Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
  • B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
  • B26B21/40—Details or accessories
  • B26B21/52—Handles, e.g. tiltable, flexible
  • B26B21/521—Connection details, e.g. connection to razor heads
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
  • B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
  • B26B21/08—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor involving changeable blades
  • B26B21/14—Safety razors with one or more blades arranged transversely to the handle
  • B26B21/22—Safety razors with one or more blades arranged transversely to the handle involving several blades to be used simultaneously
  • B26B21/222—Safety razors with one or more blades arranged transversely to the handle involving several blades to be used simultaneously with the blades moulded into, or attached to, a changeable unit
  • B26B21/225—Safety razors with one or more blades arranged transversely to the handle involving several blades to be used simultaneously with the blades moulded into, or attached to, a changeable unit the changeable unit being resiliently mounted on the handle
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
  • B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
  • B26B21/40—Details or accessories

Definitions

• the present invention relates to the construction of shaving razors, in which an adapter unit provides an interface between a razor blade carrier and a razor handle engaging member.
• a manufacturer of shaving razors may manufacture shaving razors of a wide variety of designs.
• many designs have been developed with respect to the interconnection of razor blade carriers and razor handles.
• a manufacturer For example, for the sake of manufacturing efficiency, it would be advantageous for a manufacturer to be able to use a standardized razor blade carrier with multiple razor handle designs or a standardized razor handle with multiple razor blade carrier designs. In addition, it would be commercially attractive for a. manufacturer to produce a standardized razor handle that would be compatible with various commercially available razor blade carrier designs. In addition, it would be advantageous for a manufacturer to be able to use new razor handle designs with older razor blade carrier designs to extend the life of the older razor blade carrier designs. Furthermore, it would be advantageous for a manufacturer to use new razor blade carrier designs with older razor handle designs to facilitate the transition to new razor blade carrier designs.
• a razor cartridge for use with a razor handle having a handle engagement member extending from one end thereof.
• the razor cartridge includes a razor blade carrier having a carrier engagement member thereon, and an adapter unit having a first side and a second side.
• the first side of the adapter unit has an adapter engagement member that is lockingly mateable with the carrier engagement member.
• At least one of the adapter engagement member and the carrier engagement member are resiliently yieldable, such that the adapter engagement member and the carrier engagement member may be snapped into non-detachable engagement with each other.
• the second side of the adapter unit has means for attachably mating the razor cartridge with the handle engagement member.
• a manufacturer of shaving razors may mass produce a standardized razor blade carrier for all of its various models of shaving razors, and use different adapter units to adapt the standardized razor blade carrier to different designs of razor handle engagement members. Since the economies of scale of mass producing the standardized razor blade carrier will typically outweigh the added cost of producing the relatively simple adapter unit of the present invention, a manufacturer may reduce its overall costs of manufacturing different razor designs.
• the carrier engagement member of the razor cartridge may comprise one or more claws, and the adapter engagement member may comprise an elongated projection.
• the carrier engagement member may comprise one or more slots, and the adapter engagement member may comprise one or more tabs.
• a razor cartridge for use with a razor handle having a handle engagement member extending from one end thereof.
• the razor cartridge includes a razor blade carrier having a carrier engagement member thereon, and an adapter unit having a first side and a second side.
• the first side of the adapter unit has a first adapter engagement member lockingly mateable with the carrier engagement member, with at least one of the first adapter engagement member and the carrier engagement member being resiliently yieldable, such that the first adapter engagement member and the carrier engagement member may be snapped into non-detachable engagement with each other.
• the second side of the adapter unit has a second adapter engagement member pivotably mateable with the handle engagement member, at least one of the second adapter engagement member and the handle engagement member being resiliently yieldable, such that the second adapter engagement member and the handle engagement member may be snapped into pivotable engagement with each other.
• the carrier engagement member of the razor blade carrier may comprise one or more claws, and the first adapter engagement member may comprise an elongated projection.
• the carrier engagement member may comprise one or more slots, and the first adapter engagement member may comprise one or more tabs.
• the second adapter engagement member of the adapter unit may be detachable or non-detachable from the handle engagement member.
• the handle engagement member may comprise a projection with a rounded end
• the adapter engagement member may comprise a socket for receiving the projection.
• the socket comprises a plurality of resilient fingers.
• a razor cartridge for use with a razor handle having a handle engagement member extending from one end thereof.
• the razor cartridge includes a razor blade carrier having first and second carrier engagement members thereon.
• the second carrier engagement member is pivotably engageable with the handle engagement member.
