Abstract: A double-ended utility knife having a housing or handle including an elongated, generally rectangular base member with a first end, a second end, a front side, and a back side is disclosed. The front side of the base member has a front compartment and a cover and the back side has a back compartment with a cover where the covers are attached to the front and back sides, respectively. Each of the compartments and covers extends less than the total length of the base member and is located at opposite ends of the base member. Each cover is secured to the base member by its own screw so that only one cover need be removed in order to replace a blade. Blades extend from both ends of the housing and have their own actuator so that each blade may be extended or retracted independently of the other.

Abstract: A cutter for face cutting of carpeting is provided. The cutter includes a floor engaging base and a plate attached to the floor engaging base which is slidable along an inclined path forming an acute angle with the base to form between the movable plate and the base a forwardly facing carpet receiving slot having a longitudinal central axis. A downwardly and rearwardly inclined cutting blade disposed in a plane which is parallel to and spaced to one side of a longitudinal central axis of the carpet receiving slot spans the rear end of the carpet receiving slot at the same acute angle as that formed by the inclined path of the floor engaging base, and is secured in a blade housing having an open-ended slot to provide easy access for adjustment, removal, and replacement of blades. Also provided are coacting bearing surfaces for securing the lowermost end of the blade against deflection, and cutouts for preventing an accumulation of debris around the lowermost corner of the blade.

Abstract: A knife includes two housings having a front portion for engaging with blades. One of the housings includes a projection formed in the front portion for engaging with a depression of the other housing so as to secure the front portions of the housings together. A rod is rotatably engaged in the rear portion of one of the housings. A cap is secured to one end of the rod, and a spring biases the cap to engage with the rear ends of the housings so as to secure the rear ends of the housings together. The housings can be secured together without additional tools.

Abstract: A hand held cutter which is able to facilitate users to easily replace a blade received therein. The users will only need to push a pusher, then an upper cover and a lower cover of the hand held cutter are easily separated. The upper cover and a lower cover of the hand held cutter are assembled by pressing down a pressing knob, which initiates a secure attachment relationship between the upper cover and the lower cover.

Abstract: An easy scratch pen tool including an elongated housing member that has an interior hollow. The interior hollow extends the length of the housing member. The housing member has a slot for providing an entry into the hollow. Also, a cap member is mounted to the housing member. The cap has a cap hollow for positioning of a button rod with a coiled spring within. The button rod has a button tip projecting outwardly form the cap member. Lastly, an elongated scratcher member is provided. The scratcher member has a flat end and a scratcher tip. The flat end of the scratcher is in communication with the button rod of the cap.

Abstract: An automatically retractable utility knife includes a housing and a blade carrier having an integrally molded return spring. The return spring is serpentine shaped and constructed of a resilient thermoplastic. A method of manufacturing a utility knife includes the steps of providing a housing having an interior adapted to receive either an indexed blade carrier or an automatically retractable blade carrier, and assembling the housing with either an indexed blade carrier or an automatically retractable blade carrier therein.

Abstract: A utility knife having replaceable blades is provided having a handle with an exterior surface and an interior. A slide member is slidingly mounted in the interior of the handle. A blade is removably mounted to the slide member such that, in a first position, the blade is contained completely within the handle and, in a second position, the blade extends partially out of the handle. A shell is hinged to the handle at the exterior surface. The shell includes a central cavity shaped to receive replacement blades. Further, a utility knife having replaceable blades is provided having a handle with a first casing and a second casing. A hinge member is mounted to the first bottom edge and the second bottom edge such that the first casing can be rotated with respect to the second casing from a closed position to an open position. A slide beam is slidingly mounted on the first casing. A blade is removably attached to the front end of the slide beam.

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

Abstract: A safety knife comprises a main body formed with a slot having a narrow open mouth, into which the material to be cut is inserted, and a blade mounted on the main body with a portion of its cutting edge extending across the slot at a location spaced inwardly from the mouth of the slot. The blade is mounted in a recess in the main body for sliding movement across the slot, against the action of a spring, and is coupled to a sleeve which is slidable on the main body. The user holds the knife by the sleeve so that, as the knife is used to cut material, the relative movement between the sleeve and main body causes to blade to slide across the slot, thus enhancing the cutting action.

