Abstract: A chainsaw includes a housing, a motor, a bar fixedly coupled to the housing and configured to form a cutting track, a cutting implement configured to move along the cutting track and drivable by the motor, and a tensioning system configured to adjust tension in the cutting implement.

Abstract: A band saw machine has two deflection pulleys arranged one above the other in the vertical direction, an endless saw band, which is guided around the deflection pulleys and which has an upward running portion and a downward running portion, and a machine frame, which has a saw neck for holding at least the upper deflection pulley. The deflection pulleys are arranged substantially parallel to a front edge of the machine frame, so that both the upward running portion and the downward running portion of the saw band face towards the front edge with their cutting edges. The saw neck is arranged offset from the deflection pulleys from the front edge (6) to the rear. Both the upward running portion and the downward running portion of the saw band are at least partially exposed between the deflection pulleys.

Abstract: A guiding device for a saw band or a sawblade of a sawing machine is provided, which has at least one holder with at least one gliding part and/or at least one roll for an at least temporary gliding and/or rolling contact with the saw band or sawblade. The at least one gliding part and/or the at least one roll is provided on the holder in a movable fashion in reference to the holder, with the at least one gliding part and/or the at least one roll being movable in reference to the holder via at least one piezo-actuator, essentially perpendicular to the direction of movement of the saw band or sawblade. A sawing machine with such a guiding device is also provided.

Abstract: A quick change chain saw system includes a swing arm and a hydraulic clamp device. The swing arm extends from the hydraulic clamp device. The swing arm retains drive sprocket components and is retained by a tree harvester or wood processor unit. The hydraulic clamp device includes a hydraulic clamp block, a puck plate, a clamp plate and a detent pin. The puck plate includes a base plate and three stud projections that is actuated with a plurality of pucks in the hydraulic clamp block. Three stud projections extend from the base plate and are inserted through the hydraulic clamp block. The clamp plate is secured to the three stud projections. A spring tensioner is used to bias the chain bar. A retraction tool is used to retract the hydraulic clamp device. The detent pin is used keep the hydraulic clamp in a retracted position for changing the chain blade.

Abstract: A tensioning mechanism for a band saw includes a tension spring assembly coupled with a sliding tension bracket which is adjustably coupled with an upper arm of the band saw. The sliding tension bracket engages an upper band wheel which couples with a band saw blade. A cam assembly is coupled with the tension spring assembly, the cam assembly imparts a rotational force which is translated into a linear tensioning force by the tension spring assembly upon the band saw blade. A cover assembly is selectively engaged with the cam assembly through use of a biasing assembly. The cover assembly includes an index indicator for identifying an index position and includes a handle which enables a user to selectively engage and rotate the cover assembly. The rotation of the handle in turn rotates the cam assembly applying the rotational force which is translated into the tensioning force.

Abstract: A pallet dismantler includes a frame, a first drive roller rotatably coupled to the frame, and an arm pivotably coupled to the frame. A sleeve member is rigidly coupled to the arm. An axle extends from the sleeve. A second drive roller is rotatably coupled to the axle. An adjustable ratchet member extends between the arm and the frame. The adjustable ratchet member is operable to adjust the position of the second driver roller relative to the first drive roller. A blade member is trained on the first and second drive rollers.

Abstract: A band saw machine is provided with a body frame, two wheels provided on the body frame and rotating by driving force on an inclined plane which is inclined to a basic plane which is flush with a cutting plane, a saw blade formed in loop and strained between the two wheels, a stabilizing member bringing a portion of the saw blade which runs around a cutting section which is fixed between the wheels and on an edge intersected the inclined plane with the basic plane close to the basic plane in near-parallel, and a depressing mechanism fixed up adjacent to the cutting section side of the stabilizing member to clear the gap between the saw blade and the basic plane. The band saw machine, for example in a ship on building, can finely cut a protrusion on a floor of a bottom to its root to remove it. Thus, an extra effort to smooth a floor can be saved.

Abstract: A tensioning mechanism for a band saw comprises a tension spring assembly coupled with a sliding tension bracket which is adjustably coupled with an upper arm of the band saw. The sliding tension bracket engages an upper band wheel which couples with a band saw blade. A cam assembly is coupled with the tension spring assembly, the cam assembly imparts a rotational force which is translated into a linear tensioning force by the tension spring assembly upon the band saw blade. A cover assembly is selectively engaged with the cam assembly through use of a biasing assembly. The cover assembly includes an index indicator for identifying an index position, corresponding with the width of the band saw blade, of the cover assembly relative to the cam assembly. The cover assembly includes a handle which enables a user to selectively engage and rotate the cover assembly. The rotation of the handle in turn rotates the cam assembly applying the rotational force which is translated into the tensioning force.

