Abstract: A hand tool having a handle provided with a mating surface for detachably securing the handle to a removable attachment. The mating surfaces of the handle and the removable attachment are exposed when not secured together. This feature facilitates cleaning of the device.

Abstract: A connector assembly for connecting a surgical saw blade to a housing of a surgical instrument. The connector assembly allows a surgeon to align, insert and lock the surgical blade in the collect of the surgical instrument without any special tools, and further provides a stable and robust platform for mounting the surgical saw blade thereto. The connector assembly includes a gripper having a centrally located bore and a pair of opposing shelves. A shaft having shoulders is slidably fitted within the bore of the gripper. The shoulders communicate with ledges of the shelves to prohibit movement of the finger gripper. This same mechanism also prevents movement of a surgical saw blade, once inserted within the slot of the shaft, from becoming dislodged or ejected from the connector assembly. A biasing spring biases the gripper in a first position, but the gripper can move between the first position and a second position.

Abstract: The present invention relates to a media cutting tool for use with a template. The apparatus of the present invention maintains proper alignment with a template through the use of a novel offset, rotating, cutting blade and guards against skipping along the cut as the apparatus is drawn around a template through the use of a novel guide mechanism which engages the template being traced. The present invention also employs a transparent handle for an improved view of the cutting area.

Abstract: A blade clamp device for jig saws includes a drive shaft with a holder connected to a lower end of the drive shaft. A recess is defined in an outer surface of the holder for receiving a blade. A lug extends radially outward from the holder. A C-shaped clamp member is pivotally connected to the lug and a torsion spring is mounted to the pin, one end of the spring is engaged with the lug and the other end of the torsion spring is engaged with an inside of the clamp member. A pressing member extends from an inside of the clamp member so as to contact the blade in the recess.

Abstract: A tool-less blade clamps (10, 50) may include a rod (2, 52) having a slot (2a, 2c, 52c) and a guide slot (2b, 52b) formed substantially perpendicularly to the slot (2a, 2c, 52c). A control member (20, 56) may be slidably disposed within the slot (2a, 2c, 52c) and a spring (21, 57) preferably biases the control member (20, 56) towards a forward portion of the slot (2a, 2c, 52c). The rod (2, 52) rotatably supports a sleeve (11, 53). Preferably, the sleeve (11, 53) being prevented from axially displacing with respect to the rod (2, 52) when the sleeve (11, 53) rotates about the rod (2, 52). An L-shaped slot (16, 53a) may be formed in the sleeve (11, 53) and may have a blade lock slot (16b, 53ab) disposed substantially perpendicularly to a blade lock control slot (16a, 53aa). The control member (20, 53) may include a pin (22, 55) that extends through the guide slot (2b, 52b) and travels within the L-shaped slot (16, 53a).

Abstract: A gutting knife including a blade with two forward extensions that define a slot between them and a peripheral cutting edge defined around the sides and bottom of the slot. A first extension has a spike tip and a cutting edge along its outside. A second extension has a blunt tip or bulge which does not cut. A meander pathway along the second extension into the slot. Saw teeth into the slot on the first extension. A recess on the outside of the second extension is inclined rearwardly and includes a cutting edge. A handle at the rear of the knife blade.

Abstract: A reciprocating saw includes a saw blade that is connected to a hand held driver for reciprocating the saw blade to perform a cut. A bit holder and a blade holder is used to provide connection between the saw blade and the handle of the hand held driver. The bit holder includes connecting mechanism for connecting the bit holder to the hand held driver. The blade holder provides a connection between the saw blade and the bit holder. The blade holder includes a holder body and a hex-shaped shank extending rearwardly from the holder body. The shank further includes a first holding mechanism for coupling the holder to the bit holder at the rear end and a second holding mechanism for coupling the saw blade to the holder at the forward end.

Abstract: A connection structure is designed to connect the blade and the handle of a gardening implement and is formed of a connection rod, a control member, a locating head, and two steel balls movably contained in the recess of the control member and the locating holes of the locating head. As the control member is rotated to locate the connection rod which is fastened to the blade, the steel balls are forced by the control member in motion into the locating holes of the locating head. The blade and the handle are separated by rotating the control member in such a manner that the steel balls are forced back into the recess of the control member.

