US3436822A - Cutter head for dry shaver having additional cutting means - Google Patents

Cutter head for dry shaver having additional cutting means Download PDF

Info

Publication number
US3436822A
US3436822A US628602A US3436822DA US3436822A US 3436822 A US3436822 A US 3436822A US 628602 A US628602 A US 628602A US 3436822D A US3436822D A US 3436822DA US 3436822 A US3436822 A US 3436822A
Authority
US
United States
Prior art keywords
cutter
blade
arched
portions
blades
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US628602A
Other languages
English (en)
Inventor
Gerhard Heyek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3436822A publication Critical patent/US3436822A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/02—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers of the reciprocating-cutter type
    • B26B19/04—Cutting heads therefor; Cutters therefor; Securing equipment thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/38—Details of, or accessories for, hair clippers, or dry shavers, e.g. housings, casings, grips, guards
    • B26B19/384—Dry-shaver foils; Manufacture thereof

Definitions

  • each of said arched portions at its vertex is at least twice the rise of said arched portion.
  • the contours of said arched portions, when viewed in said cutting direction, are substantially congruent. Said arched portions are substantially coextensive with the area of contact between said blades.
  • the upper blade has an edge portion which is angled toward the concave side of the upper blade and the arched portion of the lower blade terminates short of the angled edge portion of said upper blade.
  • This invention relates to a cutter head for dry shavers, which cutter head comprises upper and lower, arched, flexible cutter blades, at least one of which is held in its arched shape by supporting forces, which act in mutually opposite directions adjacent to opposite edge portions of the blade.
  • the lower blade is resiliently urged against the upper blade and is movable relative to the latter in the cutting direction.
  • the upper blade has a large rise and the lower blade has generally a smaller radius of curvature so that the two blades can conform to each other in curvature only within a limited contact area.
  • the effective cutting area of the cutter head is also limited. Those portions of the blades which lie outside the cutting area have only a supporting function. More particularly, such portions of the blades cannot be utilized as cutting combs.
  • this object is accomplished in that the rise of the arched blades is equal to or smaller than one half of the radius of curvature of the cutter blades at the vertex of the arch, and the contours of the arched surface portions of both cutter blades, when viewed in the direction of movement of the lower blade, are almost congruent and substantially coextensive with the contact area between the cutter blades, as the upper blade is angled at its edge portion toward its concave side and the lower blade terminates or is also angled close to the angled portion of the upper blade.
  • the two cutter blades when viewed in the direction of movement of the lower blade have virtually congruently curved surface portions, which are urged into contact with each other by spring pressure so that the entire contact area can actually be used for cutting purposes. This is ensured by a relatively small curvature of the two blades so that a contact with the skin on a much larger area is ensured in the use of the dry shaver, and by the fact that at least the upper blade has an angled edge portion and the lower blade terminates or is also angled at the angled edge portion of the upper blade.
  • the upper blade is held directly in arched shape, it will be recommendable to secure the angled portions of the upper blade to a supporting frame or the like, which is secured to a removable part of the cutter head or to the shaver housing.
  • the lower blade is to be held directly in arched shape it may be provided with tie webs, which act at points that are disposed close to the edges of the arched portion.
  • the cutter head according to the invention will be of special advantage if the two cutter blades form cutting sieves as well as cutting combs.
  • Cutting combs may be formed at the edges of the arched portions of the upper and lower blades because both blades contact each other as far as to the edges of their arched portions and can perform a cutting action at said portions.
  • the perforations in the cutter blade or blades may extend across the bend line of the angled portion, so as to form a cutting comb.
  • the invention is applicable to cutter heads having a reciprocable or rotary lower blade.
  • the two cutter blades are cylindrically curved.
  • they are curved in accordance with a surface of revolution having an axis which extends through the vertex of the arch.
  • cutter heads having a rotary lower blade the same may be formed by equally angularly spaced blade sectors, which extend substantially radially and in the arched surface.
  • a desirable cutting action will be obtained within the scope of the invention if one of the two cutter blades has cutting edges extending at least approximately at right angles to the direction of movement of the lower blade, and the other cutter blade has rhombic apertures, in which the longer diagonal extends in the direction of the cutting edges of the first-mentioned blade.
  • FIGS. la to 18 show a first embodiment of the invention comprising a reciprocable lower blade.
  • FIG. 1a illustrates the essential parts of the cutter head. Parts are broken away in this figure to expose underlying parts.
  • FIG. 1b shows the upper blade
  • FIG. 1c the lower blade
  • FIG. 1d the tie web of the lower blade of FIG. la, all in the same perspective view as in FIG. 1a.
  • FIG. 12 is a transverse sectional view showing the cutter head of FIG. la.
  • FIG. 2 is a transverse sectional view similar to that of FIG. 12 and shows a modification of the first embodiment.
  • FIG. 2a illustrates a detail of this modified embodiment.
