Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 7357221 | Exhaust gas muffler An exhaust gas muffler is provided for an internal combustion engine, especially for an internal combustion engine in a manually-guided implement such as a power saw, a cut-off machine, or the like. The muffler has a housing having an inlet for exhaust gases and an ... | 04/15/2008 |
| 7331276 | Piston for a two-cycle engine A piston for a two-cycle engine having a piston head and a piston wall in which are disposed wrist pin eyes. At least one undercut is formed between the underside of the piston head and the wrist pin eyes at a distance from the piston head. The undercut extends from... | 02/19/2008 |
| 7311067 | Implement A manually operated implement comprising a housing for accommodating a drive motor that drives a tool. A fan wheel is disposed in the housing and is driven by the drive motor. A fan wheel cover covers the fan wheel toward the outer side of the housing. Ribs are disp... | 12/25/2007 |
| 7309028 | Portable sprayer A portable sprayer having a backpack to which are secured a blower unit and a supply tank. The blower unit includes a drive motor and a blower driven thereby. The blower unit is mounted on the backpack by at least one anti-vibration element. The supply tank, for exa... | 12/18/2007 |
| 7293330 | Tubular handle for a manually guided implement A tubular handle for a manually guided implement, especially a power chain saw or the like, is provided. The handle has an essentially circular cross-section and at least one mounting portion for fixing the handle to the implement. In the area of the mounting portio... | 11/13/2007 |
| 7279021 | Suction device/blower A manually-guided, portable suction device/blower is provided, and includes a blower unit having a motor for driving the blower unit, a blower tube that extends from the blower unit, a collection bag, wherein during suction operation of the suction device/blower, th... | 10/09/2007 |
| 7278395 | Manually operated implement driven by an internal combustion engine A manually guided implement driven by an internal combustion engine having a carburetor that is actuated by a throttle lever arrangement, which includes a throttle lever that is mounted in the implement so as to be pivotable about a pivot axis, and also includes a t... | 10/09/2007 |
| 7267089 | Manually guided implement having a spark plug connector arrangement A manually guided implement comprising an engine housing that at least partially surrounds a cylinder of an internal combustion engine. The engine housing has a wall provided with an opening for a spark plug that is disposed in the cylinder. A spark plug connector a... | 09/11/2007 |
| 7261281 | Carburetor A carburetor including a mixture channel and an air channel that are separated from one another, wherein a fuel opening opens into the mixture channel. A throttle element is rotatable about an axis of rotation that extends transverse of the direction of flow in the ... | 08/28/2007 |
| 7225713 | Cutting blade for a motor-driven, manually-guided implement A cutting blade for a motor-driven implement is provided. The cutting blade has a main body having a central fastening opening and blade sections that extend approximately radially from the main body. The blade sections have edges that extend in a radial direction a... | 06/05/2007 |
| 7201120 | Two-cycle engine A two-cycle engine having a piston reciprocalbly mounted in a cylinder in which a combustion chamber is formed. In prescribed positions of the piston, the combustion chamber communicates with a crankcase via at least one transfer channel. A portion of an intake chan... | 04/10/2007 |
| 7152853 | Manually operated implement A manually operated implement such as a chain saw, a parting-off grinder or similar device has an internal combustion engine to drive a tool and a handle arrangement to operate the implement. The handle arrangement is connected to the internal combustion engine via ... | 12/26/2006 |
| 7137877 | Manually operated tool A manually operated implement, in particular a parting-off grinder or similar device is provided. The implement has a bracket which has a first end, which is fixed to the housing of the tool, and a second end to which is fixed a spindle which drives, for example, a ... | 11/21/2006 |
| 7131406 | Two-cycle engine having scavenging A two-cycle engine in a portable, manually-guided implement, such as a power chain saw, a cut-off machine, a brush cutter, or the like, is provided. The cylinder has a combustion chamber that is delimited by a reciprocating piston that via a connecting rod drives a ... | 11/07/2006 |
| 7100551 | Two-cycle engine with forward scavenging air positioning and single-flow carburetor A two-cycle engine 1 is provided and has a cylinder in which is formed a combustion chamber that is delimited by a piston which, via a connecting rod, drives a crankshaft rotatably mounted in a crankcase. The engine has an air duct that communicates with a tr... | 09/05/2006 |
| 7080851 | Guide cart A guide cart for an implement including a frame on which is disposed at least two wheels, and a first strut on which is disposed at least one wheel, and a second strut, wherein for a mounting of said second strut on said frame at least two spaced-apart mounting poin... | 07/25/2006 |
| 7066120 | Two-cycle engine A two-cycle engine is provided that has a cylinder in which is formed a combustion chamber delimited by a reciprocating piston that via a connecting rod drives a crankshaft rotatably mounted in a crankcase. An inlet is provided for a supply of fuel into the crankcas... | 06/27/2006 |
| 7047937 | Internal combustion engine An internal combustion engine is provided, and has a throttle element mounted in the intake channel of the engine so as to be pivotable, via a throttle shaft, between an idling position and a full-load position. An abutment is fixedly connected with the throttle sha... | 05/23/2006 |
| 7044091 | Cylinder for an internal combustion engine of a manually guided implement A cylinder for an internal combustion engine of a manually guided implement, and a method of producing such a cylinder, are provided. A cast cylinder body that peripherally delineates a cylinder chamber has formed therein at least one transfer channel that is open i... | 05/16/2006 |
| 7021253 | Two-cycle engine A two-cycle engine is provided and includes a cylinder in which is formed a combustion chamber delimited by a reciprocating piston that via a connecting rod drives a crankshaft rotatably mounted in a crankcase that, in predetermined positions of the piston, communic... | 04/04/2006 |
