Abstract: A quick change knife blade assembly, for use in conjunction with a tape roll dispensing cartridge assembly of a case sealing machine, comprises a knife blade mounted upon a knife blade mounting plate. A pin plate is fixedly connected to mounting pins passing through the knife blade, and springs are interposed between the pin plate and the mounting plate so as to normally bias the pin plate to a position at which the mounting pins prevent the removal of the knife blade from the mounting plate. When the pin plate is depressed against the biasing forces of the springs, the mounting pins are moved so as to permit the knife blade to be removed from the mounting plate.

Abstract: A foldable hand tool having a blade holder mounted with a handle for movement from folded and unfolded positions. The blade holder has an opening adapted to receive blades of different sizes. The foldable hand tool further has a locking mechanism to lock the holder in an open position. A blade holder lock engages a resilient arm formed in the side wall of the handle.

Abstract: A handle for a utility knife includes a housing made up of two or more portions. In one embodiment, a manually operable member for use in releasing the blade is retained to at least one portion of the housing and does not become separated from the housing when the housing is in an open state. In another embodiment, a catch for engaging the blade extends from a support member that is slidably movable within the housing. In another embodiment, the housing is formed of metal and a nose portion is formed of a metal that is more wear resistant than the rest of the housing, in order to improve the durability of the nose portion.

Abstract: A tissue cutting device is described, a representative one of which includes: a handle part; a head unit including comprising a plurality of blades arranged so as to extend substantially parallel with a longitudinal direction of the handle part at intervals and a blade holding portion for holding the plurality of blades; and a head holding part located at the distal end of the handle part, for holding the head.

Abstract: The invention relates to a clamping device (8) for connecting a saw blade (12) to a reciprocating rod (6) of a jig saw, in particular a hand-operated compass saw (2), comprising a mounting (20), which is connected to the reciprocating rod (6) and has a recess (22) for receiving a head end (10) of the saw blade (12), a locking sleeve (30), which can be turned about the axis (40) with respect to the mounting (20) against the force of a torsion spring (60) to lock the head end (10) of the saw blade (12) in a locking position in the recess (22) and to allow removal of the saw blade (12) in a removal position. It is intended that a stop (78) interacts with a part (80) of the torsion spring (60), in order to prevent movement of the locking sleeve (30) beyond the removal position.

Abstract: A releasably locking mechanism for locking and releasing the shank of a blade or other implement snugly within a receiver, wherein a magnetized ball extends through aligned holes in the shank and the first wall of the receiver, and seats in a smaller hole in the second wall of the receiver so that the equator of the ball is positioned on the side of the shank nearer to the second wall of the receiver. Unseating the ball and repositioning its equator to the opposite side of the shank, nearer to the first wall of the receiver, facilitates removal of the ball to allow removal of the shank from the receiver.

Abstract: A compact utility knife includes a blade holder slidably connected to a handle. A trapezoidal utility blade detachably mounts to the blade holder via a blade lock mechanism. A slide lock mechanism selectively retains the blade holder in its extended or retracted position relative to the handle. When the blade holder is extended, the blade holder and a majority of the blade extend forwardly of a forwardmost point of the handle. Extending the blade holder significantly increases an overall length of the knife such that the knife is comfortable to use when in the extended position and longitudinally compact when in the retracted position. The knife includes a blade lock mechanism. An aperture in the front of the handle creates a gap between the blade and the handle to discourage debris on the blade from transferring to the handle when the blade is retracted.

Abstract: An improved scraping tool with a retractable safety guard, for removing debris and dirt from glass, tile and the like. The scraping tool comprises a housing formed of two separable housing portions and a guard member, and is adapted to securely retain a single- or double-edged blade between the housing portions. The separable housing portions are removably secured and held in sealed alignment by a plurality of securing elements, including a releasable housing lock mechanism. Within the housing, a scraping blade is held in a rigid, stationary position by a plurality of posts. A guard member, the ends of which form a pair of upper and lower blade shields, is positioned and secured in sliding engagement within the housing.

Abstract: An exchange blade knife includes a replaceable blade, a blade holder and a blade lock. The replaceable blade includes an opening adjacent to its base edge. The blade holder includes a blade recess for receiving the replaceable blade and a boss corresponding to the opening in the blade which projects from the surface of the blade recess. The boss has a low portion that is no thicker than the replaceable blade and a raised portion that extends above the surface of the replaceable blade. The blade lock pivots on the blade holder between an opened position for receiving the replaceable blade and a closed position for retaining the replaceable blade. The blade lock also includes an opening for receiving the boss of the blade holder.

