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| Number | Title | Issue Date |
| 7743513 | Chainsaw tensioning device A chainsaw has a cam lever and cam assembly that can be used to adjust the tension of a guide bar in the chainsaw. Once the tension of the guide bar has been lessened, the guide bar can be moved back and forth by using a chain-tightening knob and tightening mechanis... | 06/29/2010 |
| 7676934 | Keyless adjusting mechanism for chain saw A keyless adjusting mechanism for a chain saw is disclosed herein, which comprises a protection cover, an adjusting bolt, an adjusting stud, and an adjusting ring with a driver gear, wherein the adjusting bolt is coupled with a driven gear for engaging with the driv... | 03/16/2010 |
| 7600323 | Auto chain tensioner The invention relates to an auto tensioner of a chain saw. A spiral guide groove (16) of the disk (15) engages with a protrusion 10a of a slider piece (10) and the slider piece (10) is slidably stored in a guide portion (... | 10/13/2009 |
| 7481000 | Chainsaw bar adjustment assembly with breakaway adjustment pin A bar adjustment assembly for a chain saw includes a shaft, a bar adjustment pin that is journalled for rotation relative to the shaft, and a pin alignment spring that biases the pin toward an engagement position. A void is provided for accommodating the pin as it i... | 01/27/2009 |
| 7434502 | Bar knob with cam-operated locking mechanism A chain saw includes a retaining assembly for a tensioning arrangement for adjusting the tension of the cutting chain in the chain saw. The retaining assembly includes a rotatable knob for operation with the chain saw's engine chassis, clutch cover, and guide bar an... | 10/14/2008 |
| 7350301 | Tension-adjusting device for a chain in chain saw A tension-adjusting device for a chain in a chain saw comprises an adjusting assembly, a fixing base, a brake disk, a position piece and a fixing piece, wherein the adjusting assembly, the brake disk, the position piece and the fixing piece are locked together on th... | 04/01/2008 |
| 7331110 | Device for a pole saw This invention relates to a device for a pole saw for pruning trees or bushes. The pole saw comprises an elongated stiff tube extending from a drive unit to a remote chain saw head (12) and incorporates a drive shaft (14) connected to an input shaft ( | 02/19/2008 |
| 7322114 | Saw chain tensioning mechanism A saw chain tensioning mechanism for adjusting the tension in a saw chain extending around a chain guide plate includes a threaded rod member disposed adjacent to a rear end of the chain guide plate and along the longitudinal direction of the chain guide plate, a mo... | 01/29/2008 |
| 7316299 | Brake device for chain saw A brake device for a chain saw is provided, wherein a driving shaft, which passes through a brake block, a torsion spring, a driving block and a chain wheel, is assembled with a driven gear, and two ends of the torsion spring are respectively fixed to the brake bloc... | 01/08/2008 |
| 7311029 | Quick-pin blade tensioning device A quick-pin blade tensioning device for a band saw comprises a sliding tension bracket coupled with an upper arm of the band saw. The sliding tension bracket engages an upper band wheel which has a band saw blade coupled to it. A lifting shoe, slidably disposed with... | 12/25/2007 |
| 7287330 | Chain saw automatic tensioner A chain saw automatic tensioner preferably includes a base plate, a chain bar, a tensioning cylinder, a sliding block and a pusher block. The base plate includes a sliding slot that is sized to slidably receive the sliding block. The chain bar includes a substantial... | 10/30/2007 |
| 7185437 | Chainsaw bar tensioning apparatus A chain saw bar tensioning apparatus is disclosed comprising a sliding member having a recess formed therein. The sliding member is adjacent to a first tensioning member that biases the sliding member in a direction such that when the apparatus is incorporated into ... | 03/06/2007 |
| 7155832 | Chain saw with tool-less chain tensioner and guide bar lock A chain saw includes an engine, a chassis, and a clutch cover. A guide bar is adjustable relative to the chassis and the clutch cover, but stationary while in a secured position. An adjustment arrangement moves the guide bar to tension a chain, and includes a member... | 01/02/2007 |
