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US3565138A Expired / Lapsed US ⏱️ 0.0 years remaining

Apparatus and method for felling trees

Assignee: Individual
•
Filing: 1968-10-03
•
Granted: 1971-02-23
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Expires: 1988-10-03
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Abstract

Abstract A chain saw mounted on and running around a transversely wedgeshaped cutter bar, in cutting and noncutting said cutter bar being directly hinged to a second hollow bar or anvil, and operable by a hydraulic cylinder mounted therein and operably attached therebetween to open and close in cooperation with the cutter bar and chain saw as a pair of scissors, said hollow anvil bar being opposed to the narrow edge of the transversely wedged cutter bar, and receiving therein said narrow edge and the cutting run of the chain saw, the noncutting run being recessed into the broad edge of said cutter bar.

Inventors

  • 👤 Alva Z Albright

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-27 17:40
CPC Classifications
B; B27; B27B; B27B17/00; B27B17/02; A; A01; A01G; A01G23/00; A01G23/02; A01G23/08; A01G23/091; Y; Y10; Y10S; Y10S83/00; Y10S83/928; Y10T; Y10T83/00; Y10T83/707; Y10T83/7101; Y10T83/7114

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 239 words
An improved tree cutting apparatus comprising in combination: a chain saw having a cutter bar with a projecting flange adjacent one end there of, and a saw chain peripherally mounted for rotation around said cutter bar in cutting and noncutting runs, the edge of said cutter bar adjacent said noncutting run defining a recess for receiving said latter run therein for preventing a cut and falling tree from stripping the saw chain off the cutter bar and also to prevent said latter run from engaging adjacent objects; a hollow anvil directly pivoted by an end to said cutter bar adjacent its flanged end for scissors action therewith, said hollow anvil having parallel inner edges opposing the cutter bar and an oppositely disposed closed back, said inner edges receiving the cutting run and adjacent edge of the cutter bar for shielding them from a cut and falling tree; driving means mounted on said cutter bar behind the pivot with the anvil to remove it from range of tree damage and for driving the saw chain; reciprocating power means pivotally mounted in said hollow anvil for protection from a cut and falling tree, and pivotally connected with said projecting flange to pivot the chain saw and the anvil in scissors action for engaging and cutting a tree therebetween, whereby both runs of saw chain, the reciprocating power means and the driving means are prevented from becoming casualties of their operating results.
Claim 2
Dependent Claim 239 words
An improved tree cutting apparatus comprising in combination: a chain saw having a cutter bar with a projecting flange adjacent one end there of, and a saw chain peripherally mounted for rotation around said cutter bar in cutting and noncutting runs, the edge of said cutter bar adjacent said noncutting run defining a recess for receiving said latter run therein for preventing a cut and falling tree from stripping the saw chain off the cutter bar and also to prevent said latter run from engaging adjacent objects; a hollow anvil directly pivoted by an end to said cutter bar adjacent its flanged end for scissors action therewith, said hollow anvil having parallel inner edges opposing the cutter bar and an oppositely disposed closed back, said inner edges receiving the cutting run and adjacent edge of the cutter bar for shielding them from a cut and falling tree; driving means mounted on said cutter bar behind the pivot with the anvil to remove it from range of tree damage and for driving the saw chain; reciprocating power means pivotally mounted in said hollow anvil for protection from a cut and falling tree, and pivotally connected with said projecting flange to pivot the chain saw and the anvil in scissors action for engaging and cutting a tree therebetween, whereby both runs of saw chain, the reciprocating power means and the driving means are prevented from becoming casualties of their operating results.
Claim 3
Dependent Claim 58 words
An improved tree cutting apparatus as described in claim 1 wherein the parallel inner edges of said hollow anvil opposing the cutting run of said saw chain are sharpened to bite into a tree engaged for cutting to prevent any movement of the apparatus up the tapered tree trunk to thereby bind the chain saw in its cut.

References Cited (Backward Citations)

US2876816A Cited
SU142106A1 Cited
US3140736A Cited
US3364964A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-02-22 1974-08-24 1975-02-23 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-02-22 1978-08-24 1979-02-23 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-02-22 1982-08-24 1983-02-23 $7700.00 Window Closed / Lapsed

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