  • FIGS. 3a to 30. show a further embodiment having a rotary lower blade.
  • FIG. 3a is a partly sectional view illustrating the overall construction of the cutter head
  • FIGS. 3b and 3c correspond to FIGS. 1b and 1c, respectively.
  • FIG. 3d is a transverse sectional view showing the cutter head.
  • FIGS. 4 and 5 show modifications of the embodiment of FIG. 3.
  • FIG. 6 is a top plan view showing a portion of the two superimposed cutter blades and illustrates a preferred design of the perforations of these blades.
  • the cutter head having a reciprocating lower blade shown in FIGS. la-le comprises an upper cutter blade 1 and a lower cutter blade 2.
  • the cutter blade 1 is angled at its two opposite edges.
  • the angled edge portions 1a of the blade are formed with apertures 112, by which the blade is hooked on noses 3a, which are formed on a supporting frame 3 of the cutter head and shown in FIG. 1a.
  • the lower edges of the blade may engage in hooks 3a provided on the supporting frame 3.
  • the angled side portions in of the blade 1 are retained on the frame 3.
  • the inside width of the frame 3 is less than the width of the blade 1, the latter is slightly arched.
  • the cutter blade 1 has rhombic perforations 1c on its main surface and rhombic perforations 1d on its bent line, which are perforations only partly illustrated.
  • the lower cutter blade 2 extends only over the arched portion of the blade 1.
  • the opposite edges of the blade 2 form cutting combs 2d.
  • the main portion of the blade 2 is formed with rectangular apertures 20.
  • Hooks 2a are struck out from opposite edges of the blade 2 and engage in holes 4a, which are formed in a tie web 4 and shown in FIG. 1d.
  • the hooks 2a of the blade 2 are inserted in the holes 4a of the tie web 4
  • the blade 2 is arched.
  • the drive motor acts in usual manner on a driver 4b, which is provided on the tie web 4. This motor imparts to the lower blade 2 a reciprocating movement relative to the upper blade 1.
  • the two blades 1, 2 contact each other throughout their arched portions so that the entire contact area, which is provided with perforations 1c and 2:: throughout, can be utilized as a cutting surface.
  • the cutting combs 2d of the lower blade 2 cooperate with the perforations 1d which extend across the bend line in the upper blade 1 so that a comblike cutting action is obtained.
  • the purpose of the side cutter is for use to cut the long hair and also sideburns and the like.
  • FIG. 2 is substantially like that described with reference to FIG. 1 with the difference that the angled side portions 1a of the cutter blade 1 are not held in a frame but extend at an acute angle to inclined flange portions 13a of a head carrier 13b and are secured to the latter.
  • This arrangement improves the accessibility of the cutting combs 1d, 2d at the angled edge portions of the upper blade 1.
  • the tie web 4 of the lower blade 2 is engaged by curved leaf springs 5, the lower ends of which bear on the head carrier 13b and can roll on the same.
  • the springs 5 urge the lower blade 2 against the upper blade 1.
  • FIGS. 3a to 3d illustrate the use of the invention in a cutter head which comprises a rotary lower blade.
  • the upper cutter blade 1' provided with apertures 1c and the cutting comb I'd, as well as the lower blade 2' are arched according to a surface of revolution.
  • the upper blade 1 is angled twice at its edge and i s gripped in a ring 3, which may be provided with a flangelike projection 3'c, which embraces the angled portion 1a of the cutter blade 1' and bears on the edge of the blade so as to cause the same to arch.
  • the lower blade 2 shown in FIG. 3b has the same contour as the arched surface of the upper blade 1' but consists, e.g., of three radial sectors 2'11, 2'1), 2'0, which are equally angularly spaced.
  • the sectors Za, Zb, 2'0 form cutting combs Zd at their outer edges and are provided with hooks 2'a, which engage corresponding holes 4a of a tie web 4', as is shown in FIG. 30.
  • the tie web 4 is provided on its underside with a coupling part 4'b, which is engaged by the rotating shaft of the motor for driving the lower blade. An arched shape is enforced upon the cutter blade 2 by the engagement of the hooks Z'a with the web 4'.
  • FIG. 4 shows a modification of the embodiment of FIGS. 3a] to 3d.
  • the lower blade may consist of several sectors as in FIG. 3b or may be entirely congruent with the upper blade and is angled downwardly at its edge.
  • the angled portions Ze of the blade engage the inside of an annular flange 4", which is formed on a tie web 4. The latter is provided with a driver 4b.
  • the annular part 3' of FIG. 4 or the frame 3 of FIG. 1 may be formed directly on the shaver housing, as is shown in FIG. 5.
  • one of the blades e.g., the lower blade
  • the other blade e.g., the upper one
  • this blade is formed with continuous, oblique lands, which contribute to the stiffness of the blade.
  • the apertures 8 have a relatively large width transversely to the direction of movement of the lower knife so that the entrance of the hair is promoted.
  • the co-acting cutting edges of the two blades include an acute angle in either direction of movement so that a good shearing effect is ensured.
  • the acute angle of the rhombic holes should be at most 60 and preferably 50 or less.
  • the blades of the cutter head according to the invention must be made from a material which has a uniform strength in all directions without a direction of preferential strength, good stamping qualities and a high deformability when hardened. In view of these and other requirernents, it is recommended to use beryllium copper for the blades and to provide them with a plating of hard chromium or nickel in order to improve the edge life.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Dry Shavers And Clippers (AREA)
US628602A 1966-04-06 1967-04-05 Cutter head for dry shaver having additional cutting means Expired - Lifetime US3436822A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT329666A AT272889B (de) 1966-04-06 1966-04-06 Scherkopf für Trockenrasierapparate

