Abstract: A utility knife includes a handle, a blade carrier, and a blade depth adjustment assembly. The blade carrier is mechanically coupled to the handle and configured to support a blade. The blade depth adjustment assembly is mechanically coupled to the handle and configured to permit a user of the utility knife to reposition components of the blade depth adjustment assembly to select one of a plurality of blade depth positions which causes the blade carrier to be repositioned along the handle depending upon which of the blade depth positions is selected.

Abstract: A cutting hand tool which allows easy cutting of thin materials, such as film, paper, packaging or other flexible materials even if the material is folded or stretchy such as shrink- or stretch-wrap, without requiring a strong force, while at the same time protecting the user from injuries. The cutting blade is placed in a recess to prevent accidents and can be rotated or laterally moved by activating a trigger so that an additional force can be applied to cut the material whenever this is required to continue the cutting motion, when the material is rolled over, folded, bunched or reinforced and therefore requires an additional cutting force.

Abstract: A knife includes a handle that includes a gripping surface; a blade slide positioned in a recess of the handle that extends from an opening of the handle through a cavity within the handle; a blade coupled to the blade slide near a proximal end of the blade and extending through the recess and into the opening when the blade slide is in the retracted position; and a guide coupled to the blade near a distal end of the blade opposite the proximal end, the guide including a contoured surface configured to engage a workpiece to extend the blade slide a distance from the retracted position to an extended position such that the blade is extended from the opening of the handle, the blade slide biased to move from the extended position to the retracted position.

Abstract: A cutter formed by detachably attaching a replaceable blade to a cutter body. The cutter body can include a main body block and slide block. The main body block includes a main body supporting section supporting the replaceable blade back face, and a main body connecting section connecting with the replaceable blade from the front face side. The slide block includes a rear side supporting section supporting the replaceable blade back face, a slide connecting section connecting with and retracting the replaceable blade toward the rear side, and a back side protruding section protruding on the back side in a thickness direction. When attached, the replaceable blade elastically deforms to curve in the thickness direction, the slide block presses toward a main body block side in the thickness direction by elastic force of the replaceable blade, and the back side protruding section engages with a main body block engaged section.

Abstract: A utility knife comprises a body with a knife blade storable within the body and one or more magnets coupled to the knife body. The magnets are able to be embedded within the body or embedded with an adapter that is configured to removably couple with the utility knife. In some embodiments, the knife blade folds out from a side of the body and into an operable position. Alternatively, in some embodiments, the knife blade slides out of a top of the body and into the operable position. The utility knife is able to magnetically couple with a base comprising a magnetically attractable surface. The utility knife is securable to the base in a vertical orientation and a horizontal orientation.

Abstract: A surgical knife safety handle device comprises a handle body being essentially solid. A movable guard engages with the body for longitudinal movement between an extended position and a retracted position. The guard encloses a knife blade. The operation is an intuitive push/pull to extend or retract guard. The guard is formed of a clear material with a low profile that does not interfere with vision in use. The guard includes a leaf spring. The spring has a hemispherical protrusion on its underside that engages with a slot on the handle for positive engagement and an audible “click” when it seats.

Abstract: A retractable telescoping utility knife having a handle having a first cover and a second cover detachably coupling together, a blade shell telescopically slidable contained in the handle and having a first shell and a second shell detachably coupling together, a blade seat slidably contained in the blade shell, a blade having installation notches and installed on the blade seat, an actuator having a neck formed on the blade seat, a blade shell control mechanism, and a blade change means.

Abstract: A cutter apparatus includes a housing sized to be hand-held, the housing including a channel and openings adjacent to the channel at three different sides of the housing, and a blade carrier sized to fit within and slide along the channel, the blade carrier including three engaging portions that extend from the openings such that a force bearing upon any of the portions can cause the blade carrier to slide along the channel.

