Abstract: A histology radius blade grossing knife has a blade mounting system adapted to operatively retain a histology radius trimming blade. The blade mounting system provides a retaining spine for engaging an upper edge of the trimming blade, wherein a rear portion of the retaining spine is securely sandwiched by retaining plates of the blade mounting system. Furthermore, the trimming blade provides notches and/or recesses for facilitating such operative association. Each histology radius trimming blade embodies a radiused or otherwise uniquely shaped heel for cutting and dissecting tissue.

Abstract: A cutting tool for truncating elongated structural members has a frame with a pair of parallel siderails connected at a first end by a support plate and at a second end by a removable end gate, the frame having an open center adapted to receive the structural member therethrough. The truncating is performed by a fixed penetrating cutting edge on an end gate and a driven penetrating blade slidably disposed within the frame to advance towards the end gate. The end gate has two integral penetrating cutting edges pointing in opposite directions. The driven penetrating blade and the fixed penetrating cutting edge may have concave cutting edges relative to one another and configured to be adjacent to one another along the travel of the driven penetrating blade. Alternately, an end gate second cutting edge may be directed to the opening within the frame and have a piercing V-shaped cutting edge.

Abstract: A histology radius blade grossing knife is provided. The histology radius blade grossing knife has a blade mounting system adapted to operatively retain a histology radius trimming blade. The blade mounting system provides a retaining spine for engaging an upper edge of the trimming blade, wherein a rear portion of the retaining spine is securely sandwiched by retaining plates of the blade mounting system. Furthermore, the trimming blade provides notches and/or recesses for facilitating such operative association. Each histology radius trimming blade embodies a radiused or otherwise uniquely shaped heel for cutting and dissecting tissue.

Abstract: A cutting tool having multiple functional faces and an adjustable blade. The cutting tool may include a solid body having multiple functional faces, a blade, and a peg. The multiple faces of the solid body may include a cutting face, a gripping face, a base face, one or more securing faces and a pressure face. The cutting face may be curved and may form a receiving bay for receiving an item to be cut and may include a plurality of slots. The blade may be secured in any one slot of the plurality of slots. The peg may help to secure the blade within the cutting face. The cutting tool may also include a compartment for storing extra blades.

Abstract: A utility knife configured with a retractable cutting blade that is extended and retracted by a blade actuation mechanism. The blade actuation mechanism includes a slider button assembly and a blade carriage assembly that are operably connected in variety of configurations, including a configuration with a rack-and-pinion arrangement between the slider button assembly and the blade carriage assembly. The rack-and-pinion blade actuation mechanism is configured to automatically retract the cutting blade as the cutting blade is lifted from the cutting surface.

Abstract: A surgical instrument includes a first member extending between a proximal end and a distal end. The distal end includes a plurality of fingers extending radially outward in a tapered configuration. A second member extends between a proximal end and a distal end. The proximal end of the second member is configured for mating with the distal end of the first member. A third member has an inner surface defining a cavity configured for disposal of the first member and engagement with the first member to fix the first member with the second member. Systems and methods are disclosed.

Abstract: A utility knife employing a blade having multiple cutting portions, and a housing for quickly and simply swapping out one cutting portion for another. In a preferred embodiment, a six-cutting-portion featured blade is employed. Each point of the six-cutting-portion featured blade features two distinct cutting portions, for a total of six cutting portions located on a single blade. The blade can be rotated about a central axis to expose new cutting portions as old portions wear and dull. In another embodiment, a single-edged blade featuring two cutting faces is housed in a knife handle. The blade can be flipped when the first portion is dull or worn to expose a second cutting face. The handle may optionally include a storage space for storing additional blades.

Abstract: A utility knife employing a blade having multiple cutting portions, and a housing for quickly and simply swapping out one cutting portion for another. In a preferred embodiment, a six-cutting-portion featured blade is employed. Each point of the six-cutting-portion featured blade features two distinct cutting portions, for a total of six cutting portions located on a single blade. The blade can be rotated about a central axis to expose new cutting portions as old portions wear and dull. In another embodiment, a single-edged blade featuring two cutting faces is housed in a knife handle. The blade can be flipped when the first edge is dull or worn to expose a second cutting face. The handle may optionally include a storage space for storing additional blades.