Publications (1)

Publication Number Publication Date
US3436822A true US3436822A (en) 1969-04-08

Family

ID=3548355

Family Applications (1)

Application Number Title Priority Date Filing Date
US628602A Expired - Lifetime US3436822A (en) 1966-04-06 1967-04-05 Cutter head for dry shaver having additional cutting means

Country Status (5)

Country Link
US (1) US3436822A (enrdf_load_stackoverflow)
AT (1) AT272889B (enrdf_load_stackoverflow)
DE (1) DE1553717A1 (enrdf_load_stackoverflow)
GB (1) GB1184114A (enrdf_load_stackoverflow)
NL (1) NL6704922A (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3783508A (en) * 1970-08-14 1974-01-08 Gillette Co Electric shavers
US3871080A (en) * 1972-02-28 1975-03-18 Famulus Elektrogeraete Gmbh Cutter foils for dry shaving apparatus
US4144640A (en) * 1977-03-11 1979-03-20 The Gillette Company Hair clippers
US4174568A (en) * 1977-05-03 1979-11-20 U.S. Philips Corporation Shaving head for dryshaving apparatus
WO2006085086A1 (en) * 2005-02-11 2006-08-17 The Gillette Company Electric razor assembly
US20090056143A1 (en) * 2007-08-28 2009-03-05 Matsushita Electric Works, Ltd. Hair-clipper
CN106393189A (zh) * 2016-12-01 2017-02-15 王保华 一种剃须刀刀头结构
US12145284B2 (en) 2014-04-18 2024-11-19 Koninklijke Philips N.V. Blade set, hair cutting appliance, and related manufacturing method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3403761A1 (de) * 1984-02-03 1985-08-14 Kurt 7230 Schramberg Bäuerle Trockenrasierer
AT400690B (de) * 1992-11-25 1996-02-26 Philips Electronics Nv Rasiergerät mit einem folienartigen obermesser und einem folienartigen untermesser

Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2141582A (en) * 1936-02-15 1938-12-27 Wimberger Kommanditgesellschaf Cutting machine such as a safety razor
US2184757A (en) * 1937-10-30 1939-12-26 Samotey John Shaving device
GB535804A (en) * 1939-12-22 1941-04-22 Wilkinson Sword Co Ltd Improvements in or relating to mechanical shavers and hair cutters
US2263155A (en) * 1938-04-02 1941-11-18 Chicago Flexible Shaft Co Shaving implement
US2802261A (en) * 1954-02-26 1957-08-13 Heyek Gerhard Dry-shaving apparatus with a flexible shear plate
US2833033A (en) * 1953-12-17 1958-05-06 Heyek Gerhard Sheet metal lower blade for the cutter head of dry shaving apparatus
DE1077568B (de) * 1958-03-18 1960-03-10 Siemens Elektrogeraete Gmbh Trockenrasiergeraet
US2959854A (en) * 1955-09-21 1960-11-15 Wahl Clipper Corp Cutter head for dry shaver
FR1253196A (fr) * 1960-04-07 1961-02-03 Pakard Tête de rasoir électrique avec élément coupant flexible
US2975516A (en) * 1957-07-12 1961-03-21 Heyek Gerhard Dry shaver head construction for cutting long and short hair
US3052022A (en) * 1959-12-03 1962-09-04 Wahl Clipper Corp Mounting structure for shaver blade
US3144714A (en) * 1961-12-04 1964-08-18 Philips Corp Cutting head for dry shaver
US3178818A (en) * 1962-06-01 1965-04-20 Payer Lux Inner cutter for a dry shaver fixed to blade carrier by collars and an undetachable coating
US3201178A (en) * 1963-08-21 1965-08-17 Matsushita Electric Works Ltd Electric dry shaver head having trimmer edge
US3213535A (en) * 1961-05-31 1965-10-26 Carinthia Elektrogerate Ges M Dry shaver head construction for cutting long and short hair
US3269008A (en) * 1962-07-24 1966-08-30 Braun Ag Shaving apparatus head
US3343258A (en) * 1965-06-15 1967-09-26 Carinthia Elektrogerate Ges M Dry shaver with elastically deformable cutter foil

Patent Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2141582A (en) * 1936-02-15 1938-12-27 Wimberger Kommanditgesellschaf Cutting machine such as a safety razor
US2184757A (en) * 1937-10-30 1939-12-26 Samotey John Shaving device
US2263155A (en) * 1938-04-02 1941-11-18 Chicago Flexible Shaft Co Shaving implement
GB535804A (en) * 1939-12-22 1941-04-22 Wilkinson Sword Co Ltd Improvements in or relating to mechanical shavers and hair cutters
US2833033A (en) * 1953-12-17 1958-05-06 Heyek Gerhard Sheet metal lower blade for the cutter head of dry shaving apparatus
US2802261A (en) * 1954-02-26 1957-08-13 Heyek Gerhard Dry-shaving apparatus with a flexible shear plate
US2959854A (en) * 1955-09-21 1960-11-15 Wahl Clipper Corp Cutter head for dry shaver
US2975516A (en) * 1957-07-12 1961-03-21 Heyek Gerhard Dry shaver head construction for cutting long and short hair
DE1077568B (de) * 1958-03-18 1960-03-10 Siemens Elektrogeraete Gmbh Trockenrasiergeraet
US3052022A (en) * 1959-12-03 1962-09-04 Wahl Clipper Corp Mounting structure for shaver blade
FR1253196A (fr) * 1960-04-07 1961-02-03 Pakard Tête de rasoir électrique avec élément coupant flexible
US3213535A (en) * 1961-05-31 1965-10-26 Carinthia Elektrogerate Ges M Dry shaver head construction for cutting long and short hair
US3144714A (en) * 1961-12-04 1964-08-18 Philips Corp Cutting head for dry shaver
US3178818A (en) * 1962-06-01 1965-04-20 Payer Lux Inner cutter for a dry shaver fixed to blade carrier by collars and an undetachable coating
US3269008A (en) * 1962-07-24 1966-08-30 Braun Ag Shaving apparatus head
US3201178A (en) * 1963-08-21 1965-08-17 Matsushita Electric Works Ltd Electric dry shaver head having trimmer edge
US3343258A (en) * 1965-06-15 1967-09-26 Carinthia Elektrogerate Ges M Dry shaver with elastically deformable cutter foil

