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US2494464A - Rotary dry shaver - Google Patents

Rotary dry shaver Download PDF

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Publication number
US2494464A
US2494464A US667392A US66739246A US2494464A US 2494464 A US2494464 A US 2494464A US 667392 A US667392 A US 667392A US 66739246 A US66739246 A US 66739246A US 2494464 A US2494464 A US 2494464A
Authority
US
United States
Prior art keywords
cutting
plate
cutting plate
running surface
annular
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
US667392A
Other languages
English (en)
Inventor
Vivie Wilhelmus Lamb Leonardus
Lee Albertus Van De
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.)
Hartford National Bank and Trust Co
Original Assignee
Hartford National Bank and Trust Co
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 Hartford National Bank and Trust Co filed Critical Hartford National Bank and Trust Co
Application granted granted Critical
Publication of US2494464A publication Critical patent/US2494464A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B26B19/14—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers of the rotary-cutter type; Cutting heads therefor; Cutters therefor
    • B26B19/143—Details of outer cutters

Definitions

  • This invention relates to a cutting plate for dry-shaving apparatus having a rotary cutting member, which cutting plate possesses an annular and apertured running surface for the cutting member which surface is supported both at the inner and outer edges. It is known in the dry shaver art that in shaving by means of dryshaving apparatus the hairs are cut more rapidly and shorter as the cutting plate is made thinner at the running surface of the cutting member. Although very small thicknesses of the material have been proposed theoretically for this purpose it has been found in practice that a deiinite limit cannot be exceeded in conjunction with reasonable conditions as regards solidity, life and For this reason the thickness of the cutting plate at the running surface amounts it about 0.08 mm. in commercial apparatus of the above-mentioned kind of shaving apparatus. The invention is based on the realisation that in satisfying the above-mentioned conditions the cutting plate may be made thinner locally if on the other hand strengthenings are provided at other points.
  • the inner edge of the running surface of a cutting plate which has an annular apertured running surface for a rotary cutting member which surface is supported both at the inner and at the outer edges, is thinner than the outer edge.
  • An object of the invention is to make the annular running surface for the cutting member at the inner edge thinner and at the outer edge thicker than it has hitherto been customary in practice with such cutting plates. Since the running surface of these cutting plates generally bears at the outer edge on the housing of the shaving apparatus, and the support at the inner edge is constituted by a member of the cutting plate itself solely providing for the initial relation, for instance a plate-shaped or a cup-shaped part of the cutting plate with or without a bottom, a sufficiently solid construction of the cutting plate for permitting an inner part of the running surface which is thinner than normal is obtained by making use of the outer part of the running surface which is thicker than normal.
  • the hairs may be cut shorter and more rapidly than by means of a conventional cutting plate of this type.
  • the thicker outer edge of the running surface acts as a rough shaving device, by which the hairs are cut somewhat shorter than by means of a normal cutting plate.
  • this constitutes by no means a drawback, since it has been found in practice that when using the usual cutting plate having the same thickness throughout the hairs are not directly cut to a minimum length but stepwise to a smaller length in each instance.
  • the cutting plate of the present disclosure is preferably realized in such manner that the thickness of the running surface gradually varies from the outside to the inner side in a radial direction. Furthermore the invention is more partiularly of importance for4 the kind of cutting plate which is already known and in which the apertures of the running surface consists of slits extending from the inner to the outer edge. In this construction the material between the slits forms dams that are supported at both sides, it is true, but these dams are readily liable to sagging owing to their comparatively great length. When making use of the invention this drawback is avoided.
  • a suitable practical construction of the cutting plate according to the invention is obtained by giving the thickness of the running surface at the inner edge a value of less than about 0.08 mm. for instance 0.06 mm. and at the outer edge a value of more than 0.08 mm., for instance 0.11 mm.
