ROTARY BLADE FOR MULCHING LAWN MOWER

• US 3,703,071 A
• Filed: 02/17/1972
• Issued: 11/21/1972
• Est. Priority Date: 02/17/1972
• Status: Expired due to Term

• Current Assignee: Charles I. Anderson
• Original Assignee: Charles I. Anderson
• Inventors: Anderson, Charles I.
• Primary Examiner(s): Kinsey, Russell R.
• Application Number:
  US05/227,194
• Time in Patent Office: 278 Days
• Field of Search: 56/295,255,503,16.4,13.8
• US Class Current: 56/295
• CPC Class Codes: A01D 34/73 Cutting apparatus

Abstract

Rotary blade for a power-driven lawn mower comprising an elongate body terminating at each end in a plurality of integral cutting fingers parallel to and displaced successively below and above the plane of the body with each finger defining a different plane and the upper surfaces of the leading edges of the fingers and the lower surfaces of their trailing edges chamfered to form cutting edges, whereby top-to-bottom reversal of the blade presents as leading cutting edges those that were trailing edges.

Claims

1. A rotary blade for a power-driven lawn mower having a vertically depending drive shaft, comprising an elongate main body having a centrally disposed socket drivingly engaging said shaft, said body terminating at each end in a plurality of cutting fingers parallel to and displaced successively below and above the plane of said body with each finger defining a different plane, the upper surface of the leading edge and the lower surface of the trailing edge of each of said fingers being chamfered to form a cutting edge, whereby top-to-bottom reversal of said blade presents as leadiNg cutting edges those that were trailing edges.

2. A rotary blade according to claim 1, wherein the total of the widths of said fingers at each end of said body substantially equals the width of said body.

3. A rotary blade according to claim 1, wherein said fingers are integral extensions of said body.