A chemically etched needle is provided herein. The chemically etched needle includes a metal base having a first side and a second side. The chemically etched needle also includes a chemically etched blade at one end of the metal base and formed at an intersection of a distal diverging surface and a proximal diverging surface, at least one of the diverging surfaces slopes inward towards the second side.

A chemically etched needle is provided herein. The chemically etched needle includes a metal base having a first side and a second side. The chemically etched needle also includes a chemically etched blade at one end of the metal base and formed at an intersection of a distal diverging surface and a proximal diverging surface, at least one of the diverging surfaces slopes inward towards the second side.

The present disclosure relates to safety blades for use in utility knives, related assemblies and methods of manufacturing. More specifically, the present disclosure relates to safety blades for use in utility knives, related assemblies and methods of manufacture which limit user exposure to associated cutting edges.

The present disclosure relates to safety blades for use in utility knives, related assemblies and methods of manufacturing. More specifically, the present disclosure relates to safety blades for use in utility knives, related assemblies and methods of manufacture which limit user exposure to associated cutting edges.

A utility instrument is in the form of a cutting tool suitable for fitting onto a user's finger. The tool has a blade and a sheath, both coupled to a mounting structure. The blade and sheath are pivotable with respect to each other. A user can wear the tool on a finger about a finger joint. The user can bend the finger to set the tool to an open condition to expose the blade for use, and can stretching the finger to set the tool to a closed condition to safely shade the blade using the sheath. The tool may further have a housing for fully receiving the blade. The blade may extend out of the housing for use, and may be retracted into the housing for safety.

An interchangeable different style-blade utility knife includes an elongate handle having proximal and distal ends along a handle axis. A blade holder is provided for supporting a blade and actuating means is provided for selectively attaching and detaching the blade holder to the distal end of the handle at a parting line. A blade is supported by the blade holder and has an exposed cutting edge generally along a lower side of the handle and has a projected predetermined length along the axis. The blade holder has a support upper portion generally along an upper side of the handle and has a projected length along the axis substantially equal to or generally proportional to the predetermined length to provide support for the blade. A kit includes a plurality of blade holders each with a different style blade, each blade holder having a support upper portion proportional to an associated blade.

An interchangeable different style-blade utility knife includes an elongate handle having proximal and distal ends along a handle axis. A blade holder is provided for supporting a blade and actuating means is provided for selectively attaching and detaching the blade holder to the distal end of the handle at a parting line. A blade is supported by the blade holder and has an exposed cutting edge generally along a lower side of the handle and has a projected predetermined length along the axis. The blade holder has a support upper portion generally along an upper side of the handle and has a projected length along the axis substantially equal to or generally proportional to the predetermined length to provide support for the blade. A kit includes a plurality of blade holders each with a different style blade, each blade holder having a support upper portion proportional to an associated blade.

The knife includes a handle portion attached to a blade with a tip at its distal end. The blade comprises four surfaces that converge to form a spine and opposing cutting edges with each surface having a concave segment, a first angled segment, a flat segment, and a second angled segment as the surface extends from the spine to the edge. Similarly, the tip includes four surfaces that converge and terminate at a point, with each surface comprising only an angled segment. Optionally, the knife includes a unique safety lanyard that has two attachment points on the handle such that a closed loop is adjustably formed around the user's hand when gripping the handle, which aids in withdrawing the knife, stabilizing the user's grip, and preventing the hand from sliding forward while in use. Optionally, the knife includes a thumb plate as an additional safeguard.

The knife includes a handle portion attached to a blade with a tip at its distal end. The blade comprises four surfaces that converge to form a spine and opposing cutting edges with each surface having a concave segment, a first angled segment, a flat segment, and a second angled segment as the surface extends from the spine to the edge. Similarly, the tip includes four surfaces that converge and terminate at a point, with each surface comprising only an angled segment. Optionally, the knife includes a unique safety lanyard that has two attachment points on the handle such that a closed loop is adjustably formed around the user's hand when gripping the handle, which aids in withdrawing the knife, stabilizing the user's grip, and preventing the hand from sliding forward while in use. Optionally, the knife includes a thumb plate as an additional safeguard.

A utility knife includes a knife body that has a knife frame and an ergonomic outer casing attached to the knife frame. The utility knife also includes a retractable blade holder that holds a blade. The retractable blade holder extends out of and retracts into the knife body and may also be selectively oriented at a first angle and a second angle relative to a longitudinal axis of the knife body.