Abstract: A hacksaw with an improved mechanism for applying and adjusting the tension on a blade mounted to a blade mount on a front arm and a blade mount on a rocker arm. The rocker arm is pivotally coupled to a handle and is spring biased to place an initial tension on a blade held by the rocker arm and the front arm. A rotatably mounted lever is positioned on the handle for vertically displacing a nut captured in the rocker arm to pivot the rocker arm and adjust the tension on the rocker arm-held blade. An elongate top frame bar of the hacksaw defines a hollow I-beam cross-section accessible from the face of the front handle and is capable of storing saw blades. A bale screw is positioned in the front member for securing the blades in a position extending past the front handle.

Abstract: A hand saw including a blade, a frame that supports the blade, and a tensioning mechanism. The frame including a first leg having a first blade support, a second leg spaced from the first leg, a cross member extending between the first leg and the second leg, and a handle. The tensioning mechanism including a bracket having a second blade support, the bracket pivotable with respect to the frame in a first direction to increase a distance between the blade supports and in an opposite direction to decrease the distance between the blade supports, a lever actuatable between a tension position and a release position, and a linkage that couples the lever to the bracket such that movement of the lever towards the tension position pivots the bracket in the first direction, and movement of the lever towards the release position pivots the bracket in the second direction.

Abstract: A hacksaw with an improved mechanism for applying and adjusting the tension on a blade mounted to a blade mount on a front arm and a blade mount on a rocker arm. The rocker arm is pivotally coupled to a handle and is spring biased to place an initial tension on a blade held by the rocker arm and the front arm. A rotatably mounted lever is positioned on the handle for vertically displacing a nut captured in the rocker arm to pivot the rocker arm and adjust the tension on the rocker arm-held blade. An elongate top frame bar of the hacksaw defines a hollow I-beam cross-section accessible from the face of the front handle and is capable of storing saw blades. A bale screw is positioned in the front member for securing the blades in a position extending past the front handle.

Abstract: A tensioning mechanism for a hack saw blade extends through a pin holder mounting slot of a hack saw frame and applies tension to a hack saw blade attached thereto. The tensioning mechanism includes a first portion having a configuration that, with respect to a configuration of the slot, permits rotation of the tensioning mechanism when the first portion extends through the mounting slot. The tensioning mechanism also includes a second portion having a configuration that, with respect to the configuration of the slot, engages into the slot only in select rotational orientations thereof relative to the slot, wherein one of said orientations is angularly separated from another orientation by a substantially set rotational angle of the second portion. The tensioning mechanism further includes first and second mechanisms configured to prevent removal of the tensioning mechanism from the mounting slot once extended therethrough.

Abstract: A modular saw arrangement includes a main saw frame structure and a detachable handle structure. A second end portion of the detachable handle structure includes a first blade connector and a second blade connector. A blade tensioner arrangement of the main saw frame structure and the first blade connector are configured to be connected with opposite ends of a blade when a first end portion of the detachable handle structure is connected with an upper frame portion of the main saw frame structure so as to form a hacksaw configuration. The second blade connector that enables attachment of the blade in a grip configuration to enable the detachable handle structure to be configured as a stand-alone detachable handle saw when the first end portion is disconnected with the upper frame portion.

Abstract: 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.

Abstract: A tool is provided. The tool may include a handle, a frame, and a removable saw blade including at least one hole on one end thereof and at least one hole on another end thereof. The tool may also include a compensating clip configured to attach the removable saw blade to the frame and to provide tension for the removable saw blade. The compensating clip may include a plate including a clip hook, and the plate further includes an opening where a compensator spring is provided. The clip hook is configured to attach onto the at least one hole of the removable saw blade to attach the saw blade to the frame.

Abstract: A hand saw that includes a frame, a lever, and a rod movable in a first direction to increase a distance between a first blade support and a second blade support and the rod is movable in a second direction to decrease the distance between the first blade support and the second blade support. The rod is coupled to the lever and the frame such that the rod is movable in the first direction and with the lever when the lever moves from a release position toward a tension position in order to tension the blade. The rod is coupled to the lever and the frame such that the rod is movable with respect to the frame in the first direction and the second direction and movable in the first direction and the second direction independent of the lever when the lever is in the release position.