Abstract: A rotary cutter including a handle, a cylindrical head formed on one end of the handle and having a planar surface on each side, the handle and head having an interval cavity, an actuating member mounted in the cavity in the handle and head, a blade support formed on the actuating member for movement between a storage position and one of two operating positions with respect to the head, a spring mounted on the actuating member for biasing the actuating member to ta storage position and a latch assembly formed in the actuating member for electively locking the actuating member in one of the two operating positions.

Abstract: A combination guarded surgical scalpel and blade stripper (200, 300) uses the sliding guard (202, 301) in cooperation with an ejector button (238, 311) to strip a (used) blade (224, 314) from the scalpel (200, 300) thereby avoiding manual contact with the blade (224, 314) and the problems associated therewith.

Abstract: A retractable blade utility knife is provided with storage for spare blades within the knife handle and a knife blade carrier that can be actuated to an operative position in a direction longitudinal to the knife housing, and to a knife blade loading position in a direction transverse to the knife housing, without disassembly of the knife housing. An externally accessible button extends from an L-shaped slot through a housing shell of the knife and allows for actuation of the knife blade carrier from a loading position to an operative position in one continuous motion. The externally accessible button is connected at its proximal end to a flexible arm on the blade carrier. The distal end of the flexible arm of the blade carrier has a transversely extending lip that selectively engages with longitudinally spaced notches on horizontal ribs extending from the inside surface of the knife housing shell.

Abstract: This invention relates to an improved guarded surgical scalpel having a movable guard that can be retracted to expose the blade and that can be extended to cover the sharp cutting edge of the blade. The guard is telescopically mounted inside the blade handle and includes a deflectable top wall portion that holds a detent pin. This detent pin engages a slot having upturned ends that is formed in at least one side wall of the blade handle. The detent pin is biased upwardly into the upturned ends to hold the guard in the retracted or extended position.

Abstract: A surgical knife for use in ophthalmic surgery includes a bladeholder assembly holding a surgical cutting blade, with the bladeholder assembly sliding into and out of a hollow knife handle, and a plunger mechanism manually operable to move said bladeholder assembly to a position where the cutting blade is exposed and usable for surgery. The knife also includes a depth of cut control which sets the depth to which the blade is used to make an ocular incision and which allows the plunger mechanism to extend and retract the bladeholder assembly without changing the depth of cut. A modified micrometer scale allows the depth of cut to be conveniently changed by a given distance without recalculating the cutting depth.

Abstract: A utility knife/box cutter includes an ergonomically-shaped handle portion with exterior stippling to provide a good grasp upon the knife. Within the handle portion, a channel member is received in a forwardly extending cavity and movably receives a cutting blade carrier for longitudinal movement relative to the handle portion. A cutter blade carried in the blade carrier is moveable between a storage position entirely within the handle portion and successively further forward use and replacement positions. Also received into the handle portion is a spare blade holder member pivotal between a blade retaining position entirely within the handle portion and a blade releasing position in which a forward part of the spare blade holder member is pivoted out of the handle portion to present spare blades for removal and transfer to the cutting blade carrier.

Abstract: A utility knife includes a handle having a rod slidably engaged in the front portion. A knife blade is engaged between two boards. A plate is secured to the boards and has a rear portion for engaging with the rod. A spring biases the rod to engage with the plate. The plate may be disengaged from the handle when the rod is moved away from the plate against the spring. The boards are slightly extended outward of the handle for allowing the user to grasp the boards and for disengaging the knife blade from the handle without contacting with the knife blade.

Abstract: A mounting/carrying device for blades includes a shank having at least one receiving compartment longitudinally extending therethrough for receiving a blade therein and a guiding slot longitudinally extending in one lateral side thereof and communicated with the receiving compartment, a retainer plate provided in the receiving compartment and comprising a groove defined in a first side thereof for receiving a blade end portion of the blade, a fastener element for securely fastening the blade to the retainer plate, and an accommodating compartment having an open end for receiving replacement blades therein. The groove of the retainer plate includes first and second groove sections defined in one side thereof, the first groove section being straight while the second groove section being at an angle with the first groove section.

