| Patent Number |
Title Of Patent |
Date Issued |
| D377441 |
Motor-driven chain saw |
January 21, 1997 |
|
| D364326 |
Chain saw |
November 21, 1995 |
|
| D341450 |
High-pressure cleaning apparatus and housing therefor |
November 16, 1993 |
|
| 5896669 |
Cutterhead for an overhead branch cutter |
April 27, 1999 |
| The invention is directed to a cutterhead for an overhead branch cutter. The cutterhead includes a work tool and a gear assembly housing having a lower housing part and an upper housing part defining a closure cover for the lower housing part. A gear assembly is mounted in the housing an |
| 5890292 |
Portable hand-guided work apparatus having a tool guard |
April 6, 1999 |
| A cutting machine having a rotatingly driven cutting tool (2) and a tool guard (1). The tool guard (1) has a first tool guard part (11) which is fixedly mounted with respect to the apparatus and a second tool guard part (12) which can be pivotably mounted relative to the first tool guard |
| 5870981 |
Two-stroke engine having several transfer channels |
February 16, 1999 |
| A two-stroke engine for driving a crankshaft includes a cylinder defining a longitudinal elevation axis and having a top wall and a cylindrical side wall terminating in the top wall. A piston is mounted in the cylinder so as to be movable along the side wall for driving a crankshaft. The |
| 5839961 |
Bearing arrangement for a drive shaft |
November 24, 1998 |
| The invention is directed to a bearing arrangement for a drive shaft connecting a work tool to a drive unit. A protective tube has an inner wall surface and is part of this bearing arrangement. A bearing structure is mounted in the protective tube and has a bearing sleeve for accommo |
| 5819418 |
Working tool for trimming trees |
October 13, 1998 |
| A hand-guided working tool has a telescopic rod with a first and a second end and a drive motor connected to the first end. A working tool is connected to the second end of the telescopic rod. A telescopic drive shaft is enclosed in the telescopic rod. A first end of the telescopic d |
| 5746160 |
Hand-held working tool with combustion air channel arranged at blower housing |
May 5, 1998 |
| A hand-held working tool has a housing and an air cooled internal combustion engine with cooling ribs positioned in the housing. A sealed carburetor box is connected to the internal combustion engine. A blower is positioned in the housing for supplying cooling air to the combustion e |
| 5743240 |
Hand-guided, portable tool with internal combustion engine |
April 28, 1998 |
| A hand-guided, portable tool includes a housing and an internal combustion engine mounted in the housing. A fuel tank is mounted in the housing. The internal combustion engine has a carburetor with induction port for preparing a fuel/air mixture. An air filter is mounted in the housing. |
| 5740613 |
Trimming device with ergonomic handle bar |
April 21, 1998 |
| A trimmer has a drive motor, a cutting tool, and a drive shaft connecting the drive motor and the cutting tool. A protective tube encloses the drive shaft. A connector is provided for connecting a handle bar, having a first and a second section, to the protective tube. The first and seco |
| 5733183 |
Clamping device for axially clamping a disk-shaped tool |
March 31, 1998 |
| A clamping device for axially clamping a disk-shaped tool member on a shaft of a working tool has a pressure member for force-lockingly clamping the tool member between a radial surface of the shaft and the pressure member. A ring mount for force-loading the clamping member is provided f |
| 5730183 |
Valve for venting a container |
March 24, 1998 |
| A valve for venting a container has a valve housing with an annular chamber. A ring member with a first axial and a second axial end is arranged in the annular chamber. The ring member has a first sealing lip at the first axial end and a second sealing lip at the second axial end. A |
| 5725016 |
Pressure compensating valve for a fuel tank |
March 10, 1998 |
| The invention is directed to a pressure compensating valve for a fuel tank of a work apparatus such as a portable handheld work apparatus equipped with an internal combustion engine. The fuel tank has a tank wall and the pressure compensating valve includes a housing cap defining an inne |
| 5714724 |
Muffler mounted in a pipe |
February 3, 1998 |