• the razor cartridge also includes an adapter unit having a first side and a second side, the first side having an adapter engagement member lockingly mateable with the first carrier engagement member, with at least one of the adapter engagement member and the first carrier engagement member being resiliently yieldable, such that the adapter engagement member and the first carrier engagement member may be snapped into non-detachable engagement with each other.
• the second side of the adapter unit has an aperture for guiding the handle engagement member into pivotable engagement with the second carrier engagement member.
• the first carrier engagement member may comprise one or more claws, and the adapter engagement member may comprise an elongated projection.
• the first carrier engagement member may comprise one or more slots, and the adapter engagement member may comprise one or more tabs.
• the aperture comprises tapered inner walls.
• the razor handle may have a central, projecting tongue
• the adapter unit may have a socket for loosely receiving the tongue, such that when the handle and the adapter unit are engaged, the central, projecting tongue and the socket cooperate to limit the pivoting range of the handle with respect to the razor cartridge.
• the adapter unit of the present invention may advantageously be an injection- molded, plastic piece.
• a method of manufacturing razor cartridges for use with a first razor handle and a second razor handle includes the steps of manufacturing first and second substantially identical razor blade carriers having substantially identical first and second carrier engagement members thereon, respectively; manufacturing a first adapter unit having two sides, a first side having a first adapter engagement member mateable with the first carrier engagement member, with at least one of the first adapter engagement member and the first carrier engagement member being resiliently yieldable, and a second side having means for attachably mating the first razor blade carrier with the first razor handle; and manufacturing a second adapter unit having two sides, a first side having a second adapter engagement member mateable with the second carrier engagement member, with at least one of the second adapter engagement member and the second carrier engagement member being resiliently yieldable, and a second side having means for attachably mating the second razor blade carrier with the second razor handle.
• the method also includes the steps of forming a first razor cartridge for use with the first razor handle by engaging the first adapter unit with the first razor blade carrier through the resiliently yieldable cooperation of the first adapter engagement member with the first carrier engagement member and forming a second razor cartridge for use with the second razor handle by engaging the second adapter unit with the second razor blade carrier through the resiliently yieldable cooperation of the second adapter engagement member with the second carrier engagement member.
• a method of manufacturing razor handles for use with a first razor blade carrier and a second razor blade carrier includes the step of manufacturing first and second substantially identical razor handles having substantially identical first and second handle engagement members thereon, respectively.
• the method includes the step of manufacturing a first adapter unit having two sides, a first side having a first adapter engagement member mateable with the first handle engagement member, with at least one of the first adapter engagement member and the first handle engagement member being resiliently yieldable, and a second side having a second adapter engagement member mateable with the first carrier engagement member, with at least one of the second adapter engagement member and the first carrier engagement member being resiliently yieldable.
• the method includes the step of manufacturing a second adapter unit having two sides, a first side having a third adapter engagement member mateable with the second handle engagement member, with at least one of the third adapter engagement member and the second handle engagement member being resiliently yieldable, and a second side having a fourth adapter engagement member mateable with the second carrier engagement member, with at least one of the fourth adapter engagement member and the second carrier engagement member being resiliently yieldable.
• the method also includes the steps of engaging the first adapter unit with the first razor handle through the resiliently yieldable cooperation of the first adapter engagement member with the first handle engagement member and engaging the second adapter unit with the second handle through the resiliently yieldable cooperation of the third adapter engagement member with the second handle engagement member.
• Figs. 3 and 4 are exploded isometric views of a shaving razor including the adapter unit according to the preferred embodiment of Figs. 1 and 2;
• Figs. 5 and 6 are isometric views of the shaving razor of Figs. 3 and 4 with the razor blade carrier, adapter unit, and handle engaged;
• Figs. 7 and 8 are isometric views of an adapter unit according to another preferred embodiment of the present invention
• Fig. 9 is an exploded isometric view of a shaving razor including the adapter unit according to the preferred embodiment of Figs. 7 and 8;
• Fig. 10 is an isometric view of the shaving razor of Fig. 9, with the razor blade carrier, adapter unit, and handle engaged;
• Figs. 11 and 12 are exploded side views of a shaving razor including the adapter unit according to the preferred embodiment of Figs. 7 and 8;
• Figs. 13 and 14 are isometric views of an adapter unit according to another preferred embodiment of the present invention.
• Fig. 15 is an exploded isometric view of a shaving razor including the adapter unit according to the preferred embodiment of Figs. 13 and 14.
• FIGs. 1 and 2 show isometric views of an adapter unit 10 according to a first preferred embodiment of the present invention.
• the adapter unit 10 includes an elongated, generally rectangular base 12 having a bottom side 14a and a top side 14b.
• the bottom side 14a includes two groups of resilient fingers 16a and 16b disposed on opposite ends of the longitudinal axis of the base 12.