Abstract: A blade adapter for a hacksaw is connected to the spine of the hacksaw and includes three connection portions. The hacksaw blade is connected between the engaging portion connected to the handle of the hacksaw and one of the three connection portions of the blade adapter to set the hacksaw blade at two different angular positions relative to the spine. The hacksaw blade can be set to be parallel to the spine or at an angle relative to the spine. A jabsaw blade is able to be connected to the front end of the hacksaw.

Abstract: An accessory tool is configured to be coupled to a power tool having a tool drive structure. The accessory tool includes a spring component and has a first arm and a second arm attached to the spring component. The first arm includes (i) a first proximal end portion defining a first accessory drive structure that is configured to mate with a first portion of the tool drive structure, and (ii) a first distal end portion having a first holding structure. The second arm is spaced apart from the first arm and includes (i) a second proximal end portion defining a second accessory drive structure that is configured to mate with a second portion of the tool drive structure, and (ii) a second distal end portion having a second holding structure.

Abstract: A cable saw system is described comprising a cable saw blade, a forward handle removably connected to a forward end of the blade, a rearward handle removably connected to a rearward end of the blade. A motor mounted in the rearward handle. A forward block is configured to removably receive the forward handle, and a rearward block spaced apart from the forward block and configured to removably receive the rearward handle. A threaded dowel connects the forward block to the rearward block, the threaded dowel being configured to be rotatable to adjust the spacing between the forward block and the rearward block and thereby to adjust tension in the blade.

Abstract: A wire saw with sawteeth strip updating structure is provided. A buckling structure is designed in the wire saw. The buckling structure is hidden the handle portion of the saw and includes a connecting unit and a combining unit. The connecting unit can be buckled or unbuckled from the combining unit. The sawteeth strip is connected to the combining unit in a tense state. In updating, the user only needs to push a guide sheet to release the connecting unit from the combining unit. Then the sawteeth strip is taken out easily from the saw for updating a new one. The operation is unnecessary to clamp the saw by a great force for the updating operation.

Abstract: A hand saw that includes a frame, a lever, and a rod movable in a first direction to increase a distance between a first blade support and a second blade support and the rod is movable in a second direction to decrease the distance between the first blade support and the second blade support. The rod is coupled to the lever and the frame such that the rod is movable in the first direction and with the lever when the lever moves from a release position toward a tension position in order to tension the blade. The rod is coupled to the lever and the frame such that the rod is movable with respect to the frame in the first direction and the second direction and movable in the first direction and the second direction independent of the lever when the lever is in the release position.

Abstract: A hacksaw with an improved mechanism for applying and adjusting the tension on a blade mounted to a blade mount on a front arm and a blade mount on a rocker arm. The rocker arm is pivotally coupled to a handle and is spring biased to place an initial tension on a blade held by the rocker arm and the front arm. A rotatably mounted lever is positioned on the handle for vertically displacing a nut captured in the rocker arm to pivot the rocker arm and adjust the tension on the rocker arm-held blade. An elongate top frame bar of the hacksaw defines a hollow I-beam cross-section accessible from the face of the front handle and is capable of storing saw blades. A bale screw is positioned in the front member for securing the blades in a position extending past the front handle.

Abstract: 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.

Abstract: 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.

Abstract: A hacksaw includes grip handle, adjustable frame, and adjusting component; the grip handle contains a storage space to accommodate a locating mechanism; the locating mechanism is received in the storage space and thus in an outer cover by means of closing the outer cover pivoted to a bottom of the grip handle to facilitate easy mounting of a blade and easy adjusting the blade by means of the locating mechanism and the adjusting component; and the adjustable frame is capable of storage of spare blade.

Abstract: 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.

Abstract: 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.

Abstract: A saw and/or saw frame including: an elongate substantially rigid back member and a swing arm pivotally connected to the back member so as to be rotatable between an extended position and a storage position; a handle with a first blade mount; the swing arm includes a second blade mount; the back includes a third blade mount disposed proximate to the swing arm; each of the first, second, and third blade mounts being constructed to engage one end of a removably mounted saw blade, with the first, second, and third blade mounts disposed to allow quick changes in blade configuration. The back member also has an elongate blade storage cavity accessible from above adapted to store at least one of the removably mounted saw blades and an auxiliary blade mounting mechanism configured to operatively mount an auxiliary blade extending forward from the frame.

