US3261091A - Shaving head having concentric cutter elements - Google Patents

Shaving head having concentric cutter elements Download PDF

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Publication number
US3261091A
US3261091A US38461364A US3261091A US 3261091 A US3261091 A US 3261091A US 38461364 A US38461364 A US 38461364A US 3261091 A US3261091 A US 3261091A
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Prior art keywords
cutter
grooves
shear plate
support
shaving head
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Expired - Lifetime
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Driest Jan Van Den
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US Philips Corp
North American Philips Co Inc
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US Philips Corp
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26BHAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B19/00Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/14Clippers 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
    • B26B19/141Details of inner cutters having their axes of rotation perpendicular to the cutting surface
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26BHAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B19/00Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/14Clippers 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
    • B26B19/143Details of outer cutters

Description

July 19, 1966 J. VAN DEN DRIEST 3,261,091
SHAVING HEAD HAVING CONGENTRIC CUTTER ELEMENTS Filed July 25, 1964 Inn INVENTOR.
JAN VAN DEN DRIEST AGENT United States Patent C) 3,261,091 SHAVING HEAD HAVING CONCENTRIC CUTTER ELEMENTS Jan van den Driest, Drachten, Netherlands, assignor to North American Philips Company, Inc., New York, N .Y., a corporation of Delaware Filed July 23, 1964, Ser. No. 384,613 Claims priority, application Netherlands, Aug. 20, 1963, 296,894 3 Claims. (Cl. 30-43;.6)
The invention relates to a shaving head for use in a dry shaving apparatus comprising a round shear plate having concentric running grooves for the cutting members in a single plate, co-operating with a cutting head provided with concentric cutter rims united to form an integral part on a single support.
Such constructions have rarely been employed in practice or they have not been used at all, since it did not appear to be possible to obtain such a co-operation between the races and the cutting members to be produced in series without excessive cost that, when the shaving head is pressed against the skin a uniform shaving effect is obtained.
The invention has for its object to provide an improvement in this respect and is characterized in that the thickness of the upright edges of the plate, bounding the laminations, measured along a radial line through said edges, is more than twice the length of the laminations between said edges, while the cutter rims are centered with respect to the plate by direct guiding of the cutter support along an annular face which is located on the inner side with respect to the outer side of the inner cutter rim.
Consequently, in accordance with the invention there is provided a comparatively great thickness of material in a radial sectional area of the portion of the plate where the running grooves are provided, as compared with the width of said running grooves. With a given diameter of the plate the surface of the shaving operation is smaller than is theoretically possible, but the active shaving surface is nevertheless sufiiciently enlarged in this way to justify the complication involved in providing concentric running grooves and concentric cutter rims. In actual manufacture, however, the advantage is obtained that a very small thickness of laminations is permitted with the said ratio between the thickness of the material and the length of the lamination parts bridging the running grooves while the rigidity remains sufficient. Moreover, the upper surface of the plate, as a whole, maintains such a rigidity that the guide of the cutter-rim support, as stated above, can be provided in the inner part of the plate. This provides a simple and accurate guide along an annular path of small diameter, which is of great importance for such a choice of the width of the cutting edges of the cutters with respect to the width of the running grooves that a small clearance will be sufficient, which is conducive to the active shaving surface.
In this case an accurate arrangement of the cutter rims relative to each other and to the axis of rotation is very important and in an advantageous embodiment this is achieved in that the inner cutter rim is welded in the form of a central ring to the bottom of the cup-shaped body of the outer cutter rim while the inner side of the inner cutter rim is guided along the corresponding side of the associated running groove.
In a further embodiment suitable for this purpose a known technique is applied in which separate cutters are arranged in a rim around the axis of rotation of the cutter head formed by a pressure-cast piece and fixed separately in the bottom part thereof, while the cutting edges are located on the head side of the cutter head.
The known cutter heads of this type have a fairly complicated shape, the cutters having for example the form 3251,91 Patented July 19, lgfifi of a T, the long limb of which extends through an opening in the cast piece in downward direction, where it is fixed by separate clamping members, the cutter being at the same time urged laterally against a supporting face.
In accordance with the present invention this construction is such that the walls of the radial grooves are in direct contact with the lower parts of the cutters, the lower edges of which bear throughout their length on the bottom of the groove, while the cast piece supports, in addition, a central, upwardly extending centering pin which fits in a central bore of a shear plate to be arranged over the cutter head.