Abstract: A utility knife having a body portion with a mouth at its front end. A finger piece is provided for moving the blade forward so that it extends from the body portion through the mouth. A spring is provided to retract a blade to a position within the body portion when the finger piece is released. An open hook is provided to stop the forward movement of the blade. The open hook is part of the finger piece and is located rearwardly of the finger piece. The hook strikes a portion of body portion to stop the forward movement of the blade.

Abstract: A retractable "ball-pen" like tool/scalpel, provided with a latch mechanism, is automatically retracted when not in use by pushing the latch mechanism and is extended when in use by pushing a tool/blade support member of the tool/scalpel. The latch mechanism is engaged with the tool/blade support member when the tool/blade support member is pushed to an operative position wherein a tool/blade is exposed from a sheath member. The latch mechanism is pushed transversely and disengaged with the tool/blade support member whereby the tool/scalpel is retracted into the sheath member.

Abstract: A surgical scalpel (100) is provided with a retractable guard (107) for its cutting blade (106). The guard (107) is mounted on the handle (101) of the scalpel (100) for sliding movement between an advanced position in which the blade (106) is covered and a retracted position in which the blade (106) is exposed. The guard (107) may be moved with one hand, and without requiring the surgeon, nurse and/or assistant to take his or her eyes away from the patient or the instrumentation during a surgical procedure. A two-position resiliently-biased manually-releasable detent means (113) is provided between the handle (101) and the guard (107). A closed longitudinal slot (122, 123) on the guard (107) cooperates with a pin (121) on the handle (101) to limit the sliding movement of the guard (107) independently of the detent action therebetween and accommodates the mechanical loading forces.

Abstract: A retractable surgical blade includes a handle defining a channel and a surgical blade member. The surgical blade member includes a body to which is secured a surgical blade. The body has a portion which engages the channel so that the surgical blade member can move from a cutting position in which the surgical blade projects from the handle and can be employed in a surgical procedure to a retracted position in which the surgical blade is disposed in the channel. When in the retracted position, the surgical blade is unable to cut or stab persons associated with the surgical procedure. The device further includes cooperating locking members on the handle and the body to position the surgical blade member in the desired position. An associated method of performing a surgical procedure is also disclosed.

Abstract: A surgical scalpel has a retractable sleeve. An elongated handle with a contoured grip portion is releasably attached to a blade holder securing a surgical blade. The blade holder is secured to the handle by a hook and groove assembly and a male to female connection. The sleeve slides between an extended position and a retracted position on the handle and blade holder. The extended position of the sleeve covers the blade thereby protecting operating room personnel. An arch on the sleeve contacts the hook and disengages the hook out of the groove to facilitate removal of the blade holder.

Abstract: A utility knife is provided which includes a unitary, blade carrier which acts to restrain the blade during heavy use and which prevents the blade from disengaging from the knife. The blade carrier includes a blade support portion, a blade retaining flange for retaining a first edge of the blade, and at least one laterally extending post for receiving a corresponding notch or notches in the blade when the blade is mounted on the blade carrier. The post has a profile which engages the notch in the blade when the blade is subjected to a lateral or twisting force to prevent the blade from disengaging from the blade carrier during use. In this manner, the post on the blade carrier performs the dual function of providing both longitudinal as well as lateral restraint for the blade.

Abstract: A cutter knife with a detachable blade includes an elongated case slidably receiving a control member which has a blade held thereon in a partial top-opening through space defined in an upper portion thereof and enclosed by an end cap at a tail end thereof. The cutter knife further has a retaining element adapted to hold blades thereon and slidably received in a space defined in a lower portion of the case. The control member includes a spring biased button movably coupled to the base, a resilient latch element on a lateral side thereof for resiliently engaging with a saw-teeth formation formed on the case to serve as an auxiliary locking device, and a spring biased locking element movably retained in the base and actuated by the button to selectively engage with teeth of the saw-teeth formation formed in the case and thereby locking the control member and the blade at a desired position.