Abstract: Several preferred embodiments are disclosed for a tool-less blade clamping apparatus for a reciprocating tool of the type which has a reciprocating plunger which has a tool attachment receiving slot for receiving a tool attachment of the type that has a shank portion. The clamping apparatus has an unclamped position and a clamped position. In the unclamped position, a tool attachment can be easily inserted and when it is in its clamped position, the tool attachment is securely retained. The preferred embodiments have at least one spring biasing the apparatus toward the clamped position, a releasable retaining mechanism for holding the apparatus in its unclamped position after being placed in that position. When the blade shank portion is inserted into the slot a predetermined distance, the shoulders of the shank portion release the retaining mechanism to move it to its clamped position.

Abstract: A knife system may comprise a blade, the blade defining a number of voids, and a number of features configured to be removably coupled to the blade, wherein the blade is configured to house the features in the voids defined by the blade. The feature may be coupled to the blade through any means which will allow it to be easily removed, interchanged, and/or replaced.

Abstract: A surgical saw blade coupler for removably holding a surgical saw blade. The surgical saw blade may be of various shapes and sizes, including, but not limited to straight or crescentic. The surgical saw blade coupler includes a cap, a pin and a driver. The driver is rotatably coupled to a motor within a housing. A cup is located within the housing within a bearing. The cap and the pin form a slot which receives a first end of the surgical saw blade. The cap and the pin also form a groove for receiving a back edge of the surgical saw blade. The surgical saw blade coupler is moveable between an open position in which the surgical saw blade may be removed, exchanged or inserted, and a closed position. A biasing spring acts against a button and the pin to close the coupler.

Abstract: A retractable blade knife with an opening assisted mechanism has a handle, a blade mounted in the handle, an extending assembly mounted between the blade and the handle. At least one detent formed at a spine edge of the blade. The extending assembly has a positioning frame, a slider mounted beside the positioning frame and attached to the blade and a spring attached to the positioning frame and the slider. The positioning frame has a resilient rod selectively abutting the spine edge and a proximal end of the blade. The blade should be pushed manually a certain distance to allow the spine edge of the blade to push a rear end of the resilient rod outwardly. When the detent of the blade and a lock protrusion of the slider both depart from the resilient rod of the positioning frame, the spring may further pull the slider to move together with the blade to stretch out the blade.

Abstract: A hand saw includes a saw blade, a handle, and a blade carrier. The saw further includes a blade clamp assembly having a locking member that removably couples the saw blade to the blade carrier so that the saw blade pivots with the blade carrier about a pivot axis. An actuating button is manually movable generally transverse to a longitudinal axis of the saw blade by the user between an engaged position and a disengaged position. In the engaged position, the actuating button engages the blade carrier to retain the blade carrier and the saw blade in one of an extended position and a folded position. In the disengaged position, the actuating button is disengaged from the blade carrier so that the blade carrier and the saw blade can be pivoted between the extended and the folded positions of the saw blade.

Abstract: Provided is a manual cutter comprising a holder fitting unit (30) having a holding hole portion (35). A tip holder (10) for the column-shaped manual cutter includes a tip (14) rotatably fitted at its one end, and a positioning attachment part (16) formed by notching the other end. The holder attachment part (30) is caused to fix the tip holder (10) in the holding hole portion (35) by abutting and pushing a fixing screw (38) onto the positioning attachment part (16). As a result, the complicatedness of the tip fitting and replacing works can be eliminated to make the tip proper without any error.

Abstract: A knife includes a handle having a blade containing portion for mounting a substantially flat blade, an opening in a terminal end of the blade containing portion through which an end of the blade can project, a blade retainer inside the blade containing portion, having a first projection selectively engagable with a corresponding cutout in the blade for removably retaining the blade, and a blade release member having a second projection. The blade release member is mounted in the blade containing portion and movable in a direction substantially perpendicular to the major plane of the flat blade such that the second projection contacts and flexes the blade to disengage the first projection and the blade cutout to disengage the blade retainer from the blade. This allows removal of the blade from the blade holder via the opening.

