42results about "Hack saws" patented technology

A hacksaw having a frame that includes a back handle and an elongated beam that has a series of ridges on at least one or more surfaces of the elongated beam that form a file for reducing and smoothing surfaces of an article. The elongated beam has a first distal end coupled with a first back handle section. A hacksaw blade is coupled with the back handle and a fore piece coupled to a second distal end of the elongated beam.

A saw bow for a handsaw includes a saw bow body, a movable member movably mounted in a bottom of a handle of the saw bow body and movable relative to the handle along a longitudinal direction of the saw bow body, a bottom cover having a first pivotal portion pivotally connected with the handle of the saw bow body and a second pivotal portion, and a length-adjustable member having two ends respectively pivotally connected with a pivotal end of the movable member and the second pivotal portion of the bottom cover. As a result, the saw bow of the present invention can provide a congruous appearance and occupy less storage space.

A manually operated cutting tool comprises a frame having a handle portion adapted to engage a user's hand for manual movement of the frame relative to a material to be cut; a blade removably affixed to the frame and moveable along therewith during a cutting operation; the blade having a plurality of cutting surfaces and formed of a base material of a first material having a first toughness and a rigid wear-enhancing outer coating of a second material, different from the first material, external of the cutting surfaces of the base material; the second material having a second toughness more than the first toughness. The frame may be a hacksaw frame or a utility knife frame. The coating may comprises a vapor deposition applied material, such as a physical vapor deposition applied material.

A bow saw structure including a handle, an adjustment unit and a fast installation / detachment unit. The handle has a grip section for a user's hand to extend through and hold. An upper side of the grip section is formed with a tunnel in which an L-shaped support member can be inserted. A first tightening member is disposed in the tunnel. The adjustment unit is mounted on upper side of the grip section for controlling the depth of the tunnel, whereby different lengths of saw blades are installable on the bow saw. The fast installation / detachment unit is pivotally disposed on lower side of the handle. A second tightening member is arranged in the fast installation / detachment unit. The second tightening member and the handle are arranged on the same side of the bow saw. One end of the tightening member protrudes from the handle.

A folding handsaw pack-pole system is a folding pruning saw that a hunter or woodsman may conveniently carry folded and may carry in a sheath having a belt loop, for trimming branches from thick foliage or wooded area to clear lanes through the woods for shooting. The handle has a pole receiver so that the hunter doesn't have to carry a long extension handle with him into the woods, but rather cuts an appropriately sized branch to slide into the pole receiver to cut high branches that are normally beyond the user's reach without such an extension.

A hacksaw including a removable blade has a handle including a recess configured to receive the blade and a frame including a first end and a second end. The first end of the frame is coupled to the handle and the second end extends away from the handle. The hacksaw also includes a blade retention mechanism coupled to the second end of the frame for coupling the blade to the second end of the frame. The blade retention mechanism includes an adjustable fastener coupled to the frame and coupling the blade retention mechanism to the frame, a resilient member seated on the fastener, a retaining member seated on the fastener, the retaining member spaced apart from the frame by a gap and the gap having a width, and a lever coupled to the fastener and movable between a first position and a second position. Moving the lever to the first position reduces the width of the gap to clamp the blade within the blade retention mechanism and couple the blade to the frame, and moving the lever to the second position increases the width of the gap to release the blade from the blade retention mechanism.

A blade-replaceable saw is provided which enables blade replacement work without the need of an additional connecting fitting or the like, facilitates extraction and insertion of saw blades with respect to the grip during that work, and also prevents looseness between the saw blade and the grip even during the use of the saw. The blade-replaceable saw has a saw blade (10) and a grip (20), the saw blade (10) having on its base side a flat insertion handle section (12) configured to be inserted into the grip (20), the grip (20) having a flat insertion slot (22) for receiving the insertion handle section (12) of the saw blade (10), the saw enabling replacement of the saw blade (10). A projection (24) is formed on an inner wall surface (22a) of the flat insertion slot (22) of the grip (20), for reducing the contact area with, and also reducing the contact gap with, the flat insertion handle section (12) of the saw blade (10).

A foldable bow saw movable between a functional saw condition and a folded packable condition includes a handle arm, a top bar, a short arm, a saw blade, and a lever arm, all pivotally connected one to the other with an end of the handle arm and an end of the lever arm forming free, unconnected ends of the assembly. The free end of the handle arm includes a connecting fulcrum surface adapted to removably mate with a fulcrum surface receiver in the lever arm. Rotation of the lever arm in a locking direction about the fulcrum surface moves the pivotal connection of the lever arm to the saw blade to a tensioned functional saw condition. Rotation of the lever arm in an unlocking direction allows the fulcrum surface to be removed from the fulcrum surface receiver and the assembly to be folded to the packable condition.