Abstract: A safety cutter is provided to prevent un-actuated blade release. The cutter comprises a housing within which a slidable blade can be completely concealed. The blade is connected to a sliding member which controls blade movement in and out of the housing. A safety device is provided having a handle, a main plate and protuberances on the sides such that the sides of the safety device are complementary to the sides of an opening made on one surface of the cutter along which sides the sliding member is movable.

Abstract: A utility knife includes a hollow handle, for retractably housing a blade mounted on a blade carrier. The blade carrier is pivotally coupled to an actuator. A user can extend or retract the blade through a front slot by depressing an actuating button and sliding the actuator along an actuator glideway and blade carrier along a carrier glideway to a desired position. Once in the desired position a resilient member on the actuator urges protrusions on the actuator into engagement with detents provided within the handle. The blade carrier glideway is provided in an non-parallel orientation with respect to the actuator glideway to obtain a beneficial force transmission to the actuator that tends to maintain engagement between the actuator and the detents. A blade guard at least partially surrounds the front slot to resist upward forces on the: blade during cutting, while a carrier guard contacts a portion of the cutting edge of the blade within the handle to protect the carrier from damage by the blade.

Abstract: A combination guarded surgical scalpel and blade stripper (200, 300) uses the sliding guard (202, 301) in cooperation with an ejector button (238, 311) to strip a (used) blade (224, 314) from the scalpel (200, 300) thereby avoiding manual contact with the blade (224, 314) and the problems associated therewith.

Abstract: A cutter includes a movable blade, a handle and a slider. The movement of the slider causes the blade to move between an extended cutting position and a retracted storage position. The slider includes one projection which is pressed against a surface of the blade so as to frictionally engage the blade for preventing its free rotation or movement during the cutting operation.

Abstract: A lightweight, slender knife having a replaceable, retractable cutting blade, which may be locked either in the operating or deployed position, or in a retracted or safety position, by using a single digit on one hand, is described. Safety of hospital personnel and medical waste-disposal personnel is achieved in the surgical scalpel embodiment of the present knife without loss of function or convenience of the scalpel. An automatically retracting embodiment of the knife is also described.

Abstract: The invention relates to scalpels. By their nature, scalpels are exceedingly sharp, and there is the growing requirement of the provision of a guard over the blade at its point of manufacture to eliminate risk to the operative removing the scalpel from its packaging. With guards known hitherto, it is common practice to replace the guard over the blade after use. However, this introduces the risk of a used scalpel being mistaken for an unused scalpel. The objective of the invention is to avoid this possibility, an objective met by a construction comprising a handle and a blade secured to one end of the handle, and there being a blade guard attached to the scalpel by a frangible tether, the guard having a further means to engage a co-operating part of the scalpel, said further means in conjunction with said frangible tether serving to hold the guard in place over the blade.

Abstract: A three-piece knife having a replacable, retractable cutting blade, which may be locked either in the operating or deployed position, or in a retracted or safety position, by using a single digit on one hand, is described. Safety of hospital personnel and medical waste-disposal personnel is achieved in the surgical scalpel embodiment of the three-piece knife without loss of function or convenience of the scalpel.

Abstract: A holder for conventional rectangular cabinet scrapers having a body shaped like an open scroll, pivoting structures within each scroll-like end of the body to grasp a scraper blade along a substantial portion of its entire end, and a centrally located padded pressure plate adjustable with a thumb screw to apply pressure to one face of the cabinet scraper in order to bow it away from the body.

Abstract: An automotive vehicle that is powered by an electronically-controlled engine, such as a truck that is powered by an electronically-controlled diesel engine, is equipped with dual sets of controls, one set on each side of the vehicle. The accelerator pedal of each set operates a corresponding accelerator pedal sensor, and the two accelerator pedal sensors are coupled with an electronic controller of the engine by a coupling circuit that includes diodes for blocking current flow from each sensor to the other so that neither sensor can impose a load on the other that would impair the accuracy of the pedal position signal from the one sensor that is actively connected to the controller to the exclusion of the other because that one sensor's pedal is more distant from idle that the other pedal.