Abstract: A top accessible, pivotably mounted spring assisted blade locking mechanism provides a system permitting front loading capability through an opening in the front of the knife handle and a spare blades compartment accessible through a pivotably mounted side cover along with the employment of a pivotably mounted top accessible single blade retrieval system eliminates the need to separate the two mated halves of the knife handle to effect quick and safe blade change and maintenance of the spare blades supply. The importance of ergonomics is accentuated by the strategic integration of a smooth comfortably held shape with practical access of the required functions operating mechanisms.

Abstract: A hand tool has an elongated blade having a longitudinally inwardly projecting tang having a longitudinal back edge formed with a plurality of transversely directed teeth, a longitudinal front edge, and an elastically transversely deflectable retaining formation. A handle forms a longitudinally open seat having one longitudinally extending side wall. A retaining lever has an edge formed with teeth and an elastically transversely deflectable retaining formation. The lever is displaceable between a closed holding position with the lever teeth meshing with the blade teeth and pressing the blade against the seat wall and the formation transversely engaging and bearing elastically against the blade retaining formation, and an open freeing position with the lever teeth out of mesh with the blade teeth and the formation out of engagement with the blade retaining formation.

Abstract: A hand held loop cutting tool for cutting tufted loops of yarn projecting from a carpet includes a handle portion connected to a blade carrying housing portion carrying a blade holder having a plurality of slots for receiving a like number of blades. The blades have two cutting edges which may be secured in the holder with one of the edges projecting from the operating face of the housing. When the first edges of the blades are spent, the blade holder may be reversed within the housing to present the second set of edges. The blades themselves do not have to be removed from the holder until both cutting sets of cutting edges have been spent. A user merely needs to insert one of the first edges into each projecting loop where there are more than one projecting loop in a line of stitching and pull to cut the loop.

Abstract: An adjustable safety utility knife includes an elongated ergonomically shaped handle formed of two elongate shell members each having a peripheral edge and an outer generally convex surface and an inner generally concave surface. The shell members are fastened at the peripheral edges along a vertical parting plane to form an elongated internal cavity. The handle defines a front end, a back end and an intermediate portion suitable for being gripped by a user and also defining top and bottom surfaces extending along opposite sides of the shell members along the peripheral edges. The handle has a slot-like aperture at the front end substantially aligned with the parting plane and dimensioned for passage of a flat cutting blade therethrough. A guide element within the elongated cavity guides the cutting blade between a first position for safely storing the blade fully inside the cavity and a second position for selectively extending the blade beyond the aperture to expose at least a portion thereof.

Abstract: The invention relates to a clamping device for saw blades, in particular in motor-driven straight-back and saber saws, which is fixable to a lifting rod.

Abstract: A multi-purpose tool assembly enables replaceable attachment of any one of a plurality of tools having the same or different function to a single tool handle assembly. The tool handle assembly is constructed from a U-shaped frame member supporting a pivotable plate which is operative for clamping the shank portion of a tool to the frame member. A plurality of tools may be packaged with a tool handle assembly in the nature of a kit.

Abstract: A device for mounting a blade on a reciprocally movable blade carrier of a cutting tool includes a blade pressing member and a blade pressing surface formed on the blade carrier, so that the blade can be pressed against the blade pressing surface by the blade pressing member. A retainer member serves as a guide for the pressing member, so that the pressing member can move in a direction substantially perpendicular to the pressing surface between a first position for pressing the blade against the pressing surface and a second position for releasing the pressing force of the pressing member. An operation member is shiftable relative to the blade carrier and is operable by an operator for moving the pressing member between the first position and the second position. A ball is interposed between the pressing member and the operation member. A contacting surface is formed on the operation member, so that the ball can roll along the contacting surface.

Abstract: A scraping tool for vinyl floors for easily and conveniently removing vinyl flooring, in particular. The scraping tool for vinyl floors includes an elongate shaft having a head portion and a handle portion with the head portion having a greater breadth than that of the handle portion and having a recessed portion in the top thereof near a bladed front edge, and also includes a bladed member having a bladed front edge and being removeably secured in the recessed portion, and further includes a bracket member having a bladed front edge and being securely fastened to the head portion with the bladed member being securely engaged between the head portion and the bracket member. The elongate shaft has an intermediate angled portion and is approximately 5½ feet long.

