Schiller-pfeiffer, Inc.

Mark R Pfeiffer

Michael J MacIntyre

William F Gallagher

A blade assembly for use with a tilling mechanism including a first blade disk. A second blade disk is coaxially mounted to rotate with the first blade disk and is positioned in a spaced apart generally parallel fashion relative to the first blade disk. The first blade disk and the second blade disk are rotatable in a first direction. A first plurality of teeth are disposed on the first blade disk. Each of the first plurality of teeth have a first leading edge which extends generally radially outwardly from the first blade disk. A second plurality of teeth are disposed on the second blade disk. Each of the second plurality of teeth has a second leading edge which extends generally linearly outwardly from the second blade disk in a direction counter to the first direction. The second leading edge forms an obtuse angle as measured relative to a line extending in the first direction tangent to the second blade disk. A second embodiment of the blade assembly is also shown herein.

Teeth arrangement for blade disks

An improved blower for moving debris on a surface is provided. The blower includes a frame mounted on wheels and a motor mounted to the frame. A blower housing with an inlet opening and a discharge chute is also mounted to the frame. A fan is located in the blower housing and is drivingly connected to the motor to generate an air flow having a predetermined volumetric flow. An adjustable height, pivotable deflector is mounted in the discharge chute to split the air flow into upper and lower portions. The deflector is pivotable from a first, downwardly inclined position, to concentrate the lower portion of the air flow along the surface to create a lifting force for lifting and moving the debris while the upper portion of the air flow moves the debris outwardly, to a second position, in which the pivotable deflector is upwardly inclined to create an expanded air flow profile. The deflector height is adjustable to adjust the volumetric flow of the upper and lower portions.

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Warminster, PA, United States of America

Mark R Pfeiffer