Having Noncutting Depth Gauge Patents (Class 83/834)
  • Patent number: 9718204
    Abstract: An assembly for cutting foam, nonwoven, rubber, and composite products has a guide having a longitudinally extending guide edge formed with a longitudinally extending and outwardly open groove. A longitudinally extending row of cutting elements extends along the guide edge, and element each has an entrainment dog projecting inward into the groove, a support riding on the guide edge and having sides each formed with a pair of longitudinally spaced and outwardly open recesses, a base outward of the support, and a wedge-section cutting tooth forming a cutting edge outside the base and having a pair of longitudinally extending flanks converging at the cutting edge. Coupling links extend between and have ends set in the recesses of adjacent cutting elements. Pivot pins extend through the ends of the links and through the supports at the bases. The base is of a maximum width greater than a width of the assembly at the pins.
    Type: Grant
    Filed: October 13, 2015
    Date of Patent: August 1, 2017
    Assignee: ALBRECHT BAEUMER GMBH & CO. KG
    Inventor: Andreas Eichenauer
  • Patent number: 9038519
    Abstract: Embodiments herein provide a modified pitch sprocket to provide an orientation of a saw chain link, such as a cutter link or drive link, with respect to the direction of travel of the link, as it traverses the sprocket that is different than the orientation of the link as it traverses a straight portion of the guide bar. In some embodiments, the modified pitch sprocket may orient the cutter link to provide radial extension for a depth gauge of the cutter link relative to a cutting element of the cutter link. This may facilitate shaping of the depth gauge and/or cutting element, such as by a sharpening element, as the cutter link traverses the sprocket.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: May 26, 2015
    Assignee: Blount, Inc.
    Inventors: Mike Goettel, Michael D. Harfst, Christopher D. Seigneur
  • Patent number: 8746118
    Abstract: Embodiments provide various components of a chain saw, including saw chain elements, sprockets, and other fixtures, that may facilitate sharpening of cutter links during operation. In various embodiments, the components may increase stability during sharpening, provide nose mounted sharpening fixtures, and/or facilitate the resizing and/or reshaping of a sharpening element.
    Type: Grant
    Filed: June 25, 2009
    Date of Patent: June 10, 2014
    Assignee: Blount, Inc.
    Inventors: Chris Seigneur, Mike Goettel, Michael Patterson
  • Publication number: 20130291702
    Abstract: A cutting chain (100) moving in a cutting direction (120) is disclosed in the present invention. The cutting chain (100) includes a cutting link (106), which further includes a cutting portion (120), a depth gauge (118) and a space (122) between the cutting portion (120) and the depth gauge (118). The cutting chain (100) further includes a bumper drive link (104) which is pivotally connected to the cutting link (106) and immediately precedes the cutting link (106) in the cutting direction (124). The bumper drive link (104) further includes a tail (204) and a body (202). The tail (204) of the bumper drive link (104) further includes a bent portion (206) and a straight portion (208). Further, the bent portion (206) is oriented in a substantially perpendicular direction relative to a plane (P) of the body (202) of the bumper drive link (104). Moreover, the bent portion (206) of the tail (204) extends into the space (122) between the cutting portion (120) and the depth gauge (118) of the cutting link (106).
    Type: Application
    Filed: January 13, 2011
    Publication date: November 7, 2013
    Applicant: HUSQVARNA AB
    Inventors: Christian Drößler, Markus Maag
  • Patent number: 8146474
    Abstract: A quick change cutting link of a saw chain for cutting wood comprises a base member adapted to be pivotally connected to other links of the saw chain. The base member comprises a seat surface. A cutting member comprising a “V” notch releasably engages the seat surface of the base member. Attached to the “V” notch is a carbide tip, including a cutting edge. The carbide tip is accurately placed in the “V” notch by mating with a small piece of metal in the “V” notch. The carbide tip is then sinterbrazed to the cutting member. The cutting member and seat surface may also comprise an inverted L-shaped protrusion and the other includes an inverted L-shaped recess for receiving the inverted L-shaped protrusion. The inverted L-shaped protrusion and recess may be designed so as to form a wedge.
    Type: Grant
    Filed: May 22, 2008
    Date of Patent: April 3, 2012
    Assignee: Indigo Innovators, Inc.
    Inventor: David Szymanski
  • Patent number: 8037610
    Abstract: A powered vinyl groover includes a motor attached to a circular blade and a blade housing for covering the circular blade. The blade housing includes a duct to carry cuttings into a collection bag. Near an inlet hole of the duct is a fin, which may be a raised surface on any interior wall of the blade housing extending into the blade housing as close as possible to the blade. The fin causes airflow from the blade to be redirected towards the inlet hole of the duct so that more cuttings enter the duct and are carried by the duct through to an outlet hole to a collection bag mountable over the outlet hole of the duct. The fin may be integral with the blade housing or attached to it, and a fin may also be added to existing groovers.