| 7017552 | Operating mechanism An operating mechanism is provided and has an operating lever, an adjusting lever, and a valve element that is rotatably disposed in a channel, wherein the adjusting lever is connected with the valve element via a shaft. A coupling element is provided for interconne... | 03/28/2006 |
| 7011298 | Intake device An intake device having an intake channel that includes an intake channel section is provided. A butterfly valve is pivotably mounted in the intake channel section. A dividing wall is disposed downstream of the butterfly valve and divides the intake channel section ... | 03/14/2006 |
| 6991664 | Intake system An intake system for the combustion air of a motor of a hand held implement is provided. The system includes an air filter and a centrifugal separator. The air filter has a dirt chamber and a clean chamber that is separated therefrom by a filter medium. The clean ch... | 01/31/2006 |
| 6973726 | Manually operated tool A manually operated implement is provided having a housing fixed on a frame and accommodating an internal combustion engine that is adapted to drive a tool. The implement has a front hand grip secured to the frame, and a rear handle secured to a side of the frame th... | 12/13/2005 |
| 6955152 | Manually operated tool A manually operated tool such as a parting-off grinder, chainsaw or similar device has a tank housing which contains a fuel tank. The tool has an air cleaning unit, the tank housing being connected to the clean air side of the air cleaning unit via a bleed device. A... | 10/18/2005 |
| 6953011 | Two-cycle engine A two-cycle engine, especially for a portable, manually-guided implement, is provided. The engine has a cylinder with a combustion chamber delimited by a reciprocating piston. An inlet opens into the cylinder for supplying fuel/air mixture into a crankcase. The engi... | 10/11/2005 |
| 6945203 | Two-cycle engine A two-cycle engine is provided, especially in a manually-guided implement such as a power chain saw, a brush cutter, a trimmer or the like, and has a cylinder in which is formed a combustion chamber that is delimited by a reciprocating piston that, via a connecting ... | 09/20/2005 |
| 6932058 | Carburetor arrangement for an internal combustion engine A carburetor arrangement is provided for an internal combustion engine that is to be started with a pull cord. A fuel channel that is connected with a fuel-filled storage space opens into and supplies fuel to an intake channel portion as a function of the underpress... | 08/23/2005 |
| 6925718 | Tool head A tool head for a motor-driven, manually guided implement for receiving a rotatable cutter tool is provided. The tool head comprises a housing in which is provided a tool shaft that is rotatably mounted via bearings. Secured on the tool shaft so as to turn with it i... | 08/09/2005 |
| 6918359 | Rigid connecting duct A portable, manually-guided implement, such as a cut-off machine, is provided and has an internal combustion engine, a cylinder of which has a combustion chamber with an exhaust gas outlet. The combustion chamber is delimited by a piston that, via a connecting rod, ... | 07/19/2005 |
| 6913250 | Carburetor arrangement A carburetor arrangement for an internal combustion engine in a manually guided implement, such as a power chainsaw, a cut-off machine, etc. is provided. A regulating chamber delimited by a regulating diaphragm is provided. Upon deflection of the diaphragm due to un... | 07/05/2005 |
| 6896113 | Manually operated tool A manually guided implement is provided and has an internal combustion engine and a power take-off housing to which the engine is secured. A centrifugal clutch is provided for achieving a positive connection, as a function of engine speed, between a drive part, whic... | 05/24/2005 |
| 6895910 | Two-cycle engine having scavenging A two-cycle engine, especially for a portable, manually guided implement, has a combustion chamber cylinder in which a piston reciprocates. The engine has at least one transfer channel that fluidically connects the crankcase with the combustion chamber and opens the... | 05/24/2005 |
| 6889637 | Two-cycle engine with forward scavenging air positioning and single-flow carburetor A two-cycle engine having forward scavenging is provided. Mixture drawn into the crankcase via a butterfly valve carburetor is conveyed into a combustion chamber via transfer channels in the cylinder. An air duct is connected via a controllable connection with a tra... | 05/10/2005 |
| 6880503 | Port-controlled two-cycle engine having scavenging A two-cycle engine includes a reciprocating piston reciprocable in a combustion chamber and interconnected with a crankshaft in a crankcase. A transfer channel selectively fluidly connects the crankcase with the combustion chamber so a fuel/air mixture in the crankc... | 04/19/2005 |
| 6880248 | Motor driven implement An implement having a drive motor and a tool is provided. A drive shaft is mounted in a guide tube and interconnects the drive motor and tool for rotatingly driving the tool. The drive shaft includes a main member in the form of a hollow shaft having ends on which a... | 04/19/2005 |
| 6874455 | Two-cycle engine A two-cycle engine, especially in a portable, manually-guided implement, is provided, and has a combustion chamber that is formed in a cylinder and is delimited by a reciprocating piston, which via a connecting rod drives a crankshaft mounted in a crankcase. The eng... | 04/05/2005 |
| 6871573 | Saw chain A saw chain for a power chain saw is provided and comprises drive links and side links that connect them, whereby alternatingly disposed on one and the other longitudinal side of drive links, in place of a side link, are a cutter link and a leading safety link. The ... | 03/29/2005 |
| 6868829 | Maximum speed limitation for a two-cycle engine A method of limiting the maximum speed of a two-cycle engine in a manually-guided implement such as a hedge trimmer is provided. Via a unit for controlling the ignition time point in a crankshaft angular range prior to the upper dead center position of a reciprocati... | 03/22/2005 |
| 6860019 | Tool head of a trimmer A tool head of a trimmer is provided, and has a gear mechanism housing and a rotatably drivable tool shaft that is mounted in the housing. Held upon the tool shaft is a hub portion that rotates with the tool shaft. On that side that faces the hub portion, the tool h... | 03/01/2005 |
