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Low speed rotary mower

  • US 4,149,358 A
  • Filed: 03/10/1977
  • Issued: 04/17/1979
  • Est. Priority Date: 08/02/1974
  • Status: Expired due to Term
First Claim
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1. Rotary mowing and bagging apparatus, comprising, in combination:

  • (a) a cutting blade mounted for rotation about a substantially vertical axis, said blade having a pair of cutting tips at opposite ends thereof, with each tip having a body including a leading cutting edge and a trailing sail portion having a front surface thereon, each of said front surfaces being substantially inwardly raked at an angle substantially in the range of ten degrees (10°

    ) to sixty degrees (60°

    ) with respect to the blade center line measured in the plane of rotation, said front surfaces being substantially upwardly raked at an upward rake angle substantially in the range of fifteen degrees (15°

    ) to fifty degrees (50°

    ), said upward rake angle being defined as the angle between said front surface and a line perpendicular to the body of said tips;

    (b) a mower housing in which said blade is mounted, having an expansion portion with an expansion top wall with a substantial rise therein leading to a discharge opening, said housing also having a continuous exterior side wall surrounding said blade at the height thereof and extending above said cutting portions;

    (c) means for rotatably driving said blade at a predetermined tip speed below 14,000 FPM, yet sufficient to cause the cutting edges of said blade to cleanly cut blades of grass, clear cut grass particles from the edges, and to impart sufficient momentum to the cut grass particles to allow collection thereof;

    (d) front and rear wheels mounted on said housing to enable movement of said mower over a ground surface at a controlled height thereabove; and

    (e) a grass-catching bag attached to said housing at said discharge opening.

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