  • Figure 1 represents half a section of a cutting plate according to the invention and a cutting member cooperating therewith, Figure 2 being a bottom view of this cutting plate.
  • Figure 3 is a side view in sectional elevation of the annular cutting plate showing a stepwise variation of the axial thickness of the said plate.
  • Figure 4 is still another side view in sectional elevation of the cutting plate showing a constant axial thicknes'sat one annular portion of the said plate and, aj'comparatively rapidly decreasing thickness at another annular portion of the said plate.
  • Figure 5 is a further side view in sectional elevation of the cutting plate showing a gradual radial increase in thickness' of the said plate.
  • Figure 6 is an additional-side view in sectional elevation of the cutting plate, with a flat top surface showing a decrease in'thickness of the said plate at the inner side of the cutting head.
  • a cup-shaped cutting plate l is furnished with a central recess 2 and a number of slits 3 which, as isA shown in Fig. 2, ⁇ extend radiallir (3') or substantially radially ⁇ (3"), but generally from the central excavation to the outer edge.
  • slits or apertures preferably open' in the central recess and in the outer wall of the "cutting plate.
  • annular running surface 4 for a rotary cutting member 5.
  • the running surface i is supported at the outer side by the cylindrical outer wall and at the inner side bythe wall of the central recess which yields the required stiffness.
  • the thickness of the running surface at the inner edge 6 is smaller than at the outer edgev 'l in such manner that the thickness of the material at 6 is smaller and at greater than the normal thickness which is deemed admissible in the caseof a cutting plate having the same thickness throughout the active running surface.
  • use is made of a gradually varying thickness. l
  • Figures 3 to 6 representstill other forms of construction.
  • the decrease in thickness takes placeV stepwise.
  • Figure 4 shows from the outside to the inner side at first a constant thickness followed by a .comparatively rapidly decreasing thickness and then a constant thickness again.
  • Figure 5 use ismade of a gradual decrease in thickness atboth sides of the cutting plate and in Figure 6 solely a decrease in thickness Aof the'running surface has taken place at the inner side of the cutting head.
  • Dry shaving apparatus comprising an annular cup-shaped cutting plate'oand a rotary cut'- ting member, said platephaving an apertured annular running surface for the said member, said plate being ⁇ axially', thinner at the inner portion of the said running surface than at the outer portion of the said surface.
  • Dry shaving apparatus comprising an annular cup-shaped cutting plate with a central recess and arotary cutting finer-uber, said plate having an apertured. .annular running surface for the said member, said plate axially decreasing in thickness in a uniform manner from the outside portion of the said surface to the inside portion of the said surface.
  • Dry shaving'apparatus comprising an annular cup-shaped cutting plate and a rotary cutting member, said plate having an apertured annular running ysurface for the said member, said plate axially decreasing in thickness in a stepwise manner from the outside edge of the said surface to the inside edge of the said surface.
  • Dryshaving apparatus comprising an annular cup-shaped ⁇ cutting plate with a central recess and a rotary cutting member, said plate having a radially apertured annular running surface for the saidmember, said plate axially varying in thicknessfrom the inside edge of the said surface to the outside edge of the ,saidsurface.
  • Dry shaving apparatus comprising an annular cup-shaped cutting plate with a central recess and a rotary cutting member, said plate having an annular running surface with substantially radial aperturesy for the said member, said plate being axially thicker at one annular portion of the said runningv surface than at another annular portion.
  • Dry shaving apparatus comprising an annular cup-shaped cutting plate with a central recess and a rotary cutting mem-ber, said vplate having an apertured annular. running surface for the said member, Vsaid plate vbeing axially thicker at the outside edge of the running surface than at the inside edge of thesaid. surface, the said cutting member beinggsupported at the edges of the said surface.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling Processes (AREA)
  • Confectionery (AREA)
  • Dry Shavers And Clippers (AREA)
US667392A 1942-01-13 1946-05-04 Rotary dry shaver Expired - Lifetime US2494464A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL657037X 1942-01-13

Publications (1)

