Safety razor with comb and blade
11104018 · 2021-08-31
Assignee
Inventors
Cpc classification
B26B21/12
PERFORMING OPERATIONS; TRANSPORTING
B26B21/125
PERFORMING OPERATIONS; TRANSPORTING
B26B21/523
PERFORMING OPERATIONS; TRANSPORTING
B26B21/4081
PERFORMING OPERATIONS; TRANSPORTING
International classification
B26B21/12
PERFORMING OPERATIONS; TRANSPORTING
B26B21/52
PERFORMING OPERATIONS; TRANSPORTING
Abstract
A safety razor removes hair from skin using the cutting blade comprising a sharp edge along an elongated side of a planar surface. An outer comb has a row of outer teeth running along the planar surface on an outside of the cutting blade, each outer tooth is substantially perpendicular to the sharp edge and spaced with a gap between the row of the outer teeth and the planar surface of the cutting blade. Ends of the row of outer teeth comprise outer teeth tips. An inner guard runs along the planar surface on an inside of the cutting blade. The sharp edge of cutting blade is recessed up to a skin surface contour, the skin surface contour defined by the outer teeth tips and an edge of the inner guard. The sharp edge of cutting blade longitudinally bends to cause further recess relative to the skin surface contour.
Claims
1. A safety razor for hair removal from skin, comprising: a cutting blade having a planar surface and comprising a sharp edge; an outer comb comprising a row of outer teeth running along the planar surface on an outside of the cutting blade, wherein the outer comb comprises a leading opening spaced between the row of the outer teeth and the planar surface of the cutting blade; an inner guard comprising an inner guard edge running along the planar surface on an inside of the cutting blade, wherein a trailing opening is formed between the sharp edge of the cutting blade spaced from the inner guard edge of the inner guard; and a shaver handle coupled to the cutting blade, the outer comb, and the inner guard and having a longitudinal axis always substantially perpendicular to the sharp edge of the cutting blade, wherein the outer comb is between the shaver handle and the cutting blade; and wherein the cutting blade is held in a position between the outer comb and the inner guard.
2. A safety razor according to claim 1, wherein the leading opening is less than or equal to the trailing opening.
3. A safety razor according to claim 2, wherein the leading opening is less than or equal to the trailing opening when the cutting blade is recessed near a surface of the skin when pressing into the skin during shaving.
4. A safety razor according to claim 2, wherein the leading opening is less than or equal to the trailing opening when the cutting blade is recessed near a surface of the skin at rest.
5. A safety razor according to claim 1, wherein an exposure distance between an edge of the outer teeth and the inner guard edge of the inner guard is about 0.1727 centimeters (about 0.068 inches).
6. A safety razor according to claim 1, wherein the leading opening is about 0.08128 centimeters (about 0.032 inches).
7. A safety razor according to claim 1, wherein an inner distance BB measured along a longitudinal axis H of the cutting blade to a vertical plane of the inner guard edge of the inner guard in relation to an outer distance N measured along the longitudinal axis H of the cutting blade from edges of the outer teeth of the outer comb to the sharp edge of the cutting blade has a ratio of about 1.0.
8. A safety razor according to claim 7, the inner distance BB is between about 0.508 mm and about 1.016 mm.
9. A safety razor according to claim 8, wherein the inner distance BB is about 0.762 mm.
10. A safety razor according to claim 7, wherein the outer distance N is between about 0.508 mm and about 1.016 mm.
11. A safety razor according to claim 10, wherein the outer distance N is about 0.762 mm.
12. A safety razor according to claim 7, a flat plane defined by edges of the outer teeth of the outer comb and the inner guard edge of the inner guard, wherein a guard to guard distance along the flat plane from the inner guard edge of the inner guard to the edges of the outer teeth of the outer comb is between about 1.5 mm and about 2.54 mm.
13. A safety razor according to claim 12, wherein the guard to guard distance along the flat plane from the inner guard edge of the inner guard to the inside edge of the outer comb is about 2.3622 mm.
14. A safety razor according to claim 1, a flat plane defined by edges of the outer teeth of the outer comb and the inner guard edge of the inner guard, wherein an inner distance along the flat plane from the inner guard edge of the inner guard to a sharp edge of a cutting blade in relation to an outer distance along the flat plane from edges of the outer teeth of the outer comb to a sharp edge of a cutting blade has a ratio of about 1.74.