Abstract: A belt saw machine includes an upright base frame, a cutter unit, a roller mounting arm, a biasing unit, and a pushing unit. The upright base frame has upper and lower frame portions. The cutter unit includes an upper drive roller, a lower drive roller, and a belt cutter. The roller mounting arm is pivoted to the upper frame portion, and has the upper drive roller mounted rotatably thereon. The biasing unit acts on the roller mounting arm for pivoting the roller mounting arm from a belt-slackening position to a belt-tightening position. The pushing unit is mounted movably on the upper frame portion, and is operable so as to apply a pushing force on the roller mounting arm for moving the roller mounting arm from the belt-tightening position to the belt-slackening position against action of the biasing unit.

Abstract: 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 arranged at a saw bar to interact with the holder (1). The guiding part (7) is permanently attached to resist turning and axially displaceable in relation to the holder (1) in the longitudinal direction (8) of the saw bar to allow stretching of a saw chain running round the saw bar (6) and the driving wheel (3). The stretching device for a saw chain is arranged to be active between the holder (1) and the guiding device (7) and including a hydraulically influenced piston (10). The piston (10) is arranged in a displaceable manner at the holder in parallel with the longitudinal direction (8) of the saw bar and has an engaging surface (11) intended to engage an opposing surface (12) on the guiding part (7).

Abstract: A band sawing machine has a band saw which runs on a drive wheel and a driven wheel of the band sawing machine. The band sawing machine is provided with a slide seat to which the driven wheel is pivoted. The band sawing machine is provided with an eccentric wheel in contact with the slide seat. The eccentric wheel is turned to bring about a change in diametrical distance, thereby resulting in the up-and-down movement of the slide seat. The distance between the drive wheel and the driven wheel is thus shortened to facilitate the replacing of the band saw.

Abstract: A saw blade adjusting device of a band sawing machine includes an urging seat, an urging knob, an adjusting knob, a sliding seat, and a wheel frame. The urging seat has projections and depressions at a top end thereof, and the urging knob has urging portions projecting from a bottom side of an inner top end thereof, whereby the rotary adjusting motion of the urging knob is translated into an axial reciprocating urging motion. The relative abutment and separation of the urging knob and the urging seat is utilized to achieve tightening and positioning of a saw blade so that the tension of the saw blade and the distance between upper and lower wheel frames during violent cutting operation can be maintained stably to enhance the quality and efficiency of the cutting operation.

Abstract: A table top band saw that is almost entirely assembled of molded plastic components to provide for ease of manufacture and assembly. The band saw includes a plastic housing enclosing a pair of opposed plastic wheels that are configured to allow for rotation of an endless saw blade. A plastic work table is secured to the housing such that the saw blade travels through the table and provides a location for supporting and sawing a work piece. An extended blade guide including a metal insert, is secured to the table to provide stabilization of the blade at the location where the work piece is being cut. A stabilizer and water feed device is positioned above the table, and allows a cooling fluid to flow onto the blade without dripping. A single piece plastic blade tensioning device is secured to posts extending from the housing adjacent to a top wheel. The blade tensioning device includes a shaft on which the top wheel is rotatably secured.

Abstract: A band saw for cutting animal carcasses and the like includes a housing and a lid rotatably connected therewith for movement between open and closed positions. Within the housing are provided a pair of pulleys for supporting a cutting band. Guides are provided adjacent the pulleys to twist the band 90.degree. to define a cutting segment thereof. Each guide includes a first guide member connected with the housing and a second guide member connected with the lid and defining a gap for receiving the band when the lid is closed. When the lid is opened, the second guide member is remotely positioned form the first guide member, thereby providing easy access to the band for replacement thereof.

Abstract: A sawmill includes a band saw mounted on a trolley. The trolley carries the band saw back and forth across the length of a log to cut it into boards. A log supporting table is adjustable to accomodate logs of various size. The trolley rails descend incrementally after each cut to reposition the band saw blade for the next cut. The length of each increment, or board thickness, is user selectable by way of an indexable detent bar and limit switch combination. The thickness across the board is held uniform by a pressurized bellows that maintains the proper blade strain in the band saw blade.

Abstract: A quick action band saw blade tensioning device is disclosed. The band saw blade tensioning device is used in a band saw machine having at least upper and lower band saw supporting wheels operatively rotatably mounted to a supporting frame. The band saw blade tensioning device includes a wheel support pivotally mounted to the supporting frame about a wheel support pivotal mount, one of the upper and lower band saw supporting wheels being rotatably mounted to the wheel support about a wheel support rotatable mount, and an adjustable device for pivotally moving the wheel support and its rotatably mounted band saw about the wheel support pivotal mount so as to apply a greater or lesser tensioning force to the band saw as desired. The adjustable device includes an elongated wire spring which is attached to the pivoting wheel support to provide the desired tensioning force to the band saw blade. Tension is maintained by clamping the deflected spring into place.