Abstract: A reciprocating saw 11 with a keyless blade clamp 35 having a slotted-channel 37 in a clamp body 39 for receiving a blade 40 alternatively in first and second, intersecting cutting planes. The blade 40 may be alternatively oriented in four 90° offset orientations with the blade teeth facing in the same directions as the top, bottom, left and right side of the saw 11. When the retainer 53 is in the clamp disengaged position, a blade 40 may be slidably inserted and removed from the channel 37 in any of the four 90° offset orientations. A retainer 53 is located in a track 51 in the clamp body 39 and is movable between clamp engaged and disengaged positions. When the blade 40 is located in the first cutting plane, the retainer 53 engages the edge 55 of the blade. When the blade 40 is in the second cutting plane, the retainer 53 engages the sidewall 57 of the blade 40.

Abstract: In order to permit two halves of a hand tool to be quickly separated and then reconnected following an operation such as gaining access to, storing or exchanging a cutting blade, tool or the like, a connector is arranged to require rotation only through about 90° to achieve disconnection/connection. The connector has an engagement/locking feature which can pass through an elongate/shaped opening on one of the two halves, and then be prevented from passing back therethrough when the rotational angle of the connector is changed with respect to the opening and rotates the engaging/locking feature into engagement with an external surface surrounding the elongate/shaped opening.

Abstract: A reciprocating tool (e.g., a reciprocating saw) comprising a housing, a spindle mounted for reciprocating movement within the housing and having an end adapted to receive a saw blade, and a blade clamp mechanism connected to the spindle and adapted to attach a saw blade to the spindle. The blade clamp mechanism includes an actuating member mounted on the end of the spindle and capable of moving relative to the spindle between an engaged position and a disengaged position, and a locking member operatively associated with the actuating member and moveable relative to the spindle between a locked position that locks a saw blade to the spindle and an unlocked position that releases the saw blade.

Abstract: A handheld machine tool, for example a circular saw, has a disk-shaped tool which is driven in rotation in a housing which holds a drive motor and a tool shaft carrying the tool. The tool can be clamped between a clamping nut, a clamping screw, and two supporting flanges. One supporting flange can be rotated easily relative to the tool shaft without use of auxiliary tools and is supported with an extensive friction at the tool. This supporting flange can be dependably clamped or loosened without tools. The machine tool further has an adjusting device which is coupled with that supporting flange to displace the latter axially toward the tool when that supporting shaft is rotated relative to the tool shaft due to rotational driving. The adjusting device therefore clamps the tool with an increasing force and tries to displace that supporting flange axially away from the tool automatically when the tool is stopped and accordingly reduces the clamping force.

Abstract: A hair razor holder (10) for combing off hair is disclosed, comprising a body (11, 12) having a blade cartridge housing means, and a finger ring (13). The finger ring (13) is provided slightly off the center of gravity (G) such that the holder (10) can smoothly turn on a finger inserted in the ring (13). The holder (10) additionally has a blade refreshing means (14, 23) which facilitates renewal of the blade edge without removing the cartridge (20) from the housing. The holder (10) can provide streamlined and safe hair combing off without requiring putting the holder (10) aside during work.

Abstract: A blade holder attached to a saw handle. The saw blade includes a slot on one side, and is engaged inside the blade holder and is securely held in place by stoppers formed inside the holder's frame and by pressure applied by spring action. This spring action is created via a turning of a knob and attached pressing part and protrusion. When the knob is in a loosened position, the blade is easily removed and replaced through a holder receiving part. A new blade is received through the receiving part and by tightening the knob, the new blade is thereby secured in the holder.

Abstract: A saw includes an elongated saw blade having a rear end portion which is formed with a hooked extension and a locking hole having a restricted entrance. The handle member has left and right side walls which confine a blade receiving space therebetween, and an insert slit for access into the blade receiving space. A pivot shaft extends transversely between the left and right side walls. The rear end portion of the saw blade is extendible into the blade receiving space via the insert slit so that the hooked extension hooks pivotally with the pivot shaft. A locking pin extends movably and transversely between the left and right side walls, and has a wider section with a cross-section larger than the restricted entrance but smaller than the locking hole, and a narrower section with a cross-section smaller than the restricted entrance.