15. A safety razor according to claim 14, wherein the inner distance is between about 0.762 mm and about 1.6 mm.
16. A safety razor according to claim 15, wherein the inner distance is about 1.4986 mm.
17. A safety razor according to claim 14, wherein the outer distance along the flat plane from the edges of the outer teeth of the outer comb to the sharp edge of the cutting blade is between about 0.254 mm and about 0.889 mm.
18. A safety razor according to claim 17, wherein the outer distance along the flat plane from edges of the outer teeth of the outer comb to the sharp edge of the cutting blade is about 0.8636 mm.
19. A safety razor according to claim 1, wherein the inner guard comprises an inner comb to at least partially form the inner guard edge of the inner guard comprising a row of inner teeth running along the planar surface of the cutting blade.
20. A safety razor according to claim 1, further comprising another cutting blade having another planar surface and comprising another sharp edge; another outer comb comprising another row of another outer teeth running along the another planar surface on another outside of the another cutting blade, wherein the another row of another outer teeth comprises other outer teeth edges; another inner guard comprising another inner guard edge running along the another planar surface on another inside of the another cutting blade; and wherein the shaver handle is further coupled to the another cutting blade, the another outer comb, and the another inner guard and having its longitudinal axis always substantially perpendicular to the another sharp edge of the another cutting blade, wherein the another outer comb is between the body shaver handle and the another cutting blade; and wherein the another cutting blade is held in a position between the another outer comb and the another inner guard.
21. A safety razor according to claim 20, wherein the sharp edge of the cutting blade projects from the inner guard up to a flat plane defined by edges of the outer teeth of the outer comb and the inner guard edge of the inner guard; and wherein the another sharp edge of the another cutting blade projects from the another inner guard up to another flat plane defined by edges of the other outer teeth of the another outer comb and the another inner guard edge of the another inner guard.
22. A safety razor according to claim 1, wherein the cutting blade is a flexible cutting blade.
23. A safety razor according to claim 1, wherein the shaver handle is a short facial shaver handle.
24. A safety razor according to claim 1, wherein the sharp edge of the cutting blade projects from the inner guard up to a flat plane defined by edges of the outer teeth of the outer comb and the inner guard edge of the inner guard.
25. A safety razor according to claim 1, wherein the shaver handle is an elongated back shaver handle.
26. A method of using the safety razor of claim 25 for shaving hair on skin of a user, comprising the steps of: (a) obtaining the safety razor; (b) a hand of the user grasping the back shaver handle on a grip of the back shaver handle obtained in said step (a); (c) the user reaching the back shaver handle over a shoulder of the user with the cutting blade facing towards a backside skin of the user; (d) the user applying pressure against the backside skin of the user with the safety razor obtained in said step (a); (e) the user making a movement stroke on the backside skin of the user with the safety razor obtained in said step (a); and (f) the user adjusting the cutting blade of the safety razor by altering the pressure of said step (d) during the movement stroke of said step (e).
27. A method of using a back shaver according to claim 26, wherein said step (f) of the user adjusting the cutting blade comprises the substep of (f)(1) adjusting how far the cutting blade bends towards the outer comb by varying the pressure of the safety razor.
28. A method of using a safety razor according to claim 26, wherein, in the safety razor obtained in said step (a), the planar surface on an outside of the cutting blade is parallel with and adjacent to a portion of the outer comb; and the planar surface on an inside of the cutting blade is parallel with and adjacent to a portion of the inner guard.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
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DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
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(22) In the first embodiment the sharp edge 120 of the cutting blade 110 does not protrude the skin planar surface A. As will be seem in each of the first through the fourth embodiments, the sharp edge 120 of the cutting blade 110 does not protrude the skin planar surface A. A cutting blade 110 made of stainless steel extends along a path intermediate of a deep void 160 and inner guard 130. It should be known the preferred cutting blade 110 exposure is less than about 0.030 inches (about 0.0762 centimeter). A strong opposing force of at least 10 pounds (4.536 kilograms (10 pounds)) may be applied while protecting and minimizing cutting or nicking on a skin surface when the apparatus engages.