Abstract: A safety knife comprises a knife body (10), a blade carrier (16) movable within the knife body (10) between a retracted position and an extended position, biasing means (24) urging the blade carrier (16) towards its retracted position, latch means to latch the blade carrier (16) in its extended position, and a weight (36) movable along a passage (32) relative to the knife body (10) and engageable with release means (40) to release the latch means.

Abstract: A utility knife includes a first handle portion and a second handle portion removably coupled to the first handle portion to define a housing. The first handle portion includes a first bore and the second handle portion includes a second bore. The utility knife also includes a blade carrier slidably received within housing and a blade removable coupled to the blade carrier for movement with the blade carrier relative to the housing. The utility knife also includes a double-lead fastener including a head, an unthreaded portion received within the first bore, and a double-lead threaded portion received within the second bore to couple the first handle portion and the second handle portion.

Abstract: A cutter apparatus includes a housing shaped to be hand-held, a slider configured to support a front blade, the slider being mechanically coupled to the housing and configured to be moved longitudinally along the housing, and a blade guard mechanically coupled to the housing and configured to be extended and retracted adjacent to the front end of the housing, wherein the slider and the blade guard are configured to move in tandem.

Abstract: A scalpel enabling both safe blade engagement or disengagement and safe passing among personnel during surgical procedures. The blade arm assembly of the scalpel is positionable in three positions, including a retracted position, an operational extended position and a fully extended position for engagement and disengagement of the blade.

Abstract: A bladed tool includes a handle and a blade with a surface-engaging edge and a blade-retaining shank. The handle includes an elongated handle body having longitudinally opposed body front and rear ends, and at least one side wall extending between the body front and rear ends. The side wall defines an outer surface configured for gripping by a user and an inner surface that defines an interior access channel extending from an access opening in the body rear end toward a forward channel wall located to the rear of the body front end. Situated between the body front end and the forward channel wall is a handle core that defines a shank-retaining slot extending between a forward slot-opening in the body front end and a rearward slot-opening in the forward channel wall. The shank extends rearwardly through the shank-retaining slot such that a protruding shank portion extends to the rear of the forward channel wall.

Abstract: A knife includes a handle that includes a gripping surface; a blade slide positioned in a recess of the handle that extends from an opening of the handle through a cavity within the handle; a blade coupled to the blade slide near a proximal end of the blade and extending through the recess and into the opening when the blade slide is in the retracted position; and a guide coupled to the blade near a distal end of the blade opposite the proximal end, the guide including a contoured surface configured to engage a workpiece to extend the blade slide a distance from the retracted position to an extended position such that the blade is extended from the opening of the handle, the blade slide biased to move from the extended position to the retracted position.

Abstract: A utility knife includes a handle, a blade holder assembly, and a clamp assembly. The blade holder assembly is constructed and arranged to hold a blade at a position of use at one end of the handle. The clamp assembly is constructed and arranged to move between a clamp position wherein the clamp assembly applies a clamp force to side surfaces the blade and a release position wherein the clamp assembly releases the clamping force.

Abstract: A cutter apparatus includes a housing, multiple tools mechanically coupled to the housing, at least one of the tools including a cutting device, and a slider and lock wheel mechanically coupled to the housing and configured to selectively release only one of the tools at a time from being secured within the housing.

Abstract: A sliding blade knife has an elongated frame-like handle. A blade is longitudinally positionable relative to the handle and is transformable between a stable extended and a stable retracted position relative to the handle. An exteriorly accessible button is depressible to allow the blade to be transformed between the retracted positions and the stable extended position. In the extended position, the blade projects outwardly of the handle for usage.

Abstract: A cutting device with an auto-retractable blade, having a housing containing an active blade extendable from a front aperture thereof and a spare blade box therein. An actuator is provided being fixed to an actuator seat contained in and slidable with respect to the housing. The actuator seat has a side protrusion having a front dent defined therein. A blade seat is slidably contained in the housing. The blade seat has an upper fulcrum, a side protrusion, a side blocker, a blade installation plate, a lower fulcrum, and a blade seat return spring. The side protrusion has a front slope and a back tip which is receivable in the front dent of the actuator seat.

