Multi-purpose mowing blade for discharge, bagging, and mulching

• US 5,327,710 A
• Filed: 01/14/1993
• Issued: 07/12/1994
• Est. Priority Date: 01/14/1993
• Status: Expired due to Fees

• Current Assignee: Mtd Products Incorporated (Stanley Black & Decker, Inc.)
• Original Assignee: Mtd Products Incorporated (Stanley Black & Decker, Inc.)
• Inventors: Martens, Daniel, Plamper, Gerhard
• Primary Examiner(s): MELIUS, TERRY L
• Application Number:
  US08/004,287
• Time in Patent Office: 544 Days
• Field of Search: 56/255, 56/295, 56/17.5, 56/DIG. 17, 56/DIG. 20
• US Class Current: 56/255
• CPC Class Codes: A01D 2101/00 Lawn-mowers
• CPC Class Codes: A01D 34/005 Mulching means
• CPC Class Codes: A01D 34/73 Cutting apparatus
• CPC Class Codes: A01D 34/826 Noise reduction means
• CPC Class Codes: Y10S 56/17 Cutter details

Abstract

A mulching blade for a lawn mower including in combination a diagonal flange on the blade tip upwardly extending at a 20°, a neighboring cutout in the back of the blade, and a spaced downwardly extending flange section. These elements cooperate to recirculate the grass clippings in a circular manner through the region of the cutting edge so as to provide for a low inertia improved efficiency multi-purpose blade.

Claims

1. A mower blade for a rotary shaft, said mower blade comprising a mounting section, means to mount said mounting section to the rotating shaft,

a mulching section, said mulching section being located radially outward of said mounting section, said mulching section including a cutting section on the leading edge thereof, said mulching section having a surface behind said cutting section, and said surface of said mulching section being angled downwardly in respect to said leading edge of said mulching section,

an angled tip section, said angled tip section being located radially outward of said mulching section, said angled tip section including a cutting blade along the leading edge thereof, and said angled tip section having a surface, said surface of said angled tip section being angled upwardly in respect to said leading edge of said angled tip section,

said angled tip section having a trailing edge, said trailing edge being located above said cutting section of said mulching section,

said angled tip section including an extreme tip, and said extreme tip being angled upwardly in respect to said surface of said angled tip section at an acute angle in respect to the longitudinal axis of said mower blade.

2. The mower blade of claim 1 characterized in that said cutting section of said angled tip is the lowest portion of said mower blade.

3. The mower blade of claim 1 characterized by the addition of a cutaway section, said cutaway section being located radially outward of said mulching section between said mulching section and said angled tip section, said cutaway section including a cutout on the trailing edge thereof, said cutaway section including a cutting section on the leading edge thereof and said leading edge of said cutaway section being substantially located above said leading edge of said angled tip section.

4. The mower blade of claim 3 characterized in that said trailing edge of said angled tip section is the highest point of said mower blade.

5. The mower blade of claim 3 characterized in that said cutting section of said mulching section is approximately the same height as said cutaway section.

6. A mower blade for a rotary shaft, said mower blade comprising a mounting section, means to mount said mounting section to the rotating shaft,

a mulching section, said mulching section being immediately adjacent to said mounting section radially outward thereof, said mulching section including a cutting section on the leading edge thereof, said mulching section having a flat surface behind said cutting section, said flat surface of said mulching section being angled downwardly in respect to said leading edge of said mulching section,

a cutaway section, said cutaway section being located radially outward of said mulching section, said cutaway section including a cutout in the trailing section of the blade, said cutaway section including a cutting blade along the leading edge of the cutaway section, said cutaway section having a flat surface, and said flat surface of said cutaway section being angled upwardly in respect to said leading edge of said cutaway section,

an angled tip section, said angled tip section being located radially outward of said cutaway section, said angled tip section including a cutting blade along the leading edge thereof, said angled tip section having a flat surface and said flat surface of said angled tip section being angled upwardly in respect to said leading edge of said angled tip section,

said angled tip section including an extreme tip, and said extreme tip being angled upwardly in respect to said surface of said angled tip section at an acute angle in respect to the longitudinal axis of said mower blade.

7. The mower blade of claim 6 characterized in the said mounting section has leading and trailing edges, and said leading and trailing edges having downwardly extending flanges integral thereto.

8. The mower blade of claim 6 characterized in that said cutting section of said angled tip section is the lowest portion of said mower blade.

9. The mower blade of claim 6 characterized in that said cutting section of said mulching section is the highest point of said mower blade.

10. The mower blade of claim 6 characterized in that said cutting section of said mulching section is approximately the same height as said cutaway section.

11. The mower blade of claim 6 characterized in that said mounting section has a leading edge, and said leading edge being formed in a downward flange.

12. The mower blade of claim 6 characterized in that the mower blade is utilized with a mulching mower deck, and said mulching mower deck having a raised curved outer section over the mulching, cutaway, and angled tip sections.

13. The mower blade of claim 6 characterized in that the mower blade is utilized with a bagging mower deck and said bagging mower deck has a substantially flat outer section over the mulching, cutaway, and angled tip sections.

14. A mower blade for a rotary shaft, said mower blade comprising a mounting section, means to mount said mounting section to the rotating shaft,

a mulching section, said mulching section being immediately adjacent to said mounting section radially outward thereof, said mulching section including a cutting section on the leading edge thereof, said mulching section having a flat surface behind said cutting section, said flat surface of said mulching section being angled downwardly in respect to said leading edge of said mulching section,

a cutaway section, said cutaway section being located radially outward of said mulching section, said cutaway section including a cutout in the trailing section of the blade, said cutout having an inboard edge, said cutaway section including a cutting blade along the leading edge of the cutaway section, said cutaway section having a flat surface, and said flat surface of said cutaway section being angled upwardly in respect to said leading edge of said cutaway section, the transition between said downward angling of said mulching section and said upward angling occurring at the inboard edge of said cutout,

an angled tip section, said angled tip section being located radially outward of said cutaway section, said angled tip section including a cutting blade along the leading edge thereof, said angled tip section having a flat surface and said flat surface of said angled tip section being angled upwardly in respect to said leading edge of said angled tip section,

said angled tip section including an extreme tip, and said extreme tip being angled upwardly in respect to said surface of said angled tip section at an acute angle in respect to the longitudinal axis of said mower blade, and a line along said acute angle extending into said cutout.