# US 9,517,571 B2 · Circular cutting blade

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- Number: US 9,517,571 B2
- Document ID: US9517571B2
- Status: Granted
- Kind: B2
- Application number: 12/930,006
- Filed: 2010-12-23
- Published: 2011-07-28
- Granted: 2016-12-13
- Earliest claimed: 2010-01-26
- Assignees: Hyde Tools, Inc.
- Applicants: Eric C. Wilhelm; Richard M. Clemence; William Hill; Richard N. Cloutier
- Inventors: Eric C. Wilhelm; Richard M. Clemence; William Hill; Richard N. Cloutier
- Web page: https://patentgrep.com/patent/US9517571B2

## CPC

- B26D 1/0006: {Cutting members therefor}
- B26D 1/14: with a circular cutting member, e.g. disc cutter
- B26D 2001/0046: {rotating continuously about an axis perpendicular to the edge}
- B26D 2001/0053: {having a special cutting edge section or blade section}
- B26D 2001/006: {the cutting blade having a special shape, e.g. a special outline, serrations}
- Y10T 83/9403: Disc type
- B26D: CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING (for growing crops or plants A01D, A01G; for fodder or straw A01F; for bulk butter A01J; for dough A21C; slaughtering A22B; for tobacco, cigars or cigarettes A24; marking-out, perforating or making buttonholes A41H25/00; manufacturing footwear A43D; brushmaking A46D; surgery A61B; disintegrating, mincing or shredding in general B02C; cutting wire, making pins or nails B21F, B21G; of the kind used formetal B23; cutting by abrasive fluid jets B24C5/02; hand-held cutting tools B26B; perforating, cutting-out, stamping-out or punching, or severing by means other than cutting B26F; for wood B27; for stone B28D; working of plastics or substances in a plastic state B29; making boxes, cartons, envelopes or bags, of paper or similarly worked materials, e.g. metal foil, B31B; article or web delivery apparatus incorporating cutting or line-perforating devices B65H35/00; for leather or upholstery B68, C14B; for glass C03B; making matches C06F; for peat C10F; for sugar C13B45/00; for textile materials D06H; civil engineering, building, mining, see Section E; for light guides G02B6/25; cutting processed photographic material G03D15/04)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A circular cutting blade is configured for cutting meat when turned about a rotation axis in a predetermined cutting direction. The cutting blade has a peripheral blade edge defined between the first and second sides and a plurality of circumferentially disposed cutting knives. Each cutting knife includes first and second knife sides and an arcuate knife edge that constitutes a portion of the peripheral blade edge. Each knife edge rises, relative to the rotation axis, between a first blade-edge location corresponding to a minor blade radius and a second blade-edge location corresponding to a major blade radius and further includes beveled primary and secondary knife-edge portions along which the first and second knife sides mutually converge at, respectively, a first bevel angle and a second bevel angle less acute than the first bevel angle.

## Claims

### Claim 1

A circular blade configured for cutting meat when turned about a rotation axis in a predetermined cutting direction, the cutting blade comprising:
a peripheral blade edge; and
a plurality of circumferentially disposed cutting knives, each of which cutting knives includes (i) first and second knife sides, (ii) an arcuate knife edge that constitutes a portion of the peripheral blade edge and rises, relative to the rotation axis, between a first blade-edge location corresponding to a minor blade radius and a second blade-edge location corresponding to a major blade radius, and (iii) beveled primary and secondary knife-edge portions along which the first and second knife sides mutually converge at, respectively, a first bevel angle and a second bevel angle less acute than the first bevel angle, wherein
(a) each knife edge is tilted such that an arc-bisecting line that bisects the knife edge at an arc mid-point, and that is oriented orthogonally to a tangent line including the arc mid-point, is non-parallel to a blade-radius line extending from the rotation axis through the arc mid-point;
(b) the secondary knife-edge portion of each cutting knife is situated, relative to the cutting direction, behind the primary knife-edge portion of the same cutting knife such that, when the circular blade is rotating and cutting a work piece, the work piece first encounters the primary knife-edge portion of each cutting knife before encountering the secondary knife-edge portion of that cutting knife;
(c) the secondary knife-edge portion of each cutting knife has a shorter cutting length than the primary knife-edge portion of the same cutting knife;
(d) the peripheral blade edge further comprises a plurality of back slopes, each back slope is situated, relative to the cutting direction, behind the secondary knife-edge portion of a first cutting knife and in front of the primary knife-edge portion of a second cutting knife located behind, and adjacent to, the first cutting knife; and
(e) each back slope slopes more steeply than the knife edges between which that back slope is situated.

### Claim 2 (depends on 1)

The circular cutting blade of claim 1 wherein each back slope is non-beveled.

### Claim 3 (depends on 2)

The circular cutting blade of claim 2 wherein the first and second knife sides of each cutting knife mutually converge to define a double bevel.

### Claim 4 (depends on 1)

The circular cutting blade of claim 1 wherein the first and second knife sides of each cutting knife mutually converge to define a double bevel.