Husqvarna Ab

Aktiebolaget Electrolux

Husqvarna Aktiebolag

Göran Dahlberg

Gustaf Döragrip

Lars Andersson

Marcus Kragner

Bo I Jonsson

Peter Gunnarsson

Esbjörn Ollas

Anna Sjögren

Hans Ström

Bo P Carlsson

Tore Aronsson

Thomas Engman

Kenth Gustavsson

Carl-Johan Arnesson

Mats Gustavsson

The present invention is related to a retarding device for a hand held cutting machine having a housing () and a drive engine, which drives a transmission including a number of transmission members () and driving a rotational or semi rotational cutting tool. The retarding device includes brake means () arranged to be in close relation with the transmission and for actuating a retarding force on a transmission member (), the brake means being arranged to automatically put a retarding force on said transmission member when the speed of rotation or the torque of rotation of said transmission member falls below a predetermined value.

Retarding device for a handheld cutting machine

The present invention relates to a carburetor of an internal combustion engine having a manually activated start position. The carburetor includes at least a choke valve and a throttle valve both located in the carburetor's main air passage which are able to move between an open and a closed position, each valve having at least one respective lever that cooperates during the manual activation to give at least one start position of the choke and throttle valves. The carburetor further usually includes at least one thermally responsive member arranged to affect the start position. Further a handle is arranged to provide a two stage draw&#x2014;lift motion to attain the start position.

Carburetor start-stop mechanism

A crankcase scavenged two-stroke internal combustion engine () in which a piston ported air passage is arranged between an air inlet () and the upper part of a number of transfer ducts ('). The air inlet is equipped with a restriction valve (), controlled by at least one engine parameter, for instance the carburetor throttle control. The air inlet extends via at least one connecting duct (&#x2032;) to at least one connecting port (&#x2032;) in the engine's cylinder wall (). The connecting port (&#x2032;) is arranged so that when the piston is in a top dead center configuration, it is connected with flow paths (&#x2032;) embodied in the piston (). The flow paths (&#x2032;) extend to the upper part of a number of transfer ducts (&#x2032;), and the flow paths in the piston are arranged so that the recess (&#x2032;) in the piston that meets the respective transfer duct's port (&#x2032;) in a manner that the air supply is given an essentially equally long period, counted as crank angle or time, in relation to the fuel and air mixture inlet period.

Two-stroke internal combustion engine

This invention relates to a device for a pole saw for pruning trees or bushes. The pole saw comprises an elongated stiff tube extending from a drive unit to a remote chain saw head () and incorporates a drive shaft () connected to an input shaft () of a gear () arranged in the chain saw head (). The gear is provided with an output shaft () on which a sprocket wheel () for driving a saw chain is arranged. A mass body vibration damper () is arranged between the gear () and the sprocket wheel ().

Device for a pole saw

Leaf blower that is carried on the back of the operator comprising at least an engine () and a fan. The fan is provided with an air inlet () placed on the side of the fan that is facing away from the back of the operator. The air stream is passing the engine () on its way to the air inlet () so that the engine () is cooled.

Leaf blower

Conventional leaf blowers have a supporting frame to where the different components are attached. In order to reduce the noise from the tool and protect some of the components are they provided with covers. This makes the tool heavy and complicated for the operator to use. The claimed invention is a covering casing () that also is the supporting structure for the different components in the tool. The casing reduces the amount of noise spread from the tool and protects the components inside the casing ().

Casing for leaf blower

Crankcase scavenged two-stroke internal combustion engine (), in which a piston ported air passage is arranged between an air inlet () and the upper part of a number of transfer ducts ('). The air inlet is equipped with a restriction valve (), controlled by at least one engine parameter, for instance the carburettor throttle control. The air inlet extends via at least one connecting duct (&#x2032;) to at least one connecting port (&#x2032;) in the engine's cylinder wall (). The connecting port (&#x2032;) is arranged so that it in connection with piston positions at the top dead center is connected with flow paths (&#x2032;) embodied in the piston (), which extend to the upper part of a number of transfer ducts (&#x2032;), and the flow paths in the piston are so arranged that the recess (&#x2032;) in the piston that meets the respective transfer duct's port (&#x2032;) is so arranged that the air supply is given an essentially equally long or longer period, counted as crank angle or time, in relation to the fuel and air mixture inlet period.

Growing community of inventors

Gränna, Sweden

Göran Dahlberg