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: October 18, 2011
    Assignee: Crain Cutter Co., Inc.
    Inventor: Gregory Joseph Chambers
  • Patent number: 8028610
    Abstract: A cutting link (1) for a saw chain includes a base body (2) and a cutting tooth (3) mounted thereon and made of hard metal. The base body (2) has rivet openings (4) and a recess (6) is formed in the base body (2) for chip removal with the recess (6) being ahead of the cutting tooth (3) in running direction. A connecting leg (8) of the cutting tooth (3) is brought into surface contact laterally of the base body (2) and the cutting tooth (3) is firmly bonded to the base body (2) by brazing. The connecting leg (8) extends so far downwardly that a lower edge (13) thereof lies lower than the recess (6). The connecting leg (8) has an upwardly raised edge (15) in its rearward region opposite the neighboring rivet opening (4).
    Type: Grant
    Filed: September 10, 2008
    Date of Patent: October 4, 2011
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Marco Kewes, Rainer Rühle, Manfred Vogler
  • Patent number: 8015715
    Abstract: A chain saw arrangement for cutting flat sides or kerfs on a round log or timber. The arrangement includes a chain saw housing at a first end of the chain saw. An elongated chain/blade supporting frame extends from the chain saw housing. A multi-tooth chain/blade is movably supported from the elongated frame. A support bracket is secured to one side of the elongated frame for providing restricted support of the chain/blade on a log or timber during cutting of a transverse kerf thereon.
    Type: Grant
    Filed: October 17, 2007
    Date of Patent: September 13, 2011
    Inventor: Robert L. Perkins
  • Publication number: 20110179652
    Abstract: The invention relates to a chipper chain (10) for a motor-driven chain saw (9) as well as a chain saw having such a chipper chain (10). The chipper chain (10) includes drive links (1), connecting links (2), and cutting links (3). The drive links (1) each have a drive projection (4). The cutting links (3) each have an upper cutting blade (5) and a depth limiter (6) which leads the upper cutting blade (5). The chipper chain (10) has a maximum width (A) which is defined by the upper cutting blades (5), a maximum height (C) which is measured perpendicularly to its longitudinal axis and extends from the drive projection (3) to the upper cutting blade (5), and an average divide (T) predetermined by the average distance of adjacent pivot pins (7). The product of the maximum width (A), the maximum height (C), and the average divide (T) is ?450 mm3. The driving power of the motor-driven chain saw (9) is ?1.0 kW.
    Type: Application
    Filed: January 28, 2011
    Publication date: July 28, 2011
    Inventors: Jan Föhrenbach, Jochen Buchholtz, Alexander Fuchs, Klaus Dussler
  • Publication number: 20110120280
    Abstract: An anti-kickback saw chain including a plurality of links each having an upstream end and a downstream end relative to a direction of travel of the chain is provided. The anti-kickback saw chain comprises a holding link having a first side and a second side, a replaceable tooth adapted to be removably mounted on the downstream end of the holding link, and a safety drive link. The upstream end of the safety drive link is pivotally connected to the downstream end of the first side of the holding link. The safety drive link includes a safety lobe effective to prevent the tooth from being dislodged from the holding link during chain travel, and a substantially flat upper edge.
    Type: Application
    Filed: November 16, 2010
    Publication date: May 26, 2011
    Inventor: David A. Szymanski
  • Publication number: 20100058915
    Abstract: A saw chain for a chain saw is disclosed. Embodiments include a drive link that may be used in a saw chain, wherein the drive link includes a tail and a concavity that complements a depth gauge of a trailing cutting link, reducing and/or minimizing the drive link's protrusion into a gullet space of the cutting link. Embodiments of the invention may help improve cutting performance and further help reduce kickback potential.
    Type: Application
    Filed: November 16, 2009
    Publication date: March 11, 2010
    Applicant: BLOUNT, INC.
    Inventors: Mike Goettel, Arlan Way
  • Publication number: 20100005666
    Abstract: Embodiments provide various components of a chain saw, including saw chain elements, sprockets, and other fixtures, that may facilitate sharpening of cutter links during operation. In various embodiments, the components may increase stability during sharpening, provide nose mounted sharpening fixtures, and/or facilitate the resizing and/or reshaping of a sharpening element.
    Type: Application
    Filed: June 25, 2009
    Publication date: January 14, 2010
    Applicant: BLOUNT, INC.
