A utility knife includes a hollow handle having a slot and an opening at each end. A razor is slidable between each end of the handle and may protrude at each opposing end for cutting use. The razor is mounted to a shuttle which includes a tab that is positioned within the slot. The user may use the tab to slide the shuttle and the blade within the handle between the two ends, as desired. A U-shaped blocking component is pivotally attached to the handle and is used to block sliding movement of the tab beyond a midpoint of the handle to prevent the razor protruding into the user's hand. The user must unlock the blocking element to safely allow the shuttle to be slid past.

A device is disclosed including a reloadable utility knife having a blade magazine with one or more compartments for storing multiple cutting blades. The blade magazine has a reloading compartment for new blades, and a storage compartment to keep additional blades. The blade magazine is loaded from the rear of the knife body and is locked inside. A working blade may be released before reloaded a fresh blade. The working blade can be extended or retracted multiple times via a blade transport mechanism. The blade magazine may be extracted via the lock mechanism and pushed out by a spring designed for this purpose. The blade transport mechanism, the blade release mechanism, and a blade lock mechanism work in cooperation to allow extension and retraction of a blade, disposing of a blade, and reloading of a blade.

A retractable utility knife includes a blade carrier having a control pin and a frame liner having a control track, the carrier moveable between a retracted configuration, and deployed configuration, and a removal/replacement configuration, the control pin retaining the blade to the carrier in the retracted configuration and deployed configuration, and the control track being arranged so that the control pin releases the blade from the carrier when in the removal/replacement configuration.

A utility knife is provided, including: a housing, including first and second compartments; a blade holder, movably received within the first compartment; a blade storing carrier, detachably inserted in the second compartment, including a receiving portion for receiving at least one spare blade; an elastic unit, disposed between the housing and the blade storing carrier; and a locking mechanism, including a base body disposed to the housing, a movable member attached to the base body and movable between locking and release positions, a first engaging member disposed on the movable member and a second engaging member disposed on the receiving portion and releasably engagable with the first engaging member, when the is second engaging member is disengaged from the second engaging member, the elastic unit biases the receiving portion to eject the blade storing carrier.

A box top opener employs a trapezoidal ceramic blade having a cutting edge which is positionable at multiple positions. A knob is rotatable to extend and retract the blade. A guide projects from a front of the cutter body to provide a guide surface engageable against the top of a box. In one embodiment, a blade carrier has a follower which traverses a spiral track for displacing the blade.

A finger-push safety knife, including a knife housing, a knife holder, a blade, and a shifter. The blade is installed onto the knife holder. The knife holder is disposed in a cavity of the knife housing. A restricting groove is disposed on the knife holder. A gear adjustment slot is disposed on the knife housing. When the shifter rotates to the blade ejection gear, the shifter fits with the restricting groove to enable the knife holder to move and move to a preset position in the cavity, and the shifter is clamped at a blade ejection position in the restricting groove, so that the displacement of the knife holder can be restricted and the knife holder can be fastened at the preset position in the cavity under the action of an external force, to restrict an extension length of the blade from the knife housing.

A drywall multi-tool assembly includes a block that has a plurality of intersecting sides such that the block has a triangular shape. A saw is pivotally coupled to the block for cutting drywall from a plurality of orientations. A knife is slidably coupled to the block for cutting the drywall. A ruler is pivotally coupled to the block for making measurements and a square is pivotally coupled to the block for measuring a right angle. A first bubble level is coupled to the block to determine level along a first axis. A second bubble level is coupled to the block to determine level along a second axis. A rasp is coupled to the block wherein the rasp is configured to abrade the drywall.

A utility knife is disclosed that is easy to use and provides safety measures to the user. The knife has a handle having a proximal end and a distal end and a manually movable blade contained within said handle. The movable blade pivots at a point between the proximal and distal ends of the knife handle and exposes the blade for use from the distal end away from the horizontal plane of the handle. After using the utility knife, the blade automatically retracts back into the handle preventing accidental injuries from the blade. The utility knife also can be fitted with a safety lanyard and a locking pin to secure the blade in the closed position when not using the knife or in the open position when changing the blade.

A utility knife comprises a housing (1), a blade carrier (2), a blade (3), a position control component (4) and a safety control component (5); a positioning direction (B) is defined at an angle to the sliding direction (A) of the position control component (4), the first blocking position (141) is farther away from the positioning portion (42) of the position control component (4) than the rest areas of the slide rail (13) except the first blocking position (14). In this way, in addition to blocking position shift, the position control component can also be used for contact-fitting with the blade carrier to determine whether the blade carrier can slide forward independently. Therefore, the utility knife has fewer components, resulting in low material cost, fewer assembly steps, convenient and time-saving assembly process, and the components are not easy to lose.

a finger-push safety knife, including a knife housing, a knife holder, a blade, and a shifter. The blade is installed onto the knife holder. The knife holder is disposed in a cavity of the knife housing. A restricting groove is disposed on the knife holder. A gear adjustment slot is disposed on the knife housing. When the shifter rotates to the blade ejection gear, the shifter fits with the restricting groove to enable the knife holder to move and move to a preset position in the cavity, and the shifter is clamped at a blade ejection position in the restricting groove, so that the displacement of the knife holder can be restricted and the knife holder can be fastened at the preset position in the cavity under the action of an external force, to restrict an extension length of the blade from the knife housing.