Abstract: A two-position, quick-change hacksaw consists of a back member, handle structure adjacent a rearward end portion of the back member, and a swing arm adjacent the forward end. The free end of the swing arm and the forward end portion of the back member have coplanar blade-engaging elements thereon which serve to engage the forward end of the blade and which are commonly disposed on an arc that circumscribes a third coplanar blade-engaging element disposed on a coupling block of a tensioning mechanism for mounting the rearward end of the blade. Two coplanar sets of transversely paired engagement elements enable mounting of the blade both in a plane parallel to a medial plane of the frame and also in a plane disposed at a substantial angle thereto. In one configuration, with the swing arm in its inoperative position, the saw is adapted for cutting within a relatively confined space; with the swing arm in its operative position the saw is configured for cutting within a relatively unconfined space.

Abstract: A hacksaw includes an elongated blade, a frame, and a blade tension adjustment mechanism. The blade tension adjustment mechanism includes a lever constructed and arranged to be pivotally moved between (1) a blade tensioning position so as to tension the blade, and (2) a blade releasing position so as to release the tension from the blade and thereby allow removal and replacement of the blade. A lock is slidably attached to the lever to slide between (1) a locked position wherein the lock secures the lever in the blade tensioning position, and (2) an unlocked position wherein the lock permits the lever to be pivoted between the blade tensioning position and the blade releasing position.

Abstract: A low profile hacksaw comprising an elongated blade having a cutting edge. A rigid I-beam frame member has a forward end portion and a maximum height portion. Preferably, the maximum height portion is located at the rear end of the frame member, but it may be located intermediate the forward and rearward ends. The frame member has an arcuate portion which extends substantially the entire length between the forward end and maximum height portions and which curves downwardly and forwardly towards the forward end portion to provide the hacksaw with a low profile. A manually engageable handle is provided for manual grasping to enable performance of a cutting operation wherein the cutting edge of the tensioned blade is engaged with a work piece and moved forwardly and rearwardly to cut through the work piece. A releasable blade tensioning device provides a second blade mounting structure on which the other longitudinal end portion of the blade is removably mounted.

Abstract: A hacksaw in which one or more perishable hacksaw blades are conveniently stored and accessed. The hacksaw includes a beam, which defines a blade storage cavity, a handle and a fastening member that is employed to fixedly fasten the beam to the handle. The fastening member is positioned relative to the beam such that it does not interfere with the movement of the hacksaw blade(s) in the blade storage cavity. A plug, which frictionally engages at least one of the fastening member, the beam and the handle, is employed to seal off an end of the blade storage cavity.

Abstract: A quick disassembly hacksaw includes an inverse U-shaped frame having a flexible triangular front handle on fore end, a rear handle on rear end, a front tube and a rear tube respectively disposed under the fore end and rear end, an adjusting mechanism disposed in the front tube, a positioning rod inserted into the rear tube each of which has a polyhedron for connecting a saw blade and a fastening mechanism comprised of a link and a U-shaped leverage latch pivoted to the positioning rod and a lug under the rear handle and locked by a safety detent on a top of the rear handle. The saw blade is fastened by the fastening mechanism and the tensions thereof is adjusted by the adjusting mechanism.

Abstract: A hacksaw includes a frame having a chamber formed in a rear handle, an arm pivotally secured to the handle for tensioning a saw blade and having a rear oblong hole, a lever pivotally secured to the handle, and a tension rod pivotally secured to the lever and having a lower portion extended through the oblong hole of the arm. A latch has a block slidably received in the handle and has an orifice for slidably receiving the tension rod. A spring may bias the latch to engage with the lever, and may bias the arm away from the handle.

Abstract: A hand saw is provided with a support having a front lever, which is pivotable about one of the opposite ends of the support between a rest position, in which it extends coplanar with the support, to an operative position, and a handle mounted on the other end of the support and rotatable thereabout from and in a respective rest position, in which the handle extends coplanar to the support, so as to the hand saw has substantially a linear configuration when the front lever and the handle are displaced in their rest positions.