Abstract: A reciprocating saw has a saw blade, a fastening device provided for the saw blade and holding the saw blade in a non-rotating fashion, a reciprocating lifting rod having a free end supporting the fastening device, a locking element provided for axially fixing the saw blade in the fastening device, and having an adjusting spring that acts in a direction of the saw blade, wherein the locking element is movable between a release position and a locked position and holds the saw blade in the locked position in a form-locked fashion.

Abstract: A hand-held cutter with automatic blade changer which has a casing, short blades each with an aperture, a pushbutton and a plug, and the casing is composed of an outer casing, a fixed blade holder and a retractable blade holder; and it further has a blade changer which is divided into a blade unloading chamber and a blade loading chamber. The present invention has the advantages of being simple in construction and convenient to use, and allowing the users to change and dispose of the blades without touching them, thereby effectively protecting personal safety.

Abstract: A removing tool for car-window edge strips includes a grip, a linking rod, a protective disc and a tool set. The protective disc is positioned between the grip and the linking rod, and the linking rod has a flat insert groove diametrically formed vertically for the tool set to insert therein and kept tight by screws. The protective disc can protect hands of a user from getting hurt during removing operation. The flat insert groove of the linking rod can be used for combining different tool sets for removing car-window edge strips and dried glue attached with the edge strips with convenience and quickness.

Abstract: A safety scalpel that incorporates a reusable metal scalpel handle similar in shape and feel to the conventional metal handle preferred by most surgeons, and a disposable blade cartridge that covers the blade before, during and after use, and is easily mounted and released from the scalpel handle. The blade cartridge includes a blade with similar cutting profiles as standard surgical blades, a blade holder that is permanently fixed to the blade, and a blade guard that covers the blade and within which the blade holder is able to slide. The scalpel handle is reusable, while the blade cartridge is disposable. The blade cartridge is attached to and detached from the scalpel handle in a direction generally perpendicular the longitudinal axis of the scalpel handle.

Abstract: A surgical blade includes a handle with a recess sized to receive the proximal end of a blade assembly. The recess includes a notch as well as opposed facing distal ridges designed to engage elevated surfaces in the blade assembly to maintain the blade assembly and handle assembled. The blade assembly includes a blade portion and a fitting having a protrusion sized to be received in the proximal notch of the recess in the handle when the blade portion is assembled to the handle. The fitting also includes side faces having opposed elevated surfaces obliquely disposed so that they are engaged by the distal ridges within the handle recess. The fitting also includes an upwardly extending catch that engages a distal surface on the handle to assist in locking the blade assembly to the handle. The recess of the handle includes inner tapered surfaces.

Abstract: An extended-life cutting blade is adapted for mounting on a hand-held cutting tool in multiple operative orientations. A single cutting blade may provide up to four independent shear edges, each of which has a useful life. The blade can be easily changed from an orientation adapted to cut a workpiece with one shear edge to a different operative orientation adapted to cut with a different shear edge by selecting an appropriate mount on the blade.

Abstract: A utility knife system for cutting objects The utility knife system has an external handle, a retractable sheath, a retracting mechanism, and an internal housing. The external handle has a sheath sliding track running longitudinally therein and a hinge. The retractable sheath has at least one protrusion that corresponds to the shape of the sheath sliding track, slides within the external handle. The retracting mechanism moves the retractable sheath and locks it in a desired position. The internal housing is received within the retractable sheath and the external handle, and has a hinge attachable to the hinge of the external handle, and a blade retention end opposite of the hinge. The blade retention end receives a cutting blade.

Abstract: A utility knife is useful for operations such as glazing, roofing, carpeting and sheet rock fabrication wherein the knife is used in close proximity to window edges, walls or corners. A blade-holding portion of the utility knife has a planar bottom wall and structure for mounting the blade at a small angle relative to the bottom wall so that the blade is able to flex and substantially conform to the plane of a surface upon which the planar bottom surface of the utility knife is supported. A handle portion of the utility knife is offset from the planar bottom surface so as to position a user's hand away from the surface on which the utility knife is supported.

Abstract: An extended-life cutting blade is adapted for mounting on a hand-held cutting tool in multiple operative orientations. A single cutting blade may provide up to four independent shear edges, each of which has a useful life. The blade can be easily changed from an orientation adapted to cut a workpiece with one shear edge to a different operative orientation adapted to cut with a different shear edge by selecting an appropriate mount on the blade.