A saw blade clamping mechanism includes a holder connectable to a reciprocating shaft of a power sawing tool. The holder has a sliding way, a receiving slot for insertion of a saw blade, and a through hole in communication between the sliding way and the receiving slot. A steel ball is movably installed in the through hole. A sliding block is mounted in the sliding way and moveable between a first position for receiving the steel ball for removal of the saw blade out of the receiving slot and a second position to force the steel ball into the receiving slot to lock the saw blade. A spring member supports the sliding block in the second position. A control knob is connected to the sliding block for operation by the user to move the sliding block from the second position to the first position.

Provided is a hacksaw comprising a front cavity in a tang of the frame, a resilient member having one end fastened in one side of the cavity, a handle for receiving the tang and a top opening aligned with the cavity, a pivotal lock lever disposed in the opening and comprising an arm and an end urging member (e.g., cam), a blade inserted through the cavity and the tang into the handle. A thin portion of the urging member is disposed proximate the resilient member and the resilient member is disengaged from the blade when the arm is disposed in a forward position. To the contrary, a thick portion of the urging member is pressed down on the resilient member for fastening a back of the blade when the arm is disposed in a rearward position.

The invention discloses a hand frame saw for a woodworker, and aims to provide a hand frame saw for a woodworker, which is capable of eliminating wood flour on a segmenting and scribing line without power and is safe and environmentally friendly. The hand frame saw comprises a saw blade, a handle and a saw beam, wherein an inflating device is arranged on a position, which is close to the handle, of the upper side of the saw blade, a gas inlet pore and a gas outlet are respectively formed in two ends of the inflating device, a gas storage bag is fixedly arranged on a position, which is opposite to the inflating device, of the saw beam, a gas inlet and a gas exhausting hole are respectively formed in two ends of the gas storage bag, the gas inlet is connected with the gas outlet of the inflating device, a gas pressure switch is arranged on the gas exhausting hole, a gas blowing hole is connected to an outlet of the gas pressure switch, a switch wrench is connected to the gas switch, when sawing operation is performed, the inflating device used for inflating gas into the gas storage bag, and then the gas in the gas storage bag is used for blowing the wood flour covering the segmenting and scribing line away by virtue of the gas blowing hole, and the wood flour can be removed by turning the switch on by virtue of the switch wrench, so that the cutting work is very convenient, and the wood flour is prevented from entering eyes, the mouth and the nose when being blown by an operator, so that the hand frame saw is safe and environmentally friendly.

A saw and hand guard system is provided. This system includes: a hand-operated saw, wherein the saw further includes a handle having a rear portion and a front portion, and wherein the rear portion is adapted to receive a user's hand; and a hand guard adapted to be mounted on the front portion of the handle, wherein the hand-guard further includes: a durable, rigid plate, wherein the plate further includes a single piece of material, and wherein the single piece of material is shaped to provide at least two distinct protective surfaces; at least one bracket attached to or formed integrally with the plate for detachably mounting the plate on the front portion of the handle; and at least one connector, wherein the at least one connector cooperates with the at least one bracket for mounting the hand-guard on the front portion of the handle.

A handsaw for holding a saw blade for cutting is disclosed to include a handle having an cantilever bar, an extension bar pivoted to the cantilever bar and turnable relative to the handle between a received position and an extended position, a blade-retaining arm pivoted to one end of the extension bar remote from the handle and turnable about the axis of the extension bar, and two blade retaining members respectively provided at the handle and the blade-retaining arm for the mounting of a saw blade when the extension bar is turned to the extended position.

The invention provides a blow molding plate sawing and fixing dual-purpose device. The device comprises a fixed bar and scraping needles. The scraping needles are fixedly connected with the fixed bar. The scraping needles are perpendicular to the fixed bar. The scraping needles are arranged in a linear array and convenient to bend. The blow molding plate sawing and fixing dual-purpose device has the beneficial effects that the dual purposes of blow molding plate sawing and fixing among plates are integrated.

A lightweight, thin metal connector plate with one or more through holes or cutouts, containing multiple sharp edges. The sharp edges, within the through hole or cutout, upset and engage the outer layers of a stick or sticks, or similarly essentially cylindrical and irregular members, when inserted into the connector plate and a force subsequently applied, by rotating or moving the stick or sticks off axis from the plate, to fasten the stick or sticks in place. The sheet metal construction provides for a wide rage of additional connection options, by means of easily incorporated features in the connector plate, when used in conjunction with common flexible connectors and solid fasteners. Using the connector plate, tools and structures can be quickly fabricated and then disassembled, from locally harvested woods or canes. The connector plate, being lightweight, compact and made from metal, is well suited to survival preparedness and outdoor activities.