Abstract: A cutting tool utilizing a replaceable blade has a body which defines a blade-accepting pocket having an interior within which the body of the blade is nestingly accepted when inserted within the pocket and for releasable securement of the blade within the blade-accepting pocket. Furthermore, the blade-accepting pocket includes an abutment surface against which a surface of the blade body bears against when the cutting edge of the blade is moved into cutting engagement with an item being cut with the tool.

Abstract: A trimmer head assembly for use on a vegetation cutting machine. The trimmer head assembly has a housing. The housing has a top surface, bottom surface, and at least two recessed areas there between. Pivot posts are disposed within each of the recessed areas. An anchor disc is disposed around each pivot post. The anchor disc is free to rotate around the pivot post within a range. Each anchor disc has two trimmer line channels extending through it. The two trimmer line channels are joined by an open edge groove that runs along one edge. A length of trimmer line is provided for each anchor disc. Each length of trimmer line has a first end that extends through the first of the trimmer line channels, a second end that extends through the second of the trimmer line channels and a bend that seats in the open edge groove.

Abstract: A trimmer head for use with a plurality of lengths of flexible cutting line in a flexible line rotary trimmer having a plurality of line holders rotatably mounted thereon. Each line holder defines a pair of laterally spaced apertures in an upper surface thereof, a passageway extending longitudinally therethrough, terminating in an extended end thereof and communicating with the laterally spaced apertures. An interior guide surface extends along a curvilinear path from the spaced apertures to the passageway and a web extends between the apertures whereby end portions of lengths of cutting line can be extended into and through the spaced openings, along the guide surfaces into and through the passageway and outwardly therefrom, whereupon lengths of line extend about and are held against the web with portions of the line projecting from the passageways in the line holders for the cutting of vegetation.

Abstract: A trimmer head for cutting vegetation is adaptable to operate in blade trimming mode and in monofilament trimming mode, and requires minimal time and effort to change between the two modes. The device comprises a bottom plate and a top plate. The top and bottom plate are urged together, thereby locking the blades in place. When the top and bottom plate are separated and rotated relative to one another, a blade may be inserted or removed from the blade posts by a gap formed between the top of the blade post and the top plate. The top plate includes a surface having a plurality of trimmer blade posts adaptable to pivotally mount at least one trimmer blade. The top plate further comprises a plurality of monofilament holes for receiving a monofilament line therethrough.

Abstract: A package for a surgical blade tip is provided herein. The package cooperates with the surgical blade tip to properly retain it and facilitate mounting onto a surgical blade handle. In one aspect, the invention includes a package having a body with a side wall and at least two detents extending inwardly from the side wall. In addition, a surgical blade tip is provided having an adaptor with a blade extending therefrom. The adaptor includes at least two recesses formed therein. The surgical blade tip is disposed in the package with the detents being at least partially inserted into the recesses. Also, the detents are configured to apply a retentive force to the adaptor to retain the adaptor in a first position and configured to deflect with a predetermined amount of torque being applied to the surgical blade tip so as to permit the adaptor to rotate from the first position to a second position where the detents are not inserted into the recesses.

Abstract: An accessory for a reciprocating power tool including a first blade clamp mechanism and a linkage having a first end and a second end. The accessory further includes an attachment member coupled to the first blade clamp mechanism and to the first end of the linkage. The attachment member couples the linkage to the tool. A shaft is secured to the second end of the linkage and includes a second blade clamp mechanism. A distal member is coupled to the power tool and defines a channel through which the shaft extends. The channel defines a first stop surface and a second stop surface. A biasing mechanism is contained within the distal member and supported by one of the first and second stop surfaces. The biasing mechanism biases the shaft in a first position.