In this Way the cutters can be rigidly fixed during pressing or casting of the cutter head, while they are held throughout their length both on the two sides and at the lower edges, whereas the ends of the grooves can be left completely open and no downwardly projecting extension is required for fixing the cutters by separate members and to prevent a displacement in the longitudinal direction. In order to allow suitable tolerances in the disposition in the radial direction, for an inexpensive manufacture, without the need for grinding the end edges of the cutters to measure, the centering pin can be formed together with the casting and be directly provided in the central bore of the shear plate. Thus a radial movement of the cutters in the running groove of the shear plate is prevented and a small clearance in the running groove will suflice.
The cut hairs can be readily conducted away to the hair chamber in an advantageous embodiment which is characterized in that the radial grooves are provided in limbs projecting radially from the casting, the upper edges of said limbs extending over part of the bottom surface being bevelled in upward direction towards the grooves.
The invention will now be described with reference to the drawing, while various advantageous aspects thereof will be set forth.
FIG. 1 shows a first embodiment in a vertical sectional view through the axis.
FIG. 2 shows perspectively in a half sectional view a shear plate in a second embodiment and FIG. 3 also shows perspectively the support for the cutter rims, while a cutter removed from the support is shown separately.
Referring to FIG. 1, reference numeral 1 designates the shear plate and 2 designates the support of the cutter rims. It is shown that on the bottom 3 of said support, which has the shape of a cup or dish and with which the outer cutter rim 4 is integral, there is welded a central ring 5, which holds the inner cutter rim 6. The inner side 7 of the cutter rim 6 is guided along the inner side 8 of the corresponding running groove 9.
Viewing a portion of the cutting head indicated by the arrow P, going through the ends of the cutters and the boundaries of the running grooves, it will be apparent that there is supporting material on either side of the laminated parts 10 which bridge the running grooves. The overall width of the two running grooves in a practical embodiment is 3 mms. and the length of the part P is about 8 mms.
In the embodiment shown in FIGS. 2 and 3 the laminated shear plate 11 has two concentric running grooves 12 and 13, in each of which a cutter rim is adapted to rotate.
The two rows of cutter rims are obtained (see FIG. 3) by fixing a series of cutter plates 14 in a cutter head support 15, each cutter plate having the shape of a U, the ends of the legs 17 and 18 form the cutting edges, while the ridge or the web 16 is fixed in one of the grooves 19 in support 15.
The upwardly projecting centering pin 21, which is integral with the bottom of the cutter head, is journalled, after mounting, in the central bore 22 of a bearing sleeve 3 23, the latter being housed in the central opening shear plate 11.
The radial grooves 19 are provided in legs radially projecting from the support 15, said legs bearing the reference numeral 24; the upper sides 25 of said legs are projected over a given distance above the top surface 20 of the support 15. On either side of the cutter these sides are bevelled in upward direction, so that the sloping faces 26 and 27 are formed. The cut hairs can therefore be readily conducted away between the legs 24 towards the hair chamber below the support 15.
From the cutter shown separately in FIG. 3 it will be seen that the Web 16 of each cutter is provided with openings 28 and 29 so that in the pressure or spray casting process for the cutter head support 15 a material connection is obtained between the sides of the grooves across said openings. The manufacture may be carried out by means of an extrusion process and the casting may consist of so-called sprayed aluminum. The central pin 21 may be made of steel and may be cast at the same time of a sleeve of steel or brass which may he slipped onto an aluminum pin which is integral with the support 15.
In FIG. 3, the broken lines indicate in the separate outter 16 that the legs of the U-shaped cutter may be bent over to one side, so that a sharp cutting angle is obtained after horizontal grinding.
What is claimed is:
1. A shaving head for use in a dry shaver comprising an inverted cup-shaped, apertured shear plate having conof the centric annular grooves therein and a central bore, a 30 rotary cutter support having at least two concentric rings of cutter blades, each of said blades being rotatable in the grooves of said shear plate adjacent to said apertures, the thickness of the lateral walls of the shear plate surrounding said grooves being more than twice the thickness of the portions of the shear plate directly above said grooves, said rotary cutter support being provided with an upwardly projecting centering pin fitted in said central bore, and a plurality of additional grooves extending radially from said rotary cutter support and each adapted to have secured therein at least one of said cutter blades.
2. A shaving head for use with a dry shaver as claimed in claim 1 wherein said cutter blades are U-shaped, with the ends of said legs forming the cutting surfaces.
3. A shaving head for use with a dry shaver as claimed in claim 1 further comprising bevelled side portions adjacent to each of said additional grooves for permitting the cut hair which accumulates thereon to further fall by gravity away from said rotary cutter support.
References Cited by the Examiner UNITED STATES PATENTS 2,119,021 5/1938 Moskovics et a1 30--41.5 2,220,800 11/1940 Jepson 30-354 X 2,238,278 4/1941 Moskovics et al. 30354 X 2,282,539 5/1942 Bahr 3043.6 2,575,741 11/1951 Abrams et al 3034.1 2,616,168 11/1952 Dankers 3043.6 2,632,948 3/1953 Konrad 30-43.6
FOREIGN PATENTS 1,088,648 9/ 1954 France. 571,355 1/1958 Italy.
' WILLIAM FELDMAN, Primary Examiner.
MYRON C. KRUSE, Examiner.