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

Abstract: An improved safety utility knife has a hollow handle and a blade which is normally retracted within the handle, but can be extended by squeezing an operating lever. The lever is connected to the blade holder by a toggle linkage having a rearmost pin secured in a discrete support whose position is adjustable. A thumbscrew threaded into the support enables one to adjust the position of the support from outside the handle, and thus change how far the blade protrudes from the handle when the operating lever is fully depressed.

Abstract: A bimetallic band saw blade has a high speed cutting edge welded to a backing band of a steel alloy containing the following elements percentages by weight:Cr - 0.5% to no more than 1.5%V - 0.10% to 0.75%Mo - 1.5% to 2.5%wherein said backing band comprises a substantially lesser amount by weight of Chromium than Molybdenum the alloy also contains C, Si, Mn, Nb and/or Ni and Al in such varying amounts that the total alloy content, except for Fe and inevitable impurities, is in the range of 3.12% to 8.48%.

Abstract: A scalpel including an elongated handle having an engaging surface located on the handle, a blade carried by the handle adjacent one end thereof and a guard movably mounted to the handle for sliding movement relative to the handle between a protective position covering the blade and a retracted position exposing the blade for use. The guard includes side members extending downwardly from an upper surface. The side members are positioned adjacent opposite sides of the handle and the resiliency of the guard forces the inner surfaces of the side members into engagement with the engaging surface of the handle. The guard is movably along the engaging surface in response to sliding movement of the guard relative to the handle. In a further form, the guard is slidable into a permanently locked position relative to the handle, thereby preventing reuse of the scalpel and inadvertent exposure of the blade.

Abstract: A surgical scalpel (100) is provided with a retractable guard (107) for its cutting blade (106). The guard (107) is mounted on the handle (101) of the scalpel (100) for sliding movement between an advanced position in which the blade (106) is covered and a retracted position in which the blade (106) is exposed. The guard (107) may be moved with one hand, and without requiring the surgeon, nurse and/or assistant to take his or her eyes away from the patient or the instrumentation during a surgical procedure. A two-position resiliently-biased manually-releasable detent means (113) is provided between the handle (101) and the guard (107). A closed longitudinal slot (122, 123) on the guard (107) cooperates with a pin (121) on the handle (101) to limit the sliding movement of the guard (107)--independently of the detent action therebetween--and accommodates the mechanical loading forces.

Abstract: A device for making, or enlarging, an opening in the tip of a rubber baby bottle nipple. One embodiment of the device has a lancet which can be selectively extended from a housing to cut an opening in the tip of a nipple. Alternatively, the lancet may be fixedly extended a predetermined distance from the housing and the nipple pushed onto the exposed end of the lancet by compression of a hinged, U-shaped handle. Other embodiments of the invention comprise a freestanding structure having the shape of a baby bottle nipple with a blade either mounted in a socket attached thereto on a flexible arm or string or in the structure itself.

Abstract: A utility knife has a handle providing a cavity and an opening at one end, and a slide seated in the cavity for sliding movement relative to the opening. Supported on the slide is a knife blade which moves therewith between a position within the cavity and a position projecting outwardly of the opening. The blade has a cutting edge extending along its lower edge, and the slide has a side wall against which the blade is disposed and a base wall upon which a portion of the cutting edge is disposed. The slide has a cam portion configured to produce a horizontal force component on the cutting edge portion of the blade when the cutting edge cuts into the base wall as a result of the cutting force applied by the user on the outwardly projecting blade.

Abstract: A surgical scalpel having a replacable, retractable cutting blade which may be locked in the operating or deployed position using a single digit on one hand is described. Safety of hospital personnel and medical waste disposal personnel is achieved without loss of function or convenience of the scalpel.

Abstract: A blade holder for a manual cutting tool having a rigid open-ended frame shaped to provide support for a blade between the ends of the frame so that the cutting edge of the blade is proud of the ends of the frame, a clamp pivotally mounted on the frame, and a spring mounted on the frame and acting on the clamp. The clamp is moveable between an open position and a closed position. Manual pressure on the clamp against the spring forces the clamp apart from the ends of the frame to leave a gap (the open position) for the insertion or removal of a blade. Release of the manual pressure results in the spring holding the clamp against the ends of the frame (the closed position) so as to provide for retention of the blade in position between the clamp and the frame during a cutting operation.