Abstract: The present application provides a work head for a rotational brush cutter. The work head comprises an upper plate, a lower plate and a blade, the upper plate and the lower plate being fixedly coupled. The lower plate is circular and has a passage therethrough with a gear arranged in the passage. The blade has a body portion and a connection portion with the body portion able to be extended outside of the upper and lower plates. The through passage is designed so that the blade can be replaced without requiring the upper plate and lower plate to be disassembled. As a result, because the blade is not restricted by a narrow space between the upper plate and the main frame, the work head does not need to be removed from the brush cutter to replace the blade thereby saving time and effort.

Abstract: A split blade housing adapted to support an annular knife blade for rotation in a power operated rotary knife. The blade housing includes a mounting section and a body section extending from the mounting section and forming a ring. The mounting section of the split blade housing is adapted to be mounted to a handle assembly of the rotary knife and includes a recess providing clearance for a pinion gear that extends from the handle assembly to engage and drive the knife blade. The split blade housing includes an annular groove for rotatably supporting the knife blade, the groove defining a rotational plane of the knife blade. The split blade housing includes a split defining first and second end portions adjacent the split to facilitate removal of the knife blade from the housing. The housing split is peripherally offset from the mounting section recess and the split is transverse with respect to a center vertical axis of the blade housing.

Abstract: Driving power is transmitted to an output shaft, via driving and driven bevel gears, to a cutter blade. A gearbox supports the output shaft via first and second bearings. The second bearing is engaged by an engaging member to be prevented from axial movement, toward the blade, relative to the gearbox and supports the output shaft near the cutter blade. The output shaft is connected to the driven bevel gear such that it is prevented from rotation relative to the driven bevel gear but allowed to move axially. When the engaged state, by the engaging member, of the second bearing is canceled, the shaft is allowed to axially move toward the cutter blade until the shaft becomes rotatable relative to the driven bevel gear, at the same time of which a retaining stopper prevents the shaft from further axial movement.

Abstract: This invention is directed to a grout removal tool comprising: a frame having a proximal end and a distal end; a blade removably attached to the distal end of the frame; a wheel rotatably attached to the proximal end of the frame for supporting the frame above a surface; a pressure pad rotatably attached to the frame having a pressure pad cavity defined in the pressure pad for receiving a portion of the frame; a hinge pin disposed inside the pressure pad cavity; a hinge pin opening defined in the rearward portion of the frame for receiving the hinge pin allowing the pressure pad to rotate from a open position to a closed position; and, a detent assembly having a first member carried by the pressure pad and a second member carried by the frame juxtaposed when the pressure pad is in a closed position.

Abstract: A folding utility knife with a blade lock and release mechanism is provided, and the knife comprises: a handle pivotally connected to a blade holding compartment, the handle comprising at least two side walls forming a space, the space of the handle is designed to encase at least a portion of the blade holding compartment during a folded position, the blade holding compartment comprising at least one side wall having at least two internal cavities, the first cavity for holding a blade with at least two indentations, at least a portion of the blade holding compartment designed to be situated within the space of the handle during a folded position, the blade holding compartment comprises a front end, a rear end and a faceplate for covering the internal cavities, the front end of the blade compartment holder and at least a portion of the faceplate forming an opening at the front end of the blade holding compartment which allows a portion of the blade to protrude from the blade holding compartment; and a blade lo

Abstract: A utility knife includes a first housing portion carrying one of a strike plate and a sliding nut assembly and a second housing portion carrying the other one of the strike plate and the sliding nut assembly. The sliding nut assembly includes a rotatable screw and a sliding nut. The sliding nut is movable between a first position where the sliding nut is positioned behind the strike plate and a second position where the sliding nut is positioned spaced from the strike plate. When the sliding nut is in the first position, the sliding nut engages the strike plate upon rotation of the screw to draw the first housing portion toward the second housing portion.

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: A clamping device of a reciprocating power tool includes at least one clamping unit, which has at least one working-tool receiving element and has a variation element, disposed on the working-tool receiving element, for varying at least one parameter of the working-tool receiving element. The variation element is movably mounted on the working-tool receiving element and/or has at least two mutually differing working-tool receiving contours.