Abstract: A safety cutting device includes a slidable insert that moves longitudinally within a cavity of a housing. The slidable insert has a cutting blade attached and moves within the housing from a safe position in which the blade is covered to an exposed position for cutting. The safety device has a release button positioned near an anterior end of the housing. A biasing member automatically retracts the blade when the release button is activated.

Abstract: The present invention generally relates to a pocket cutter. Specifically, embodiments of the present invention relate to a pocket cutter apparatus with a retractable blade. Embodiments of the pocket cutter apparatus are further comprised of a thumb slider switch.

Abstract: An out of front knife with an assisted opening mechanism has a handle, a blade mounted in the handle, a thumb stud that drives the blade, and an extending assembly that assists with extending the blade out of the handle. With two sliders and two springs of the extending assembly, only when the blade is intentionally pushed to move a preset distance and overcome a preset resistance, one of the springs pulls and assists the blade of the out of front knife to extend out of the handle. Therefore, the out of front knife with the assisted opening mechanism is used safely.

Abstract: The present invention generally relates to pen cutters. Specifically, embodiments of the present invention relate to a pen cutter apparatus with an auto-retractable blade. Embodiments of the pen cutter apparatus are further comprised of a tether-hole and a blade slider button.

Abstract: A utility knife configured to provide a user with a variety of configurations. The utility knife includes first and second handle members configured to move relative to one another between open (e.g. unfolded) and closed (e.g., folded) positions. The knife further includes a retractable blade within the second handle member. The retractable blade may be moved between a retracted position, wherein most, if not all, of the blade is maintained within the second handle member, and an extended position, wherein a portion of the blade is exposed. The knife is configured to allow the blade to be in retracted and extended positions when the first and second handle members are in either the unfolded or folded positions.

Abstract: A multi-purpose utility tool which may include an elongated body member configured to slidably house a tool bit mounting device inside of the body member. The body member may be operable to receive the tool bit from within the body member and to expose the tool bit for use outside of the body member. The tool may also include a support device slidably cooperating within the body member. The support device may cooperate with the mounting device for rotatably holding the mounting device within the body member. In addition, the tool may include a locking device which also slidably cooperates within the body member. The locking device may also slidably mate with the support device and lock the support device within the body member at a desired location within the body member.

Abstract: The utility knife blade is a blade for a utility knife having a slot formed in the blade that is especially useful when scoring drywall. The slot may engage a tape measure adjacent the tape hook so that the cutting edge at the scoring tip of the blade extends below the tape measure hook to engage the sheet of drywall. The slot extends through the cutting edge into the body of the blade at a slight angle relative to normal, preferably about 10°. The blade has a slot at each end so that the blade may be reversed when one end is dulled or broken. The blade has an otherwise standard configuration, typically having a trapezoidal body with a cutting edge extending along the longer parallel edge and a pair of notches in the shorter parallel edge for engaging knife holder retainer pins in the slidable utility knife holder carriage.

Abstract: A knife has a housing, an operating part shiftable on the housing between advanced and retracted positions, and a blade holder connected to the part and carrying a blade. The holder is shiftable on the part between offset first and second cutting positions with the blade projecting from the front end and a safety position with the blade recessed in the housing rearward of the front end. A spring biases the holder into the safety position. A brace element can shift between a position braced between the blade holder and the housing in the first cutting position and a position out of engagement with the blade holder or the housing in the second cutting position. The brace element when engaged holds the blade in the first cutting position but in the second cutting position is disengaged so the spring returns the holder to the safety position.

Abstract: A hand cutter with a blade guard providing the highest possible protection from accidental cutting. The blade guard can be effortlessly activated from the locked position by a trigger, which is achieved by closing the hand around the cutter handle. The released blade guard remains in the released state until the blade has been put to use by cutting the object, when the blade guard release is removed so that the blade guard is automatically relocked as soon as the blade guard returns to the initial protected position.