Abstract: The reusable device handle of this invention includes a nosepiece, a body, an activation rod, an ejector rod and a biasing mechanism. The nosepiece and the body are generally hollow. The nosepiece is connected to the body. The activation rod and the ejector rod are connected together and are disposed in the nosepiece and the body. The biasing mechanism is disposed in the body and biases the activation rod toward the proximal end of the body so that the proximal portion of the activation rod extends proximally from the proximal end of the body. The distal end of the nosepiece is designed to accept a cartridge therein that holds a blade or some other tool. The cartridge can be removably connected to the nosepiece. By pressing the proximal end of the activation rod, the distal end of the ejector rod contacts the cartridge and ejects the cartridge from the nosepiece.

Abstract: In a saw for surgical purposes comprising a saw blade holder movable by a motor and a saw blade fixable in the saw blade holder, to enable insertion and removal of the saw blade without a tool, it is proposed that the saw blade holder comprise an insert guide for the saw blade with a holdback projection, that the saw blade carry a resilient detent projection which in a relaxed position, with the saw blade inserted in the insert guide, engages the holdback projection from behind, and that an actuating element be mounted on the saw blade holder for displacement against the resilient detent projection, the actuating element moving the resilient detent projection, during the insertion, into a tensioned position in which the detent projection is pushable past the holdback projection when the saw blade is pulled out of the saw blade guide.

Abstract: A utility knife system comprises a handle assembly, a blade assembly, and a protective blade cover. The handle assembly and the blade assembly have complementary latching mechanisms for easy exchange of blades without opening the handle. The protective blade cover functions cooperatively with the handle assembly and blade assembly to ensure that a user does not touch the cutting edges of blades while exchanging them.

Abstract: A handle assembly having a swivel head for detachably holding a blade, includes a substantially elongate handle having a proximal end and a distal end, the proximal end is formed with a threaded shank having a having a hemispherical socket at the end thereof, a sleeve having a threaded socket on one end for threadably mounting on the threaded shank and having an open slot extending from the other end to intersection of the threaded bore and partially along the length thereof, a blade mounting head comprising a threaded cylindrical body having a shank extending from one end, the shank adapted for receipt in the open slot and having a spherical tip for receipt in the threaded bore and engagement with the sleeve and the semi-spherical socket, the body adapted for swiveling on the spherical tip in the socket and slot, an axial bore extending coaxial of the threaded cylindrical body from the other end, an elongated collet having a longitudinal axis and inner walls surrounding an axial passage and first and second

Abstract: A hand-held implement, is provided with a body including an elongated snap-fit post and an elongated snap-fit cartridge housing. The snap-fit cartridge housing includes a coaxial recessed groove and readily snap-fits into the body of the pen by the resilient engagement of the tip of the snap-fit post into the coaxial recessed groove of the snap-fit cartridge housing. The cartridge housing can be readily removed from the body of the pen and replaced with another cartridge housing inserted in its place. The body of the implement has external surfaces which define contours which match and ergonomically engage the surfaces of a user's thumb and fingers when the user grasps the implement, so as to provide a large surface area of contact between the user's hand and the implement.

Abstract: This invention relates to an improved guarded surgical scalpel having a movable guard that can be retracted to expose the blade and that can be extended to cover the sharp cutting edge of the blade. The guard is telescopically mounted inside the blade handle and includes a deflectable top wall portion that holds a detent pin or that defines a radially extending flange. This detent pin or flange engages a slot having upturned ends that is formed in at least one side wall of the blade handle. The detent pin or flange is biased upwardly into the upturned ends of the slot to hold the guard in the retracted or extended position. The blade can include a tang having a notch formed therein. The distal end of one sidewall of the guard can be formed with a complementary notch such that when the distal end of the sidewall of the guard engages the proximal end of the blade, forward movement of the guard forces the blade off of the scalpel.

