Husqvarna Ab

Aktiebolaget Electrolux

Volvo Car Corporation

Ab Volvo

Husqvarna Aktiebolag

Lars Andersson

Göran Dahlberg

Bo I Jonsson

Hans Ström

Ove Donnerdal

Jonas Forssell

Bo P Carlsson

Par B Martinsson

Mikael Larsson

Tore Aronsson

Christer Odenmarck

Per O Viktorsson

Thomas Engman

Chun-Chin Chen

Mikael Bergman

Bert K Karlsson

Sven A Andersson

Vinko Hanzek

Annica Gabrielsson

Mathias Jörgensson

Fredrik Johansson

Carl-Gustaf Pehrsson

Cheng-Tsung Yang

Mathias Joergensson

Jan Andersson

A gerotor pump including a housing which includes a first supply socket and a second supply socket, an inner rotor, and an outer rotor rotatably located relative the housing. The inner rotor is located within the outer rotor, lobes of the inner and the outer rotors are engaged, and the inner rotor is centered around a rotational axis which is eccentric from an axis of rotation of the outer rotor. A pressure chamber with a high pressure and a low pressure section is defined between the inner and outer rotors. The inner rotor is rotatably arranged on a shaft cylinder which is fixed at one end of a central drive shaft of the pump and is centered about the rotational axis, whereby the inner rotor wanders in the outer rotor when the central drive shaft is turned. The inner rotor is provided with radial supply conduits extending from the pressure chambers to the shaft cylinder. The shaft cylinder is provided with at least a first and a second cylinder opening, such that the first cylinder opening is axially displaced relative the second cylinder opening, and the first opening is arranged such that it is connected to the high pressure section, and the second cylinder opening is arranged such that it is connected to the low pressure section.

Gerotor pump, a gerotor motor and a gerotor transmission system

A power cutter including a tool unit, an internal combustion engine having an engine cylinder with cylinder bore having a center line and an exhaust port formed in the engine cylinder, a crankshaft, crankcase and an assembly for supplying air and fuel to the engine, and a muffler accommodated in a close and side by side relationship with the engine cylinder, the muffler includes an exhaust gas inlet and an exhaust gas outlet, such that the exhaust gas inlet is adapted to receive the exhaust gases from an exhaust port of the engine cylinder, wherein the exhaust gas inlet is provided on the top or bottom or local side of the muffler.

Power cutter

A chainsaw having a brake arrangement comprising: a kickback brake drum () arranged to rotate together with a drive sprocket driving a saw chain of a chainsaw, a kickback brake for quickly stopping the saw chain if at least one kickback actuator () is actuated, the kick back brake including a kickback brake band () extending around the kickback brake drum () and means for tightening the kickback brake band (-) around the kickback brake drum (), and; a coasting brake weaker than the kickback brake being arranged to brake the saw chain () unless a coasting actuator of the chainsaw is actuated, the coasting brake includes a coasting brake band extending around a coasting brake drum () arranged to rotate together with the drive sprocket (), and means for tightening the coasting brake band () around the coasting brake drum, wherein the coasting brake band is either at least one longitudinally slit portion () of the kickback brake band or a separate brake band.

Coasting brake arrangement for a power tool

A handle portion for a hand-held motor-driven tool and a hand-held motor-driven tool including a base portion (), a rear handle () arranged to the rear part () of the base portion () and a front handle () having a first end () attached to the base portion () and a second end () attached to the base portion (). At least a part of the front handle () is arranged as a loop starting from a first lateral face () extending in a direction away from a lower face () of the base portion () and further in a direction towards a second lateral face (). A first attachment means () for attaching the first end () and a second attachment () means for attaching the second end are mountable at the same face of the first lateral face (), second lateral face () or lower face () of the base portion.

Handle portion of a hand-held motor-driven tool

An overdrive unit for a vehicle is operatively connectable to a transverse mounted front wheel drive vehicle gearbox, which has been arranged to provide a single output shaft. The overdrive unit includes a planetary gear set and a differential are mounted together in an overdrive unit housing such that the output shaft of the vehicle gearbox is operatively connectable to the planetary gear set. The planetary gear set is further operatively connectable to drive shafts of the vehicle via the differential. A clutch unit is provided for selectively engaging gearing of the planetary gear set.

Overdrive unit

A lubrication system for a four stroke engine including an oil pan for storing lubrication oil; a crankcase, wherein a crankshaft is disposed, which crankshaft has a balance weight and is coupled with a piston of a cylinder; a gear assembly room; a rocker-arm chamber; and a gas-oil separator for separating gas and oil from a mix of gas and oil; wherein the oil pan communicates with the crankcase by an oil suction passage, in which a first check valve is disposed; the crankcase communicates with the gear assembly room by a first oil delivery passage; the gear assembly room communicates with the rocker-arm chamber by a second oil delivery passage, and the gear assembly room communicates with the oil pan by a third oil delivery passage; the rocker-arm chamber communicates with the crankcase by a first oil return passage having a second check valve therein.

Lubrication system for a four-stroke engine

A method for controlling an ignition system of an internal combustion engine having a primary firing pulse generator for charging a capacitor. An electronic switch is included for discharging the capacitor via an ignition coil to generate an ignition voltage. A microcomputer operates the switch to control the ignition timing of the generator. The microcomputer is in communication with a speed sensor that detects the rotational speed of the engine and a speed limitation control that limits the engine speed to a limitation speed below the clutch-in speed of an included centrifugal clutch. The speed limitation control is active or activated when one of either starting the engine or an operating problem of the power tool is detected. The speed limitation control is deactivated when a low speed state of the engine is detected.

Start safety ignition system

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

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.

Crankcase scavenged internal combustion engine of two-stroke type ( ) having at least one cylinder ( ) and at least one air passage arranged between an air inlet ( ) and the upper part of a number of scavenging ducts ( &prime;) with exhaust orientated scavenging ports ( &prime;) located close to the exhaust port ( ) of the cylinder. At least one intake orientated scavenging port ( &prime;) is located close to the inlet port ( ) of the cylinder and is fed by at least one scavenging duct ( &prime;), and the air passage and the scavenging ducts are so arranged that the scavenging ducts ( &prime;) can be supplied with and hold so much air that they during the following scavenging process will scavenge essentially nothing but air. The air passage is arranged from an air inlet ( ) provided with a restriction valve ( ) controlled by at least one engine parameter such as the carburetor throttle control. The intake orientated scavenging port/s ( &prime;) is/are so arranged that it/they begin/s to scavenge the air and fuel-mixture ( ) later than the scavenging ports ( &prime;) begin to scavenge air.

Motor saw

The invention relates to a motor vehicle gearbox with two concentrically mounted input shafts (6,9), each driving an individual countershaft (12,15). The countershafts have gear wheels (16,18,17,19,41) in engagement with gear wheels (21,22,40) on an output shaft. The shafts are arranged in a V-configuration and one countershaft has a disengageable gear wheel (23) in engagement with a gear wheel (11) on the second countershaft to reverse the rotational direction of the latter for driving in reverse. One countershaft (12) has a central synchronizing device (30), by means of which the countershaft, which is drivingly coupled to the temporarily non-driven input shaft, can be accelerated up to a rotational speed determined by the gear speed selected.

Growing community of inventors

Vastra Frolunda, Sweden

Lars Andersson