Abstract: A hamburger patty knife is provided which comprises a handle and a transition piece at one end of the handle forming an angle with the longitudinal axis of the handle. A flat plate extends away from the transition piece in a forward longitudinal direction. A blade attachment is provided having a beveled front edge. A structure is for securing the blade attachment to a distal edge of the plate in a removable manner. The beveled front edge of the blade attachment can be used to pick up and turn over a hamburger patty without disrupting the shape of the hamburger patty. Alternatively the blade can be installed in an upside down position which is extremely useful for cleaning dirty grills and pans.

Abstract: A retractable, disposable surgical knife that includes a hollow sheath and a blade assembly received for sliding movement within the hollow sheath. The blade assembly includes a slide block and a knife blade held by the slide block. A mechanism including a cooperating resilient actuator and guide track allows the blade assembly to be selectively secured in a first, retracted position wherein the blade is withdrawn into the sheath and a second, extended position wherein the blade extends from the sheath for use. A separate mechanism is provided for permanently locking the blade assembly in a third, fully retracted position wherein blade is fully withdrawn within the sheath to prevent inadvertent sticks. The permanent locking mechanism is fully concealed within the sheath so as to prevent inadvertent engagement with an object and possible release from the permanently locked position.

Abstract: A safety scalpel which comprises a disposable cartridge and a permanent handle. The disposable cartridge is releasably engaged to the handle. The scalpel is received solely within the cartridge and can be extended and retracted as desired. The biased retraction of the scalpel minimizes injury to operating personnel. The disposable cartridge enhances safety procedures.

Abstract: A utility knife comprising, in combination, a handle having a first handle portion and a second handle portion and coupling means to releasably join together the handle portions so as to be readily grasped by an operator during use, a central plane extending longitudinally through the handle and defining on opposite sides thereof a first blade-receiving chamber in the first handle portion for receiving a first blade holder and a second blade-receiving chamber in the second handle portion for receiving a second blade holder; and a first blade holder located in the first handle portion for supporting a first blade and a second blade holder located in the second handle portion for supporting a second blade, the blade holders being independently reciprocable in planes parallel with the central plane but on opposite sides thereof, each blade holder having an individual actuator extending to exterior of the handle whereby an operator may move either blade holder or both between a retracted inoperative orientation w

Abstract: A knife 10 comprises a blade holder 12, a blade 24 attached to the holder, and a protective member for the blade. Bias means 54 biasses the protective member into a first position in which protective edges 46, 48 thereof protrude beyond the blade cutting edge, so that the protective member covers the cutting edge. The protective member is movable against the biassing force exerted by the bias means, from the first position to a second position in which the cutting edge is exposed for use. First locking means locking the protective member in its first position, are also provided. The first locking means are adapted to release automatically the protective member on the protective edge of the protective member being placed against a surface to be cut and force being exerted on the blade in the direction of said surface.

Abstract: There is provided a disposable scalpel having a retractable blade. The blade may be secured in any of three positions: 1) an intermediated retracted position for shipping, 2) an exposed position for use and 3) a permanently locked retracted position. A cap is provided to cover the openings on the scalpel after the blade is secured in the permanently locked position.

Abstract: An improved safety utility knife has a hollow handle and a blade which is normally retracted within the handle, but can be extended by squeezing an operating lever. The lever is connected to the blade holder by a toggle linkage having a rearmost pin secured in a discrete support whose position is adjustable. A thumbscrew threaded into the support enables one to adjust the position of the support from outside the handle, and thus change how far the blade protrudes from the handle when the operating lever is fully depressed.

Abstract: A releasably locking handle for a retractable blade utility knife The handle is formed from a pair of elongated mating handle halves connected by a central pivot. A slidable blade carrier is supported between the handle halves. The handle has a dual locking mechanism which provides for pivotal opening of the handle only when the blade carrier is in a fully forward position. A magnet which is fixed in the handle slidably supports the blade carrier.