Abstract: A reciprocating saw 10 includes a motor 17, a gear train 19, a drive shaft 15 and a blade clamp 13 for clamping a blade 11 in the saw. Clamp 13 includes sleeve 23 with first and second axially spaced and generally opposed projections 37, 39 for clamping an assembly 21 of blade 11 and drive shaft 15. A bias member 55 for clamping and unclamping blade 11 in sleeve 23 is adjustably attached to a top sidewall 33 of sleeve 23 and engages one side of assembly 21 at a location inwardly of first and second projections 37, 39. Bias member 55 forms a moment arm with a portion of sleeve 23 extending between the location of bias member 55 and first projection 37. Projection 37 serves as the fulcrum for the moment arm. The formation of a moment arm increases the effectiveness of the clamping action and more securely retains the blade 11 in the clamp 13.

Abstract: A holder assembly for a surgical blade includes a handle assembly and a wrench for loosening/tightening the blade from/to the handle of the handle assembly. The handle assembly includes a collet having two longitudinal slits that enable the collet to secure the blade in a first and second direction to prevent slippage during operation. The collet fits in the handle and is secured by a retaining member that fits over the collet with the blade intact. The retaining member is loosened/tightened by a wrench that is part of the holder assembly. The wrench is configured to cover the blade completely when the wrench is placed in operation. Part of the cover is removable for cleaning by inserting the closed end of the wrench into the wrench body and pushing the cover's cap off.

Abstract: A knife has an elongated body having a front end formed with a forwardly projecting trapezoidal-section tongue having a pair of side surfaces and a base surface bridging the side surfaces and a holder formed with a complementary trapezoidal-section slot having a pair of side surfaces extending parallel to and longitudinally slidable on the body side surfaces and a base surface bridging the holder side surfaces, extending parallel to the body base surface, spacedly confronting the body base surface, and forming therewith a blade seat. The tongue and groove have widths measured parallel to the base surfaces and transversely of the elongated body that decrease uniformly forward so that the side surfaces converge forward. A blade is gripped between the base surfaces and projecting forward from the body and holder.

Abstract: A clamping system for attaching a saw blade to a blade carrier of a reciprocating saw includes a clamp member having a tubular body and a hollow interior. The clamp member is mounted on the free end of a blade carrier which has a longitudinal slot for receiving the shank of a saw blade. The free end of the blade carrier has an aperture in its side wall. In a preferred embodiment a ball is received within the aperture and freely movable therein. The inner surface of the clamp member has an eccentric groove which defines a camming surface engaging the ball. Upon rotation of the clamp member to a locking position the ball engages an aperture in the shank of the blade to hold the blade in place. The clamp system is designed to accept saw blades having standard universal designs. In another preferred embodiment a pin is received within the aperture in the blade carrier. The pin has a first end which is adapted to be received within the aperture in the shank portion of the saw blade.

Abstract: A scraper having a body portion with a front edge and a cover portion slidable relative to the body portion. The blade is received in the body portion with its cutting edge extending beyond the front edge of the body portion. The cover portion is movable relative to the body portion from a retracted position exposing the blade cutting edge to an extended position overlying the blade cutting edge. The cover portion is held in its retracted and/or its extended positions by locking mechanisms on the cover portion and on the body portion which cooperate with each other to hold the cover in its retracted and/or extended positions.

Abstract: A box opener comprising a blade having a cutting edge; a holder with blade, including a handle, and a terminal on the handle retaining the blade with the blade edge protruding; and a shield carried by the holder proximate the terminal, for movement between extended position in which the blade is protected, and retracted position in which the blade edge is exposed for cutting.

Abstract: A cutting tool for cutting an object flush against a surface from which it protrudes is disclosed. The cutting tool comprises a first jaw member which includes a blade having a cutting edge. A second jaw member is pivotally connected to the first jaw member and may include an anvil having a substantially planar surface with a first end substantially aligned with the cutting edge of the blade. The handle which may have first and second arms is connected to the first and second jaw members for facilitating relative movement of the cutting edge and the substantially planar surface between an open position at which the cutting edge is remote from the substantially planar surface and a closed position at which the cutting edge is adjacent to the first end of the substantially planar surface.