Abstract: A cutting tool for cutting vegetation including a rotary cutting bit adapted to be advanced through the vegetation in a direction perpendicular to a rotational axis of the bit. The rotary cutting bit can be supported by two bit supports spaced apart axially. The tool can include an extension pole which allows the rotary tool to be mounted adjacent a distal end of the pole. In this way high branches and the like can be cut.

Abstract: A cutter apparatus includes a housing configured for gripping by a hand, a blade holder and/or blade coupled to the housing, a guard secured to the housing, and a handle coupled to the housing via an engagement interface configured to allow a user of the cutter apparatus to selectively interfit together the housing and the handle in multiple different cutter apparatus configurations including a pair of configurations in which the guard, in relation to each configuration, faces the blade from right and left sides, respectively, of the cutter apparatus.

Abstract: The present invention relates to a contoured scalpel handle. The contoured shape of the handle provides for increased contact area with the user's hand using a larger diameter central portion and a smaller diameter trough. The generally circular cross-section allows rotation of the angle of the blade relative to the tissue without the need to change the grip on the handle. The contoured handle can be used as an adapter sleeve in which a scalpel handle can be inserted or can include a blade mounting element on which a blade is directly mounted.

Abstract: A cutter apparatus includes a housing, a blade holder coupled to the housing, and a blade storage assembly including blade storage compartments, one of the blade storage compartments being configured to serve as a cover for another of the blade storage compartments. The housing includes a hood and the blade storage assembly is coupled to the hood (e.g., secured to the underside of the hood) such that the blade storage assembly is made accessible to a user of the cutter apparatus by repositioning the hood in relation to another portion of the housing.

Abstract: A cutter apparatus includes a housing, a blade carrier coupled to the housing, a blade lock for securing a blade to the blade carrier, and a blade release device coupled to and repositionable within the housing, the blade release device being repositionable to a blade release position at which the blade release device contacts and repositions at least a portion of the blade lock such that the blade can be removed from the blade carrier.

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: A concave tapered food product includes a cross section and a second end having a shape defined by a generally concave arc and a generally convex arc. The concave tapered food product has a first side and a second side shaped by a longitudinal cut along the foodstuff. A cutter assembly for cutting a foodstuff to form the concave tapered food product includes a housing member. The cutter assembly also includes a curvilinear blade including a cutting edge for cutting the foodstuff, the cutting edge defining an arc along a first portion of the curvilinear blade and a foot positioned at an end of the curvilinear blade for supporting the curvilinear blade. The foot is configured for being received and secured in the housing member. The housing member is configured for at least partially enclosing the curvilinear blade.

Abstract: A cutting-assembly mount for hair clippers includes an accommodating base, which can be fastened on the hair clippers, and an accommodating limb, which is mounted on the accommodating base and on which an interchangeable cutting assembly can be arranged. A blocking element is provided which can be moved between a pivoting position and a blocking position and is designed to be suitable for blocking a pivoting movement of the accommodating limb in the direction of the accommodating base without any cutting assembly arranged on the accommodating limb.

Abstract: A handsaw includes a handle and a blade. The handle includes a lock assembly. The blade is releaseably mountable on the handle and includes a lock engaging region located toward one end thereof. The lock assembly includes a lock structure and a manually enagageable actuator. The lock structure is movable between a lock position in which it lockingly engages the lock engaging region to lock the blade to the handle, and a release position in which the lock structure is released from engagement with the lock engaging region to enable the blade to be released from the handle. The actuator is manually actuatable to move the lock structure from the lock position to the release position.

Abstract: The present invention relates to a reusable metal blade handle. More particularly, the present invention relates to a reusable metal blade scalpel handle with safety features provided therein which are also usable across a wide range of blades. In particular, the present invention has application for reusable metal surgical scalpels, providing the facility of a uniform handle type across a variety of blade types.

