Cutter teeth assembly

• US 5,085,113 A
• Filed: 01/03/1991
• Issued: 02/04/1992
• Est. Priority Date: 11/12/1986
• Status: Expired due to Term

• Current Assignee: Pinney J. Dana
• Original Assignee: Pinney J. Dana
• Inventors: Pinney, J. Dana
• Primary Examiner(s): Yost, Frank T.
• Assistant Examiner(s): Jones, Eugenia A.
• Application Number:
  US07/637,594
• Time in Patent Office: 397 Days
• Field of Search: 83/835, 83/837, 83/839, 83/840, 83/841, 83/844, 83/846, 83/848, 83/833, 83/834
• US Class Current: 83/840
• CPC Class Codes: B23D 61/06 in exchangeable arrangement
• CPC Class Codes: B27B 33/141 with means to control the depth of cut
• CPC Class Codes: Y10T 83/925 Having noncutting depth gauge
• CPC Class Codes: Y10T 83/9331 By independent connecting element
• CPC Class Codes: Y10T 83/9341 Rectilinearly movable
• CPC Class Codes: Y10T 83/935 Plural tooth groups

Abstract

Circular brush cutting blade for powered brush cutter has cutting teeth arranged in pairs on periphery of blade, the teeth in pairs being of alternate right and left configuration and closely spaced together, the pairs of teeth being relatively widely spaced apart on the blade. Means are provided to engage the kerf sides and deflect the blade toward its central plane as it engages the material being cut.

Claims

1. A cutter teeth assembly comprising:

(a) a plurality of cutter teeth of alternating left and right configuration;

(b) a member interconnecting said teeth to enable them to be moved in a predetermined forward direction;

(c) each of said teeth comprising a flat, planar base portion having opposite, parallel side surfaces, a sidewall kerf cutting portion integral with said base portion extending upwardly therefrom and having an offset to one side of said base portion, and a kerf bottom cutting portion extending from said sidewall kerf cutting portion transversely across the plane of said base portion, said sidewall kerf cutting portion and said kerf bottom cutting portion each having a respective forward edge formed with a beveled surface defining a cutting edge adapted to cut a kerf in a workpiece of greater width than the width of said base portion between said side surfaces;

(d) a depth gauge element positioned forwardly of said cutting edge, said depth gauge element having an upwardly-extending sidewall portion and having a top plate extending substantially at a right angle to said sidewall portion transversely across the plane of said base portion a distance greater than said width of said base portion, said top plate having a forwardly-facing transverse leading edge and a rearwardly-facing transverse trailing edge and defining an upwardly-facing planing surface sloping upwardly from said transverse leading edge to said transverse trailing edge toward said cutting edge, said transverse trailing edge of said top plate and said forward edge of said kerf bottom cutting portion being located at different respective heights above said base portion; and

(e) means mounting said depth gauge element for maintaining said transverse trailing edge of said top plate at a height below that of said forward edge of said kerf bottom cutting portion regardless of whether or not said cutter teeth are cutting said work-piece.

2. The assembly of claim 1 wherein said depth gauge element is integral with said base portion and is defined by an upward extension of said base portion.

3. The assembly of claim 1 wherein said member interconnecting said teeth has an upper extremity extending upwardly at least as high as said transverse leading edge of said top plate.

4. The assembly of claim 1 wherein said sidewall portion of said depth gauge element is canted out of the plane of said base portion sloping transversely rearwardly toward said offset of said sidewall kerf cutting portion.

5. The assembly of claim 1 wherein said member interconnecting said teeth is a circular disk having a periphery to which said teeth are attached.

6. A cutter teeth assembly comprising:

(a) a plurality of cutter teeth of alternating left and right configuration;

(b) a member interconnecting said teeth to enable them to be moved in a predetermined forward direction;

(c) each of said teeth comprising a flat, planar base portion having opposite, parallel side surfaces, a sidewall kerf cutting portion integral with said base portion extending upwardly therefrom and having an offset to one side of said base portion, and a kerf bottom cutting portion extending from said sidewall kerf cutting portion transversely across the plane of said base portion, said sidewall kerf cutting portion and said kerf bottom cutting portion each having a respective forward edge formed with a beveled surface defining a cutting edge adapted to cut a kerf in a workpiece of greater width than the width of said base portion between said side surfaces;

(d) a depth gauge element positioned forwardly of said cutting edge, said depth gauge element having an upwardly-extending sidewall portion and having a top plate extending substantially at a right angle to said sidewall portion transversely across the plane of said base portion a distance greater than said width of said base portion, said top plate having a forwardly-facing transverse leading edge and a rearwardly-facing transverse trailing edge and defining an upwardly-facing planing surface sloping upwardly from said transverse leading edge to said transverse trailing edge toward said cutting edge;

(e) said member interconnecting said teeth having an upper extremity extending upwardly at least as high as said transverse leading edge of said top plate.

7. The assembly of claim 6 wherein said depth gauge element is integral with said base portion and is defined by an upward extension of said base portion.

8. The assembly of claim 6 wherein said sidewall portion of said depth gauge element is canted out of the plane of said base portion sloping transversely rearwardly toward said offset of said sidewall kerf cutting portion.

9. The assembly of claim 6 wherein said member interconnecting said teeth is a circular disk having a periphery to which said teeth are attached.

10. A cutter teeth assembly comprising:

(a) a plurality of cutter teeth of alternating left and right configuration;

(b) a member interconnecting said teeth to enable them to be moved in a predetermined forward direction;

(c) each of said teeth comprising a flat, planar base portion having opposite, parallel side surfaces, a sidewall kerf cutting portion integral with said base portion extending upwardly therefrom and having an offset to one side of said base portion, and a kerf bottom cutting portion extending from said sidewall kerf cutting portion transversely across the plane of said base portion, said sidewall kerf cutting portion and said kerf bottom cutting portion each having a respective forward edge formed with a beveled surface defining a cutting edge adapted to cut a kerf in a workpiece of greater width than the width of said base portion between said side surfaces;

(d) a depth gauge element positioned forwardly of said cutting edge, said depth gauge element having an upwardly-extending sidewall portion and having a top plate extending, from a juncture with said sidewall portion, substantially at a right angle to said sidewall portion transversely across the plane of said base portion a distance greater than said width of said base portion, said top plate having a forwardly-facing transverse leading edge and a rearwardly-facing transverse trailing edge and defining an upwardly-facing first planing surface sloping upwardly from said transverse leading edge to said transverse trailing edge toward said cutting edge;

(e) said sidewall portion of said depth gauge element being canted out of the plane of said base portion sloping transversely rearwardly toward said offset of said sidewall kerf cutting portion, said sidewall portion of said depth gauge element being bent at a first location below said juncture toward said offset of said sidewall kerf cutting portion, and being bent oppositely at a second location above said first location and below said juncture, so as to define a side-facing second planing surface between said second location and said juncture sloping transversely rearwardly toward said offset of said sidewall kerf cutting portion.

11. The assembly of claim 10 wherein said sidewall portion of said depth gauge element is integral with said base portion and is defined by an upward extension of said base portion.

12. The assembly of claim 10 wherein said member interconnecting said teeth has an upper extremity extending upwardly at least as high as said transverse leading edge of said top plate.

13. The assembly of claim 10 wherein said member interconnecting said teeth is a circular disk having a periphery to which said teeth are attached.