    Inventors: Chris Seigneur, Mike Goettel, Mike Harfst, Mike Patterson, Mark Schoening, Scot Pyle, Ian Osborne
  • Patent number: 7637192
    Abstract: A saw chain for a saw is disclosed. Embodiments include a drive link that may be used in a saw chain, wherein the drive link includes a tail and a concavity that complements a depth gauge of a trailing cutting link, reducing and/or minimizing the drive link's protrusion into a gullet space of the cutting link. Embodiments of the invention may help improve cutting performance and further help reduce kickback potential.
    Type: Grant
    Filed: October 23, 2007
    Date of Patent: December 29, 2009
    Assignee: Blount, Inc.
    Inventors: Mike Goettel, Arlan Way
  • Publication number: 20080098870
    Abstract: Embodiments include a drive link that may be used in a saw chain, wherein the drive link includes a tail and a concavity that help improve cutting performance while reducing kickback potential.
    Type: Application
    Filed: October 23, 2007
    Publication date: May 1, 2008
    Applicant: Blount, Inc., a limited liability company of Delaware
    Inventors: Mike Goettel, Arlan Way
  • Publication number: 20070169605
    Abstract: Safety chain and rotatable devices for saws include a plurality of base members on which sharp members are retained. The sharp members include sintered particulate material such as tungsten carbide, which has high particle hardness. The base members are formable from sintered particulate material. The sharp members to be formed by powder metal molding, metal injection molding or investment casting to provide the protrusion and recess with a final net shape. The cutting member is one, two or more pieces, and is permanently bonded to or removably disposed on the base member. Bonding material or fasteners can connect the cutting member to the base or a tip to an insert body; bonding material includes cement, solder, braze and polymer. Safety lobes prevent the teeth from being dislodged.
    Type: Application
    Filed: August 19, 2006
    Publication date: July 26, 2007
    Inventor: David A. Szymanski
  • Patent number: 6871573
    Abstract: 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 cutter link has a cutter tooth and a leading depth limiter, whereby the safety link is provided with a projecting nose for support against the base of a cut. The nose extends in the direction toward the depth limiter. The safety link is provided with a side portion disposed in front of the nose. The side portion has an elevated contact surface, which, when the saw chain is curved in the reversing region, is disposed on the path of a top cutting edge of the cutter tooth, and when the saw chain is extended reaches at least nearly to the height of the depth limiter.
    Type: Grant
    Filed: April 15, 2003
    Date of Patent: March 29, 2005
    Assignee: Andreas Stihl AG & Co. KG
    Inventor: Harald Mang
  • Patent number: 6857349
    Abstract: A safety saw chain for chain saw and more particularly to the configuration of drive links and cutter links so as to get a high cutting power, to decrease the vibration, kickback, and the friction of the saw chain on the guide bar.
    Type: Grant
    Filed: January 4, 2002
    Date of Patent: February 22, 2005
    Inventor: Germain Duquet
  • Patent number: 6837138
    Abstract: A saw chain for a motor-driven chain saw (1) is formed from center drive links (10) and lateral connecting links (11). A first radius (18) is the maximum distance of the axis (22) of the leading rivet opening (12) to the region (19) facing toward the forward running surface and lying in the running direction. A second radius (20) defines the maximum distance from the axis (23) of the trailing rivet opening (13) of the connecting link (11), which is next adjacent in the running direction (8), to the region (21) of the connecting link (11). The region (21) lies facing toward the rearward running surface (17) opposite to the running direction (8). The second radius (20) is greater than the first radius (18) and the sum of first radius (18) and second radius (20) corresponds approximately to the distance (b) of the axes (26, 27) of the rivet openings (24, 25) of a drive link (10) arranged between the connecting links (11).
    Type: Grant
    Filed: March 3, 2003
    Date of Patent: January 4, 2005
    Assignee: Andreas Stihl AG & Co. KG
    Inventor: Harald Mang
  • Patent number: 6748840
    Abstract: A saw chain for a chain saw including alternating center and side link pairs with certain of said side links being cutting links and certain of said center links preceding said cutting links having guard portions to inhibit kick back. Said guard portions including a forward and rearward guard portion, the rearward guard portion in overlapping relation with a depth guide of the cutting link. A relief spacing between the guard portions facilitates chip carriage and the guard portions cooperatively form a ramp to guide wood being cut over and onto the depth gauge for controlling the depth of cut taken by the cutting link.
    Type: Grant
    Filed: August 7, 2002
    Date of Patent: June 15, 2004
    Assignee: Blount, Inc.