• the two groups of resilient fingers 16a and 16b form the boundaries of two spherically-shaped cavities 26a and 26b, respectively.
• the bottom side 14a may include rounded depressions further delineating the boundaries of the spherically-shaped cavities.
• four resilient fingers for each group is preferred, but any number of fingers operable to form the boundaries of a spherically-shaped cavity may be used.
• the bottom side 14a also includes a central socket 18.
• the central socket 18 includes a notch 20 running perpendicular to the plane of the bottom side 14a.
• the top side 14b includes projections extending outwardly from its longitudinal edges. Along the length of one longitudinal edge of top side 14b, there is disposed an elongated projection 22. Along the other longitudinal edge of top side 14b, there are disposed a pair of projecting tabs 24a and 24b, as shown in Fig. 2. Referring to Fig. 2, the tabs 24a and 24b are disposed on opposite ends of the longitudinal axis of the base 12.
• the top side 14b also includes a pair of projections 28a and 28b extending from the top side 14b and running perpendicular to the longitudinal edges of top side 14b.
• Figs. 3 to 6 show isometric views of a shaving razor including a standardized razor blade carrier 30, the adapter unit 10 of Figs. 1 and 2, and a razor handle end 50.
• the shaving razor is shown before engagement of the razor blade carrier 30, adapter unit 10, and razor handle end 50.
• the shaving razor is shown with the razor blade carrier 30, adapter unit 10, and handle end 50 engaged together.
• the razor blade carrier 30 is an elongated, generally rectangular structure. The axis of elongation is parallel to the cutting edge of the razor blade or blades contained in the razor blade carrier (blades not shown).
• the razor blade carrier 30 may include any of the blade, guard, and cap features that are well-known in the art (not shown).
• the razor blade carrier 30 includes a bottom base 32 with a resilient lip 44 formed around it. In the center of the base 32, a plateau-like projection 34 extends from the base 32. The plateau-like projection 34 is shaped to fit in between the projections 28a and 28b on the adapter unit 10.
• a pair of support structures 40a and 40b extend from the base 32.
• a plurality of claws 36 are disposed on the lip 44 along one of the longitudinal sides of the razor blade carrier 30.
• a pair of slots 38a and 38b are formed in the support structures 40a and 40b, respectively, on the side of the razor blade carrier 30 opposite from the claws 36.
• the standardized razor blade carrier 30 also includes a pair of cylindrical shafts 42a and 42b formed in the support structures 40a and 40b, respectively, which together define a pivot axis for the razor blade carrier 30 for certain handle designs.
• the cylindrical shafts 42a and 42b are not utilized in the embodiment of Figs. 3 to 6, but will be utilized in a later embodiment.
• the razor handle end 50 is bifurcated into two arms 54a and 54b, which form a V-shape.
• the two arms 54a and 54b are joined at their outer ends by a bridge portion 62.
• Each arm 54a and 54b includes a ball-like projection 56a and 56b, respectively, at its end.
• the bridge portion 62 includes a central, projecting tongue 58, which is T-shaped in cross-section.
• the tabs 24a and 24b of the adapter unit 10 are placed within the slots 38a and 38b, respectively, of the razor blade carrier 30.
• the adapter unit 10 is then pivoted about the longitudinal edge on which the tabs 24a and 24b are located until the elongated projection 22 contacts the claws 36.
• Pressure is then exerted on the adapter unit 10 so that, by camming action of the elongated projection 22 on the claws 36, the claws 36 and the lip 44 are pushed outwardly.
• the claws 36 and the lip 44 return to their original positions, thus locking the adapter unit 10 into the razor blade carrier 30, and thereby forming a razor cartridge.
• the plateau-like projection 34 of the razor blade carrier 30 cooperates with the projections 28a and 28b of the adapter unit 10 to guide and stabilize the adapter unit 10 into position.
• the adapter unit 10 permits the razor cartridge formed thereby to be engaged with the handle end 50 by snapping the ball-like projections 56a and 56b of the handle end 50 into the spherical cavities 26a and 26b formed by the groups of resilient fingers 16a and 16b, respectively, of the adapter unit 10.
• the ball-like projections 56a and 56b and the groups of resilient fingers 16a and 16b form a pair of ball-and-socket joints.
• the tongue 58 of the handle end 50 fits into the socket 18 of the adapter unit 10, with the T-shape of the tongue 58 cooperating with the notch 20 of the socket 18 to guide the razor handle end 50 into the adapter unit 10 in the correct orientation for shaving.
• the socket 18 is slightly wider than the tongue 58 leaving room for play between the tongue 58 and the socket 18 so that the razor cartridge, consisting of the razor blade carrier 30 and the adapter unit 10, may be pivoted on the ball-and-socket joints. The play between the socket 18 and the tongue 58 determines the pivot range of the razor cartridge.
• Figs. 7 and 8 show isometric views of an adapter unit 110 according to a second preferred embodiment of the present invention.
• the adapter unit 110 includes an elongated, generally rectangular base 112 having a bottom side 114a and a top side 114b.
• the bottom side 114a includes two pairs of resilient fingers 116a and 116b disposed on opposite ends of the longitudinal axis of the base 112. Each pair of resilient fingers 116a and 116b are adapted to receive a cylindrically shaped structure.
• the bottom side 114a also includes a central socket 118.
• the central socket 118 includes a notch 120 running perpendicular to the plane of the bottom side 114a.
• the top side 114b of the adapter unit 110 includes projections extending outwardly from its longitudinal edges. Running along the length of one longitudinal edge, an elongated projection 122 is disposed on the top side 114b. On the opposite longitudinal edge, there are disposed a pair of projecting tabs 124a and 124b. The top side 114b also includes a pair of projections 128a and 128b extending from the top side 114b and running perpendicular to the longitudinal edges of the top side 114b.