Abstract: Pocket safety cutter devices include ergonomic blade housing and handle portions adapted to be safely folded together into compact closed configurations.

Abstract: A knife is provided that includes a replaceable blade element. The knife employs a blade carrier that is fixedly interconnected to or foldable with respect to a handle. The blade carrier selectively receives the replaceable blade element that is locked into the blade carrier by way of a hook and movable pin combination. The replaceable blade element is designed to be inserted within the blade carrier quickly, easily, and safely.

Abstract: A knife has a blade holder in a housing adapted to hold a blade and shiftable between a first cutting position with the blade projecting a little from the housing and a second position projecting somewhat more from the housing. An actuating element shiftable in the housing between a starting position and an actuating position is effective on a connecting linkage such that in a first orientation force is transmitted to the blade holder to retain the blade holder against moving into its retracted safety position from its first cutting position and in the second orientation the linkage does not prevent the blade holder from moving into its safety position from its second cutting position.

Abstract: Specific embodiments of the present invention are directed to blade holders, which provide an easier method to cut by way of including a guide incorporated into the handle. This guide rests upon the surface to be cut, leading the cutting blade. Furthermore, the leading end of the tool is blunt, which is safer than leading with a sharp edge. In specific embodiments, the handle is of such a shape that the user can pull the tool straight back to cut, allowing the hand to rest in a more neutral and ergonomic position.

Abstract: A utility knife includes an elongaged handle having an internal cavity, two opposing ends and a side having at least one locking opening. A shuttle is sized to slide within the cavity and has a side surface. The shuttle has a spring-loaded locking button projecting from the side surface and into the handle. The button is sized and shaped to selectively project into the at least one locking opening. The shuttle is bonded to a conventionally shaped utility knife blade of the type which includes two opposing cutting regions. The shuttle can slide within the handle between the two opposing ends so that both cutting regions of the blade can be easily used as necessary. This utility knife is meant to be lost cost and disposable, but offers the user TWO cutting edges, doubling its effective use.

Abstract: A retractable knife with a multistage positioning function has a handle, a blade slidably mounted in the handle, and an operating assembly connected to the handle and the blade. The handle has a guiding panel with a guiding hole and multiple pairs of positioning recesses formed in an inner sidewall defined around the guiding hole. The operating assembly has a guiding rod with a positioning head selectively engaging between one of the pairs of the positioning recesses. The blade is capable of protruding out of the handle with a multistage function for the convenience of using the knife. Since a resilient element pushes the guiding rod to allow the positioning head to abut the guiding panel, the blade does not easily slide out of the handle, so the knife can be used safely.

Abstract: A utility knife has a handle generally defining a handle axis and a remote end provided with an opening. A carriage is slidably mounted within the handle for selective movements through the opening between a retracted position in which the carriage is substantially fully received within the handle and a fully extended position in which the carriage is fully extended through the opening to increase the effective length of said handle by a distance ?l. A blade mounted on the carriage shares the movements of the carriage and has an operative portion that can fully penetrate a work to be cut when the handle axis is inclined at an angle ? relative to a surface of the work. A finger of a user most proximate to the work surface is positionable a distance h above the work surface during normal use of the utility knife, ?l and ? being selected so that the distance ?l is generally greater that 1.0 inch and the angle ? is equal to at least 35°.

Abstract: A knife comprising a housing and a rotating blade carriage pivotably associated with the housing. The knife further includes a compartment in which a plurality of blades can be stored and later advanced from the housing for performing a cutting action, the first end of the blade being exposed. The rotating blade carriage can be rotated with respect to the housing and placed in a second position so that the opposite end of the same blade is exposed for performing a cutting action when advanced. The rotating blade carriage can be selectively locked in the first or second position. A carriage locking lever can be accessible for unlocking the rotating blade carriage for blade reversal. When removal of the used or worn blade is desired, the knife can have one or more blade release members that allow the disengagement of the blade from the knife so that the user can manually remove the blade without the requirement of disassembly or partial disassembly of the knife.