    Inventor: Michael D. Harfst
  • Publication number: 20030192418
    Abstract: 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 cutter link has a cutter tooth and a leading depth limiter, whereby the safety link is provided with a projecting nose for support against the base of a cut. The nose extends in the direction toward the depth limiter. The safety link is provided with a side portion disposed in front of the nose. The side portion has an elevated contact surface, which, when the saw chain is curved in the reversing region, is disposed on the path of a top cutting edge of the cutter tooth, and when the saw chain is extended reaches at least nearly to the height of the depth limiter.
    Type: Application
    Filed: April 15, 2003
    Publication date: October 16, 2003
    Applicant: Andreas Stihl AG & Co. KG
    Inventor: Harald Mang
  • Publication number: 20030154841
    Abstract: A bimetal saw band which is suitable for cutting materials of high hardness and wear resistance at high cutting speeds and with a reduced consumption of coolant comprises a support band which comprises from 0.20 to 0.45% of carbon, from 0.2 to 0.6% of silicon, from 0.5 to 1.8% of manganese, from 0.1 to 3.5% of molybdenum, from 1.0 to 5.0% of chromium, from 0.5 to 1.5% of nickel, from 0.1 to 1.0% of copper, from 0.1 to 2.0% of tungsten, from 0.1 to 0.5% of vanadium, from 0.01 to 0.30% of niobium and/or tantalum and less than 0.2% of cobalt, remainder iron including melting-related impurities, with the tungsten, vanadium and niobium/tantalum contents matched to one another, and hard-metal tips comprising at least 75% of tungsten carbide and 5 to 15% of cobalt, as well as grain stabilizers with a grain size of less than 5 &mgr;m.
    Type: Application
    Filed: January 23, 2003
    Publication date: August 21, 2003
    Inventors: Oskar Pacher, Werner Lenoir
  • Publication number: 20030126952
    Abstract: The present invention is a method of producing chainsaw chain allowing to increase the effectiveness of the woodcutter in modifying the cutter links and some safety links.
    Type: Application
    Filed: January 4, 2002
    Publication date: July 10, 2003
    Inventor: Germain Duquet
  • Patent number: 6446534
    Abstract: A cutter device has a cutter portion which is led by a depth gauge. The depth gauge is mounted on and extends upwardly from a substantially planar main body section. The depth gauge has a forward, or first section which extends upwardly from the main body, and when viewed from above is disposed at an angle relative to the central plane of the main body diverging therefrom on progressing rearwardly. The rear end of the first section is connected at a juncture section to a second section which progresses rearwardly and is disposed at an angle converging toward the central plane. The second section may extend across the plane of the body and diverge from the opposite side thereof on progressing rearwardly. The upper surface of the depth gauge presents a sweeping curve as viewed from the front of the cutter which is a multiple of the thickness of the body to which it is attached to provide effective cut control for the following cutter.
    Type: Grant
    Filed: April 28, 2000
    Date of Patent: September 10, 2002
    Assignee: Blount, Inc.
    Inventor: Michael D. Harfst
  • Patent number: 6435070
    Abstract: A saw chain formed in part from planar cutting link blanks including a cutter portion having a top edge surface and a side surface that intersect to form a line edge. A leading portion of the cutting link blank is twisted out of the plane of the blank so that the line edge becomes the cutting edge of the cutter and extends from the plane of the body to encompass the width of one side of the saw chain. Alternating cutting link are formed to have oppositely extended cutting edges to encompass the width of the saw chain. The cutting links preferably form certain of the center links of an assembled saw chain.
    Type: Grant
    Filed: March 22, 2001
    Date of Patent: August 20, 2002
    Assignee: Blount, Inc.
    Inventor: Johann Weber
  • Patent number: 6374716
    Abstract: A high speed harvester cutting chain has increased cutter height to provide an increased space for removal of the cut material from the saw kerf. The increased height of the cutter links eliminates the compacting of the material cut away by the cutter links between the saw chain and the base of the saw kerf. The foot of the cutter links are flared outward to contact the guide bar rails at a different position than the tie straps to increase the wear life of the guide bar and saw chain.
    Type: Grant
    Filed: February 29, 2000
    Date of Patent: April 23, 2002
    Assignee: Blount, Inc.
    Inventors: Johann Weber, Michael J. Patterson, Arvin A. Hille
  • Patent number: 6308606
    Abstract: The invention is directed to a saw chain for a motor-driven chain saw comprising center drive links and lateral connecting links which are pivotally connected to each other via rivets lying transversely to the longitudinal direction of the chain. Individual connecting links are configured as cutting links and have a cutting tooth with a roof bent over toward the chain center. The roof has a leading edge and a trailing edge which lie each transverse to the longitudinal direction of the chain. The leading edge is configured as a roof cutting edge and lies higher than the trailing edge which lies at a spacing above a depression. The depression is formed in the region between the rivet holes in the adjacent upper edge of the drive link and delimits a chip channel. The recess is formed asymmetrically on a drive link with respect to the center perpendicular of an imaginary connecting line between the center points of the rivet holes.
