Hinged edger housing having improved internal debris guard and labyrinth perimeter seal

  • US 20030070820A1
  • Filed: 10/16/2001
  • Published: 04/17/2003
  • Est. Priority Date: 10/16/2001
  • Status: Active Grant
First Claim
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1. A power edger comprising a power source for providing a rotational output, a blade device coupled to the power source and rotating about a rotary axis in a rotational direction in response to the rotational output of the power source, and a housing assembly configured to shroud the blade device, the housing assembly including a housing and a door, the housing being coupled to the power source and having a wall member, a first labyrinth member, and a guard, the wall member defining a blade cavity in which the blade device is rotatably mounted, the guard being coupled to the wall member and having a confronting portion that at least partially surrounds the blade device as it rotates in the blade cavity, the confronting portion being defined by a radius that increases smoothly in the rotational direction from a first radius at a leading end of the confronting portion to a second, larger radius at a trailing end of the confronting portion, the first labyrinth member being coupled to the wall member and being disposed radially outwardly from the guard such that it extends around at least a portion of the blade cavity, the door being mounted to the housing and movable between an open position, which substantially clears the blade cavity, and a closed position, which closes a portion of the blade cavity, the door having a second labyrinth member that is configured to engage the first labyrinth member to form a labyrinth seal when the door is placed in the closed position.

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