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US 5,701,632 AGranted
Debris blowing apparatus
AssigneeBlack & Decker Inc.
InventorsCraig Webster, John Sadler
Life of this patent
Estimating the term…
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.
Claims6
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.
4 more elements
Dependencies are inferred from the claim text.