Abstract: Embodiments are described for a simple convertible utility knife and scraper includes a handle, slide mechanism, and flat spring with a centrally mounted utility blade. The flat spring locks into precut positions in the handle to secure the blade in the desired position, whether in a cutting position or a scraping position. The blade can be partially extended to expose the front of the blade in the cutting position. When the slide is fully extended, the blade can rotate about a central axis to a position perpendicular to the handle and then be retracted into slots at the end of the handle to secure and support the blade in the scraper position.

Abstract: A single-action convertible utility knife and scraper includes a carriage and a slide mechanism slidably mounted within a housing. A blade support is pivotally mounted on the carriage for movements of a blade between cutting and scraper orientations. The carriage and the slide mechanism can be moved by an external button between a retracted position wherein the blade support is fully retracted within the housing, an extended position wherein the blade support is in an operative cutting or scraping position and a conversion position wherein the blade support is moved forwardly of the extended position to enable the blade support to transition from one orientation to another while clearing the housing. A bi-stable mechanism alternatingly pivots the blade support between the first and second orientations when the external button is successively advanced to move the slide mechanism forwardly beyond the extended position to incrementally advanced positions.

Abstract: A flip cutter and drill instrument and method of antegrade drilling and retrograde cutting using such an instrument. The flip cutter and drill instrument is provided with a drill which has a multi-blade configuration and which engages an inner tube or inner member of the instrument to articulate between at least a first “straight” position (for example, about parallel to the longitudinal axis of the instrument) when the instrument is in the drilling mode, and at least a second “flip” position (for example, a non-parallel position relative to the longitudinal axis of the instrument) when the instrument is in the cutting mode.

Abstract: The present invention discloses a utility knife, which includes a housing that has an internal chamber; a blade carrier for carrying a single blade; a locking piece for locking the single blade in the blade carrier; and a spare blade cartridge for storing more than one spare blade. The blade carrier, the locking piece and the spare blade cartridge are arranged in the internal chamber. The blade carrier is arranged to be movable between a first position and a second position, and when the blade carrier is at the first position, the blade carried by the blade carrier extends out of the housing, when the blade carrier is at the second position, the blade carried by the blade carrier retracts into the housing.

Abstract: The invention relates to a knife, comprising a blade carrier (14) for holding a blade (15), having at least one primary knife part (11) and a secondary knife part (12), which is configured to be movable relative to the primary knife part (11), wherein the primary knife part (11) is associated with first coupling means (20, 36), which can be detachably engaged with second coupling means (18, 38) associated with the secondary knife part (12) in order to move the blade carrier (14) by way of a motion of the primary knife part (11) relative to the second knife part (12) between a safety position, in which the blade (15) is retracted into a knife housing (11) configured by the primary knife part (11) and/or the secondary knife part (12) and inaccessible to the user, and an intermediate position, in which the blade (15) protrudes from the knife housing (11), wherein the blade carrier (14) is subjected to a load by a restoring force (21) in the safety position.

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 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: A holster for a cutter apparatus includes a body sized to receive a cutter apparatus therein and configured to provide a cutter-holster interface that causes a component of the cutter apparatus to reposition in relation to a housing of the cutter apparatus as the cutter apparatus is pushed into the holster. The component (e.g., a blade depth selector) is automatically repositioned to a safe (or other predetermined) position in response to the cutter apparatus being pushed into the holster.

Abstract: A preferred embodiment of a safety carton cutter comprises a first frame member pivotably connected to a second frame member to form a housing. Inside the housing mounted on the first frame member is a blade receptacle having a latch, a blade carrier, a biasing member and a follower. The follower is adapted to communicate with a cam profile located on a cam in the first frame member. The configuration of the follower and cam profile provides an extending and retracting mechanism that keeps the blade in a constant exposed position before and during the cutting process, and then allows the blade to retract immediately after the cutting process is complete.

Abstract: A knife has a housing, a blade carrier supported in the housing and adapted to hold a blade, and an actuating element coupled to the blade carrier. A handle can move between a nonactuated position and an actuated position and is coupled to the actuating element such that on movement from the nonactuated position to the actuated position the actuating element displaces the blade carrier from a safety position in which blade mounted on the blade carrier is retracted into a seat of the housing in a first cutting position in which the blade projects out of the housing. A pivot joint connects the actuating element with the blade carrier. A guide supports the blade carrier in a translatory and a rotatable manner on the housing.

Abstract: The present invention provides for a folding utility knife comprising: a handle pivotally connected to a blade holding compartment, the handle comprises at least two side walls forming a space, the space of the handle designed to encase at least a portion of a blade holding compartment during a folded position, the blade holding compartment comprising an internal cavity leading to an opening at a front end of the blade holding compartment which allows a portion of a blade to protrude from the blade holding compartment, a rear end of the blade holding compartment is pivotally attached to one end of the handle; and a device that allows the blade to be in a first extended position during use and then be retracted to a second non-use position, the entire blade is situated within the internal cavity of the blade holding compartment during the second position.

