portion of the bowl.
Claim 9
Dependent Claim
58 words
A tree felling device as claimed in claim 7, in which the driving tooth wheel engages the bores in the ring through an opening in one wall of the guide groove, and the opposite wall of said groove has another opening, through which a roller engages the ring to serve as a counter support to the tooth wheel.
Claim 10
Dependent Claim
27 words
A tree felling device as claimed in claim 1, in which the saw teeth have a width at least equal to the wall thickness of the ring.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |