초록 ▼

An improved portable electrically powered leaf blower is disclosed that can provide levels of air flow and velocity comparable to those of gasoline-powered blowers, yet that generates substantially reduced noise, eliminates exhaust emissions and emissions from spilled fuel, and is lightweight and co

An improved portable electrically powered leaf blower is disclosed that can provide levels of air flow and velocity comparable to those of gasoline-powered blowers, yet that generates substantially reduced noise, eliminates exhaust emissions and emissions from spilled fuel, and is lightweight and convenient to operate. The leaf blower incorporates a sound-insulated duct that encloses an electric motor and fan assembly, and a handle projects above the duct's inlet end. Electrical power is provided by a battery pack carried in a backpack worn by the operator. Positioning the primary noise sources within a duct that in use is positioned close to the ground minimizes noise levels both at the operator's ears and at a distance.

대표청구항 ▼

[ We claim:] [31.] A blower apparatus, comprising:a duct having an inlet and an outlet;an electric motor located within the duct, between the inlet and the outlet, the motor including a rotatable shaft;a fan coupled to the shaft of the motor and configured to direct air along a flow path through the

[ We claim:] [31.] A blower apparatus, comprising:a duct having an inlet and an outlet;an electric motor located within the duct, between the inlet and the outlet, the motor including a rotatable shaft;a fan coupled to the shaft of the motor and configured to direct air along a flow path through the duct, from the inlet to the outlet;a handle projecting above the inlet of the duct and configured to be gripped by an operator; andan elongated support tube extending coaxially through at least a portion of the duct and configured to carry the motor, the fan, and the handle.