(23) A sharp edge 120 opposite of cutting blade end 220 is dependent on shaving blade geometry in order to produce greater or lesser friction. One characteristic in creating a lesser friction between sharp edge 120 of cutting blade 110 and a skin surface contour A is presented in this invention wherein a sharp edge 120 of a cutting blade 110 is prohibited from protruding said skin surface contour A. In the efforts to promote less friction, the level of distance between the base 200 and the sharp edge 120 of the cutting blade 110 will be substantial. Flexibility of cutting blade 110 is dependent upon the distance exhibited between a base 200 and sharp edge 120 wherein the greater the margin of distance the more flexibility is exhibited which results in less friction between sharp edge 120 and skin surface when opposing force is applied. An extremely decreased level of friction by an extremely flexible cutting blade 110 wherein said sharp edge 120 of cutting blade 110 does not protrude flat plane of a skin surface contour A and allows for a shave where lubricant is not a recommended application. The less the level of distance between base 200 and sharp edge 120 the more rigid and less flexible the cutting blade 110. Thus, a more rigid cutting blade 110 would be the result of an increased level of friction between sharp edge 120 of a cutting blade 110 and a skin surface.
(24) An inner guard 130 is a supporting member mounted adjacent of said cutting blade 110 where, within said shaving geometry, inner guard 130 embodies an inner guard edge 180 which with an inside edge 190 of outer teeth tips 150 together create skin surface contour A. Inner guard edge 180 may have teeth wherein teeth possess a web covering in order to hide shorn hairs as will later be further disused and illustrated in
(25) An outer comb 140 having elongated side 210 a row of outer teeth tips 150 and allowing shorn hair to exit the safety razor rearward of outer teeth inside edge 190 as illustrated in
(26) A deep void 160 is spaced intermediately of outer teeth tips 150 and cutting blade 110. Deep void 160 in a preferred embodiment having a preferred thickness “K” of 0.014 inches (0.03556 centimeter) or less in order to control overexposure and over flexibility of said cutting blade 110. The thickness K as described is can be measured between inner side of comb and inner side of the cutting blade 110. The deep void 160 level of thickness limits the level of flexibility of the cutting blade 110 and plays an important role in the preferred level of friction displayed between the sharp edge 120 of a cutting blade 110 and a the skin surface contours in
(27) The skin surface contour A is flat when not pressed by the safety razor 100. When the safety razor 100 is pressed against the skin surface contour A during shaving, the skin surface contours B or C result as illustrated in
(28) The skin surface contours B or C have a convex skin surface contour between a pair of skin indents respectively created between both the outer comb 140 and the inner guard 130. When both the inside edge 190 of the outer comb 140 and the inner guard edge 180 of the inner guard 130 press into the skin, the recessed sharp edge 120 moves relatively closer towards the skin surface contour B or C of the skin when cutting the hair.
(29) The outer comb 140 and the inner guard 130 simultaneously touch the skin surface during shaving and can also firmly press respective indents into the skin surface during shaving. Thus the convex contour between a pair of skin indents is respectively created between both the outer comb 140 and the inner guard 130 pressing into the skin surface. Because the present inventions are suitable for dry shaving, without a shaving cream or surface lubricant, the inner guard 130 can firmly press against the skin surface and there is no concern about shaving cream or skin lubricant removal by scraping from the skin surface before the skin surface and hair hit the sharp edge 120 of the cutting blade 110.
(30) Letter designations in the drawings depict certain planes, gap distances and contours, defined throughout, and for convenience are summarily defined wherein: “L” references the deep void 160 running lengthwise from the outer teeth tips 150 to the base 200 which allows ample space for the flexibility of said cutting blade 110 to perform “K′ references the thickness of the said deep void 160 between the outer comb 140 and the cutting blade 110 which is a contributing factor in the level of flexibility the cutting blade 110 illustrates when shaving; “A” references the skin surface contour A which is formed between the inside edge 190 of the outer teeth tips 150 and the inner guard edge 180. Skin surface contour A is also referenced as being the “first position” when safety razor 100 initially engages a skin surface contour A; “B” references a convex skin surface contour A engaged in a convex surface contour in a second position as indicated in
(31) The safety razor 100 removes hair from skin using the cutting blade 110 comprising a sharp edge 120 along an elongated side 210 of a planar surface. An outer comb 140 has a row of outer teeth 140 running along the planar surface on an outside of the cutting blade 110, each of the outer teeth of the outer comb 140 is substantially perpendicular to the sharp edge 120 and spaced with a deep void 160 between the row of the outer comb 140 and the planar surface of the cutting blade 110, wherein ends of the outer comb 140 comprise outer teeth tips 150. An inner guard 130 runs along the planar surface on an inside of the cutting blade 110. The sharp edge 120 of cutting blade 110 is recessed up to a skin surface contour A. The skin surface contour defined from the inside edges 190 of outer teeth tips 150 to the inner guard edge 180. When cutting blade 110 is flexing said cutting blade 110 longitudinally bends in a curved-like arc while sharp edge 120 of cutting blade 110 causing further recess D relative to the skin surface contour A. The sharp edge of the cutting blade can longitudinally bend to cause further recess relative to the skin surface contour. The cutting blade 110 is fixedly anchored on the cutting blade end 220 opposite the sharp edge 120.