Abstract: A grinding head of a grinder is provided with a knife assembly that includes a knife holder with a number of arms, each having a knife insert slot, for receiving a matching number of knife inserts. The knife inserts have a blade or cutting edge and a bottom edge. The bottom edge, rather than being a straight edge, is shaped to define a pair of bearing portions that fit within the slot of the knife holder arm and allow the knife insert to be firmly retained in the slot. A recessed area is located between the bearing portions. The recessed area accommodates any imperfections in the floor of the insert slot, and provides a void area within which any material contained within the slot can be received when the knife insert is engaged within the slot.

Abstract: A guarded surgical knife handle includes a lower handle portion, an upper handle postion, and a button. The lower handle portion includes a blade holder, a proximal pair of lateral shelves, and a distal pair of lateral shelves. The upper handle portion includes a guard portion, a proximal post between the proximal pair of shelves with a first widened post portion wider than the lateral spacing between the shelves, and a distal post between the distal pair of shelves with a second widened post portion wider than the lateral spacing between the shelves. The button has a button waist narrower than the second lateral spacing and a widened button portion below the button waist wider than the second lateral spacing. A bias member connected to the button and at least one of the handle portions provides an upward force on the button.

Abstract: A guarded surgical knife handle includes a handle portion with a blade holder, a chamber within the handle portion, and a slot. The guarded surgical knife handle also includes a guard having an open distal end slidably mounted within the handle portion that can slide longitudinally between an unguarded position and a guarded position. The guard is sized to surround the blade in the guarded position. The guarded surgical knife handle also includes a latch that latches the guard when the guard is slid into the guarded position and a first button that disengages the latch. The guarded surgical knife handle includes a bias member that forces the guard in a proximal direction to an unguarded position when the latch is disengaged along with a second button extending through the slot used to slide the guard in a distal direction into the guarded position.

Abstract: A plurality of hand tools for use in a wide variety of different applications for applying masking tape to various surfaces prior to painting, staining, detailing, sanding and the like wherein one embodiment includes a removably attachable blade member associated with one end portion of the tool and a removably attachable roller member or nudger member associated with the opposite end portion of the tool, and an extension/retraction mechanism for extending and retracting the blade member. Another embodiment of the present hand tool includes a handle member adaptable for receiving any combination of removably attachable roller members, nudger members, and blade members for attachment to the opposite end portions of the handle member. A wide variety of different blade configurations, roller member configurations, and nudger member configurations can be removably attached to the opposite end portions of the present tools.

Abstract: A surgical knife handle comprising a handle body (102) and a blade receiving portion (104) defined at a first end of the handle body, which blade receiving portion comprises a blade receiving bore and a blade support (118) extending to a first side of the blade receiving bore. A surgical knife comprising a handle, a blade defined at a first end of the handle and a blade support extending to a first side of the blade.

Abstract: A power operated knife comprises a blade supporting structure supporting an annular blade for rotation about a central axis. The blade and blade supporting structure are engagable along bearing contact locations that are spaced apart in a direction parallel to the axis so that the blade is stabilized both radially and axially as the knife operates. The blade supporting structure comprises a split blade housing member that is radially expandable and contractible to receive the blade. The split blade housing member and blade engage along relatively short lines of bearing contact that serve to minimize friction and blade heating when the knife operates. The bearing locations are spaced apart both circumferentially around the blade perimeter and in the direction of the axis so that the blade position is stabilized during operation of the knife.

Abstract: A precision cutter is disclosed. The cutter is curvilinear in shape, and has an elongated handle with a blade projecting from the top end thereof, and a cap adapted to fit over the blade, the cap being so configured that when in place covering the blade, it provides the appearance of a unitary piece to the cutter. The handle has a weight positioned in it eccentric to the central axis thereof, so that when rolled on a flat surface the handle consistently returns to the same position relative to the flat surface.