Claims (1)

1. A SHAVING HEAD FOR USE IN A DRY SHAVER COMPRISING AN INVERTED CUP-SHAPED, APERTURED SHEAR PLATE HAVING CONCENTRIC ANNULAR GROOVES THEREIN AND A CENTRAL BORE, A ROTARY CUTTER SUPPORT HAVING AT LEAST TWO CONCENTRIC RINGS OF CUTTER BLADES, EACH OF SAID BLADES BEING ROTATABLE IN THE GROOVES OF SAID SHEAR PLATE ADJACENT TO SAID APERTURES, THE THICKNESS OF THE LATERAL WALLS OF THE SHEAR PLATE SURROUNDING SAID GROOVES BEING MORE THAN TWICE THE THICKNESS OF THE PORTIONS OF THE SHEAR PLATE DIRECTLY ABOVE SAID GROOVES, SAID ROTARY CUTTER SUPPORT BEING PROVIDED WITH
US38461364 1963-08-20 1964-07-23 Shaving head having concentric cutter elements Expired - Lifetime US3261091A (en)

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NL296894 1963-08-20

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US (1) US3261091A (en)
BE (1) BE651972A (en)
CH (1) CH439008A (en)
DE (1) DE1285917B (en)
ES (1) ES303268A1 (en)
FR (1) FR1406225A (en)
GB (1) GB1075899A (en)
NL (1) NL296894A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4393586A (en) * 1979-08-07 1983-07-19 Matsushita Electric Works, Ltd. Shaving blade assembly for rotary type electric shaver
US5390416A (en) * 1992-04-17 1995-02-21 Izumi Products Company Electric razor
US5408749A (en) * 1993-02-12 1995-04-25 Izumi Products Company Electric razor
US5427001A (en) * 1993-09-15 1995-06-27 Izumi Products Company Method and apparatus for making external cutting member of an electric razor
EP1354676A1 (en) * 2002-04-18 2003-10-22 Izumi Products Company An inner cutter unit for an electric rotary shaver
US20040078985A1 (en) * 2002-09-09 2004-04-29 Jingjing Chen Multi-functional cutting unit
US20100175258A1 (en) * 2007-06-13 2010-07-15 Koninklijke Philips Electronics N.V. Shaving apparatus, a cutting unit and a shaving head
US20150040403A1 (en) * 2012-01-10 2015-02-12 Koninklijke Philips N.V. Rotary shaving unit
US20150343652A1 (en) * 2014-05-30 2015-12-03 Izumi Products Company Rotary electric shaver
WO2016184693A1 (en) * 2015-05-21 2016-11-24 Koninklijke Philips N.V. Improved cutting unit and shaving head of a shaving device
US20170144317A1 (en) * 2015-11-24 2017-05-25 Izumi Products Company Rotary electric shaver and method of manufacturing inner blade of rotary electric shaver

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5329702A (en) * 1992-04-17 1994-07-19 Izumi Products Company Electric razor

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2119021A (en) * 1938-01-15 1938-05-31 Frederick E Moskovies Shaving apparatus
US2220800A (en) * 1938-05-21 1940-11-05 Chicago Flexible Shaft Co Shaving implement
US2238278A (en) * 1938-05-28 1941-04-15 Eleanor U Andrews Shaving device
US2282539A (en) * 1938-08-25 1942-05-12 Casco Products Corp Shaving machine
US2575741A (en) * 1945-08-14 1951-11-20 Eleanor U Andrews Shaving apparatus
US2616168A (en) * 1942-03-18 1952-11-04 Hartford Nat Bank & Trust Co Cutting head for dry shavers
US2632948A (en) * 1948-12-06 1953-03-31 Konrad Hermann Mechanical razor
FR1088648A (en) * 1953-09-10 1955-03-09 Electric razor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE454271A (en) * 1943-02-05