Abstract: A hacksaw includes a frame having a chamber formed in a rear handle, an arm pivotally secured to the handle for tensioning a saw blade and having a rear oblong hole, a lever pivotally secured to the handle, and a tension rod pivotally secured to the lever and having a lower portion extended through the oblong hole of the arm. A latch has a block slidably received in the handle and has an orifice for slidably receiving the tension rod. A spring may bias the latch to engage with the lever, and may bias the arm away from the handle.

Abstract: A hacksaw in which one or more perishable hacksaw blades are conveniently stored and accessed. The hacksaw includes a beam, which defines a blade storage cavity, a handle and a fastening member that is employed to fixedly fasten the beam to the handle. The fastening member is positioned relative to the beam such that it does not interfere with the movement of the hacksaw blade(s) in the blade storage cavity. A plug, which frictionally engages at least one of the fastening member, the beam and the handle, is employed to seal off an end of the blade storage cavity.

Abstract: A saw blade chuck includes a blade retaining unit, a biasing unit, and a pushing unit. The blade retaining unit is mounted pivotably on a driving arm of a scroll saw. The biasing unit and the pushing unit are disposed on opposite sides of and act upon the blade retaining unit such that the biasing unit biases the blade retaining unit to pivot to a first position, where the blade retaining unit is adapted to engage one end portion of a saw blade, and such that the pushing unit is operable so as to provide a pushing force for pushing the blade retaining unit in a linear direction to cause the blade retaining unit to pivot against biasing action of the biasing unit to a second position, where the blade retaining unit is adapted to disengage from the end portion of the saw blade.

Abstract: A two-position, quick-change hacksaw consists of a back member, handle structure adjacent a rearward end portion of the back member, and a swing arm adjacent the forward end. The free end of the swing arm and the forward end portion of the back member have coplanar blade-engaging elements thereon which serve to engage the forward end of the blade and which are commonly disposed on an arc that circumscribes a third coplanar blade-engaging element disposed on a coupling block of a tensioning mechanism for mounting the rearward end of the blade. Two coplanar sets of transversely paired engagement elements enable mounting of the blade both in a plane parallel to a medial plane of the frame and also in a plane disposed at a substantial angle thereto. In one configuration, with the swing arm in its inoperative position, the saw is adapted for cutting within a relatively confined space; with the swing arm in its operative position the saw is configured for cutting within a relatively unconfined space.

Abstract: A hacksaw includes a saw blade detachably secured between a frame and a handle. An arm is rotatably secured to the lower portion of the handle, a lever is rotatably secured to the upper portion of the handle, and a rod received in the handle coupled between the lever and the arm. The lever is depressible to engage with the handle and to force the arm to engage with the handle, and to tension the saw blade between the frame and the handle. A lock device is slidably the handle and movable toward and away from the lever for selectively securing the lever to the handle.

Abstract: A structure of a hacksaw includes a frame which is combined by a fore part and a rear part, an adjustable mechanism under the fore part connected to one end of the blade for adjusting the tilt angle of the blade, a positioning mechanism under the rear part connected to the other end of the blade and for tensioning the blade by a wedge lever. The frame disassembly to quickly adjust the length to serve different lengths of the blade.

Abstract: The present invention is a lightweight collapsible hand saw for use when camping, hiking or otherwise. The saw breaks down and can be consolidated into a single tubular shape, with all of the components fitting inside the tube. In the functional configuration, a triangular saw may be constructed out of two tubular members having different diameters, a saw blade and a tightening element. Alternatively, both a triangular saw and a buck saw may be constructed out of three tubular members having different diameters, a saw blade and a tightening element. The tubular members form the frame of the saw and contain slots for inserting the saw blade. The tightening element is provided to give the saw the necessary rigidity and impart the necessary tension on the blade. In addition, the apparatus can be used to form a campfire cooking utensil with a number of accessorising elements.

Abstract: The present invention relates to hacksaws. One aspect of the invention relates to a hacksaw with an overmolded frame member wherein the overmolded material has an I-beam configuration. Another aspect of the invention relates to an improved blade tensioning device that reduces the tension load borne by the tensioning device's mounting structure. Another aspect of the invention relates to a method for cutting metal frame members with a reduced amount of scrap.

