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EP0337428A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Cutting blade for a mowing apparatus

Assignee: Komatsu Zenoah Co
•
Filing: 1989-04-12
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Granted: —
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Expires: 2009-04-12
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Abstract

Abstract Disclosed herein is a cutting blade (100) for a mowing ap­paratus, which comprises a pair of first and second pivotal cutting wheels (100U, 100L) slidably superposed with each other and each provided with a number of grass cutting ed­ges (11a, 11b) along its circumference, each of the cutting teeth (CT) having a major surface (10), two side edges (11a, 11b) and an ou­ter periphery edge (12); and mechanism (EN, HP, BL) for re­ciprocatingly rotating each cutting wheel (100U, 100L) in opposite di­rections through a predetermined angle, respectively. At least one of the side edges (11a, 11b) of each of the cutting teeth (CT) of the cutting wheels (100U, 100L) is defined by an inclined surface forming an acute angle relative to a major surface (10) of the cutting tooth (CT) so as to form a cutting edge, and the outer peri­phery edge (12) is defined by a plane substantially perpendicu­lar to the major surface (10) of the cutting tooth (CT). Namely, there is no sharp edge in the outer peripheries of the teeth of the cutting wheels (100U, 100L) or the free ends of the cutting teeth (CT).

Inventors

  • 👤 Akio Terai
  • 👤 Minoru Wada

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-02 19:44
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/63; A01D34/73; A01D34/404

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 127 words
A cutting blade for a mowing apparatus, comprising a pair of first and second pivotal cutting wheels slidably superposed with each other and each provided with a number of cutting teeth along its circumference, each of the teeth having a major surface, two side edges and an outer periphery edge; and means for reciprocatingly rotating each cutting wheel in opposite directions through a predetermined angle, respectively, wherein at least one of the side edges of each of the teeth of the cutting wheels is defined by an inclined surface forming an acute angle relative to the major surface of the tooth so as to form a cutting edge, and the outer periphery edge is defined by a plane substantially perpendicular to the major surface of the tooth.
Claim 2
Dependent Claim 127 words
A cutting blade for a mowing apparatus, comprising a pair of first and second pivotal cutting wheels slidably superposed with each other and each provided with a number of cutting teeth along its circumference, each of the teeth having a major surface, two side edges and an outer periphery edge; and means for reciprocatingly rotating each cutting wheel in opposite directions through a predetermined angle, respectively, wherein at least one of the side edges of each of the teeth of the cutting wheels is defined by an inclined surface forming an acute angle relative to the major surface of the tooth so as to form a cutting edge, and the outer periphery edge is defined by a plane substantially perpendicular to the major surface of the tooth.
Claim 3
Dependent Claim 32 words
A cutting blade for a mowing apparatus as claimed in claim 1, wherein both side edges of each of the teeth of the cutting wheels are defined by an inclined surface, respectively.
Claim 4
Dependent Claim 93 words
A cutting blade for a mowing apparatus as claimed in claim 1, wherein the cutting teeth of each of the cutting wheels are slightly bent toward the opposite cutting wheel in such a manner that only the tip portions of said cutting teeth of each cutting wheel are elastically contacted with each other when the cutting wheels are correctly superposed such that contacting portions between the cutting teeth of the first and second cutting wheels are displaceable along the profile of each cutting edge according to the rotational motion of the cutting wheels.

References Cited (Backward Citations)

US3631658A Cited
DE3248679A1 Cited
EP0257566A1 Cited

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