Abstract: A folding pocket utility knife includes a front handle, and a rear handle pivotally mounted to the front handle via a pivot. The rear handle contains a cavity configured to contain at least a portion of the front handle within the cavity. A blade holder is mounted inside the front handle for holding a blade, and a bendable blade strap is attached to the blade holder and to the rear handle. The blade strap extends around an outer circumference of the pivot to move the blade holder from a closed position where the front handle is in the cavity and the blade is completely within the front handle, to an open position where the front handle is not in the cavity and the blade extends from a terminal end of the front handle.

Abstract: An improvement for a dual handle fighting knife having interlocking handles when in open position and multiple spring blades stabilization in open and closed position. The handle blade spring engagement provides for a safe, straight-forward interlocking blade position and spacing of said cutting edge engagement with said handle when in closed position.

Abstract: A foldable knife includes a handle, a frame, a cartridge and a blade-driving device. A leaf spring is attached to the frame. The frame is connected to the handle so that it can be pivoted into and from the handle. The cartridge is connected to the frame so that it can be pivoted from the frame for receiving at least one blade and into the frame for feeding the blade. The leaf spring reaches the blade through a slot in the cartridge. The blade-driving device includes a plate, a switch and a connector. The plate is in firm contact with the blade. A primary portion of the switch is located outside the frame and a secondary portion of the switch is inserted into the frame through a slot. The connector connects the plate to the secondary portion of the switch so that the blade is movable via operating the switch.

Abstract: A folding pocket utility knife includes a front handle, and a rear handle pivotally mounted to the front handle via a pivot. The rear handle contains a cavity configured to contain at least a portion of the front handle within the cavity. A blade holder is mounted inside the front handle for holding a blade, and a bendable blade strap is attached to the blade holder and to the rear handle. The blade strap extends around an outer circumference of the pivot to move the blade holder from a closed position where the front handle is in the cavity and the blade is completely within the front handle, to an open position where the front handle is not in the cavity and the blade extends from a terminal end of the front handle.

Abstract: A folding knife includes a handle portion and a blade pivotally coupled to the handle portion for pivoting movement between an open position and a closed position. The knife can include a locking mechanism that retains the blade against pivoting movement when it is in the open position. In particular embodiments, the blade is coupled to the handle portion such that the application of pressure to the blade in a predetermined direction causes displacement of blade relative to the handle portion in the plane within which the blade pivots. The displacement of the blade relative to the handle portion is effective to release the blade from the locking mechanism and allow the blade to be pivoted to the closed position.

Abstract: A utility knife has a counter-reciprocating blade and guard. Preferred mechanism has several components, including a housing, a first pivot that pivotally couples the housing and the blade, and a second pivot that pivotally couples the housing and the guard. Preferably, of the blade and guard reciprocates such that forced retraction of the guard results in forced extension of the blade. During locked position, the guard is in a locked position and a trigger cooperates with the locking mechanism to unlock the guard. The guard can only be unlocked after releasing the trigger to a default position.

Abstract: To automatically retract the blade after cutting, a flat serpentine spring is integrally formed with a thumb piece which is slidably received in a slot formed along the upper edge of a housing/handle. The housing has a finger rest projection on the lower edge to facilitate cutting while the blade is projected with the thumb. The two halves of the housing snap together using a block-like projection formed on one half, and a pair of tabs formed on the other. The tabs, which are resilient, slide along the sides of the projection until recesses on each of the side of the projection are reached. Inwardly extending ridges on the ends of the tabs enter the recesses to provide a click lock. An aperture between the tabs allows pressure to be applied to the top of the projection to separate the two halves for blade reset/re-adjustment. The blade carrier, which is adapted to support two different types of blades, is slidably mounted in the housing so that it and the thumb piece are free of detents or click-locks.

Abstract: To automatically retract the blade after cutting, a flat serpentine spring is integrally formed with a thumb piece which is slidably received in a slot formed along the upper edge of a housing/handle. The housing has a finger rest projection on the lower edge to facilitate cutting while the blade is projected with the thumb. The two halves of the housing snap together using a block-like projection formed on one half, and a pair of tabs formed on the other. The tabs, which are resilient, slide along the sides of the projection until recesses on each of the side of the projection are reached. Inwardly extending ridges on the ends of the tabs enter the recesses to provide a click lock. An aperture between the tabs allows pressure to be applied to the top of the projection to separate the two halves for blade reset/re-adjustment. The blade carrier, which is adapted to support two different types of blades, is slidably mounted in the housing so that it and the thumb piece are free of detents or click-locks.

Abstract: A folding knife having a blade and a longitudinally extending liner. Pivotally connected to the liner is a blade holder receiver, or shell, which receives the liner when the blade is in a retracted position, to cover and retain the blade within the liner. The liner is also received by the shell when the blade is in the extended position, and through cooperation of the shell with the blade and the liner, the blade can be locked in its extended position. The knife may be opened and closed using one hand, and a sharpening device is provided for attachment to the liner and shell for sharpening the blade.