Abstract: A saw-blade tensioning arrangement for band saw and like machines which includes a hydraulic cylinder (6) having arranged for movement therein a piston (7) which is intended to activated saw-blade tension control means (2). The blade tension is, in this way, dependent on the hydraulic pressure in the cylinder. The arrangement includes means for pneumatically regulating the hydraulic pressure, these means including a pneumatically operated pressure booster (10) and means (19, 20, 35) for activating the pressure booster at the end of a working stroke of the hydraulic piston, therewith to tension the saw blade to the desired working tension, this working tension being determined, inter alia, by the blade width.

Abstract: An improved design for a band saw comprises a four wheeled blade guide with a pivotal spring-biased tensioning means and an emergency cut off switch that is actuated upon blade breakage.A band saw comprising of pivot mounted frame as to achieve a parallel swinging motion. Said frame having affixed in a precise position a power isolating assembly. An improvement for compactness and relatively cheaper to manufacture.

Abstract: An elongated stamped sheet-metal slider member facilitates the alinement and support for the guiding pulley of a band saw. The slider member has several integrally-formed portions. A first portion depends within the housing, and the pulley is rotatably supported thereon about an axis substantially perpendicular thereto. A second portion of the slider member is bent away, forming an obtuse angle with the first portion, and extends through a slotted opening formed in the housing. This second portion has a pair of ears projecting laterally of the slotted opening for preventing the slider from passing completely into the housing. The ears have respective side edge portions engaging the outer surface of the housing and forming therebetween a fulcrum for pivotal movement of the slider member and hence the pulley about an axis which is above the pulley axis and transverse thereto. A jack screw is carried by the housing for engaging the first portion of the slider member below the pulley axis.

Abstract: A chain saw guide bar assembly (30) having improved automatic chain tensioning, vibration damping and lubrication properties, and related lubrication methods are provided. A nose guide member (34) rotatably carrying an idler sprocket (34.1) is mounted to an elongate primary guide bar member (32) for reciprocal longitudinal movement relative thereto. Biasing spring members (50, 51) acting on force-imparting surfaces (60.4, 60.5), are protectively enclosed within an internal cavity (33) of the primary guide member and bias the nose guide member with predetermined tensioning force in the longitudinal direction against an endless cutting chain (40). An interchangeable force block member (60) enables preselection of the desired chain tension force. Damping finger members (32.35, 32.36, 50, 51) cooperatively absorb vibratory forces transmitted through the guide bar. Oil passageways (32.33, 32.

Abstract: A combined tensioning and tracking assembly is provided for use with band saw tools. A continuous saw band is supported by three spaced-apart pulleys. A bar, supporting one of the pulleys, is mounted for sliding and tilting movement, with the sliding movement providing adjustment in the tension of the saw band, and the tilting movement providing adjustment in the "tracking" of the saw band. The sliding movement of the bar is accomplished through an overcenter arrangement which tensions and releases the saw band. The bar, over center arrangement, and structure for achieving sliding and tilting movement of the bar, are all attached to a bracket which is mounted on the frame of the band saw tool.

Abstract: A bandmill has a frame, first and second bandwheels for receiving and guiding a bandsaw, the bandwheels being rotatable about spaced-apart, generally parallel axes of rotation, first and second arbors of the first and second bandwheels respectively, apparatus fixedly mounting the first arbor on the frame, and a strain mechanism for the bandsaw. The strain mechanism comprises a bearing member for the second arbor and an elastomeric member compressibly supporting the bearing member.

Abstract: An automatic carousel-type meat cutting machine in which slabs of meat are placed between pairs of rotating jaws that move around a center vertical axis. One jaw in each pair of jaws is spring-biased for gripping the meat, but the weight of the meat will cause it to move downwardly by gravity and rest on a meat-supporting horizontal and stationary platform. A section of the platform is made vertically adjustable with respect to the stationary part and may be adjusted to determine the thickness of the slices of meat cut from the slabs of meat. The stationary and adjustable sections form a complete circle and they support the slabs of meat which are moved by the pairs of meat guiding pairs of jaws. A horizontal portion of an endless band saw lies flush with the plane of the horizontal fixed platform section and the adjustable platform section is positioned therebelow to determine the thickness of the slice.

Abstract: An improved portable band saw having a unitary, rigid frame or housing, a novel blade tensioning mechanism, an improved drive arrangement for delivering power to the saw, and a more efficient and economical blade guide arrangement.

Abstract: Strain mechanism for bandmill using deadweight lever mechanism in which undesirable effects of inertia of counterweight and friction at knife edges are reduced. Rolling diaphragm air cylinder is used in one of three positions. In first position cylinder extends between arbor carrier arm and plunger tube and supplies portion of saw strain permitting lighter counterweight. In second position it extends between counterweight arm and plunger tube and eliminates counterweights. In third position counterweight is supported on counterweight arm by yoke supported by cylinder which resiliently mounts weight.