Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 7357056 | Cutting tool safety system A woodworking machine is disclosed. The machine includes a cutting tool and a motor adapted to drive the cutting tool. The machine further includes a detection system to detect a dangerous condition between the cutting tool and a person, such as a person coming into... | 04/15/2008 |
| 7334611 | Arrangement in connection with crosscutting saw of harvester An arrangement in connection with a crosscutting saw of a harvester. Herein, a lattice-like structure composed of strips is provided in a saw casing of the crosscutting saw, the structure being substantially on the same section plane as the rotational movement of a ... | 02/26/2008 |
| 7240869 | Lubricating system for metal-demolition shears A lubricating system for a heavy-duty metal demolition shears provides lubricating lubricant to one of more wear parts. The system includes a hydraulic lubricant pump that is actuated by the main hydraulic control system that opens and closes the jaws of the shears.... | 07/10/2007 |
| 7200941 | Chainsaw throttle and brake mechanisms A chainsaw is provided having a brake band disposed about a drum that rotates during advancement of the saw chain about the saw bar. An end of the brake band is biased to a position that draws the brake band tight about the drum to prevent advancement of the saw cha... | 04/10/2007 |
| 7033149 | Medium pump adapted for ease of disassembly and assembly A medium pump for a motor includes a pump case with a pump cylinder and a pump piston positioned displacaebly in the pump cylinder in the direction of a pump axle. The pump piston rotates about the pump axle by running off an oblique control surface and realizes axi... | 04/25/2006 |
| 6990770 | Apparatus for trimming and chemically treating trees Disclosed herein is an apparatus preferably coupled to a boom on a truck which can simultaneously trim and chemically treat trees or other vegetation with a herbicide. The apparatus, in addition to have a standard saw blade assembly with limb clamping jaws, includes... | 01/31/2006 |
| 6976299 | Stump treatment guide bar A tree harvesting guide bar adapted for treating stumps with a treatment material as the tree is being harvested is provided, and more particularly a valve arrangement for enabling connection of the guide bar inlet to treatment material sources on a variety of diffe... | 12/20/2005 |
| 6643933 | Guide bar for chain saw including stump treatment A guide bar for a chain saw of a tree harvester adapted for applying treatment material to the stump upon severing a tree. The guide bar, typically a laminated bar includes an inner channel in the inner laminate that connects to a series of dispersal hole... | 11/11/2003 |
| 6622387 | Tank for an operating substance and especially a tank for an operating substance for a portable handheld work apparatus The invention relates to an operating substance tank (1) which is especially for a portable handheld work apparatus (2). The tank (1) has a fill opening (3) and a suction connection (4). The tank is configured from a first housing part (6) and a second ho... | 09/23/2003 |
| 6619171 | Guide bar for tree harvesting including stump treatment A guide bar having fluid conveying channels at the opposed sides. The channel on one side provided by the manufacturer with holes or orifices for dispensing treatment fluid from the channels onto a stump being sawn. The other side provided with markings t... | 09/16/2003 |
| 6490795 | Power chain saw having a chain fluid pump A chain medium pump (20) for a motor chain saw (10) is made disconnectable in a simple manner, the chain medium pump (20) sucking the chain medium over a suction pipe (29) from a tank (22) and delivering it over a pressure pipe (27) to a sawing device (12... | 12/10/2002 |
| 6443197 | Chain in a sawing device, and a motor-driven sawing device A sawing device and a chain for it, comprising at least two adjacent sequences of connecting links, of which at least some are cutting teeth; and a sequence of drive links fitted between two adjacent connecting link sequences, wherein an opening at the re... | 09/03/2002 |
| 6397475 | Chainsaw guide bar having liquid-conducting channels A chainsaw guide bar has tubes to convey liquid such as lubricants, fungicides, paints, etc. The tubes, made of soft deformable metal, are placed in respective grooves formed in the guide bar and are then deformed. The grooves include an undercut side, wh... | 06/04/2002 |
