About 29 results
https://drivepatents.com/patents/1393699 · 31 Dec 2025
Provided is an easy engine starting system including: an engine; a centrifugal clutch configured to transmit a driving force of the engine to a driven device; and a control device configured to adjust output of the engine. When the engine is to be started,...
https://drivepatents.com/patents/1395302 · 29 Oct 2025
A fuel pressurization device pressure-feeds starting fuel supplied from a pump to an engine via a valve. The fuel pressurization device includes: a fuel chamber forming portion including a fuel chamber to which the fuel is supplied from the pump and whose ...
https://drivepatents.com/patents/937784 · 14 Sep 2016
Provided is a portable power working machine that is designed to suppress mixing of dust into air sucked into an air intake system of an air-cooled internal combustion engine mounted as a driving power source for working units, for example, and reliably pr...
https://drivepatents.com/patents/944283 · 20 Apr 2016
An engine-driven working machine is provided, in which a time period until the rotation speed limitation mode is canceled can be shortened. After the throttle valve (10) is moved to a fully-closed position by an operator's operation to allow the engine (2)...
https://drivepatents.com/patents/947750 · 16 Dec 2015
The invention relates to a method for controlling the speed limitation of an internal combustion engine (8) in a hand-held work device (1), such as a motor chainsaw. A cylinder (9) of the internal combustion engine (8) has a combustion chamber (22) bounded...
https://drivepatents.com/patents/950843 · 20 May 2015
A handheld work tool has a fuel supply system and a pump for delivering fuel from the fuel supply system. The pump (40) has an elastic pump bellows (13) to be actuated by the operator. The pump bellows (13) has a fastening section (56) at which the pump be...
https://drivepatents.com/patents/951866 · 18 Mar 2015
The invention relates to a method for starting an internal combustion engine (14) with a pull-cord starter, wherein a fuel/air mixture is supplied to the internal combustion engine (14) via an intake channel (20). An electric fuel valve (30) is arranged in...
https://drivepatents.com/patents/973206 · 25 Jun 2014
The carburetor (36) has a carburetor housing (40), in which a carburetor roller (37) is pivot-mounted around a rotational axis (76). A needle (48) is fixed on the carburetor roller, where the needle is protruded in a fuel opening (90) of the carburetor. Th...
https://drivepatents.com/patents/973509 · 18 Jun 2014
The tool i.e. brush cutter, has an intermediate stopper acting between a zero position and a maximum position, where a position of the stopper is adjustable over an adjustment element (17). A control element is operated when the intermediate stopper reache...
https://drivepatents.com/patents/978794 · 5 Feb 2014
The method involves driving a work tool by a crankshaft engine through a clutch configured to engage in dependence upon the rotational speed of the combustion engine. The clutch is configured to generate a drive connection with the crankshaft. A spark plug...