| 7107689 | Bar knob with integrated lock A retaining assembly is provided for a tensioning arrangement for adjusting the tension of the cutting chain in the chainsaw. The retaining assembly includes a knob body, a lock, and a lever. The lock and lever rotate about a common axis, which is perpendicular to a... | 09/19/2006 |
| 7101295 | Power transmission device and portable power working machine provided with the same A power transmission device is disclosed which is capable of easily, swiftly and appropriately altering the distance between the axes of a pair of transmission wheels such as pulleys, enabling an endless belt to be kept under constant and appropriate tension without... | 09/05/2006 |
| 7082689 | Keyless shoe lock for reciprocating saw The present invention is directed to a keyless shoe lock assembly for a reciprocating saw. The keyless shoe lock assembly is capable of engaging and releasing a shoe bracket for the positional adjustment of a shoe relative to a blade clamp of the reciprocating saw. ... | 08/01/2006 |
| 6944957 | Chain saw with a tensioning arrangement The invention concerns a motor powered saw with a saw chain (2) and a guide bar (1), the rear portion of which is covered by a side cover (3) and during operation clamped with a certain clamping force between the side cover and a counter support... | 09/20/2005 |
| 6944958 | Chain saw chain tensioning and braking system A chain saw which includes chain tensioning and braking systems. Tensioning and braking are caused by the presence and control of longitudinal and lateral slits in an elongated support which provides a continuous chain channel guide in its outer circumference. ... | 09/20/2005 |
| 6877233 | Chain saw adjuster mechanism with locking teeth A tensioning mechanism for adjusting tension of a cutting chain in a chain saw. A rotatable knob operates with an engine chassis, clutch cover, and guide bar, whereby the knob may be rotated between a tightened position and loosened position, by which the guide bar ... | 04/12/2005 |
| 6782627 | Chain saw The chain tension of a motorized chainsaw (10) with a housing (12), a sprocket (22) mounted thereon, and a blade (14) that is aligned with this sprocket, which blade protrudes beyond the housing (12) and guides a saw chain (16 | 08/31/2004 |
| 6694623 | Lever chain adjuster for a chain saw A cam lever arrangement is provided which permits the loosening and tightening of the chain on the chain saw blade tool with a simple lever motion. The lever arrangement is connected to the motor housing cover door. Opening the door automatically loosens ... | 02/24/2004 |
| 6651347 | Portable handheld work apparatus The invention relates to a portable handheld work apparatus including an overhead branch cutter. The work apparatus has a drive motor (4) mounted at one end (2) of a carrier tube (3). A work tool (6) is held at the other end (5) of the carrying tube (3). ... | 11/25/2003 |
| 6564459 | Chain saw In a chain saw having a sprocket (11), which is supported in rotary fashion in a housing (10) and is for a saw chain (12) guided on a guide (13), and having a chain tension device (14) for longitudinally moving the blade (13), which device has a cam (15) ... | 05/20/2003 |
| 6560879 | Chain saw adjuster An arrangement that provides a semi-automatic tension adjustment of an endless cutting chain on a guide bar of a chain saw as the links of the chain wear with use. A specially designed cam biases a tensioner pin to continuously force the guide bar away fr... | 05/13/2003 |
| 6539832 | Hydraulic stretching device for a saw chain A hydraulic stretching device for a saw chain active in sawing apparatus having a saw bar and including a holder (1), a driving wheel (3) for the saw chain arranged essentially stationary in relation to the holder and a guiding part (7) permanently arrang... | 04/01/2003 |
| 6532671 | Tension adjustment device for a chain saw An adjusting device has a driving disk with two diametrically oppositely formed arcuate tracks formed thereon and a driven plate securely connected to the chain saw and having multiple bosses evenly and horizontally distributed on the driven plate. The tw... | 03/18/2003 |
| 6493949 | Chain saw with an improved chain tensioning arrangement A chain saw (1) includes a guide bar (5) supporting a chain (7) and attached to a main body (3). Disposed within the body is an anchor bolt (9) for securing the guide bar to the main body. Disposed within a sprocket cover (8) is a hexagonal nut (11) screw... | 12/17/2002 |