• Figs. 9 and 10 show exploded and assembled isometric views, respectively, of a shaving razor including the standardized razor blade carrier 30 previously described with regard to the embodiment of Figs. 3 to 6, the adapter unit 110 of Figs. 7 and 8, and a razor handle end 150.
• Figs. 11 and 12 show exploded side views of the same shaving razor.
• the handle end 150 is bifurcated into two arms 154a and 154b, which form a V-shape.
• the two arms 154a and 154b are joined at their outer ends by a bridge portion 162.
• the arms 154a and 154b include recesses 160a and 160b, respectively, at their ends.
• the recesses 160a and 160b include therein cylindrically shaped portions 156a and 156b, respectively.
• the bridge portion 162 includes a central, projecting tongue 158, which is T-shaped in cross-section.
• the projections on the top side 114b of the adapter unit 110 are similar to those of the adapter unit 10 of Figs. 1 to 6.
• the adapter unit 110 is engaged to the standardized razor blade carrier 30 in the same manner as has been described with respect to the adapter unit 10 to thereby form a razor cartridge.
• the handle end 150 is engaged with the adapter unit 110 by snap fitting the rounded portions 156a and 156b into the two pairs of resilient fingers 116a and 116b, respectively.
• the tongue 158 fits into the socket 118, with the T-shape of the tongue 158 cooperating with the notch 120 of the socket 118 to guide the handle end 150 into the adapter unit 110 in the correct orientation for shaving.
• the socket 118 is slightly wider than the tongue 158 leaving room for play between the tongue 158 and the socket 118 so that the razor cartridge may be pivoted about the cylindrically shaped portions 160a and 160b.
• the play between the socket 118 and the tongue 158 determines the pivot range of the razor cartridge formed by the adapter unit 110 and the razor blade carrier 30.
• FIGs. 13 and 14 show isometric views of an adapter unit 210 according to a third preferred embodiment of the present invention.
• the adapter unit 210 includes an elongated, generally rectangular base 212 having a bottom side 214a and a top side 214b.
• the bottom side 214a includes a pair of guiding structures 216a and 216b disposed at opposite ends of the longitudinal axis of the base 212.
• the guiding structures 216a and 216b are generally rectangular structures with central openings 226a and 226b, respectively, and inner walls that taper towards the central openings.
• the bottom side 214a also contains a pair of extending tapered projections 215a and 215b, located between the guiding structures 216a and 216b.
• the top side 214b includes projections that extend outwardly from its longitudinal edges. Extending outwardly along one longitudinal edge of the top side 214b, there are disposed a pair of elongated projections 222a and 222b. On the opposite longitudinal edge, a pair of projecting tabs 224a and 224b are disposed on the top side 214b.
• the top side 214b also includes a pair of projections 228a and 228b extending therefrom and running perpendicular to the longitudinal edges of the top side 214b.
• Fig. 15 shows an isometric view of a shaving razor including the standardized razor blade carrier 30, the adapter unit 210 of Figs. 14 and 15, and a razor handle end 250. In Fig.
• the adapter unit 210 is shown engaged with the razor blade carrier 30.
• the manner of engagement of the adapter unit 210 with the razor blade carrier 30 is the same as described for the prior two adapter unit embodiments 10 and 110.
• the central openings 226a and 226b are aligned over the openings of the cylindrical shafts 42a and 42b (see Figs. 3 and 4), respectively, on the inside walls of the support structures 40a and 40b of the standardized razor blade carrier 30.
• the razor handle end 250 includes a main casing 255 and, extending from one end of the main casing 255, two arm members 254a and 254b and a central, spring-loaded tongue 258. Extending from the sides of the main casing 255 are two buttons 253a and 253b, which are operatively coupled to the arm members 254a and 254b, in a manner well-known in the art, so as to be able to move the arm members inwardly towards each other.
• the arm members 254a and 254b are normally separated under spring tension from one another by a distance determined by the main casing 255.
• the arm members 254a and 254b contain outwardly extending rounded pins 256a and 256b, respectively, which define a pivot axis for the handle end 250.
• the dimensions of the rounded pins 256a and 256b are such that they fit into the cylindrical shafts 42a and 42b of the standardized razor blade carrier 30, enabling the razor cartridge formed by the standardized razor blade carrier 30 and the adapter unit 210 to pivot with respect to the handle end 250.
• the arm members 254a and 254b are pushed into the guiding structures 216a and 216b of the adapter unit 210.
• the tapered walls of the guiding structures 216a and 216b guide the rounded pins 256a and 256b into the openings of the cylindrical shafts 42a and 42b (see Figs. 3 and 4) of the razor blade carrier 30, respectively.
• the central, spring- loaded tongue 258 cooperates with the bottom side 214a of the adapter unit 210 to bias the razor cartridge to a neutral, rest position.
• the camming action of the central tongue 258 against the bottom side 214a compresses the spring-loaded, central tongue 258 into the main casing 255.
• the compressed, spring-loaded, central tongue 258 acts in reverse against the bottom side 214a to return the razor cartridge to its original, rest position.
• the projections 215a and 215b prevent the central tongue 258 from moving side to side.
• the adapter units of the present invention are composed of plastic and are produced by a two-plate injection molding process.
• the mold has a core pin that is not mechanically activated.
• the plastic material is preferably either polystyrene or ABS.
• the razor blade carriers and handles to be used with the adapter unit of the present invention can be made with any of the materials and processes that are well-known in the art for making such components.