Publication Number Publication Date
US2494464A true US2494464A (en) 1950-01-10

Family

ID=19795263

Family Applications (1)

Application Number Title Priority Date Filing Date
US667392A Expired - Lifetime US2494464A (en) 1942-01-13 1946-05-04 Rotary dry shaver

Country Status (5)

Country Link
US (1) US2494464A (de)
DE (1) DE872753C (de)
FR (1) FR889779A (de)
GB (1) GB657037A (de)
NL (1) NL59158C (de)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1035012B (de) * 1954-11-27 1958-07-24 Kurt Baeuerle Scherkopf fuer Trockenrasiergeraet
US3019525A (en) * 1960-06-29 1962-02-06 Bruecker John Shear plate and cutter assembly for rotary type dry shaver
US3125808A (en) * 1959-05-19 1964-03-24 Head construction for a dry shaver
US3264733A (en) * 1964-07-17 1966-08-09 Philips Corp Dry-shaving apparatus having a shaving head which is partly constructed for use as a hair-clipper
US3279056A (en) * 1964-10-28 1966-10-18 Andis Clipper Co Double-edge combination dry shaver and finishing hair clipper with adjustable head
US3281937A (en) * 1962-04-16 1966-11-01 Philips Corp Shaving head shear plate with various depths of apertures therein
US3292251A (en) * 1963-07-26 1966-12-20 North American Phillips Compan Slotted shear plate for electric shavers
US4729169A (en) * 1985-03-29 1988-03-08 Izumi Seimitsu Kogyo Kabushiki Kaisha Inner rotary cutters for electric shavers and manufacturing processes for the same
US5019036A (en) * 1989-11-28 1991-05-28 Stahl Norman O Method and apparatus for removing gelatinous tissue
US5867908A (en) * 1996-05-31 1999-02-09 U.S. Philips Corporation Shaving apparatus
US6085421A (en) * 1998-03-27 2000-07-11 U.S. Philips Corporation Shaving apparatus
US6199282B1 (en) * 1997-06-17 2001-03-13 Izuma Products Company Electric shaver
US20060156548A1 (en) * 2005-01-19 2006-07-20 Izumi Products Company Rotary type electric shaver
US20090025228A1 (en) * 2004-11-01 2009-01-29 Koninklijke Philips Electronics N.V. Inner cutter with cutter blades at different radii, method for manufacturing such unit, shaver head and rotary shaver provided therewith
CN104511920A (zh) * 2013-10-01 2015-04-15 皇家飞利浦有限公司 刀片组和剪发器具
US20160229071A1 (en) * 2013-10-01 2016-08-11 Koninklijke Philips N.V. Blade set and hair cutting appliance
US9956697B2 (en) 2013-07-25 2018-05-01 Koninklijke Philips N.V. Personal care device as well as a cutting unit for such a personal care device
US20180361600A1 (en) * 2010-11-08 2018-12-20 Izumi Products Company Rotary electric shaver

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3753690A1 (de) 2019-06-21 2020-12-23 Koninklijke Philips N.V. Schutzelement zur verwendung in einer haarschneideeinheit

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2253016A (en) * 1938-05-18 1941-08-19 Knapp Monarch Co Rotary shearing head
US2269875A (en) * 1938-05-10 1942-01-13 Huntington Howard Power driven razor
US2277328A (en) * 1940-03-11 1942-03-24 Ferdinand L Kamholz Electric razor
US2283834A (en) * 1938-11-10 1942-05-19 Hartford Nat Bank & Trust Co Hair-cutting device
US2284038A (en) * 1940-02-02 1942-05-26 Bruecker John Shaving implement

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2269875A (en) * 1938-05-10 1942-01-13 Huntington Howard Power driven razor
US2253016A (en) * 1938-05-18 1941-08-19 Knapp Monarch Co Rotary shearing head
US2283834A (en) * 1938-11-10 1942-05-19 Hartford Nat Bank & Trust Co Hair-cutting device
US2284038A (en) * 1940-02-02 1942-05-26 Bruecker John Shaving implement
US2277328A (en) * 1940-03-11 1942-03-24 Ferdinand L Kamholz Electric razor