Abstract: A hacksaw including a frame, a handle, an end piece, and a blade. The frame has an arcuate support rod which is provided at one end thereof with a protrusion and a plurality of recesses, and at the other end thereof with a protrusion and a plurality of recesses. The handle has a top cross rod which is provided with a receiving slot and a plurality of projections and is fastened at one end thereof to the arcuate support rod such that the receiving slot of the top cross rod receives the protrusion of the arcuate support rod, and that the projections of the handle are received in the recesses of the arcuate support rod. The handle is provided with a fastening member opposite in location to the top cross rod for fastening one end of the blade. The end piece is fastened to other end of the arcuate support rod and is provided with a slot for receiving the protrusion of the arcuate support rod, and a plurality of projections which are received in the recesses of the arcuate support rod.

Abstract: A collapsible saw has a mechanism for releasably tensioning and locking a saw blade into position while also conferring lateral support for the blade, namely a cam lock mechanism. Additionally, a long channel member, a short member, and a saw blade are each pivotably connected in the saw assembly. The long and short member pivot connection is releasable in a manner that allows the long and short member to nest one within the other along with the saw blade. A collapsible saw according to the present invention is highly compact and entirely interconnected such that loss of saw parts is not a concern. Another feature of the saw is that its interconnections and design yield a configuration that can be quickly expanded into an operative configuration or place in a collapsed configuration.

Abstract: A hacksaw includes a frame and a handle. A lever is pivotally coupled to the handle. A link has a rear end pivotally secured to the bottom portion of the lever. A blade is secured between the link and the frame and is secured in place when the lever is rotated to engage with the handle and is released when the lever is disengaged from the handle. A latch may secure the lever to the handle when the lever secures the blade in place. A bolt is threadedly engaged with the lever and the link for moving the link relative to the lever and for adjusting the blade tension when the lever secures the blade in place.

Abstract: An improved hacksaw for rigorous use has two embodiments, one with a high available cutting depth exceeding five inches, and another with a low clearance with attendant low cutting depth. The saw is easily constructed of inexpensive materials and has a blade alignment bow whereby forces exerted on the bow by the blade are closely aligned to minimize lateral bending and enable precise cuts.

Abstract: The frame of a metal-cutting saw of the one-piece, hacksaw type includes a bow (6) extended at its rear end by a pistol grip (3) and a protective branch (7) and at its front end by a branch (9) which at its end includes an attachment stud (14) for receiving one of the two ends of a blade (2). The pistol grip (3) has a blade-tensioning device comprised of a blade-tension adjustment system (4) including a lever fixed by an articulation pin (18) to an articulation stirrup piece (8) which extends into the rear part of the protective branch (7). The articulation pin (18) constitutes an axis about which the lever (5) can rotate. The blade-tension adjustment system (4) further includes a blade support (12) which receives the other end of the blade (2) and an opening (12a) for allowing the articulation pin (18) to pass through. A threaded rod (15) is connected to the blade support (12), and provides for articulation of the lever (5) about an articulation pin (17).

Abstract: A hacksaw of the type utilizing an elongated blade maintained tension between respective legs of the saw frame includes a cam-actuated blade tensioning mechanism. One leg of the saw frame includes a fixed blade pin for receipt through a mounting hole defined at one end of the elongated blade. The other leg of the saw frame includes a pin carrier having a blade pin for receipt through the mounting hole defined at the other end of the elongated blade. The pin carrier is pivotal between a blade release position and a blade securement position. In presently preferred embodiments, the pin carrier defines a cam follower engaging an elliptically arcuate cam surface defined on a pivotal actuator member. The actuator member may have a lever portion for providing mechanical advantage during its pivotal movement. A releasable lock mechanism is provided to maintain the actuator member, and thus the pin carrier, in the blade securement position during use.

Abstract: A saw is described as having an adjustable handle wherein the angle of the handle in relation to the longitudinal axis of the saw blade and blade holder is rotatably adjustable.