Abstract: A cutting tool clamp mechanism for a power tool includes a housing supported by a spindle, the spindle being configured to receive and drive a cutting tool. A clamping system is supported by the housing and a portion of the clamping system is movable relative to the spindle. The clamping system includes an actuator portion and an engaging portion coupled to the actuator portion. The clamping system has an engaged condition, in which the engaging portion is configured to secure the cutting tool to the spindle, and a released condition, in which the engaging portion is configured to disengage the cutting tool from the spindle. A biasing member positioned between the spindle and the clamping system biases the clamping system to the engaged condition. When the cutting tool is removed from the housing, the clamping system is configured to be held in the released condition, and upon insertion of the cutting tool into the housing, the clamping system moves from the released condition to the engaged condition.

Abstract: A cutting tool clamp mechanism for a power tool includes a housing supported on a spindle, the spindle being configured to drive a cutting tool. A locking member is positioned in and movable with respect to the housing, the locking member including a slot extending through the locking member for receiving the cutting tool, the slot defined by at least one surface for engaging the cutting tool when the cutting tool is received by the slot. A biasing member is configured for applying a force to the locking member to bias the at least one surface of the locking member into engagement with the cutting tool when the cutting tool is received by the slot.

Abstract: A utility blade for use with conventional retractable and fixed blade utility knives comprising a blade body having a generally trapezoidal configuration defined by a cutting edge, an opposite back edge, a pair of opposing side edges and a pair of cutting points defined by the points of intersection between the side edges and the cutting edge. The blade further defines a pair of score lines, each proximate to one of the side edges. The score lines enable the user to remove a dulled or damaged cutting point, which in turn provides the user with two additional cutting points defined by the points of intersection between the score lines and the cutting edge. Further, the blade is configured with one or more notches strategically located on the back edge of the blade, such that each cutting point can extend from the utility knife at approximately the same distance.

Abstract: A knife or hoof knife where the cutting blade element of the hoof knife is flexibly mounted in the knife handle, at least partially compensating rough motions during trimming. The knife with this design therefore fits more comfortably in the hand and enables, for example, wrist-friendly trimming of a horse's hoof. The flexibility can also be varied by the use of damping elements with different hardnesses and by designing the cutting blade element as an exchangeable module, so that different cutting blade elements can be provided on one handle element.

Abstract: A clamp device for a reciprocating saw is disclosed herein, which does not require the use of a tool for saw blade replacement. The main feature of the device is that two clamping blocks are pivotally mounted on a bracket and each of the clamping blocks has a tooth portion and a cam portion formed on an outer surface thereof. An elastic member is located between the bracket and the clamping blocks. A button connected to a rod, which passes through a cover plate of the bracket and includes a tooth slot for engaging with the tooth portion of the clamping block. When the rod moves in an axial direction, the two clamping blocks are brought to rotate so that the cam portion can fasten or loosen the saw blade, and thereby the saw blade can be mounted and demounted conveniently and rapidly.

Abstract: An extended-life cutting blade is adapted for mounting on a hand-held cutting tool in multiple operative orientations. A single cutting blade may provide up to four independent shear edges, each of which has a useful life. The blade can be easily changed from an orientation adapted to cut a workpiece with one shear edge to a different operative orientation adapted to cut with a different shear edge by selecting an appropriate mount on the blade.

Abstract: A saw blade clamping mechanism includes a saw blade spindle, a support sleeve, a clamping pin, and a rotating sleeve. The spindle has a longitudinal receiving slot and an axial elongate slot. The rotating sleeve has a retaining slot. A movable pin is secured on the rotating sleeve and extends through the elongate slot. A latch pin is fixed on the support sleeve and is held within the retaining slot. The rotating sleeve is movable from a first position to a second position. When the rotating sleeve is in the first position, the latch pin is positioned at an outer end of the circumferential section of the retaining slot and the clamping pin inserts into the longitudinal receiving slot of the spindle to fix a saw blade. When the rotating sleeve is in the second position, the latch pin is positioned at an upper end of the axial section of the retaining slot and the clamping pin retracts from the receiving slot of the spindle to release the saw blade.