Abstract: In a folding knife or hand tool having a handle and a blade pivotally connected to the handle, a spring loaded crossbolt 1 is fitted to the blade tang. One end of crossbolt 1 protrudes through an arcuate slot in the handle, crossbolt slot 32. A locking collar 19 on crossbolt 1 engages locking counterbores A 34 and B 36 located on the blade side of the opposite ends of crossbolt slot 32. When finger pressure is applied to the end of crossbolt 1, locking collar 19 is forced to disengage locking counterbore A 34 and retreat to a relieved area on the blade, collar relief 52. This permits the blade to be extended by forward finger pressure on crossbolt 1. When the blade is fully extended, spring pressure forces locking collar 19 into the opposite locking counterbore B 36, thus locking the blade. Reversing the sequence will close and lock the blade.

Abstract: A pair of scissors having a pair of blades which are slidingly fitted between a pair of handles which are pivotally supported one on the other. The blades are drawn out when the scissors are used, and they are accommodated between the handles when the scissors are not used, thus enabling the scissors to be easily carried.

Abstract: A locking knife apparatus that includes a handle unit, a blade member support unit, a blade member, and a blade pivot hole and lock unit. The blade member includes a pivot slot disposed therethrough for operable interaction with the blade pivot hole and lock unit. Both the blade member and the blade member support unit include tabs and notches that may interact with one another to assist in locking the blade member in an open position.

Abstract: Cutlery apparatus with readily interchangeable cutting tools such as knives, the cutting tools being either double ended or a plurality of single ended tools pivotally mounted in a handle, either directly between the handle sides or on a generally U-shaped tool holding member which is in turn pivotally movable in and out of a slotted handle, the apparatus being further provided with lock arm means also pivotally mounted on the handle, forming a part of the handle when closed and retaining the tool rigidly in the handle without use of spring means when the tool is locked in the handle in a position of use. The apparatus which in certain embodiments is of a type commonly called swap blade knives, is readily disassembleable for tool interchange or cleaning. Double ended knives embodying the invention have the strength of a full tang knife with the versatility of a multi-bladed folding knife.

Abstract: The present invention relates to a hand-held type opening and closing action tool in the form having front active pieces for cutting and other operations adapted to perform opening and closing motion around the axis of a pivot, as found in manual sharp-edged tools and manual tools, such as scissors, pliers, nippers, and strippers. The tool comprises a hand-holdable cover case formed with an elongated guide hole, opening and closing operation levers pivotally mounted on the case and normally resiliently urged in the direction to spread out from the case, and front active pieces operatively connected to the levers to bear the resilient force on the levers and adapted to be opened and closed by the levers, the arrangement being such that the levers are prostrated into the sunken state in the case against the resilient force and in this state the pivot of the pieces is slid along the elongated guide hole of the case, whereby the pieces are also received in the case in the sunken state.

Abstract: A foldable push dagger includes an elongated, movable, sharpened dagger blade secured to an elongated dagger handle. In a fully closed position, the longitudinal axis of the blade is parallel to the longitudinal axis of the handle such that the blade is disposed entirely within the handle. In a fully opened position, the longitudinal axis of the blade is perpendicular to the longitudinal axis of the handle such that the sharpened portion of the blade is disposed exteriorly of the handle and the push dagger assumes a "T" configuration. In its fully opened position, the blade is releasably secured in the handle against substantial relative movement therewith.

Abstract: A folding knife having a handle with a slot formed therein has an arm member, one end of which is pivotally attached to the handle and pivotable between a first position disposed within the slot to a second position substantially outside of the slot. A knife blade has one end thereof pivotally attached to the other end of the arm member and is moveable when the arm member is in the second position thereof between a first position adjacent to the arm member and a second position wherein the knife blade extends away from the arm member for allowing the knife blade to be selectively folded into the handle for storage or out from the handle for use.

Abstract: A utility tool, such as a scraper, trimmer, cutter and the like, has a tool element and an elongated handle element, the tool element being mounted on the handle element for movement between an extended position in which a working edge portion of the tool element assumes a working position outside the handle element, and a retracted position in which the tool element is accommodated in an internal cavity of the handle portion. The handle element has a cam track, such as a guide slot, and the tool element has a follower pin which guides the tool element during its movement between the two positions thereof. The guide slot has two sections which enclose an angle with one another, one of the sections extending along the front end of the handle element, and the other section extending along a longitudinal marginal portion of the handle element. The front end of the handle element and the associated cam track section enclose an acute angle with the elongation of the handle element.

Abstract: An improvement for a dual handle fighting knife having interlocking handles when in open position and multiple spring blades stabilization in open and closed position. The handle blade spring engagement provides for a safe, straight-forward interlocking blade position and spacing of said cutting edge engagement with said handle when in closed position.