    Type: Grant
    Filed: September 27, 1999
    Date of Patent: October 30, 2001
    Assignee: Andreas Stihl AG & Co.
    Inventors: Jochen Buchholtz, Bernd Andress
  • Patent number: 6058825
    Abstract: A cutter device has a cutter portion which is led by a depth gauge. The depth gauge is mounted on and extends upwardly from a substantially planar main body section. The depth gauge has a forward, or first section which extends upwardly from the main body, and when viewed from above is disposed at an angle relative to the central plane of the main body diverging therefrom on progressing rearwardly. The rear end of the first section is connected at a juncture section to a second section which progresses rearwardly and is disposed at an angle converging toward the central plane. The second section may extend across the plane of the body and diverge from the opposite side thereof on progressing rearwardly. The upper surface of the depth gauge presents a sweeping curve as viewed from the front of the cutter which is a multiple of the thickness of the body to which it is attached to provide effective cut control for the following cutter.
    Type: Grant
    Filed: March 6, 1997
    Date of Patent: May 9, 2000
    Assignee: Blout, Inc.
    Inventor: Michael D. Harfst
  • Patent number: 6021826
    Abstract: A plate-joinery system includes a chain-saw plate joiner where the cutting mechanism includes a cutting-chain driven about a saw-bar. The cutting mechanism of the chain-saw plate joiner may be advanced on rails to one of a set of predetermined depths. The increased recess depth allowed by the chain-saw and the resultant increase in both glueable surface area and mechanical engagement permit high-strength right-angle joints to be made with the speed of conventional plate-joinery. Plate-joints of more conventional proportion may also be made. The plate joinery system also includes specialty plate configurations and compatible fasteners that permit many joints to be rapidly assembled without resort to either manual glue application or external clamps. A series of high-precision, low-friction cutting devices suitable for general introduction is also described.
    Type: Grant
    Filed: May 19, 1998
    Date of Patent: February 8, 2000
    Inventor: Stephen S. Daniell
  • Patent number: 6006629
    Abstract: A saw chain is automatically sharpened during use by causing top sides of the cutter links to be pressed against a stationary abrasive block when the saw chain is running around a rim type sprocket. The cutting link includes a cutting edge, and a depth gauge recessed radially from the cutting edge by a distance defining the cutting depth. The generally cylindrical outer periphery of the drive sprocket has raised steps or ramps formed thereon which lift the front end of the cutter links relative to the rear ends, thereby allowing a sufficiently large cutting depth to be achieved without locating the depth gauge far in front of the front rivet. This reduces vibration and instability of the saw chain when sawing.
    Type: Grant
    Filed: June 25, 1998
    Date of Patent: December 28, 1999
    Assignee: Sandvik Aktiebolag
    Inventor: Per-Olof Lofgren
  • Patent number: 5988035
    Abstract: A sawing chain for chain saws, having a plurality of chain links which are linked together so as to be mutually pivotable in a common plane of extent and advance (which plane is in the operating plane of the chain) and which links bear cutting elements. To facilitate replacement of damaged individual links, and to simplify the driving and guiding of the chain, the chain links are linked together in succession in a direct intermeshing fashion i.e. not relying on fasteners to mediate the linkage of the successive chain links, along edge surfaces which extend transversely to the common plane of extent and advance (which plane is in the operating plane of the chain), resulting in a chain structure which is resistant to flexure in the direction perpendicular to the plane.
    Type: Grant
    Filed: May 5, 1997
    Date of Patent: November 23, 1999
    Assignee: Hard-Stiftung
    Inventor: Christoph Rossmann
  • Patent number: 5974933
    Abstract: A depth gauge leading the cutting edge in a cutter device has a body portion disposed in a substantially upright plane. The depth gauge includes a top plate portion cantilevered laterally over the body. A juncture section joins the depth gauge plate portion to the body of the cutter and is deformed intermediate its front and rear ends to strengthen the depth gauge against breakage.
    Type: Grant
    Filed: May 5, 1997
    Date of Patent: November 2, 1999
    Assignee: Blount, Inc.