Abstract: An expanding, exposed-blade arrow head and a method of its operation. In a preferred embodiment, the arrow head comprises: a ferrule comprising three blade holders and having a longitudinal cavity having a bottom; a tip comprising a piston that is slidably mounted in said longitudinal cavity, said tip having a front end having three slots; three blades, each of said blades having a forward end that is pivotably mounted in one of said slots and a body having a cutting edge, each said body being slidably mounted in one of said blade holders; wherein the sliding of said piston in said longitudinal cavity toward said bottom causes said cutting edges to move outward.

Abstract: A metallic housing utility knife and method for making the device with a soft over molded elastomeric cover to provide blister free comfort and slip proof safety. The cover or skin is molded into the unique structure of the housing in a fashion that results in mechanical bonds that embrace the cover on the housing. The knife includes flexible posts from the cover that project into the blade storage compartment of the housing to prevent internally stored spare blades from moving within the storage compartment. An elastomeric blade clamp integrally formed with the cover serves to restrict lateral movement of blades of varying sizes when installed in a cutting position within the knife assembly. A rear quick release latch and interlocking housing sections provide a convenient way to open and close the knife and assure that it is also secure and firmly held when locked in a safe cutting position.

Abstract: A sealant cutting tool including a handle defining a blade slot. Also included is a clamping bolt having a clamp axis transverse the blade slot, which clamping bolt is threadably engaged with the handle. In addition, a “T” pull is operatively associated with the clamping bolt so that rotation of the “T” pull around the clamp axis causes a distal end of the clamping bolt to move relative to the blade slot. The sealant cutting tool may include a blade received in the blade slot in operative association with the clamping bolt. In addition, the “T” pull may include an engagement head operatively associated with a proximal end of the clamping bolt. The clamping bolt may include a noncylindrical shoulder received through a mating, noncircular opening formed in the engagement head. Thus, the noncircular opening may be selectively engaged with the noncylindrical shoulder, allowing the “T” pull to be selectively engaged or disengaged from the clamping bolt.

Abstract: An utility knife and method of blade removal in a utility knife comprising releasing a cam pressure using a lever on a fastener holding a first half and a second half of a handle of a utility knife; separating the first half and second half; and rotating the first half from the alignment with the second half to allow a blade to be removed are shown.

Abstract: A saw blade incorporates an integrated cant angle. The saw blade includes a cutting portion having a toothed edge and opposite edge. The toothed edge defines a cutting plane. A shank portion extends from the cutting portion and is laterally offset from the opposite edge of the cutting portion defining a step thereat. The shank includes an end portion including a mounting edge, the mounting edge and step define a mounting plane which is angularly offset from the cutting plane.

Abstract: An electric-powered cutting machine includes: an electric motor, a housing for the electric motor; a plunger driven by the electric motor to reciprocate; and a blade holding mechanism. The blade holding mechanism holds a blade at a tip end portion of the plunger. The blade holding mechanism includes: a blade receiving face including a groove, a swinging member and a pressing member. The groove is shaped substantially the same as an attachment portion of the blade. The swinging member has one and other ends and pivoted at a swing fulcrum. The one end has a blade pressing portion capable of being disposed to oppose to the groove. The other end elongates to separate from the plunger. The pressing member presses the one end toward the groove.

Abstract: A knife blade having a cutting edge with a first end and a mounting edge opposite the cutting edge. Typically the first end will be a point, but other configurations are possible. In addition, the knife blade has a first attachment slot extending from the mounting edge toward the cutting edge and away from the first end. The first attachment slot may be tapered at a select taper angle. In addition, the first attachment slot may include a first segment extending from the mounting edge toward the cutting edge and a second segment extending from the first segment away from the first end. Similarly, a third segment of the first attachment slot may extend from the first segment toward the first end. In one embodiment, the first, second, and third segments form a substantially “T” shaped attachment slot. Preferably, the second and third segments of a “T” shaped attachment slot are tapered at a select taper angle from the junction with the first segment.

Abstract: A trimmer includes a blade connection portion and a handle, and a blade is engaged with a recess defined in one side of the blade connection portion. A C-shaped clamp has two ridges extending from two insides thereof and the two ridges are slidably engaged with a first groove defined in the other side of the blade connection portion and a second grooves defined in an outside of the pattern block so as to sandwich the blade between the pattern block and the blade connection portion.