The invention relates to the field of tool equipment, in particular to a novel cleaning hand saw. The novel cleaning hand saw is implemented by the following technical scheme: the novel cleaning hand saw comprises a saw frame, a saw blade mounted on the saw frame and a grab handle connected with the saw frame, and further comprises a cleaning device, wherein the cleaning device comprises an articulated pipe connected with the saw frame and a mainboard connected with the articulated pipe and can turn over relative to the saw frame; a wind power device is arranged on the mainboard; the grab handle comprises a reinforcing sleeve for a user to hold; and the reinforcing sleeve sequentially comprises a main inner layer made of a hard substance, an elastic layer supported by a soft substance and an adsorption layer arranged outside the elastic layer and made of an absorbent material from the inside out. The invention aims to provide the novel cleaning hand saw, which highly fits a hand of a worker, the hand saw further comprises the cleaning device which can be used for efficiently cleaning the cutting parts and the saw blade, and the inner layer of the grab handle is subjected to special treatment, so that the durability is high, and the degree of human comfort is also high.

The invention discloses a retractable hand saw. The retractable hand saw comprises a supporting mechanism, a hanging mechanism, an adjusting mechanism, a handle mechanism, a steel saw blade and a butterfly nut. The hanging mechanism is rotationally connected to the top end of one side of the supporting mechanism. The handle mechanism is rotationally connected to the end, away from the hanging mechanism, of the supporting mechanism. The adjusting mechanism is rotationally connected to the bottom face of the side, close to the handle mechanism, of the supporting mechanism. The steel saw blade isinteractively clamped between the hanging mechanism and the adjusting mechanism. The butterfly nut is in threaded connection between the adjusting mechanism and the handle mechanism. The supporting mechanism is used for providing storage and support. The hanging mechanism and the adjusting mechanism are used for fixing the steel saw blade. The handle mechanism is used for fixing the adjusting mechanism. The retractable hand saw can be contracted into the structural shape of the supporting mechanism after being used, and is convenient to place and carry, and the steel saw blade cannot damage bags or hurt users.

The invention relates to the field of tools and equipment, in particular to a cleaning arm saw. According to the technical scheme, the cleaning arm saw comprises a saw frame, a saw blade installed on the saw frame, and a grab handle connected with the saw frame; the cleaning arm saw further comprises a cleaning device which comprises an articulated pipe connected with the saw frame, and a main plate which is connected with the articulated pipe and can overturn relative to the saw frame; and a wind power unit is arranged on the main plate and comprises a strong wind device and a slow wind device located below the strong wind device, the strong wind device comprises a plurality of strong wind outlet pipes, the slow wind device comprises a slow wind outlet, and the wind outlet diameter of the strong wind outlet pipes is smaller than the wind outlet diameter of the slow wind outlet. According to the cleaning arm saw provided by the invention, the fit degree to the hand of a worker is high, the stability of the motion track of the saw blade in the saw pushing process is enhanced, and the safety coefficient is increased; and the arm saw is further provided with the cleaning device, so that cutting positions and the saw blade are cleaned efficiently.

The invention discloses a multi-saw hand drawing saw which structurally comprises a saw frame, a tension rope, a control board, a combined saw blade and saw blade frames. The saw frame is of an I-shaped structure. The tension rope is arranged at the upper end of the saw frame. The two heads of the upper end of the saw frame are tensioned through the tension rope. The tension rope is a compound rope formed by twisting multiple ropes. The control board is arranged in the middle of the tension rope, is a long-bar-shaped wood block and is inserted in the middles of the ropes of the tension rope. The lower end of the saw frame is provided with the combined saw blade, and the combined saw blade is of a combined structure formed by arranging a plurality of saw blades in parallel. The T-shaped saw blade frames are arranged at the two ends of the combined saw blade, and the two ends of the combined saw blade are arranged on the saw frame in a sleeving manner through the saw blade frames. The multi-saw hand drawing saw has the beneficial effect that the combined saw blade of the saw blades can be used for sawing multiple boards at a time.

The invention provides a bevel machining device for a pipe. The bevel machining device for the pipe comprises a supporting table and supporting frames. A positioning assembly is arranged on the supporting table. An oblique plate is obliquely arranged on the rear side of the positioning assembly and perpendicularly and fixedly connected to the supporting table. A rotating shaft is arranged on the oblique plate. A hand saw is movably arranged on the rotating shaft. The positioning assembly comprises a first rotating plate and a second rotating plate, wherein the first rotating plate and the second rotating plate are rotatably connected to the supporting table in a scissor mode; an upward-concave short arc plate is arranged at the lower end of the first rotating plate, and outer gear teeth are arranged on the outer arc surface of the short arc plate; and a long arc plate which is concentric with the short arc plate is arranged at the lower end of the second rotating plate, and inner gear teeth are arranged on the inner arc surface of the long arc plate. A mounting base is arranged below the positioning assembly. A gear set is rotatably arranged on the mounting base, and the gear set is engaged with the outer gear teeth and the inner gear teeth at the same time. A treading mechanism used for driving a big gear to rotate is arranged on one side of the big gear. The short arc plate and the long arc plate are driven to draw close to each other through the gear set, so that the pipe is clamped; and large clamping force can be obtained only by rotating the two gears by small angles, and thus manpower is saved.