Abstract: A utility knife is useful for operations such as glazing, roofing, carpeting and SHEETROCK™ drywall 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: 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 comprises an armoring element (1) of a knife haft, which has a bar (10) extending in an axial direction (100) and is connected to the tang (20) of a knife blade (2) using a connecting means (11). A secure, frictional connection in an axial direction (100) between the armoring element (1) and the knife blade (2) is formed by positive locking and/or material bonding between the connecting means (11) of the armoring element (1) and a corresponding counter piece (21) on the tang (20) of the knife blade (2). In an inventive method for producing a knife, the tang (20) and the armoring element (1) are coated with haft material, e.g. haft shells in the connected state. The haft material forms the actual body of the knife haft, wherein parts of the surface of the armoring element (1) may be disposed in the outer surface of the knife haft such that they are visible.

Abstract: A concave tapered food product includes a cross section and a second end having a shape defined by a generally concave arc and a generally convex arc. The concave tapered food product has a first side and a second side shaped by a longitudinal cut along the foodstuff. A cutter assembly for cutting a foodstuff to form the concave tapered food product includes a housing member. The cutter assembly also includes a curvilinear blade including a cutting edge for cutting the foodstuff, the cutting edge defining an arc along a first portion of the curvilinear blade and a foot positioned at an end of the curvilinear blade for supporting the curvilinear blade. The foot is configured for being received and secured in the housing member. The housing member is configured for at least partially enclosing the curvilinear blade.

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: The invention relates to an oscillatory drive having an output shaft that can be driven to perform a rotationally oscillating movement about its longitudinal axis and that comprises a free end, a holding fixture at the free end of the output shaft comprising a contact surface for attachment of a tool, a mounting section on the holding fixture, raised relative to the contact surface, that projects to the outside in the direction of the longitudinal axis and that is designed for form-locking connection with a mounting opening of a tool placed in contact with the contact surface, and having a securement for fixing the tool with its mounting opening on the holding fixture, the securement permitting the tool to yield in axial direction under the action of a torque, against a pre-stress, and the mounting section permitting the tool to rotate by a certain angle of rotation when the tool gives way axially.

Abstract: A jigsaw drive shaft is connected to a blade by the blade clamp of the present invention. The blade clamp comprises a clamp body mounted securely to the drive shaft by a bracket. The clamp body has a hollow portion formed to receive an upper portion the jigsaw blade. The clamp body also includes a hollow tubular extension. A cam body is pivotable about an axis through a cylindrical bore such that cam surfaces move in and out of contact with an interior surface of the clamp body to engage or release the blade. A spring biases the cam body into engagement with the clamp body surface. The user must press on a protrusion of the cam body to pivot the cam surfaces way from the clamp surface and against the force of the spring.

Abstract: A knife connector includes a base, a cover, a clamping device and a connecting stub. The base has a holding side, a knife-holding end, a connecting end opposite to the knife-holding end and a holding cavity. The holding cavity is defined in the holding side and has an opening defined in the knife-holding end. The cover is pivotally connected to the base to close the holding cavity. The clamping device is mounted on the base and holding the cover on the base to close the holding cavity. The connecting stub is mounted on the connecting end of the base and has a non-circular cross section and an engaging recess defined around the connecting stub. Accordingly, the knife connector can detachably and changeably connect a blade body to a handle to fit with different kinds of cutting tools.

Abstract: A film applicator which includes an applicator housing, an applicator blade positioned within the housing, a micrometer secured to the applicator housing and having a plurality of shafts and a plurality of magnets each having one end secured to a respective micrometer shaft and another end in releasable magnetic engagement with the applicator blade.

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: The present invention generally relates to a knife with a hook portion. In one aspect, a utility knife is provided. The utility knife includes a handle having a first end with an opening and a second end with a hook portion. The utility knife further includes a blade and a blade holder disposed in the handle. The blade holder is configured to hold the blade, wherein the blade holder is movable relative to the handle between an extended position where a cutting edge of the blade extends through the opening of the handle and a retracted position where the cutting edge of the blade is disposed in the handle. In another aspect, a method of operating a utility knife is provided.