Abstract: A reciprocating cutting tool includes a shank for mounting in a pneumatic hammer, a blade holder assembly connected to the shank and a blade clamped in the blade holder assembly. The blade holder assembly includes a base member and a retainer member which are clamped together. A blade receiver is formed between the base and retainer members. The base member includes a recess and the retainer member includes a shoulder which is received in the base member recess for abutment by a fixed end of the blade.

Abstract: A cutter assembly which includes a support, a recess in the support, a slot formed within the recess for receiving a cutting blade having a cutting edge such that only the tip of the cutting edge extends from the support. A U-shaped channel adjacent to the slot defines a flexible finger in engagement with the blade. A cover plate shaped to fit within the recess retains the blade within the slot. The cover plate has a pin projecting therefrom which is dimensioned to be received within a distal leg of the U-shaped channel so as to maintain the finger in engagement with the blade and at least one projecting button for engagement with the surface of the blade to retain the blade within the slot.

Abstract: A cutting tool adapted to be reciprocated by a manually manipulated air hammer or similar device while being used to separate laminated materials. The cutting tool comprises a blade of thin resiliently flexible metal having a sharpened edge and an opposite driven edge, and an adapter comprising a blade holder portion which may include polymeric material permanently molded around a portion of the blade adjacent its driven edge, and a shank portion shaped for engagement by the air hammer attached to the blade holder that has an end shaped for engagement by the air hammer or similar device. The majority of or all of the adapter can be formed of the polymeric material to provide a low mass for the cutting tool and an average specific gravity for the adapter that is significantly less than the specific gravity of metal.

Abstract: A cake slicer and divider includes a core with a plurality of arms detachably securable thereto to project radially from the core. The core includes locators, such as slots to support the arms, the locators being positioned in an array on the core whereby a plurality of arms may be attached to the core to extend radially from the core. Each pair of adjacent arms defines a segment and the number of segments is variable in dependence on the number of arms that are attached to the core. Each arm is an elongate planar member with a cutting edge on its under edge. A force transmitting member is provided at an upper end of the core whereby hand pressure on the force transmitting member imparts a downward force on the core and arms to cause the cutting edges of the arms to slice the cake into segments enclosed between adjacent planar members so that the slicer and divider when in situ with the sliced cake protects the segments from air contact.

Abstract: A saw blade retention system for retaining a saw blade to a reciprocating saw includes a shaft connected to the saw for reciprocation and having a slot for receiving the saw blade. The saw blade retention system also includes a chuck disposed about the shaft and having a slot aligned with the slot in the shaft in an unlocked position for allowing the saw blade to be disposed in the slot for the shaft. The saw blade retention system further includes a cam-type mechanism for allowing the chuck to rotate angularly relative to the saw blade and shaft to a locked position to prevent the saw blade from exiting the slots and for allowing the chuck to move axially relative to the shaft to prevent axial movement of the saw blade between the chuck and the shaft. Complementary inclined surfaces are provided on the blade and the chuck to center the blade relative to its intended path of reciprocation.

Abstract: A self-locking knife which has a guide at the heel of the blade integral with the heel of the knife or attached therewith which blade is mounted in a pair of bolsters superposed on each other, forming a casing for the knife and defining a space or slideway therebetween for passage of the blade from a retracted to an extended position where the blade is projected forwardly of the casing and providing interlock between the blade and the casing, maintaining the blade in either position.

Abstract: A saw blade retention system for retaining a saw blade to a reciprocating saw includes a shaft connected to the saw for reciprocation and having a slot for receiving the saw blade. The saw blade retention system also includes a chuck disposed about the shaft and having a slot aligned with the slot in the shaft in an unlocked position for allowing the saw blade to be disposed in the slot for the shaft. The saw blade retention system further includes a cam-type mechanism for allowing the chuck to rotate angularly relative to the saw blade and shaft to a locked position to prevent the saw blade from exiting the slots and for allowing the chuck to move axially relative to the shaft to prevent axial movement of the saw blade between the chuck and the shaft. Complementary inclined surfaces are provided on the blade and the chuck to center the blade relative to its intended path of reciprocation.