Abstract: The cutting assembly functions to sever the urethane bed bonding a windshield to a vehicle. The assembly comprises a reciprocating air gun connected with a cutting blade by a shaft. The blade has a straight front cutting edge about 4 inches in width. The blade is reciprocated in and out of the bed to sever it.

Abstract: A system and method are disclosed for securing a blade to a blade post or handle base. A handle base is provided with a receiving port that includes a taper or dovetail configuration along a portion of each wall. The receiving port accepts a blade, and a cap is positioned within the exposed receiving port above the blade surface. The sides of the cap are secured within the dovetail sections along each wall of the receiving port and opposite securing ramps engage to secure the blade into position. The blade may be a keratome blade that is intended for opthalmic use, but the system and method can be used in connection with various types of opthalmic and non-opthalmic surgical knives.

Abstract: The invention relates to a knife holder for a microtome having a knife receiver for fixing and positioning a knife and a knife for the knife holder. The knife holder is ergonomic, the operation is made easier and safer, and the knife does not need to be changed as often. To this end, the knife receiver is constructed to accommodate a disk-shaped knife. The knife is given the shape of a regular polygon, whereby the edges are cutters. The knife receiver has an axle on which the knife can rotate such that the cutters can be positioned for cutting an object.

Abstract: A replaceable blade utility knife is disclosed that uses permanent magnet to facilitate opening the knife handle for blade replacement. The utility knife has a handle made of two halves. The halves are held together by a connector, and rotate around the connector when the knife handle is opened. Permanent magnets are mounted in each half of the knife handle to separate the halves, rotate the halves to the desired open position, and to hold the halves in position while the blades are being changed. The permanent magnets act as a magnetic actuator for opening the handle halves.

Abstract: A tool is disclosed having a holder provided with a mounting opening for mounting on a drive shaft, which may be driven in oscillating fashion, and having further a fixture for mounting a working element. The working element comprises at least two holding sections, spaced one from the other in tangential direction to the mounting opening, and wherein a mounting plate is provided which is engaged by releasable securing elements that coact with the holding sections for clamping the working element against the holder.

Abstract: An arrangement for clamping a saw blade (12) includes a retaining member (6) on which a blade (12) for clamping can be mounted. The retaining member (6) is lockable in at least two positions such that each of the two positions clamps the blade (12) at a predetermined angle relative to a shaft (2) which drives the saw blade (12).

Abstract: The present invention relates to a keyless blade clamp mechanism including a base, a sliding block slidably disposed on the base and a clamping lever pivotally connected on the base. On one pivot side of the clamping lever is a clamp plate and on the other pivot side of the clamping lever is a plate. The base has a supporting surface opposing the clamp plate. In use, the sliding block slides to engage and press the plate causing the clamp plate to pivot and a gap to appear between the clamp plate and the supporting surface to permit a saw blade to be inserted into (or be pulled out of) the gap. The present invention has the advantage that few components are involved and it is easily manufactured at low cost.

Abstract: A utility knife including: a body defining an interior cavity, and a blade carriage slidably disposed within the cavity. The blade carriage is configured for removably receiving at least one blade, and is at least partially slidably removable from the cavity, thereby allowing facile replacement of the blade. In one embodiment, the carriage may receive first and second blades, each of which is extensible from an associated end of the body. A utility knife blade including dual cutting edges and cutting points is also provided.

Abstract: A replaceable-blade knife useful as a carpet knife or utility knife, and having a handle with a spare-blade holder movably mounted therein, and a blade-clamping bar for securing an active cutting blade at one end of the handle. A locking means is provided to lock the holder in a protective closed position, and alternatively to release the holder to an open position by movement of the bar, and to enable ready access to blades in the holder.

Abstract: A tool fastening mechanism has a housing 2, in which a clamping opening 3 is embodied for receiving a tapering tool shaft clamping end 4 of a tool part 5. The clamping opening 3 tapers inward in the introduction direction of the clamping end 4 of a tool part 5, and furthermore the tapering sides are inclined toward one another in a plane extending perpendicular to the introduction direction, as a result of which the opening has a trapezoidal cross section, and the length of this cross section decreases away from the orifice of the clamping opening 3. The housing 2 furthermore has a transverse opening 7, which intersects the clamping opening 3 and in which a locking pin 8 is received.