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2119021A (en) * 1938-01-15 1938-05-31 Frederick E Moskovies Shaving apparatus
US2220800A (en) * 1938-05-21 1940-11-05 Chicago Flexible Shaft Co Shaving implement
US2238278A (en) * 1938-05-28 1941-04-15 Eleanor U Andrews Shaving device
US2282539A (en) * 1938-08-25 1942-05-12 Casco Products Corp Shaving machine
US2616168A (en) * 1942-03-18 1952-11-04 Hartford Nat Bank & Trust Co Cutting head for dry shavers
US2575741A (en) * 1945-08-14 1951-11-20 Eleanor U Andrews Shaving apparatus
US2632948A (en) * 1948-12-06 1953-03-31 Konrad Hermann Mechanical razor
FR1088648A (en) * 1953-09-10 1955-03-09 Electric razor

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4393586A (en) * 1979-08-07 1983-07-19 Matsushita Electric Works, Ltd. Shaving blade assembly for rotary type electric shaver
US5390416A (en) * 1992-04-17 1995-02-21 Izumi Products Company Electric razor
US5408749A (en) * 1993-02-12 1995-04-25 Izumi Products Company Electric razor
US5427001A (en) * 1993-09-15 1995-06-27 Izumi Products Company Method and apparatus for making external cutting member of an electric razor
EP1354676A1 (en) * 2002-04-18 2003-10-22 Izumi Products Company An inner cutter unit for an electric rotary shaver
US6952879B2 (en) 2002-04-18 2005-10-11 Izumi Products Company Inner cutter unit for an electric rotary shaver
US20040078985A1 (en) * 2002-09-09 2004-04-29 Jingjing Chen Multi-functional cutting unit
US20100175258A1 (en) * 2007-06-13 2010-07-15 Koninklijke Philips Electronics N.V. Shaving apparatus, a cutting unit and a shaving head
US9821478B2 (en) * 2007-06-13 2017-11-21 Koninklijke Philips N.V. Shaving apparatus, a cutting unit, and a shaving head
US10850409B2 (en) 2007-06-13 2020-12-01 Koninklijke Philips N.V. Shaving apparatus, a cutting unit and a shaving head
US9555551B2 (en) * 2012-01-10 2017-01-31 Koninklijke Philips N.V. Rotary shaving unit
US20150040403A1 (en) * 2012-01-10 2015-02-12 Koninklijke Philips N.V. Rotary shaving unit
US20150343652A1 (en) * 2014-05-30 2015-12-03 Izumi Products Company Rotary electric shaver
US9789616B2 (en) * 2014-05-30 2017-10-17 Izumi Products Company Rotary electric shaver
CN107666991A (en) * 2015-05-21 2018-02-06 皇家飞利浦有限公司 The improved cutter unit and shaving head of operated shaving appliance
JP2018514323A (en) * 2015-05-21 2018-06-07 コーニンクレッカ フィリップス エヌ ヴェKoninklijke Philips N.V. Improved cutting unit and shaving head of a shaving device
CN107666991B (en) * 2015-05-21 2019-08-16 皇家飞利浦有限公司 The improved cutter unit and shaving head of operated shaving appliance
US10836057B2 (en) 2015-05-21 2020-11-17 Koninklijke Philips N.V. Cutting unit and shaving head of a shaving device
WO2016184693A1 (en) * 2015-05-21 2016-11-24 Koninklijke Philips N.V. Improved cutting unit and shaving head of a shaving device
US20170144317A1 (en) * 2015-11-24 2017-05-25 Izumi Products Company Rotary electric shaver and method of manufacturing inner blade of rotary electric shaver
US10471612B2 (en) * 2015-11-24 2019-11-12 Maxell Izumi Co., Ltd. Rotary electric shaver and method of manufacturing inner blade of rotary electric shaver

Also Published As

Publication number Publication date
BE651972A (en) 1965-02-18
DE1285917B (en) 1968-12-19
CH439008A (en) 1967-06-30
FR1406225A (en) 1965-07-16
ES303268A1 (en) 1964-11-01
NL296894A (en)
GB1075899A (en) 1967-07-12

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