Abstract: A new and improved hand-held scraper apparatus is disclosed for scraping a surface at a plurality of predetermined scraping angles. The apparatus includes a blade support, and the apparatus is used by an operator for scraping a surface with a push-pull scraping motion parallel to the longitudinal axis of the blade support. More specifically, the apparatus includes a rigid handle, a rigid blade support connected to the handle, and a plurality of non-adjustable, blade-receiving slots located in the blade support and arranged at predetermined increments along the longitudinal axis. Each of the blade-receiving slots is oriented at a respective predetermined slant angle with respect to the longitudinal axis. The slant angles are in a range from ninety degrees to zero degrees. A blade is inserted into a respective blade-receiving slot, and, in use, the blade forms a respective scraping angle with the surface that is scraped. The respective scraping angle is supplementary to the respective slant angle.

Abstract: A combination surgical blade holder allows simple insertion sequentially of a plurality of blades, each blade having an opening for receiving a cleat and/or an abutment in a blade receiving area on the holder. The holder includes a fixed portion and a rotatable portion that pivot relative to one another in the same longitudinal plane around a pivot point positioned adjacent the blade receiving area and lock together to securely hold the blade in the blade receiving area. While the fixed portion of the holder is gripped in one hand, the thumb or finger of the same hand is used to unlock and rotate the rotatable portion to release and eject the blade singlehandedly, without touching the blade. The fixed portion of the holder includes a cleat and/or an abutment that mate with an opening in the blade. Alternatively, the blade includes a tab that mates with a depression in the blade receiving area to lock the blade in the holder.

Abstract: A reciprocating cutting tool includes a shank for mounting in a pneumatic hammer, a blade holder assembly connected to the shank and a blade clamped in the blade holder assembly. The blade holder assembly includes a base member and a retainer member which are clamped together. A blade receiver is formed between the base and retainer members. The base member includes a recess and the retainer member includes a shoulder which is received in the base member recess for abutment by a fixed end of the blade.

Abstract: A two-piece cutter member for mounting on a sickle bar has a rigid thin support element arranged for relatively permanent attachment to a sickle bar, and a flat planar pyramid-shaped spring metal blade. A portion of the blade provides at least one bridge or loop for encircling the support element and holding the blade on the support element. A section of either said the portion or the support element is displaced with respect to the support face to releasably hold the blade on the support when the blade is fully positioned on said support element.

Abstract: A two-piece cutter member for mounting on a sickle bar has a rigid thin support element arranged for relatively permanent attachment to a sickle bar, and a flat planar pyramid-shaped spring metal blade. A portion of the blade provides at least one bridge or loop for encircling the support element and holding the blade on the support element. A section of either said the portion or the support element is displaced with respect to the support face to releasably hold the blade on the support when the blade is fully positioned on said support element. The spring metal blade is preferably formed of two thin sheet welded together near their edges.

Abstract: This invention relates to a utility knife having a handle with two or more angular bends. The utility knife has replaceable blade, which may be retractable, clamped in the nose of the knife handle. The knife handle is hollow and separable to accommodate the storage of spare blades in the handle. Most utility knives either have handles which are substantially straight or which have a single angular bend. These knives are more limited in their application or produce difficulty in cutting materials in an obstructed area. A knife having a handle with two or more bends enables the user to cut materials in close quarters or in obstructed areas with greater ease. Different handles provide greater reach or leverage under different circumstances. An alternative knife includes a handle with two or more angular bends, one of which is adjustable. This allows the user to select a configuration that offers optimum reach and leverage.

Abstract: A saw blade retention system for retaining a saw blade to a reciprocating saw includes a shaft connected to the saw for reciprocation and having a slot for receiving the saw blade. The saw blade retention system also includes a chuck disposed about the shaft and having a slot aligned with the slot in the shaft in an unlocked position for allowing the saw blade to be disposed in the slot for the shaft. The saw blade retention system further includes a cam-type mechanism for allowing the chuck to rotate angularly relative to the saw blade and shaft to a locked position to prevent the saw blade from exiting the slots and for allowing the chuck to move axially relative to the shaft to prevent axial movement of the saw blade between the chuck and the shaft. Complementary inclined surfaces are provided on the blade and the chuck to center the blade relative to its intended path of reciprocation.