| 6473975 | Power chain saw with a saw guide maintained clamped between the housing and a tightening element A power chain saw with a drive motor arranged in a housing drives a saw chain circulating on a saw guide, wherein the saw guide is held clamped by one end transversely to its surface plane between the housing and a tightening element, and for tightening t... | 11/05/2002 |
| 6415516 | Power cutting device A power cutting device for cutting material in tight places. The power cutting device includes a power cutting device comprising a housing. The housing includes a first end and a second end. A first shaft is securely coupled in and extending away from the... | 07/09/2002 |
| 6389700 | Chainsaw bar guard An easily engageable and releasable chainsaw bar guard for protecting an individual carrying a chainsaw and for preventing damage to the cutter chain and saw dogs of a chainsaw. The bar guard comprises an elongated stiff hollow sleeve whose interior space... | 05/21/2002 |
| 6345447 | Chain saw A chain saw includes a chain arranged on a saw flange (5). The chain saw is usually arranged in a multi-purpose head of forestry machinery by a mounting flange (1) immobile in regard to the multi-purpose head, whereby the chain is rotated by a chain wheel... | 02/12/2002 |
| 6311599 | Valve arrangement A valve device including a cylindrically-shaped space and a displaceable piston dimensioned to fit and move between forward and rearward stop positions within the space, having a first opening connection or inlet to the hydraulic system and a second openi... | 11/06/2001 |
| 6296586 | Tensioning device for a chain or a belt drive for a motor of a hand machine tool A tensioning device for a chain or a belt drive for a motor of a hand machine tool, especially for a chain saw or a grinding or abrasive cutting-off machine, with a longitudinally movable bracket, such as a bracing or an arm, which can be fixed together w... | 10/02/2001 |
| 6256890 | Mounting mechanism for an adjustable component that is to be held A mounting mechanism for an adjustable component that is to be held against an abutment surface of a housing, especially for the guide bar of a power chain saw, is provided. The mechanism includes at least two bolts that are provided on the housing, are s... | 07/10/2001 |
| 6237228 | Apparatus for adjusting tightness of a chain saw cutting element A chain saw has a spacer plate that provides an initial clearance space between an outer surface of an elongate flat blade that carries the cutting element of the saw and an inner surface of a recessed wall formed in a motor cover that forms a part of the... | 05/29/2001 |
| 6237229 | Chain saw guide bar with chain-tightening device A chain saw guide bar has a pair of elongated chain guide plates, which are superimposed with each other and receive a saw chain. Positioning slots extend in the longitudinal direction of the guide plates and receive a pair of fixing stud bolts that proje... | 05/29/2001 |
| 6148525 | Chain tension device in a chain saw A chain tension device for tensioning a cutting chain of a chain saw utilizing a guide bar having an outer periphery and a drive sprocket. The chain saw body supports the guide bar, the sprocket and a drive source. A cutting chain is wound around the spro... | 11/21/2000 |
| 6061915 | Tightening mechanism for chain saw guide bar A chain saw guide bar including a chain tightening mechanism. A shaft or rack slidable within the bar body includes a head portion slidable rearwardly against a bar mounting stud. The head portion resides between opposed edges formed in the bar body and t... | 05/16/2000 |
| 6049986 | Chain saw guide bar equipped with chain tensioner A chain saw guide bar has self-contained mechanism to force movement of the guide bar away from a drive sprocket to tension the saw chain. The mechanism includes a bearing surface that engages a mounting stud on the chain saw housing and a rotatable porti... | 04/18/2000 |
| 6032373 | Methods and apparatus for adjusting chain saw tension A chain saw includes a chain formed into a closed loop about a drive sprocket and a support bar. A first piston is operable to move the support bar radially away from the drive sprocket, and a second piston is operable to limit such movement.... | 03/07/2000 |