Abstract: A utility knife includes a handle, a blade holder assembly, and a resilient blade wiper. The handle includes an opening at a front end. The blade holder assembly is constructed and arranged to hold a blade at a position of use wherein the blade projects through the opening at the front end of the handle, and to retract the blade into the handle. The resilient blade wiper is constructed and arranged to be positioned toward the front end of the handle. The blade wiper is constructed and arranged to remove debris from side surfaces of the blade when the blade is retracted into the handle.

Abstract: A shielded knife includes a base, a blade secured to the base at a first end and a guard operatively attached to the blade at a second end opposite the base. The guard may be rotated between a closed position covering a sharpened edge of the blade and an opened position exposing the sharpened edge of the blade.

Abstract: A utility knife has a receiving cavity which opens through the body. A cartridge comprising a magazine of blades is removably insertable into the receiving cavity. A carrier within the body is manually operable for receiving a blade from the cartridge and positioning the blade for extension through the opening to present a cutting edge. The cartridge may be released from the utility knife body by depressing a button and withdrawing the cartridge. The cartridge is releasably held in place within the knife body and releasable when the blade carrier is in its retracted position and the release button is depressed. When the thumb button moves the blade carrier into its extended position to expose the knife blade, the cartridge is rendered unreleaseable even if the release button is depressed.

Abstract: There is provided in a preferred embodiment of the present invention a multifunction safety knife having two cutting positions. The knife includes a head having a protected lower opening and a frontal opening. A bottom cutting edge of a blade is exposed by the protected lower opening and a front cutting edge of the blade is selectively exposed by the frontal opening. The head further includes a pointed hook for puncturing film prior to cutting a length of it.

Abstract: In general, it can be appreciated that the specific type of knife is an “Out the Front” (OTF) knife whereby the blade is operatively configured to reposition longitudinally forwardly with respect to the handle. The handle in general has an interior surface forming an interior chamber. In addition to the handle and blade, the knife further includes a stored energy mechanism. In general, the stored energy mechanism permits the OTF knife to operate with assisted opening technology with a linear-actuating-type system. Described herein are a few embodiments by way of example of the broadly claimed concept, and it can be appreciated that numerous types of assisted opening technologies, such as a stored energy mechanism, can be incorporated.

Abstract: The invention relates to a knife comprising a housing (11) and an actuator (14) that can shift a blade holder (13) carrying a blade (47) in the housing (11) between at least one safety position and at least one cutting position, the blade holder (13) being tensioned by a spring (35). The characterizing feature consists in the fact that the spring (35) is attached to the housing (11) and to a first entrainment formation (25), and that a second entrainment formation (46) is associated with the blade holder (13), which second entrainment formation can be releasably engaged with the first entrainment formation (25) such that the first entrainment formation (25) can be moved by the second entrainment formation (46) from the safety position to the cutting position by movement of the blade holder.

Abstract: A box cutter includes a housing with a blade slide slidably received therein. A pivotal member is pivotably connected to of the blade slide. An inclined face is defined in one of surfaces of the pivotal member and is gradually raised. The inclined face is connected to a pressing area which has two respective rounded guide portions. A spring is connected between the pivotal member and the housing to maintain the blade slide at the initial position. A button is slidably connected to outside of the cover and a spring is connected between the button and the cover. The button is moved to move the blade slide from the initial position thereof to an extended position. When the blade is cutting a workpiece, the blade is tilt and the pivotal member is pivoted by the cover so that blade slide is retracted into the housing.

Abstract: A cutter with a slider that can be pushed from two directions has a housing, a blade holder, a slider and a blade. The slider is mounted moveably on the housing, is connected to the blade holder and has an upper sliding element, a lower sliding element and a resilient tab. The upper sliding element has an L-shaped cross section to form a top wall and a side wall corresponding respectively to a top wall and a side wall of the housing. A guiding recess is defined by the side wall of the upper sliding element to slidably receive a portion of the side wall of the housing that forms an edge of a guiding channel. Accordingly, the cutter is convenient in use.