| The invention is directed to a muffler for insertion into a pipe such as the intake pipe of an internal combustion engine. The muffler includes a base body defining a longitudinal axis and having first and second axial end faces. The base body has a plurality of pass-through openings for |
| 5706777 |
Suction air filter for a combustion engine with diaphragm carburetor |
January 13, 1998 |
| A suction air filter for an internal combustion engine with a diaphragm carburetor, wherein the combustion engine has a suction channel for taking in combustion air from a clean air side of the air filter and for taking in fuel from a fuel chamber, wherein the diaphragm of the diaphragm |
| 5699865 |
Antivibration device for mounting between a motor unit and a handle unit |
December 23, 1997 |
| The invention relates to an antivibration device between a motor unit 2 and a handle unit 9 of a portable handheld motor-driven chain saw 1. The antivibration device includes a sleeve-shaped elastic base body 6 having one of its ends 36 in a receptacle 20 of the motor unit 2 and the othe |
| 5692306 |
Hand-held working tool |
December 2, 1997 |
| A hand-held working tool has a tool member and a drive unit with an internal combustion engine drivingly connected to the tool member. A grip unit with vibration damping members is connected with the vibration damping members to the drive unit. Receiving cages for receiving the vibra |
| 5681508 |
Diaphragm carburetor for an internal combustion engine |
October 28, 1997 |
| A diaphragm carburetor for an internal combustion engine has a housing and a control chamber positioned in the housing and having a fuel inlet valve. A control diaphragm is positioned in the control chamber. A Venturi channel extends through the housing. At least one throttle valve is |
| 5676115 |
Work apparatus having an internal combustion engine |
October 14, 1997 |
| The invention relates to a cutoff machine having an internal combustion engine arranged for driving a work tool. The engine is held in a housing including a supporting component. Located in the housing is a fuel tank, from which the internal combustion engine is supplied with fuel. The f |
| 5655304 |
Guide bar with attached wear protector |
August 12, 1997 |
| A guide bar for a motor chain saw has a guide bar member having a peripheral guide groove and peripheral shoulders for guiding a saw chain in the peripheral direction of the guide bar member. The drive members of the saw chain engage the guide groove and the lateral connecting members |
| 5645026 |
Internal combustion engine for a portable handheld work apparatus |
July 8, 1997 |
| The invention relates to an internal combustion engine for a portable handheld work apparatus such as a motor-driven chain saw or the like. The internal combustion engine includes a cylinder defining a combustion chamber and having an inlet passage for conducting a fuel mixture into the |
| 5636444 |
Cutting device with frictional brake having a servo device with switching device for cancelling |
June 10, 1997 |
| A cutter has a drive motor and a drive shaft. A rotating cutting tool is connected to the drive shaft. A centrifugal clutch is connected between the drive motor and the drive shaft. A frictional brake having a brake drum and a brake element positioned on the brake drum to achieve a braki |
| 5623999 |
Hand-operated tool |
April 29, 1997 |
| A hand-operated tool has a casing containing a motor for driving a tool member of the tool and a metallic tubular grip with a tube wall connected to the casing. The tube wall of the tubular grip has a profiled outer mantle surface made by deforming the tube wall. The profiled outer mantl |
| 5595153 |
Portable handheld work apparatus having a filter case |
January 21, 1997 |
| The invention relates to a portable handheld work apparatus such as a motor-driven chain saw. The apparatus includes an internal combustion engine as a drive motor for a work tool. The engine is mounted in a housing. The engine draws combustion air from the clean compartment of a fil |
| 5582146 |
Suction air filter |
December 10, 1996 |
| A suction air filter for an internal combustion engine of a hand-held working tool has a housing having an inlet opening for air sucked in and an outlet opening for the clean air exiting the suction air filter and supplied as combustion air to a suction channel of the internal combustion |
| 5582143 |
Actuating device for a decompression valve of an internal combustion engine with cable starter |