| 6397452 | Guide bar including stump treatment A guide bar for the treatment of tree stumps. A channel formed in the bar length is fitted with a soft metal tube. The tube is pierced with a piercing tool that produces hole forms leaving a center opening inset toward the tube center with flared sides th... | 06/04/2002 |
| 6363981 | Lubrication system for a wood cutting machine In the operation of wood cutting machines such as delimbing machines which use chain saw cutting devices, it is common to either position the lubricating oil reservoir above the chain saw cutting device to create a gravity-fed system or couple a pump appa... | 04/02/2002 |
| 6354006 | Chain saw for branch cutting A chain saw for cutting branches of up to 200 mm in diameter and above, including a main body, a self-priming pump, a joint, a positioning washer, a collar bracket, an oil sump, hook supports and a blade. It falls within the technical field of human requi... | 03/12/2002 |
| 6219921 | Chain saw guide bar with cleaning means A chain saw guide bar with at least one internal channel for spraying the sawn surface with liquid through nozzles, where the channel is extended in front of the nozzles by an end portion terminated by a closeable cleaning hole with a larger section than ... | 04/24/2001 |
| 6182722 | Saw assembly A saw assembly for a grip-harvester comprises a saw chain running around a bar, a pivotably journalled bar holder, and a liquid supply device having at least one nozzle for supplying at least one functional marking liquid to a cut surface produced during ... | 02/06/2001 |
| 6161453 | Saw chain sharpener for a chain saw A saw chain sharpener for a chain saw and a chain saw having a sharpener in which the bottom surfaces of the cutting teeth of a conventional bottom sharpened saw chain are conveniently sharpened automatically by running the chain under power through the s... | 12/19/2000 |
| 5896669 | Cutterhead for an overhead branch cutter 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 asse... | 04/27/1999 |
| 5845402 | Chain saw guide bar with replaceable liquid-conducting tubes A guide bar for a chain saw includes a pair of side plates and a center plate disposed therebetween. Each of the side plates includes spray holes through which a liquid can be sprayed. Liquid-conducting tubes are mounted in a longitudinal center slot of t... | 12/08/1998 |
| 5797187 | Chain saw guide bar having dye-emitting nozzles A chain saw guide bar is formed of a middle plate and a pair of side plates affixed on opposite sides of the middle plate. One (or both) of the side plates carries nozzles for emitting liquid dyes of different respective colors. Channels for conducting li... | 08/25/1998 |
| 5778537 | Chain saw guide bar with liquid spray device Chain saw guide bar and method of using a guide bar for spraying liquid on a sawn surface through a plurality of orifices formed in a guide bar side plate. The liquid is introduced into an inlet portion of a passage formed in a center plate of the guide b... | 07/14/1998 |
| 5718050 | Pruning cutter A powered pruning saw is disclosed in which a drive motor is connected to an elongated drive shaft rotatably held within an shaft or pole. A gear head is mounted at the other end of the pole to the remote end of the drive shaft. The gear head includes a g... | 02/17/1998 |
| 5669140 | Chain saw guide bar having a lubricant feeding structure A chain saw guide bar having a lubricant feeding structure is capable of providing sufficient lubrication to the guide bar tip portion and has sufficient strength and durability during use over an extended period of time and, at the same time, has the wei... | 09/23/1997 |
| 5653028 | Saw blade machine and trimmer A trimmer which can reduce the size of a section including a lubricating oil pump for automatically supplying a lubricating oil to a saw chain during the drive of the saw chain and drive shaft members for driving the saw chain, and secure good mountabilit... | 08/05/1997 |
| 5634273 | Guide bar having an oil-feed channel The invention relates to a guide bar (9) for a saw chain (10) having a sword-shaped base body (16). A peripheral guide groove (11) is introduced into the periphery (17) of the base body (16). an oil-feed channel (22) is provided which opens into the guide... | 06/03/1997 |
