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.

Abstract: A debris blower and/or vacuum device is disclosed which comprises a motor unit which drives an impeller. When the device is to be used as a blower, a volute arrangement adopted for blowing in which the impeller is locatable is releasably attached to the motor unit. The blower volute includes an air inlet and an air outlet duct for expelling a stream of air created by the impeller. When the device is to be used as a vacuum, a volute arrangement adapted for vacuuming in which the impeller is locatable is releasably attached to the motor unit. The vacuum volute includes a suction duct for transporting debris to the impeller in an airstream created by the impeller and an air expelling duct for transporting debris away from the impeller in the stream of air to a collecting location.

Abstract: A wireless electronic module includes a folded monopole antenna having an antenna port impedance which is reactive at the RF frequency of operation and which conjugately matches the reactive impedance of the electronic circuit which connects to the antenna port. A grounded shield is interposed between the antenna and the electronic circuit to reduce RF losses at the antenna.

Abstract: A shaft assembly a tool comprises a first shaft part and a second shaft part and is adapted to be arranged between a handle and a working head of the tool. The first shaft part is slideable and/or rotatable within the second shaft part, and a pin is trapped within the first shaft part is adapted to engage with a co-operating receiving device in the second shaft part. A clamp is provided to secure the second shaft part relative to the first shaft part.

Abstract: A blower vacuum device of the kind having a motor (2) which is located in a housing (4) and which drives an impeller (12) located in a the volute (16). The volute (16) has an air inlet (18) and an air outlet (20). When the device is used as a blower a blower attachment (28), formed in a single piece from a blower duct (28) and a grill (22), is releasably attached to the volute so that the grill (22) is attached over the air inlet of the volute and the blower duct (28) is attached over the air outlet. When the device is used as a vacuum, a vacuum attachment (36) which is formed in one piece from a suction duct (30) and a collecting bag duct (34) is releasably attached to the volute so that the suction duct (30) is attached over the air inlet and the collecting bag duct (34) is attached over the air outlet. This means that it is easy to change the device between a blowing mode and a vacuum mode by detaching a single piece blowing attachment from the device and replacing it with a single piece vacuum attachment.