December 10, 1996 |
| An actuating device for a decompression valve of an internal combustion engine with a cable starter, wherein the decompression valve is positioned within the cylinder of the internal combustion engine and comprises a valve member biased into its closed position, has a transmission lever |
| 5575260 |
Method and device for controlling ignition of an internal combustion engine as a function of eng |
November 19, 1996 |
| A method of controlling ignition of an internal combustion engine as a function of engine RPM includes the steps of revolving a magnet wheel and inducing with the revolving magnet wheel in an induction coil an initial voltage. At least one delay element is provided and the delay element |
| 5570512 |
Grip arrangement for a chain saw |
November 5, 1996 |
| A grip arrangement for a motor chain saw, wherein the motor chain saw has a housing and motor arranged in the housing, a saw chain driven by the motor, a chain guide extending in the longitudinal direction of the motor chain saw for guiding the chain saw, includes a handle extending in t |
| 5564192 |
Guide bar for a saw chain of a motor-driven chain saw |
October 15, 1996 |
| The invention relates to a guide bar for the saw chain of a motor-driven chain saw. The guide bar has a guide groove which extends about the periphery thereof wherein the saw chain runs. The guide groove is delimited by two side plates which are tightly connected to each other and ar |
| 5526843 |
Venting valve for a fuel tank |
June 18, 1996 |
| The invention relates to a venting valve for a fuel tank and includes a valve seat and a valve body which lies in sealing contact engagement therewith. The sealing surface of the valve seat faces toward the interior space of the tank in order to ensure an operationally-reliable venting |
| 5522355 |
Hand-held tool device, especially motor chain saw |
June 4, 1996 |
| A hand-held tool such as a chain saw has a housing and a combustion engine enclosed in the housing. The working tool is driven by the combustion engine. An air filter box has a filter element for dividing the filter box into a dirt room and a clean room. The air filter box is closed off |
| 5522143 |
Tensioning arrangement for a saw chain of a motor-driven chain saw |
June 4, 1996 |
| The invention is directed to a tensioning arrangement for saw chains of motor-driven chain saws which include a device for longitudinally displacing the guide bar. The clamped guide bar is released so that the adjusting arrangement can be actuated for the longitudinal displacement of |
| 5491899 |
Tensioning arrangement for a saw chain |
February 20, 1996 |
| The invention is directed to a tensioning arrangement for a saw chain of a motor-driven chain saw. The saw chain runs on a guide bar mounted on the motor housing of the chain saw. The tensioning arrangement includes a rotatable disc having a spirally-shaped guide slot in which a lug of a |
| 5483931 |
Drive device especially for a trimmer |
January 16, 1996 |
| A drive device has a housing and an internal combustion engine positioned in the housing. The engine has a crankshaft. A cable starter with a cable and a cable reel for receiving the cable is provided. The cable has a handle at its free end. A cable guide sleeve through which the cable i |
| 5480009 |
Brake system with two independent mechanical brakes |
January 2, 1996 |
| The device for braking an electric drive motor of a hand-held working tool has a safety brake for an immediate stopping of the working tool and an independent mechanical brake for coasting the working tool to a stop after switching off the drive motor. The mechanical brake acts on a rota |
| 5465698 |
Membrane carburetor |
November 14, 1995 |
| The invention is directed to a membrane carburetor for changing the air/fuel ratio. The membrane carburetor achieves the same result as previous carburetors but at a greater insensitivity to wear and disturbances as well as an improved controllability in a constructively simpler and |
| 5447131 |
Ignition circuit for an internal combustion engine |
September 5, 1995 |
| The invention is directed to an ignition circuit for an internal combustion engine in a portable handheld work apparatus wherein a work tool is driven via a clutch. The ignition circuit includes an ignition time point control which connects a spark plug via a switch to a voltage source i |
| 5441637 |
Suction head filter for a fuel tank |
