Debris blowing apparatus
First Claim
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1. A debris blowing apparatus comprising:
- a motor;
a fan driven by the motor;
an air inlet to the fan;
an air outlet from the fan;
a metering aperture through which air expelled from the outlet can be recirculated into the air inlet;
an aperture cover for selectively covering the metering aperture;
and a blower duct a first end of which communicates with the air outlet so that air which is not recirculated into the inlet travels along the blower duct and exits from a second working end of the duct.
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Abstract
A debris blowing apparatus with a motor, a fan driven by the motor, an inlet to the fan and an air outlet from the fan. A portion of the air which is emitted through the outlet is recycled through a metering aperture into the air inlet to maintain a constant load on fan whilst varying the air output.
22 Citations
6 Claims
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1. A debris blowing apparatus comprising:
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a motor; a fan driven by the motor; an air inlet to the fan; an air outlet from the fan; a metering aperture through which air expelled from the outlet can be recirculated into the air inlet; an aperture cover for selectively covering the metering aperture; and a blower duct a first end of which communicates with the air outlet so that air which is not recirculated into the inlet travels along the blower duct and exits from a second working end of the duct. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification