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US 7,070,132 B1Granted
Low-speed high-torque chipper-shredder machine
AssigneeIowa State University Research Foundation, Inc.
InventorMax P. Gassman
Life of this patent
Estimating the term…
Abstract
A yard waste chipper-shredder machine includes a reversible electric motor to drive a roller at low speed and high torque. The waste material is fed into an inlet chute and is crushed and ground into mulch between the roller and the chute for discharge through an outlet chute. The chute is spring biased to reduce jams. The machine operates quietly. Jams are quickly and easily removed by reversing the motor.
Claims23
A chipper-shredder machine for yard waste, comprising:
- a motor;
- a roller operatively driven by the motor;
- an inlet chute to feed yard waste to the roller so as to grind the yard waste into mulch;
- and
- an outlet chute to receive the mulch from the roller, the outlet chute being spring loaded.
2 more elements
A yard material mulching machine comprising:
- a feed chute with opposite inlet and outlet ends, and along which the yard material flows;
- the outlet end being spring loaded so as to reduce jams in the roller;
- a roller adjacent the feed chute;
- and
- a motor for rotating the roller such that the yard material is crushed between the roller and the feed chute and thereby reduced into mulch.
2 more elements
A method of reducing yard waste material into mulch, comprising:
- feeding the yard waste material into an inlet chute;
- crushing and grinding the yard waste material with a rotating roller;
- and
- discharging the crushed yard waste material onto a spring loaded outlet chute that receives the crushed yard waste material from the rotating roller and that is biased toward the roller in order to inhibit jams in the roller.
1 more element
Dependencies are inferred from the claim text.