(32) The inner guard 130 may comprise an inner comb comprising a row of inner teeth running along the elongated side of an inside of the cutting blade 110, each of the inner teeth substantially perpendicular to the sharp edge 120.
(33) A user for hair removal moves the safety razor 100 across skin such that the outer comb 140 extends over the cutting blade 110 to contact the hair before the hair comes in contact with the sharp edge 120. Prior to the shaving operation or flexing of the cutting blade 110 the inner guard 130 can have substantially no void between the cutting blade 110 and inner guard 130. When the safety razor 100 moves across the skin, the hair first passes through the outer comb 140 and then second the sharp edge 120 of the cutting blade 110 bends in a direction towards the outer comb 140 against a skin surface contour shortening the width of the gap G between the sharp edge 120 of the cutting blade 110 and the row of outer teeth of the outer comb 140 in
(34) The safety razor 100 is moved across skin such that an outer comb 140 extends over the cutting blade 110 to contact hair before the hair comes in contact with a sharp edge 120. When moving the safety razor 100 across skin, the hair first passes through the outer teeth of the outer comb 140 and second then the sharp edge 120 of the cutting blade 110 bends in a direction to shorten the width of the gap G between the sharp edge 120 of the cutting blade 110 and the row of outer teeth of the outer comb 140 and the hair is cut by the sharp edge 120.
(35) A deep void 160 exists between the planar surface of the cutting blade 110 and the outer comb 140 in the first and second and third and fourth embodiments of respective
(36) An opening G between the sharp edge 120 of cutting blade 110 and inside edges 190 of the outer teeth tips 150 of the outer comb 140 has a dimension G the same or less than a dimension J of an opening J between the sharp edge 120 of cutting blade 110 and an inner guard edge 180 of the inner guard 130. A dimension of the deep void 160 has a depth extending from the outer teeth tips 150 to a base 200 of the outer comb 140 substantially greater than a dimension G of the gap G. A dimension of the gap G is chosen in connection with the preferred distance of a base 200 from the sharp edge 120 of a cutting blade 110. It should be noted that the closer the base 200 is in distance to the sharp edge 120 of a cutting blade 110 the smaller the gap G becomes. The further away the base 200 is in distance to the sharp edge 120 of the cutting blade 110, the larger the gap G may become.
(37) A problem with prior safety razors is that while they do offer a level of protection when contouring within the shaving process, it is widely known that in order to attain such a close shave that they still do require and create a cutting blade flexibility and exposure that is far too rigid to create a controlled atmosphere that would allow one to dry shave a hard-to-reach area such as one's back without application of shaving cream. More often in order to create a safety razor that navigates angles and bumps we see the safety razor 100 housing or “cartridge” being altered while the cutting blade 110 remains rigid. The strong friction is often illustrated in today's market between the sharp edge 120 of the cutting blade 110 and a skin surface which is why the application of shaving cream or shaving gel prior to shaving is recommended in order to minimize the cutting or nicking of the skin surface. The prior safety razors do not allow a controlled shaving geometry that minimizes cutting blade 110 exposure while offering a level of flexibility take place without the use of shaving cream or gel in order to greatly minimize cutting or bleeding. One common factor amongst the majority of safety razors is that the cutting blade, although engaging by guards that may assist in deflection when engaging a skin surface, often embody a cutting blade that is capable of protruding a skin surface contour A that is formed between an inner guard edge 180 and the inside edge 190 of the outer teeth tips 150. Another important missing characteristic of the prior art is that there does not exist an opening G between the sharp edge 120 of cutting blade 110 and an inside edge 190 that remains the same level of distance or less than an opening represented by J which exists between the sharp edge 120 of cutting blade 110 and an inner guard edge 180 of the inner guard 130. A final important notation is that a cutting blade 110 that is most commonly found within razors today do not embody a preferred level of distance between a sharp edge 120 and a base 200 that would allow for a proper amount of cutting blade 110 flexibility which creates an extremely light or soft level of friction between sharp edge 120 of a cutting blade 110 and a skin surface.
