Safety utility blades, assemblies and methods of manufacturing
View Patent ↗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.
1. A safety utility knife assembly, comprising:
a handle having an aperture and a blade retainer receptacle;
a blade retainer having an upwardly extending blade release button and an upwardly extending blade catch, wherein the blade retainer includes a first half and a second half, and wherein the blade release button is received within the aperture and accessible therefrom when the blade retainer is inserted into the handle; and
a replaceable safety blade having a blade securing aperture, wherein a cutting edge of the replaceable safety blade extends perpendicular to a longitudinally extending axis of the handle, wherein the replaceable safety blade is removable from the safety utility knife assembly when a user presses on the blade release button to disengage the blade catch from the blade securing aperture for allowing removable of the safety replaceable blade from the blade retainer wherein the blade retainer further comprises a longitudinally extending resilient arm having one fixed end and an opposing distal end, the blade catch is disposed at the distal end, and the blade release button is disposed between the fixed end and the distal end, such that when the user presses on the blade release button, the resilient arm flexes at the fixed end, and the blade catch moves in the same direction as the blade release button to release the replaceable safety blade.
2. The safety utility knife assembly as in claim 1 , wherein the cutting edge is a first cutting edge, and the safety utility knife assembly further comprises a first blade throat configured to limit access to the first cutting edge of the replaceable safety blade when the replaceable safety blade is secured within the safety utility knife assembly.
3. The safety utility knife assembly as in claim 2 , further comprising a second blade throat configured to limit access to a second cutting edge of the replaceable safety blade when the replaceable safety blade is secured within the safety utility knife assembly.
4. The safety utility knife assembly as in claim 3 , wherein the first and second cutting edges define a single, continuous cutting edge.
5. The safety utility knife assembly as in claim 1 , wherein the replaceable safety blade includes a continuous piece of metal that is selected from the group consisting of: carbon steel, heat treated metal, heat treated carbon steel and stainless steel.
6. The safety utility knife assembly as in claim 1 , wherein the cutting edge has a triangular shaped cross section.
7. The safety utility knife assembly as in claim 1 , wherein the blade retainer includes a first wedge and a second wedge.
8. A safety utility knife assembly, comprising:
a handle having an aperture;
a blade retainer having an upwardly extending blade release button and an upwardly extending blade catch, wherein the blade release button is received within the aperture and accessible therefrom when the blade retainer is inserted into the handle; and
a replaceable safety blade having a blade securing aperture, wherein a cutting edge of the replaceable safety blade extends perpendicular to a longitudinally extending axis of the handle, wherein the replaceable safety blade is removable from the safety utility knife assembly when a user presses on the blade release button to disengage the blade catch from the blade securing aperture for allowing removable of the safety replaceable blade from the blade retainer.
9. The safety utility knife assembly as in claim 8 , wherein the cutting edge is a first cutting edge, and the safety utility knife assembly further comprises a first blade throat configured to limit access to the first cutting edge of the replaceable safety blade when the replaceable safety blade is secured within the safety utility knife assembly.
10. The safety utility knife assembly as in claim 9 , further comprising a second blade throat configured to limit access to a second cutting edge of the replaceable safety blade when the replaceable safety blade is secured within the safety utility knife assembly.
11. The safety utility knife assembly as in claim 10 , wherein the first and second cutting edges define a single, continuous cutting edge.
12. The safety utility knife assembly as in claim 8 , wherein the replaceable safety blade includes a continuous piece of metal that is selected from the group consisting of: carbon steel, heat treated metal, heat treated carbon steel and stainless steel.
13. The safety utility knife assembly as in claim 8 , wherein the cutting edge has a triangular shaped cross section.
14. A method of manufacturing a safety utility knife assembly as recited in claim 8 , the method comprising;
providing a handle having an aperture;
providing a blade retainer having a blade release button extending upwardly and a blade catch, wherein the blade release button is received within the aperture and accessible therefrom when the blade retainer is inserted into the handle;
providing a strip of blade material;
forming a rough blade shape from the strip of blade material;
forming a blade securing aperture in the rough blade shape;
forming a blade cutting edge in the rough blade shape to form a blade; and
inserting the blade in the blade retainer such that the blade catch is received within the blade securing aperture.
15. The method as in claim 14 , wherein the inserting step having the blade cutting edge oriented perpendicular to a longitudinally extending axis of the handle.
16. The method as in claim 14 , further comprising selecting the strip of blade material from the group consisting of: carbon steel, heat treated metal, heat treated carbon steel, stainless steel and ceramic.
17. The method as in claim 14 , further comprising forming the blade cutting edge to have a triangular shaped cross section.
18. The method as in claim 14 , further comprising having the blade securing aperture centered with respect to opposing ends of the replaceable safety blade.
19. The method as in claim 14 , further comprising having each end of the safety utility blade to include at least a portion extending perpendicular to the cutting edge.
20. The method as in claim 19 , further comprising having each end of the safety utility blade to include at least a portion extending at an angle with respect to the cutting edge.