    Inventors: James O. Burrows, Randall D. Jensen, Kent L. Huntington, Robert J. Penberthy
  • Patent number: 5740715
    Abstract: A cutter for an endless cutter device having a body portion disposed in a substantially upright plane, a cutter portion on a rearward region of the body and a depth gauge portion on a forward region of the body. The depth gauge has a downwardly sloping planar upper surface with a multi-angular configuration. A rear edge of the depth gauge has a central portion which is highest and farthest to the rear, with side portions extending forwardly and downwardly therefrom in diverging directions. A free outer edge intermediate the rear edge and forward edge of the depth gauge is the maximum width portion of the depth gauge. Converging edges progress forwardly from the maximum width portion to the front edge of the depth gauge. The heel of the body portion is clipped to permit limited rearward rocking of the cutter.
    Type: Grant
    Filed: April 28, 1997
    Date of Patent: April 21, 1998
    Assignee: Blount, Inc.
    Inventors: James O. Burrows, Randall D. Jensen, Kent L. Huntington
  • Patent number: 5666871
    Abstract: A cutter for an endless cutter device having a body portion disposed in a substantially upright plane, a cutter portion on a rearward region of the body and a depth gauge portion on a forward region of the body. The depth gauge has a downwardly sloping planar upper surface with a multi-angular configuration. A rear edge of the depth gauge has a central portion which is highest and farther to the rear, with side portions extending forwardly and downwardly therefrom in diverging directions. A free outer edge intermediate the rear edge and forward edge of the depth gauge is the maximum width portion of the depth gauge. Converging edges progress forwardly from the maximum width portion to the front edge of the depth gauge. The heel of the body portion is clipped to permit limited rearward rocking of the cutter.
    Type: Grant
    Filed: November 14, 1994
    Date of Patent: September 16, 1997
    Assignee: Blount, Inc.
    Inventors: James O. Burrows, Randall D. Jensen, Kent L. Huntington
  • Patent number: 5172619
    Abstract: A saw chain made according to the present invention includes cutter teeth having a single slicer. Sequentially, the cutter tooth having a slicer on the left-hand side is followed by a raker tooth having an open face on the left-hand side. A cutter tooth having a single slicer on the right-hand side is followed by a raker tooth having an open face on the right-hand side. The wood is cut sequentially by the left-hand slicer, the raker tooth having an open face on the left-hand side, the right-hand slicer and the raker tooth having an open face on the right-hand side. The particular sequence of cutting provides a fast and smooth cut that avoids binding in the kerf. Alternatively, the cutter tooth having a single slicer on the left-hand side may sequentially follow a cutter tooth have a single slicer on the right-hand side. A raker tooth having a full-width raker may follow the sequential cutter teeth or two raker teeth having respective half-width rakers may follow.
    Type: Grant
    Filed: December 11, 1991
    Date of Patent: December 22, 1992
    Inventor: Gerald C. Kolve
  • Patent number: 5165318
    Abstract: A saw chain is composed of a plurality of cutter links, each link comprising a cutter part and a depth gauge located ahead of the cutter part. The links are designed to enable a cutting edge of the cutter part to be resharpened without having to remove the entire top surface of the depth gauge, and without changing the geometry of the link to such an extent as would result in significantly different cutting characteristics.
    Type: Grant
    Filed: September 25, 1990
    Date of Patent: November 24, 1992
    Assignee: Sandvik AB
    Inventor: William W. Wesley
  • Patent number: 5092211
    Abstract: A saw chain is disclosed which includes cutting links having a central pivot on the bottom or inner edge of such cutting link which contacts the track of a saw bar on which the chain is mounted. A front foot portion and a rear foot portion which extend from the central pivot to the front end and the rear end, respectively, of the cutting link are normally spaced from such track when it is not cutting. The cutting link tilts about the pivot rearwardly and forwardly during cutting to provide a smooth rocking motion which reduces vibration and injury to the operator. One embodiment of the cutting link employs a single pivot located centrally between the front rivet opening and rear rivet opening. Another embodiment of the cutting link employs two pivots which are spaced apart and are both located centrally between the front and rear rivet openings. The saw chain includes side cutting links and side tie strap links connected by rivets to central drive links.
    Type: Grant
    Filed: September 6, 1991
    Date of Patent: March 3, 1992
    Assignee: Blount, Inc.
    Inventors: Michael V. Petrovich, Donald J. MacGavin
  • Patent number: 5085113
    Abstract: Circular brush cutting blade for powered brush cutter has cutting teeth arranged in pairs on periphery of blade, the teeth in pairs being of alternate right and left configuration and closely spaced together, the pairs of teeth being relatively widely spaced apart on the blade. Means are provided to engage the kerf sides and deflect the blade toward its central plane as it engages the material being cut.