Abstract: A hack-saw that consists of a powered motor encased in a housing unit with a handle for gripping by the operator. Extending out from the top of the handle is an elongated bar which runs out forward from the motor housing unit to which depends a leg parallelly disposed relative to the motor housing. Extending out from the bottom of this leg is a rod, spring and nut assembly parallel in line to the elongated bar. One end of the metal hack-saw blade is removably attached to the rod, spring and bolt assembly and the other end of the blade is removably attached to the reciprocating output member of the motor extending out from the bottom of the motor housing which when running moves back and forth, causing a sawing motion. In another embodiment the rod, spring and nut assembly includes an anti-rotational structure to assure the hack-saw blade reciprocates aver a constant path of travel to avoid misalignment.

Abstract: A tool which in one aspect is applicable as severing or cutting apparatus including a coupling member for engagement with an elongated extension member such as a swimming pool pole and a blade support frame mounted to the coupling member for movement relative thereto, and a cutting blade mounted at one end the frame and at its other end to the coupling member. Means are provided for adjusting the position of the frame relative to the coupling member for tensioning the cutting blade. In a further form, the coupling member is provided in an adaptor and a separate mounting part is provided for mounting of the blade and blade support frame, the adaptor and mounting part being releasably connected. When disconnected, the adaptor may engage with other forms of implement again for use with an elongated extension member.

Abstract: A hacksaw of the type utilizing an elongated blade maintained tension between respective legs of the saw frame includes a cam-actuated blade tensioning mechanism. One leg of the saw frame includes a fixed blade pin for receipt through a mounting hole defined at one end of the elongated blade. The other leg of the saw frame includes a pin carrier having a blade pin for receipt through the mounting hole defined at the other end of the elongated blade. The pin carrier is pivotal between a blade release position and a blade securement position. In presently preferred embodiments, the pin carrier defines a cam follower engaging an elliptically arcuate cam surface defined on a pivotal actuator member. The actuator member may have a lever portion for providing mechanical advantage during its pivotal movement. A releasable lock mechanism is provided to maintain the actuator member, and thus the pin carrier, in the blade securement position during use.

Abstract: A hacksaw includes a blade tensioning mechanism attached to the lower portion of the handle and connected to the blade through a blade holder. The end of the blade holder is observed via a tension indicator window at the lower portion of the handle, and the handle has respective predetermined indicia adjacent to the tension indicator window for alignment with the end of the blade holder. The blade tension mechanism includes an adjusting screw threadingly engaging the blade holder, and a crank handle mechanically engaging the adjusting screw for adjusting the tension of the blade. At the desired blade tensioning, the crank handle is mechanically disconnected from the adjusting screw and fits closely in the recess underneath the lower portion of the handle.

Abstract: A saw includes a handle having a channel formed in the upper portion for slidably receiving a beam. An arm is secured to one end of the beam. Two rotary members are pivotally secured to the handle and the arm for supporting a saw blade. A knob is slidably engaged in the handle and has a key for engaging with one of the rotary member and for securing the rotary member to the handle. The arm includes a stop for engaging with and for positioning the other rotary member to the arm. The beam and the arm are moved away from the handle for stretching and for securing the saw blade in place.

Abstract: A hacksaw includes a beam having two ends receivable in a tube and a handle. The tube and the handle each has an orifice and an aperture formed in one end for engaging with the ends of the beam and for maintaining the beam in a vertical position relative to the tube and the handle. A saw blade includes two ends secured to the other ends of the tube and the handle so as to form the hacksaw. The two ends of the beam are received in the tube and the handle so as to form a compact folded configuration when the saw blade is disengaged from the tube and said handle.

Abstract: A saw frame having a bow shape has a blade carrier adapter at one end and a tensioner at the other end, between which a blade is tensioned in use. The tensioner is constructed for obtaining a predetermined tension in the blade independently of the manufacturing tolerances and in a substantial range of hole spacings of the blade.

Abstract: A bow saw includes a saw blade seat, a handle and at least one saw blade. The handle is pivotally connected with one end of the saw blade seat. The saw blade seat axially extends into one end of the handle by a certain length. The saw blade pivotally connected with the other end of the saw blade seat. And, each saw blade can be rotated out through an opening of the saw blade seat to be engaged with the other end of the handle so as to form the bow saw in a working state. Therefore, the folding or unfolding operations can be quickly and safely performed and the bow saw can be held with a comfortable feeling.