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3783508A (en) * 1970-08-14 1974-01-08 Gillette Co Electric shavers
US3871080A (en) * 1972-02-28 1975-03-18 Famulus Elektrogeraete Gmbh Cutter foils for dry shaving apparatus
US4144640A (en) * 1977-03-11 1979-03-20 The Gillette Company Hair clippers
US4174568A (en) * 1977-05-03 1979-11-20 U.S. Philips Corporation Shaving head for dryshaving apparatus
RU2366566C2 (ru) * 2005-02-11 2009-09-10 Дзе Жиллетт Компани Узел электрической бритвы
US20090100680A1 (en) * 2005-02-11 2009-04-23 The Gillette Company Electric razor assembly
KR100899068B1 (ko) * 2005-02-11 2009-05-25 더 질레트 컴퍼니 전기 면도기 조립체
WO2006085086A1 (en) * 2005-02-11 2006-08-17 The Gillette Company Electric razor assembly
AU2006212006B2 (en) * 2005-02-11 2010-09-23 The Gillette Company Electric razor assembly
US8065801B2 (en) 2005-02-11 2011-11-29 The Procter & Gamble Company Electric razor assembly
US20090056143A1 (en) * 2007-08-28 2009-03-05 Matsushita Electric Works, Ltd. Hair-clipper
RU2385800C1 (ru) * 2007-08-28 2010-04-10 Панасоник Электрик Воркс Ко , Лтд. Машинка для стрижки волос
US8713802B2 (en) 2007-08-28 2014-05-06 Panasonic Corporation Hair-clipper
US12145284B2 (en) 2014-04-18 2024-11-19 Koninklijke Philips N.V. Blade set, hair cutting appliance, and related manufacturing method
CN106393189A (zh) * 2016-12-01 2017-02-15 王保华 一种剃须刀刀头结构
CN106393189B (zh) * 2016-12-01 2019-07-23 王保华 一种剃须刀刀头结构

Also Published As

Publication number Publication date
NL6704922A (enrdf_load_stackoverflow) 1967-10-09
AT272889B (de) 1969-07-25
GB1184114A (en) 1970-03-11
DE1553717A1 (de) 1971-06-03

Similar Documents

Publication Publication Date Title
US5669138A (en) Shaving head for electric razors
JP3860297B2 (ja) 髪の毛を切るためのバリカン
US2182067A (en) Process of manufacturing a shaving tool
US3436822A (en) Cutter head for dry shaver having additional cutting means
US2562104A (en) Cutting head for dry shaving razors
US2331500A (en) Mechanical razor
NL8004471A (nl) Scheerbladsamenstel voor een elektrisch scheerapparaat van het rotatietype.
US2975516A (en) Dry shaver head construction for cutting long and short hair
US3092904A (en) Movable cutter for a dry shaver having saw tooth design cutting edge
US4589205A (en) Inner cutter for electric shavers
US3119180A (en) Shear plate and cutter assembly for rotary-type dry shaver
EP1566247A1 (en) An electric shaver
US2297915A (en) Electric razor
US4089109A (en) Cutter head assembly
US2336638A (en) Electric razor
US3060572A (en) Cutting head for a dry shaver
US4536956A (en) Reciprocatingly drivable cutter for a dry-shaving apparatus
US3060569A (en) Cutter blade assembly for a motor driven dry shaver
US2337623A (en) Electric dry shaver
US2701414A (en) Dry shaving device
US2319916A (en) Electric razor
US2314264A (en) Shaving apparatus
US2817145A (en) Shear plate for dry shavers
US2182066A (en) Electric shaver and shearing blade therefor
US2237869A (en) Electric razor