    Type: Grant
    Filed: January 3, 1991
    Date of Patent: February 4, 1992
    Inventor: J. Dana Pinney
  • Patent number: 5065658
    Abstract: A cutter link where the top plate and the side plate of the cutter in the link join through an inclined transition region, and a planar bevel surface produces a cutting edge which extends along the top plate and through the transition region.
    Type: Grant
    Filed: June 22, 1990
    Date of Patent: November 19, 1991
    Inventor: Lynn J. Ziegelmeyer
  • Patent number: 5056395
    Abstract: A cutter link for a chain saw chain containing a conical raker spaced forward of a round cutter face. The raker protects most of the cutter face from sudden impact and, together with the cutting and rake angles of the cutter face, provides for a filing rather than a chiseling action by the cutter link. Saw chains incorporating the novel cutter link are impact and wear resistant.
    Type: Grant
    Filed: January 24, 1990
    Date of Patent: October 15, 1991
    Assignee: Sovac Corporation
    Inventors: Milos Sovak, Robert A. Rauch
  • Patent number: 5042350
    Abstract: The invention is directed 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 direction. The saw chain includes: a plurality of cutting links, a plurality of driving links and a plurality of connecting links, the links being pivotally interconnected by rivets or the like to define the saw chain. The cutting links have respective cutting teeth disposed at a pregiven elevation above the guide bar. A plurality of non-cutting riders are mounted on selected ones of the links so as to be at an elevation corresponding approximately to the elevation of the cutting teeth for visibly marking the movement of the saw chain around the guide bar.
    Type: Grant
    Filed: September 5, 1989
    Date of Patent: August 27, 1991
    Assignee: Andreas Stihl
    Inventor: Karl Nitschmann
  • Patent number: 5029501
    Abstract: A faster more efficient cutter link for a saw chain is provided by contouring the toe portion to have several cutting edges spaced apart by non-cutting areas so that smaller chips are formed which can be more easily broken up and moved from the saw kerf. The cutting surfaces can be arcuate or linear and can extend all the way across the saw kerf or only part way, depending upon the particular configuration desired.
    Type: Grant
    Filed: July 11, 1990
    Date of Patent: July 9, 1991
    Inventor: Wayne A. Smith
  • Patent number: 4979416
    Abstract: The invention is directed to a cutting link for a saw chain of a motor-driven chain saw. Since the cutting links of the saw chain wear differently at the forward and rearward running surfaces, the cutting link tilts in a direction opposite to the direction of movement of the saw chain whereby a free angle conjointly defined by the roof of the cutting tooth and the cutting plane becomes larger. However, a larger free angle changes the cutting performance of the saw chain. In order to obtain an approximately uniform cutting performance over a longer period of operational use, the tooth roof can be configured over its length to define free angles which become smaller whereby the enlargement of the free angle occurring during the tilting of the cutting link caused by wear is compensated.
    Type: Grant
    Filed: May 16, 1989
    Date of Patent: December 25, 1990
    Assignee: Andreas Stihl
    Inventor: Karl Nitschmann
  • Patent number: 4911050
    Abstract: The invention is directed to a saw chain for a motor-driven saw such as a handheld, portable motor-driven chain saw. The motor-driven saw has a guide bar defining a track for accommodating and guiding the saw chain in a predetermined direction of movement. The saw chain includes a plurality of cutting links, a plurality of connecting links and a plurality of driving links, the links being pivotally interconnected by rivets or the like to define the saw chain. Each of the cutting links includes a plate-like body having a base web for defining rearward and forward openings for receiving respective ones of two of the rivets therein. The plate-like body has a rearward portion extending upwardly from the rearward region of the base web to define a cutting tooth. The plate-like body has a forward portion extending upwardly from the forward region of the base web so as to be spaced from the cutting tooth.
    Type: Grant
    Filed: August 12, 1988
    Date of Patent: March 27, 1990
    Assignee: Andreas Stihl
    Inventor: Karl Nitschmann
  • Patent number: 4898057
    Abstract: A center drive cutter chain for mounting on a cutter bar. The chain comprises center drive cutter links having forward and rearward pivot openings and pairs of oppositely disposed side links pivotally interconnected by pins to the cutter links and alternating non-cutter drive links. The side links each have forward and rearward pivot openings and forward and rearward bar engaging undersides. For the side links following a center drive link, the width of each side link between its forward pivot opening and forward bar engaging underside is less than the width between its rearward pivot opening and rearward bar engaging underside. When the axes of the pins extending through the pivot openings of the cutter links and following side links are substantially in a plane, the forward bar engaging undersides of the side links are spaced apart from the adjacent side rails of the bar.
