Lawn Mower Blade

• US 20110277438A1
• Filed: 04/14/2011
• Published: 11/17/2011
• Est. Priority Date: 04/15/2010
• Status: Active Application

• Current Assignee: Anthony P. Perruso Jr
• Original Assignee: Anthony P. Perruso Jr
• Inventors: Perruso, Anthony P. JR.
• Application Number:
  US13/086,727
• Publication Number:
  US 20110277438A1
• Time in Patent Office: Days
• US Class Current: 56/295
• CPC Class Codes: A01D 34/73 Cutting apparatus

Abstract

The present invention is directed towards a rotary lawn mower blade designed to eject grass clippings away from the center of the blade. The rotary lawn mower includes a main body which has two opposing ends. The first end comprises a first leading cutting edge arranged opposite a first trailing edge. The first trailing edge has an upturned portion having sufficient height, length and configuration to redirect air flow generated when the main body is rotating to create pressurized air, thereby creating an increased force to disperse grass to the external environment. The second end comprises a second leading cutting edge arranged opposite a second trailing edge. The second trailing edge has an upturned portion having sufficient height, length and twist configuration to redirect air flow generated when the main body is rotating to create pressurized air, thereby creating an increased force to disperse grass to the external environment.

Claims

1. A rotary lawn mower blade for cutting grass comprising:

a generally elongated rectangular body having an aperture for attachment to a drive shaft of a lawn mower to provide said body rotary movement, said aperture dividing said body into a first end and a second end;

said first end having a first leading cutting edge arranged opposite a first trailing edge, said first trailing edge having an upturned portion having sufficient height, length and configuration to impart energy to the circulating air causing the air to exit out the lawn mower at a greater velocity than when it started;

said second end having a second leading cutting edge arranged opposite a second trailing edge, said second trailing edge having an upturned portion having sufficient height, length and configuration to impart energy to the circulating air causing the air to exit out the lawn mower at a greater velocity than when it started;

2. The rotary lawn mower blade for cutting grass according to claim 1 wherein said body includes at least one notched section adjacent said upturned portion.

3. The rotary lawn mower blade for cutting grass according to claim 2 wherein the length of said first upturned portion and the length of said second upturned portion extend from said notched portions to said distal ends.

4. The rotary lawn mower blade for cutting grass according to claim 3 wherein the length of said first leading cutting edge and the length of said second leading cutting edge extend from said notched portion to said distal ends.

5. The rotary lawn mower blade for cutting grass according to claim 4 wherein the height of said upturned portions closest to said aperture is smaller than the height of said upturned portion furthest from said center aperture.

6. The rotary lawn mower blade for cutting grass according to claim 5 wherein the height of said upturned portions between the portions closest to said aperture and said upturned portion furthest from said aperture is varied.

7. The rotary lawn mower blade for cutting grass according to claim 5 wherein said length of said cutting edge and the length of said upturned portions are substantially similar.

8. The rotary lawn mower blade for cutting grass according to claim 7 wherein the length of each said upturned portion is at least half the length of each end.

9. The rotary lawn mower blade for cutting grass according to claim 7 wherein the length of each said upturned portion is at least three quarters of the length of each end.

10. The rotary lawn mower blade for cutting grass according to claim 7 wherein said upturned portions have an angle which is less than 45 degrees from the vertical axis.

11. The rotary lawn mower blade for cutting grass according to claim 7 wherein said angle is approximately 20 degrees.

12. The rotary lawn mower blade for cutting grass according to claim 11 wherein said upturned portion further includes an inwardly twist toward the center of said blade.

13. The rotary lawn mower blade for cutting grass according to claim 2 wherein said upturned portion forms a 90 degree angle from the longitudinal axis.