(38) Furthermore, in embodiments of the present inventions there is a deep void 160 that is specified in
(39) In an additional embodiment of the safety razor 100, an inner rearward distance EBB from a vertical plane of the sharp edge 120 of the flexible cutting blade 110 to a vertical plane of the to the inner guard edge of the inner guard 130 in relation to an outer rearward distance N from a vertical plane of the inside edge 190 of the outer comb 140 to a vertical plane of the sharp edge 120 of the flexible cutting blade 110 has a ratio of about 1. In other words, in this embodiment, the inner rearward distance BB and the outer rearward distance N are substantially the same. The inner rearward distance BB from the vertical plane of the sharp edge 120 of the flexible cutting blade 110 to the vertical plane of the inner guard edge of the inner guard 130 is about 0.508 mm to about 1.016 mm. A preferred inner rearward distance BB from the vertical plane of the sharp edge 120 of the flexible cutting blade 110 to the vertical plane of the inner guard 130 is about 0.762 mm. Also, the outer rearward distance N from the vertical plane of the inside edge 190 of the outer comb 140 to the vertical plane of the sharp edge 120 of the flexible cutting blade 110 is about 0.508 mm to about 1.016 mm. A preferred outer rearward distance N from the vertical plane of the inside edge 190 to the vertical plane of the sharp edge 120 is about 0.762 mm. In this discussion of an additional embodiment, the diagonal distance E, diagonal distance J, and diagonal distance G are also effected and have alternate dimensions as well. Diagonal distance E may be about 1.54 mm to about 2.54 mm. A preferred diagonal distance E is about 2.3622 mm. Diagonal distance J may be about 0.762 mm to 1.6 mm. A preferred distance J is about 1.4986 mm. Diagonal distance G may be about 0.254 mm to about 0.889 mm. A preferred diagonal distance G is about 0.8636 mm. Furthermore, the inner guard 180 having an inside end 360 and an outer edge 180 wherein the distance between the inside end 360 and the outer edge 180 is considered the inner guard 130 inside wall 370. The inside wall 370 distance is referenced as distance M. Distance M is about 0.381 mm to about 0.889 mm. A preferred distance M is about 0.61 mm. The distance M is the same or greater than a thickness “K” of a deep void 160. It is important to note that diagonal distance J is substantially equal or greater than distance G. It is important to note that the skin convex enters and stretches inside of the outer edge 180 and inside edge 190 it is preferable to have a greater diagonal distance J in comparison to diagonal distance G. Having a greater diagonal distance J allows the stretching skin convex to press against the cutting blade 110 and bending the cutting blade 110 towards the inside of the outer comb 140. If diagonal distance J was less than diagonal distance G the skin convex will have a harder time pressing the cutting blade 110 towards the inside of the outer comb 140 and the cutting blade 110 becomes more likely to poke into the skin as a dagger instead of at an cutting angle between the sharp edge 120 of the cutting blade 110 and the skin surface.
(40) The inner edge of the inner guard 130 and the inside edge 190 of the outer comb 140 in practice are blunt or curved edges because no corner is perfectly sharp or square. If the inner edge of the inner guard 130 and the inside edge 190 of the outer comb 140 were perfectly sharp or square, they would risk cutting into the skin or feel uncomfortable. That being said, there may be a slightly square edge sufficient to indent and grip the skin in order for the skin inside of the inside edge 190 and the inner guard 130 to stretch. These ends are the outermost horizontal dimension to the end or tip of the inner guard 130 or the outer comb 140. Therefore the inner rearward distance BB and outer rearward distance N are stated measured from respective ends of the inner guard 130 and the outer comb 140. The trailing opening J takes a shape of an imaginary triangle. The imaginary triangle has three sides. The first side runs between the outer edge 180 and the plane of the cutting blade 110. The second side runs from where the inner guard 130 and the plane of the cutting blade 110 meet. The third and final side is where the flat skin plane A is inside of the sharp edge 120 and the outer edge 180. In other alternate embodiments the imaginary triangle may be a right triangle or an isosceles triangle or an isosceles right triangle. The trailing opening J cross sectional has three triangular corners or vertices which have three walls but it is not a perfect triangle being that the three walls or sides of the vertices are not always flat.