    Type: Grant
    Filed: June 13, 1989
    Date of Patent: February 6, 1990
    Assignee: Blount, Inc.
    Inventor: Arvin A. Hille
  • Patent number: 4873903
    Abstract: Saw chain is assembled with wear links for improving the resistance of saw chain to abrasion from the saw bar. In one embodiment, the wear links are mounted one beside each steel side link in the chain and are constructed to ride along the outer surfaces of the pair of parallel rails upon which the side links also ride as the chain is driven around the bar. The wear links, however, are formed of a material that better resists abrasion than steel but consequently has less tensile strength. To assure that the tensile load on the chain is assumed by the steel side links while the chain is supported on the bar by the wear links, the wear links have oblong pin openings of the same height but of greater length than the circular openings of the side links. In a second embodiment, the wear links are mounted on both sides of each drive link rather than beside each side link.
    Type: Grant
    Filed: July 7, 1988
    Date of Patent: October 17, 1989
    Assignee: Blount, Inc.
    Inventor: Michael D. Harfst
  • Patent number: 4841825
    Abstract: A cutting link for a saw chain useful in heavy workload operations includes spaced-apart longitudinally-extending planar side portions adapted to straddle a guide bar support and a cutting element mounted on one of the side portions and extending toward the other side portion, the side portions being connectable to other links in the chain. A cross piece interconnects the side portions forwardly of the cutting element. The cross piece forms with the side portions a continuous U-shaped zone which defines a depth gauge to determine the depth of cut of the cutting element. A depending nose tab integral with the cross-piece serves to close off a portion of the forward open channel between the planar side portions to minimize accumulation and packing of sawdust under the U-shaped zone.
    Type: Grant
    Filed: June 10, 1988
    Date of Patent: June 27, 1989
    Assignee: Blount, Inc.
    Inventor: Kenneth B. Martin
  • Patent number: 4813323
    Abstract: A link for a chain has a first planar portion and a second portion integral with and disposed adjacent the first portion, the second portion being folded over to form a bight having a pair of parallel, laterally-spaced opposed walls defining a space therebetween and adapted to receive a first portion of an adjacent link.
    Type: Grant
    Filed: August 18, 1987
    Date of Patent: March 21, 1989
    Assignee: Blount, Inc.
    Inventor: Michael D. Harfst
  • Patent number: 4796360
    Abstract: For motor-driven chain saws, there is the danger that the chain saw will be kicked back if the reaction forces suddenly increase intensely in response to the forward thrust. This kickback effect and the danger of accident associated therewith are intended to be reduced by means of a special configuration of the saw chain. The saw chain has drive links which have an approximately triangular shape and which engage the tooth gaps of the nose sprocket with inclined flanks. The drive links are configured to be asymmetrical with respect to a partition line running between the two pivot axes of the link so that the forward flank angle is greater than the rearward flank angle referred to the partition line. The two flank angles together are greater than the opening angle of the V-shaped tooth gap of the nose sprocket.
    Type: Grant
    Filed: October 29, 1987
    Date of Patent: January 10, 1989
    Assignee: Andreas Stihl
    Inventors: Manfred Fischer, Klaus Dussler, Wilfried Linke, Werner Hartmann
  • Patent number: 4796502
    Abstract: A chain saw blade having a plurality of linked cutting segments having serrated or saw teeth on the cutting edge is provided with depth-control surfaces parallel to the plane of the peaks of the teeth to limit the depth of penetration of the teeth. At the leading end of the leading depth-control surface there is a canted portion which slopes to the end edge of the segment to a point essentially coincident with the plane of the valleys of the teeth.
    Type: Grant
    Filed: August 26, 1987
    Date of Patent: January 10, 1989
    Assignee: Pro Power Corporation
    Inventor: Harvey G. Anderson
  • Patent number: RE37288
    Abstract: A cutter for an endless cutter device having a body portion disposed in a substantially upright plane, a cutter portion on a rearward region of the body and a depth gauge portion on a forward region of the body. The depth gauge has a downwardly sloping planar upper surface with a multi-angular configuration. A rear edge of the depth gauge has a central portion which is highest and farther to the rear, with side portions extending forwardly and downwardly therefrom in diverging directions. A free outer edge intermediate the rear edge and forward edge of the depth gauge is the maximum width portion of the depth gauge. Converging edges progress forwardly from the maximum width portion to the front edge of the depth gauge. The heel of the body portion is clipped to permit limited rearward rocking of the cutter.
    Type: Grant
    Filed: September 1, 1999
    Date of Patent: July 24, 2001
    Assignee: Blount, Inc.
    Inventors: James O. Burrows, Randall D. Jensen, Kent L. Huntington