Abstract: A cutting device with an auto-retractable blade, having a housing containing an active blade extendable from a front aperture thereof and a spare blade box therein. An actuator is provide being fixed to an actuator seat contained in and slidable with respect to the housing. The actuator seat has a side protrusion having a front dent defined therein. A blade seat is slidably contained in the housing. The blade seat has an upper fulcrum, a side protrusion, a side blocker, a blade installation plate, a lower fulcrum, and a blade seat return spring.

Abstract: A utility knife includes a handle, a blade holder assembly, a spare blade carrier, a spare blade dispenser, and an actuator. The blade holder assembly is constructed and arranged to hold a blade at a position of use at one end of the handle. The spare blade carrier is disposed in the handle, and is configured to carry a plurality of spare blades. The spare blade dispenser is constructed to separate one of the spare blades from the plurality thereof and present the one separated blade to the user. The actuator is operatively associated with the blade dispenser, wherein movement of the actuator moves the blade dispenser to separate the one spare blade from the plurality to present the one separated blade to the user.

Abstract: A utility knife includes a handle having a blade track system with a pivot point and a blade mounted in the blade track system. The blade includes a cutting/scraping edge extending along a side of the blade. In an implementation, the blade is shiftable between a closed configuration, where the cutting/scraping edge is enclosed within the handle, to a first open configuration, where the blade extends longitudinally outward from an end of the handle. The shift between the closed and first open configurations can occur by rotating the blade about the pivot point and in the blade track system. Also, the blade is shiftable along the blade track system between the first open configuration and a second open configuration, where the blade is located towards another end of the handle such that the cutting/scraping edge extends downwards from a bottom of the handle.

Abstract: An assisted-opening knife has a spring tied to a front of a blade carrier and a movable slider assembly within a slot formed through the blade carrier, so that a blade can be rapidly extended by the elastic force without going through stepwise movement. An expanded portion of the slot engaging the slider assembly allows the blade to be received in a holder and ejected only when the slider assembly fully disengages from the expanded portion, thereby generating no sudden ejection of the blade. Additionally, a safety latch securely locks the blade when the blade is fully retracted. When the blade is fully extended, a stopper engages the slider assembly to prevent the blade from being retracted during cutting and stabbing. Accordingly, the assisted-opening knife addresses a solution to rapidly extend the blade for cutting and stabbing without compromising the safety considerations.

Abstract: A safe utility knife is provided having a housing, a blade sliding seat, a pushing force generator, an acceleration detector, a stopper, a stopper pushing portion, and a sliding switch. When activated with a blade protruding out, and an acceleration due to a sudden dropping movement occurs, the acceleration detector moves from a low acceleration position to a high acceleration position. It also presses down the sliding switch and the stopper so that the stopper moves from a locking position to a non-locking position. The blade sliding seat is pulled by the pulling force generator to a blade storing position to protect against accidental injury. The knife can be operated by one hand and is suitable for regular blades available on the market. In addition, it can be switched to manual automatic blade returning mode.

Abstract: Certain exemplary embodiments can provide a retractable blade knife, which can comprise a handle and a blade. The handle can comprise a top handle scale operatively coupled to a bottom handle scale via a plurality of fasteners. The retractable blade knife can comprise a large coil spring adapted to cause the blade to thrust out from a first partially extended position to a second partially extended position.

Abstract: There is provided in a preferred embodiment of the present invention a multifunction safety knife having two cutting positions. The knife includes a head having a protected lower opening and a frontal opening. A bottom cutting edge of a blade is exposed by the protected lower opening and a front cutting edge of the blade is selectively exposed by the frontal opening. The head further includes a pointed hook for puncturing film prior to cutting a length of it.