| 5564484 | Color-marking assembly in the cutting flange of a timber harvester The object of the invention is a colour-marking arrangement in the cutting flange of timber harvester. The arrangement includes a flange (1) with a carrier (6, 7), an adapted pipework (4), a series of channels (12) formed to the carrier (6, 7) and connect... | 10/15/1996 |
| 5426854 | Chain saw guide bar with liquid spray device A chain saw guide bar allowing spraying of the cut surface of a stump with liquid, is made from three joined plates with a spraying device comprising one or more supply channels provided as cutouts in the central plate. A plurality of spraying holes are p... | 06/27/1995 |
| 5386756 | Saw chain for a motor-driven chain saw The invention relates to a saw chain for a motor-driven chain saw equipped with a guide bar and a drive motor for imparting a force to the saw chain for moving the latter around the guide bar in a predetermined running direction. The chain saw is further ... | 02/07/1995 |
| 5216814 | Chain saw guide bar A chain saw guide bar comprises an elongate plate member having a rounded tip and providing guide means for a saw chain around its periphery. The plate member has a network of intercommunicating passageways provided between its lateral faces and extending... | 06/08/1993 |
| 5214864 | Chain saw The prime mover of a chain saw has an output shaft passing through the body of an oil pump. A fixing screw is inserted through an inserting hole provided in the body and is screwed into a threaded hole provided on the side of the prime mover. A cover plat... | 06/01/1993 |
| 5184403 | Motor-driven chain saw having a lubricating oil pump The invention is directed to a motor-driven chain saw having a drive motor which drives a saw chain via a sprocket with the saw chain running around the periphery of the cutter bar in a guide groove formed in this periphery. A brake device is provided to ... | 02/09/1993 |
| 5143131 | Selectable spray pattern chain saw bar system A fluid spraying saw bar, and a chain sawing apparatus, such as a tree harvester, having such a saw bar are provided for selectively applying a predetermined fluid pattern of urea on a tree stump during felling, and of paint on a log end during bucking. A... | 09/01/1992 |
| 5092044 | Fluid injecting nose sprocket for a chain saw guide bar A guide bar for a chain saw having interior channels for conducting fluid to a nose end of the bar. The channel conducts fluid to the nose end of the bar where a sprocket is rotatably mounted. The sprocket has grooves formed in each side of its body for i... | 03/03/1992 |
| 5088197 | Power-driven chain saw There is disclosed a power-driven chain saw converted from a stripped-down power-driven circular power hand saw which has a unitary housing adapted to be mounted on the power unit of the stripped-down power-driven hand saw. The housing has bosses or raise... | 02/18/1992 |
| 5056224 | Tree harvester guide bar A guide bar for a saw chain mounted to the boom of a tree harvester. As typical for such guide bars, oilhole holes are provided to receive oil for channeling of the oil to the edge grooves wherein the saw chain is entrained. Not typical of such guide bars... | 10/15/1991 |
| 5050303 | Chain saw bar fluid passage system An improved saw bar and a chain sawing assembly includes a frame which houses a drive engine or motor and receives the saw bar, an endless cutting chain, and a sprocket mechanically coupling the drive engine to the cutting chain. The saw bar includes a ba... | 09/24/1991 |
| 5035057 | Chain guide for power chain saws A chain guiding rail for use in power chain saws has a tip part defining an arcuate run-in section extending from an end point of a forward-run section to the vertex of the tip part, and a run-out section extending from the vertex point to a start point o... | 07/30/1991 |
| 4996774 | Guide bar for the saw chain of a motor-driven chain saw and a method and apparatus for producing the same The invention is directed to a guide bar which includes a fill body in the guide groove thereof. The fill body is disposed in the region of a lubricating bore and bridges the gap between the bottom of the groove and the rakers of the drive links of the sa... | 03/05/1991 |