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(43) In an additional embodiment of the safety razor 100, an inner rearward distance BB from a vertical plane of the sharp edge 120 of the flexible cutting blade 110 to a vertical plane of the inner guard edge of the inner guard 130 in relation to an outer rearward distance N from a vertical plane of the inside edge 190 of the outer comb 140 to a vertical plane of the sharp edge 120 of the flexible cutting blade 110 has a ratio of about 1. In other words, in this embodiment, the inner rearward distance BB and the outer rearward distance N are substantially the same. The inner rearward distance BB from the vertical plane of the sharp edge 120 of the flexible cutting blade 110 to the vertical plane of the inner guard edge of the inner guard 130 is about 0.508 mm to about 1.016 mm. A preferred inner rearward distance BB from the vertical plane of the sharp edge 120 of the flexible cutting blade 110 to the vertical plane of the inner guard 130 is about 0.762 mm. Also, the outer rearward distance N from the vertical plane of the inside edge 190 of the outer comb 140 to the vertical plane of the sharp edge 120 of the flexible cutting blade 110 is about 0.508 mm to about 1.016 mm. A preferred outer rearward distance N from the vertical plane of the inside edge 190 to the vertical plane of the sharp edge 120 is about 0.762 mm. In this discussion of an additional embodiment the diagonal distance E, diagonal distance J, and diagonal distance G are also effected and have alternate dimensions as well. Diagonal distance E may be about 1.54 mm to about 2.54 mm. A preferred diagonal distance E is about 2.3622 mm. Diagonal distance J may be about 0.762 mm to 1.6 mm. A preferred distance J is about 1.4986 mm. Diagonal distance G may be about 0.254 mm to about 0.889 mm. A preferred diagonal distance G is about 0.8636 mm. Furthermore, the inner guard 180 having an inside end 360 and an outer edge 180 wherein the distance between the inside end 360 and the outer edge 180 is considered the inner guard 130 inside wall 370. The inside wall 370 distance is referenced as distance M. Distance M is about 0.381 mm to about 0.889 mm. A preferred distance M is about 0.61 mm. The distance M is the same or greater than a thickness “K” of a deep void 160. It is important to note that diagonal distance J is substantially equal or greater than distance G. It is important to note that the skin convex enters and stretches inside of the outer edge 180 and inside edge 190 it is preferable to have a greater diagonal distance J in comparison to diagonal distance G. Having a greater diagonal distance J allows the stretching skin convex to press against the cutting blade 110 and bending the cutting blade 110 towards the inside of the outer comb 140. If diagonal distance J was less than diagonal distance G the skin convex will have a harder time pressing the cutting blade 110 towards the inside of the outer comb 140 and the cutting blade 110 becomes more likely to poke into the skin as a dagger instead of at an cutting angle between the sharp edge 120 of the cutting blade 110 and the skin surface.
(44) The inner edge of the inner guard 130 and the inside edge 190 of the outer comb 140 in practice are blunt or curved edges because no corner is perfectly sharp or square. If the inner edge of the inner guard 130 and the inside edge 190 of the outer comb 140 were perfectly sharp or square, they would risk cutting into the skin or feel uncomfortable. That being said, there may be a slightly square edge sufficient to indent and grip the skin in order for the skin inside of the inside edge 190 and the inner guard 130 to stretch. These ends are the outermost horizontal dimension to the end or tip of the inner guard 130 or the outer comb 140. Therefore the inner rearward distance BB and outer rearward distance N are stated measured from respective ends of the inner guard 130 and the outer comb 140.
(45) The trailing opening J takes a shape of an imaginary triangle. The imaginary triangle has three sides. The first side runs between the outer edge 180 and the plane of the cutting blade 110. The second side runs from where the inner guard 130 and the plane of the cutting blade 110 meet. The third and final side is where the flat skin plane A is inside of the sharp edge 120 and the outer edge 180. In other alternate embodiments the imaginary triangle may be a right triangle or an isosceles triangle or an isosceles right triangle. The trailing opening J cross sectional has three triangular corners or vertices which have three walls but it is not a perfect triangle being that the three walls or sides of the vertices are not always flat.