August 15, 1995 |
| A suction head for a fuel line of a fuel tank, especially for hand-held working tools such as motor chainsaws, has a cup-shaped housing made of plastic and comprising a mantle wall with cutouts and an end face with an opening. A filter mesh is covering the cutouts. A filter insert is |
| 5419686 |
Fuel pump for an internal combustion engine |
May 30, 1995 |
| The invention is directed to a fuel pump for an internal combustion engine such as a two-stroke engine in a portable handheld work apparatus such as a motor-driven chain saw or the like. A pump chamber is connected via a suction valve to a fuel feed and via a pressure valve to a pressure |
| 5414934 |
Exchangeable sleeve bearing for a vegetation cutter apparatus |
May 16, 1995 |
| A vegetation cutter apparatus having a drive motor which drives a cutterhead via a drive shaft journalled in a guide tube, The cutterhead is held in a sleeve bearing at the end section of the guide tube facing away from the drive motor, The cutterhead is held in a simple manner by an |
| 5392747 |
Circuit for supplying voltage to a microprocessor in an ignition circuit for an internal combust |
February 28, 1995 |
| The invention is directed to a circuit for providing a controlled voltage supply to a microprocessor in an ignition circuit of an internal combustion engine equipped with a spark plug. The circuit includes: a generator having an induction coil and magnetic device for generating an al |
| 5372767 |
Method for applying a stopper to a rope |
December 13, 1994 |
| A stopper for a rope which is injection molded on the rope. The stopper has a sleeve-like shape and surrounds the rope without play and prevents an axial slippage of the stopper from the rope. A strut is formed as one piece with the stopper and extends radially through the inner diameter |
| 5363815 |
Cooling air blower with combustion air channel |
November 15, 1994 |
| A cooling air blower for a combustion engine for a two-stroke engine of a hand-held working tool has a cooling air channel for supplying cooling air to a combustion engine and a blower fan for conveying air into the cooling air channel. A combustion air channel branches off the cooling a |
| 5353754 |
Fuel-injection arrangement for an internal combustion engine |
October 11, 1994 |
| The invention is directed to a fuel-injection arrangement for a two-stroke engine in a motor-driven chain saw. An injection pump is mounted in a base housing with the injection pump including a pump piston axially displaceable in a pump cylinder. The pump piston delimits a pump chamber. |
| 5353506 |
Motor-driven chain saw having a guide bar |
October 11, 1994 |
| The invention is directed to a motor-driven chain saw having a drive motor arranged in a housing. The drive motor drives a saw chain on a guide bar via a sprocket wheel. The guide bar extends forwardly in the longitudinal direction of the chain saw and has an elongated slot in its rearwa |
| 5330138 |
Cable support for an electrically-operated portable handheld work apparatus |
July 19, 1994 |
| A cable holder for relieving strain on the current-supply cable of a portable handheld electrically-operated work apparatus such as a lawn mower or brushcutter. The cable holder includes a chamber fixed to the apparatus and a closure piece which is pivotally journalled on the chamber |
| 5320281 |
Housing for a high-pressure cleaning apparatus |
June 14, 1994 |
| The invention is directed to a housing for a high-pressure cleaning apparatus for accommodating a high-pressure pump, drive motor and other components of the apparatus coacting therewith. The apparatus is equipped with a cleaning lance which is held on the housing. The housing includes a |
| 5320240 |
Closure for a vessel |
June 14, 1994 |
| The invention is directed to a closure for a vessel such as a fuel tank or lubricant tank of a portable handheld work apparatus having an internal combustion engine. The closure includes a filling stub formed on the vessel and defining an opening and a cap for closing off the opening sea |
| 5284111 |
Two-state internal combustion engine |
February 8, 1994 |
| The invention is directed to a two-stroke internal combustion engine for handheld portable tools such as a motor-driven chain saw with the engine having a piston guided in a cylinder. The base of the piston is rotationally symmetrical and delimits a combustion chamber. An injection v |