Landscapes

• Life Sciences & Earth Sciences (AREA)
• Forests & Forestry (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
• Dry Shavers And Clippers (AREA)

Applications Claiming Priority (1)

Publications (3)

Family

ID=22267927

Family Applications (1)

Country Status (11)

Cited By (3)

Families Citing this family (19)

Citations (3)

Family Cites Families (9)

• 1998
  • 1998-09-24 MX MXPA01002969A patent/MXPA01002969A/es active IP Right Grant
  • 1998-09-24 CA CA002344872A patent/CA2344872C/en not_active Expired - Lifetime
  • 1998-09-24 CN CNB988143321A patent/CN1200797C/zh not_active Expired - Lifetime
  • 1998-09-24 AU AU95789/98A patent/AU763098B2/en not_active Expired
  • 1998-09-24 ES ES98949474T patent/ES2267195T3/es not_active Expired - Lifetime
  • 1998-09-24 WO PCT/US1998/019997 patent/WO2000016951A1/en active IP Right Grant
  • 1998-09-24 BR BR9816028-1A patent/BR9816028A/pt active IP Right Grant
  • 1998-09-24 EP EP98949474A patent/EP1115537B1/de not_active Revoked
  • 1998-09-24 JP JP2000573891A patent/JP2002526220A/ja active Pending
  • 1998-09-24 DE DE69835377T patent/DE69835377T2/de not_active Expired - Lifetime
• 2003
  • 2003-01-09 HK HK03100229.0A patent/HK1048086B/zh not_active IP Right Cessation

Patent Citations (3)

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events