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 a blade retainer release button aperture;
a blade retainer having an upwardly extending blade retainer release button extending outwardly and an upwardly extending blade retainer catch, wherein the blade retainer release button is received within the blade retainer release button aperture and accessible therefrom when the blade retainer is inserted into the handle; and
a replaceable safety blade carried by the blade retainer and having a blade retainer securing aperture, wherein the replaceable safety blade is removable from the safety utility knife assembly when a user presses on the blade retainer release button to disengage the blade retainer catch from the blade retainer securing aperture for allowing removal of the 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, wherein the blade retainer catch is disposed at the distal end, wherein the blade retainer release button is disposed on the longitudinally extending resilient arm between the one fixed end and the opposing distal end, wherein the resilient arm flexes at the fixed end, and wherein the blade retainer catch moves in the same direction as the blade retainer release button to release the blade retainer catch from the blade retainer securing aperture and allow the replaceable safety blade to be removed from the handle.
2. The safety utility knife assembly as in claim 1 , further comprising a first blade throat configured to limit access to a 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 contiguous 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 a cutting edge of the replaceable safety blade 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 a blade retainer release button aperture;
a blade retainer having an upwardly extending blade retainer release button extending outwardly and an upwardly extending blade retainer catch, wherein the blade retainer release button is received within the blade retainer release button aperture and accessible therefrom when the blade retainer is inserted into the handle; and
a replaceable safety blade carried by the blade retainer and having a blade retainer securing aperture, wherein the replaceable safety blade is removable from the safety utility knife assembly when a user presses on the blade retainer release button to disengage the blade retainer catch from the blade retainer securing aperture for allowing removal of the 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, wherein the blade retainer catch is disposed at the distal end, wherein the blade retainer release button is disposed on the longitudinally extending resilient arm between the one fixed end and the opposing distal end, wherein the resilient arm flexes at the fixed end, and wherein the blade retainer catch moves in the same direction as the blade retainer release button to release the blade retainer and catch from the blade retainer securing aperture and allow the replaceable safety blade to be removed from the handle.
9. The safety utility knife assembly as in claim 8 , further comprising a first blade throat configured to limit access to a 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 contiguous 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 a cutting edge of the replaceable safety blade has a triangular shaped cross section.
14. A method of manufacturing a safety utility knife assembly as in claim 8 , the method comprising;
providing the handle having the blade retainer release button aperture and the blade retainer securing aperture;
providing the blade retainer having the blade retainer release button extending upwardly and the blade retainer catch, wherein the blade retainer release button is received within the blade retainer release button aperture and is 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 the replaceable safety blade;
inserting the blade in the blade retainer; and
inserting the blade retainer into the handle such that the blade retainer catch is received within the blade retainer securing aperture.
15. The method as in claim 14 , wherein the blade 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 retainer 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 14 , 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.