A utility knife includes a body having a handle portion and a head portion, the handle portion having a plurality of recesses formed in the handle portion. Each of the recesses is capable of receiving at least one replacement blade. A grip is pivotally attached to the handle portion and configured to be positioned in an open position or a closed position, the grip in the open position providing access to the at least one replacement blade. A blade carrier is pivotally coupled to the body, the blade carrier having a post and being rotatable between a closed position and an open position. An active blade is received by the post of the blade carrier such that the post extends into an opening of the active blade.

Safety knife with a blade that can be replaced and where access to the cutting edge of the blade is limited so as to reduce the risk of injury to a user, comprising a blade piece with a blade arranged between a guard and a fixation and an oblong knife body comprising a holder and a partly flat insert for rigidly holding the blade piece near a proximal end, wherein said insert having rails on both sides of the flat part at least near the proximal end, said holder including a depression near the proximal end for receiving the fixation and a channel extending from the proximal end towards the distal end at least beyond the depression for receiving at least the flat part of the insert, said channel having grooves on each side starting at the proximal end for receiving the rails.

The present invention generally relates to a safety cutter. Specifically, embodiments of the present invention relate to a compact safety cutter apparatus with a retractable blade guard. Embodiments of the safety cutter apparatus are further comprised of an automatic blade guard release mechanism.

A roof cutter and a method of cutting a roof is provided. The roof cutter includes a basethat is movable between a retracted configuration and a cutting configuration. In the retracted configuration, the blade is displaced from the roof. In the cutting configuration, the blade is positioned so as to facilitate cutting of the roof. The roof cutter includes a stop assembly and an engagement member that is configured to engage with the stop assembly when the base is in the cutting configuration, thereby establishing a maximum cutting depth. A dampening mechanism softens impacts associated with the blade moving to the cutting depth and absorbs vibrations associated with cutting the roof at the cutting depth. An adjustment assembly is configured to selectively adjust the cutting depth and/or to selectively restrain the base in the retracted configuration, thereby preventing the blade from cutting the roof.

A cutting tool for cutting a corner of a cardboard box is provided. The cutting tool includes a guide member having a handle and a guide extending forwardly from the handle. The guide has a pair of guiding wings adapted to engage the cardboard box to position the cutting tool relative to the corner. The cutting tool also includes a cutting element operatively connected to the guide and extending between the guiding wings. The cutting element is adapted to cut the corner of the box via a downward movement of the guide member along the corner of the box. The cutting tool also includes a cut-stopping system connected to the guide member, the cut-stopping system being adapted to contact a working surface, therefore blocking the downward movement of the guide member and limiting the length of the cut.

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.

An automatically retractable knife that includes an actuator, a blade carrier, two springs, a pawl and a blade. The knife is configured with a safety feature to ensure that the knife blade is automatically retractable upon completion of cutting a surface.

A safety knife functions as both a box cutter and a separate line cutter. A slidable grip is manually displaceable between two stable safety positions. In one safety position, the grip obstructs access to a forwardly projecting blade. In a second safety position, the grip obstructs access to the line cutter.

As shown in the figures, the device of the present invention is a hand held and hand operated cutting blade connectively attached to the bottom end of a pole that is housed in and partially contained within a capped cylindrical tube wherein there are tracks installed to guide the cutting blade up and down within the tube, and there are two openings (slots or channels) on the sidewall of the cylindrical tube which are used to be fitted over the sides of a box at the corner. As the tube is lowered to the bottom of the box, the blade will slide up into the tube and come to a rest positioned at the top of the corner of the box. The pole with blade can then be easily pushed down through the corner of the box cutting it from top to bottom.

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.