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1035012B (de) * 1954-11-27 1958-07-24 Kurt Baeuerle Scherkopf fuer Trockenrasiergeraet
US3125808A (en) * 1959-05-19 1964-03-24 Head construction for a dry shaver
US3019525A (en) * 1960-06-29 1962-02-06 Bruecker John Shear plate and cutter assembly for rotary type dry shaver
US3281937A (en) * 1962-04-16 1966-11-01 Philips Corp Shaving head shear plate with various depths of apertures therein
US3292251A (en) * 1963-07-26 1966-12-20 North American Phillips Compan Slotted shear plate for electric shavers
US3264733A (en) * 1964-07-17 1966-08-09 Philips Corp Dry-shaving apparatus having a shaving head which is partly constructed for use as a hair-clipper
US3279056A (en) * 1964-10-28 1966-10-18 Andis Clipper Co Double-edge combination dry shaver and finishing hair clipper with adjustable head
US4729169A (en) * 1985-03-29 1988-03-08 Izumi Seimitsu Kogyo Kabushiki Kaisha Inner rotary cutters for electric shavers and manufacturing processes for the same
US4784022A (en) * 1985-03-29 1988-11-15 Izumi Seimitsu Kogyo Kabushiki Kaisha Inner rotary cutters for electric shavers and manufacturing processes for the same
US5019036A (en) * 1989-11-28 1991-05-28 Stahl Norman O Method and apparatus for removing gelatinous tissue
US5867908A (en) * 1996-05-31 1999-02-09 U.S. Philips Corporation Shaving apparatus
US6199282B1 (en) * 1997-06-17 2001-03-13 Izuma Products Company Electric shaver
US6085421A (en) * 1998-03-27 2000-07-11 U.S. Philips Corporation Shaving apparatus
US20090025228A1 (en) * 2004-11-01 2009-01-29 Koninklijke Philips Electronics N.V. Inner cutter with cutter blades at different radii, method for manufacturing such unit, shaver head and rotary shaver provided therewith
US8245404B2 (en) * 2004-11-01 2012-08-21 Koninklijke Philips Electronics N.A. Inner cutter with cutter blades at different radii, method for manufacturing such unit, shaver head and rotary shaver provided therewith
US20060156548A1 (en) * 2005-01-19 2006-07-20 Izumi Products Company Rotary type electric shaver
US7509741B2 (en) * 2005-01-19 2009-03-31 Izumi Products Company Rotary type electric shaver
US20180361600A1 (en) * 2010-11-08 2018-12-20 Izumi Products Company Rotary electric shaver
US9956697B2 (en) 2013-07-25 2018-05-01 Koninklijke Philips N.V. Personal care device as well as a cutting unit for such a personal care device
US20160229071A1 (en) * 2013-10-01 2016-08-11 Koninklijke Philips N.V. Blade set and hair cutting appliance
US9782903B2 (en) * 2013-10-01 2017-10-10 Koninklijke Philips N.V. Blade set and hair cutting appliance
US9789617B2 (en) * 2013-10-01 2017-10-17 Koninklijke Phillips N.V. Blade set and hair cutting appliance
US20160236361A1 (en) * 2013-10-01 2016-08-18 Koninklijke Philips N.V. Blade set and hair cutting appliance
CN104511920B (zh) * 2013-10-01 2018-07-06 皇家飞利浦有限公司 固定刀片、刀片组和剪发器具
CN104511920A (zh) * 2013-10-01 2015-04-15 皇家飞利浦有限公司 刀片组和剪发器具

Also Published As

Publication number Publication date
NL59158C (de) 1900-01-01
FR889779A (fr) 1944-01-19
GB657037A (en) 1951-09-12
DE872753C (de) 1953-04-02

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