The present invention is generally directed to shaving implements in general, and to shaving implements employing razor cartridges having at least one (1) primary blade and at least one (1) trim blade.
Most prior art shaving implements, also commonly known as wet shave razors, include a razor cartridge and a handle. The razor cartridge typically includes at least one primary blade that is positioned aft of a primary guard bar and forward of a primary cap. During use, the razor cartridge is mounted on a handle such that it can pivot relative to the handle between a resting position and a rotated position.
The prior art razors described above are quite useful for shaving a surface short hair, or stubble, from a surface. However, they are not as useful for maintaining and shaping features such as side bums, mustaches and goatees. This difficulty is due, in part, to the fact that the razor cartridge pivots relative to the cartridge. While the pivoting action is beneficial for keeping the primary blade(s) in contact with the skin during a longer shaving, it is not as beneficial during shorter strokes made when trimming/shaping.
U.S. Pat. No. 6,276,061 to Rozenkranc discloses a razor cartridge having both at least one primary blade and at least one trim blade. In the '061 patent, the inventor also discloses how a razor cartridge and handle combination that utilizes a unidirectional pivot can be advantageously used. When shaving with the primary blade(s), the cartridge is able to pivot relative to the handle. When shaving with the trim blade(s), the handle is rotated 180 degrees such that the razor cartridge is forced against a stop, preventing the razor from pivoting relative to the handle. Therefore, the razor is able to pivot when it is beneficial, but prevented from pivoting when it is not desired.
The '061 patent does not disclose a method of manufacturing a razor cartridge having both primary blade(s) and trim blade(s). Other prior art devices have suggested manufacturing a separate trim assembly and attaching it to a separate assembly containing the primary blade(s). However, such a process has inherent difficulties due, at least in part, to the fact that it requires several additional parts and manufacturing steps.
Based on the foregoing, it is the general object of the present invention to provide a shaving device that overcomes the problems and drawbacks associated with the prior art.
According to one aspect of the present invention, a razor cartridge includes an outer shell, and a support structure. The outer shell defines a primary blade opening and a trimming blade opening. The support assembly is located at least partially inside the outer shell and includes at least one primary blade slot and a trim blade slot. A primary blade is located within each of the primary blade slots in the support assembly such that a cutting edge on the primary blade extends through the primary blade opening in the outer shell. A trim blade is located within the trim blade slot in the support structure such that a cutting edge on the trim blade extends through the trim blade opening in the outer shell.
According to another aspect of the invention, a wire is wrapped around to the support assembly. In some embodiments, the wire extends over the cutting edge(s) of the primary blade(s) in order to protect the user's skin during shaving. In other embodiments, the wire extends over the primary blade(s) and the trim blade in order to protect the user's skin during shaving as well as during trimming/shaping.
According to a further aspect of the present invention, the razor cartridge includes handle connecting members which pivotally mount the razor cartridge on a handle. In these embodiments, the handle is able to pivot when shaving with the primary blades, but prevented from pivoting during trimming/shaping.
The advantages of the present invention will be apparent to one of skill in the art in light of at least the above Summary, the included Drawings, and the Detailed Description of the Invention.
Referring to
Referring now to
Blades 22, 26 are well known in the art. The present invention includes at least one trim blade 26, and at least one primary blade 22. As shown in
The support structure 14, as shown for example in
Typically, the primary slots 20 include a lower side 40 and an upper portion 42. When a primary blade 22 is placed within the primary slot 20, the lower side 40 of the primary slot 20 supports one side of the primary blade body 38, and the upper portion 42 of the primary slot 20 is in contact with opposite side of the primary blade body 38. The primary blade body 38 can be held in place in the primary slot 20 by a snap fit, press fit, or, in some instances, the primary blade body 38 can be glued or adhered to the primary slot 20. In fact, any manner known to one of skill in the art in which the primary blade 22 can be properly held in place within the primary blade slot 20 is acceptable.
In some embodiments, it is preferable that the lower side 40 of the forwardmost primary slot 21 extend to a position forward of the cutting edge 28 of the primary blade 22 positioned therein. In doing so, the lower side 40 of the forwardmost primary blade slot 21 sets the angle at which the skin approaches the primary blade 22.
The trim blade slot 24 also includes a lower side 44 and an upper portion 46. When the trim blade 26 is placed within the trim slot 24, the lower side 44 of the trim blade slot 24 supports one side of the trim blade body 38, and the upper portion of the trim blade slot 24 is in contact with opposite side of the trim blade body 38. The trim blade body 38 can be held in place in the trim slot 24 by a snap fit, press fit, or, in some instances, the trim blade body can be glued or adhered to the trim slot 24. In fact, any manner known to one of skill in the art in which the trim blade 24 can be properly held in place within the trim slot is acceptable.
Referring to
Referring now to
The blades 22, 26 and support structure 14 are at least partially enclosed within an outer shell 12. The outer shell 12 includes two pieces, a top portion 50 and a bottom portion 52. The top portion 50 can include a primary blade opening 16, a primary guard 54 and a primary cap 56. When the support structure 14 and blades 22, 26 are placed in the top portion 50 of the outer shell 12, the primary blades 22 are positioned in the primary blade opening 16 where they are operable to shave a hirsute surface. The primary guard 54 can be made from a plastic, metal, or elastomeric material and can, in some instances, include bumps, fins, or other protrusions. The primary guard 54 generally stretches the skin prior to encountering the primary blades 22. The primary cap 56 is typically made from, or applied with a low friction material. In some instances, the primary cap 56 can lubricate the skin once it has passed over the primary blade(s) 22.
The top portion 50 also defines a trim blade opening and includes a blade cap 58. In some embodiments, the top portion 50 also includes a blade guard 60. Alternatively, the blade guard 60 can be at least partially formed by the bottom portion 52 of the outer shell 12, as well. When the support structure 14 and blades 22, 26 are placed in the top portion of the outer shell 12, the trim blade 26 is positioned in the trim blade opening 18 where it is operable to trim a hirsute surface. The trim blade guard is located in front of the trim blade 26 and can be made from a plastic, metal, or elastomeric material. The trim blade guard 60 can, in some instances, include bumps, fins, or other protrusions (See e.g.
The bottom portion 52 at least partially encloses the support structure 14 within the outer shell. The bottom portion 52 is secured to the top portion 50 via a snap fit, press fit, or, in some cases, the two can be glued or adhered together. In many instances, the bottom portion 52 includes connecting structures 60 for pivotally connecting the razor cartridge 10 to the handle 32. As shown in
Referring now to
Modification and variations may be made to the disclosed embodiments without departing from the subject and spirit of the invention as defined by the following claims.
This application claims the benefits of U.S. Provisional Patent Application Ser. No. 60/923,433, filed on Apr. 13, 2007, the contents of which are incorporated by reference herein in their entirety.
Number | Date | Country | |
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60923433 | Apr 2007 | US |