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(63) The cutting blade 110 is at an angle nearly parallel to both the outer comb 140 and the inner guard 130 in embodiments. The cutting blade 110 of embodiments longitudinally bends in a direction of uncut hairs when the safety razor 100 is moved across the skin surface. The sharp edge of the cutting blade can longitudinally bend to cause further recess relative to the skin surface contour. This bend is in a direction less perpendicular to the skin surface. In embodiments of the present inventions, the cutting blade 110 in the safety razor 100 performs less rigidly against the skin surface and hair than in most prior razors. The deeper the void, the more the blade is cantilevered and the less rigid is its flexibility. Alternately, with a springier cutting blade 110 material or an inner spring, the blade has more flexibility. Such contributes to enhanced performance on dry conditions knowing that the closest save is not a highest priority on certain skin such as self-shaving the skin surface of ones back with a long handle 280 and no mirror.
(64) A user of the safety razor 100 of embodiments can adjust how far the sharp edge 120 digs into the user's skin by varying the pressure of the safety razor 100 thereby adjusting how far the cutting blade 110 longitudinally bends. This may in some embodiments adjust the relative blade recess depth from the skin. These embodiments can be one mechanism for a user who feels adverse cutting feedback to adjust the blade recess by altering the pressure during the movement stroke. In other embodiments the cutting blade may be configured so altering speed or intensity of the movement stroke adjusts the blade recess.
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(66) The term “flexible”, as described previously in the first and second embodiment, is intended to describe the amount of bending or curved margin D the cutting blade 110 is granted in response to normal human opposing shaving forces. The “flexibility” of the cutting blade 110 in the first embodiment of
(67) A low friction between sharp edge 120 and a skin surface is illustrated in the first through the fourth embodiments illustrated in
(68) It is important to note in embodiments of the present inventions preferred cutting axis is a cutting axis between 20-50 degrees. An axis outside of 20-50 degrees, though may be accomplished, proves difficult when accessing petite skin surface areas whereby the risk of cutting or razor burn is greatly increased.
(69) In further contrast to prior art the current invention does not require the razor blades to be exposed to water or shaving cream in order to offer a clean and close shave or to protect from cutting, nicking or skin irritation. This is a very important factor of the present inventions since application of shaving cream or lubricant can be extremely time consuming especially when applying to one's back side. Thus, not requiring the shaving cream lubricant is very time efficient. Furthermore, because the cutting blade 110 may be made from stainless steel the invention allows the safety razor 100 to last longer without any rusting since water and shaving cream, which will cause erosion or rust, is not necessary.
(70) The preferred distance of separation between the inner guard edge 180 and the sharp edge 120 is a preferable margin of about 0.030 inches (about 0.0762 centimeter). The preferred distance of separation between the sharp edge 120 and the outer comb 140 inside edge 190 is about 0.032 inches (about 0.08128 centimeter). The preferred thickness of inner guard 130 is about 0.024 inches (about 0.06096 centimeter) or less. The preferred thickness of outer teeth tips 150 is about 0.026 inches (about 0.06604 centimeter) or less. The preferred cutting blade 110 exposure is about 0.030 inches (about 0.0762 centimeter) or less. Although the shaving geometry can be accomplished outside of these measurements these are preferred.
(71) Although the invention is described herein with reference to specific embodiments, various modifications and changes can be made without departing from the scope of the present inventions as set forth in the claims below. Accordingly, the specification and figures are to be regarded in an illustrative rather than a restrictive sense, and all such modifications are intended to be included within the scope of the present inventions. They can have different configurations than the examples illustrated in the drawings. Any benefits, advantages, or solutions to problems that are described herein with regard to specific embodiments are not intended to be construed as a critical, required, or essential feature or element of any or all the claims.
(72) Any letter designations such as (a) or (b) etc. used to label steps of any of the method claims herein are step headers applied for reading convenience and are not to be used in interpreting an order or process sequence of claimed method steps. Any method claims that recite a particular order or process sequence will do so using the words of their text, not the letter designations.
(73) Unless stated otherwise, terms such as “first” and “second” are used to arbitrarily distinguish between the elements such terms describe. Thus, these terms are not necessarily intended to indicate temporal or other prioritization of such elements.