US3890705A - Coupling pin for an electric dry-shaver - Google Patents

Coupling pin for an electric dry-shaver Download PDF

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Publication number
US3890705A
US3890705A US420115A US42011573A US3890705A US 3890705 A US3890705 A US 3890705A US 420115 A US420115 A US 420115A US 42011573 A US42011573 A US 42011573A US 3890705 A US3890705 A US 3890705A
Authority
US
United States
Prior art keywords
coupling pin
cutter
coupling
walls
shear plate
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
US420115A
Other languages
English (en)
Inventor
Eduard Willem Tietjens
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.)
US Philips Corp
Original Assignee
US Philips Corp
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 US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US3890705A publication Critical patent/US3890705A/en
Assigned to BANK AND TRUST COMPANY reassignment BANK AND TRUST COMPANY MORTGAGE (SEE DOCUMENT FOR DETAILS). Assignors: REHEIS CHEMICAL COMPANY, INC.
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
    • B26B19/145—Cutters being movable in the cutting head
    • 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
    • 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
    • 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
    • B26B19/3846—Blades; Cutters

Definitions

  • ABSTRACT A sheet metal coupling pin for driving a rotatable cutter of a dryshaver, which cutter is capable of limited tilting movement and is formed with a coupling slot, the coupling pin being formed with rounded portions the radii of curvature of which are in a given relationship with the length and the width of the slot.
  • the invention relates to a metal coupling pin for use in an electric dry-shaver having at least one shaving head capable of limited tilting movement.
  • a cut ter comprises a plurality of blades, and is adapted to be rotatably driven and co-operates with the shaving head.
  • a coupling member which is also adapted to be rotatably driven, is capable of limited tilting movement. at its end nearer the cutter carries the coupling pin and thrusts the coupling pin into engagement with the cut ter and hence the cutter into engagement with the shaving head under spring action.
  • the cutter is formed with a coupling slot of rectangular cross-section having parallel walls into which the coupling pin engages so as to cooperate with the shorter walls of the coupling slot by means of portions having a curvature, the radius of which is substantially equal to one half of the width of the longer walls. and to co-operate with the longer walls by means of portions having a curvature the radius of which is substantially equal to one half of the width of the shorter walls.
  • the coupling pin described in said prior art US. Pat. No. 3,748,73l provides satisfactory results, because there is a universal driving relationship between the cutter and the coupling pin.
  • the coupling pin is a hardened steel component, the cylindrical lateral surfaces of which having the said radii of curvature was formed by grinding.
  • Such coupling pins are comparatively expensive, in particular because of the required grinding operation which has to be performed with a comparatively high degree of accuracy on a component which owing to its small size is difficult to handle.
  • This invention is characterized in that the coupling pin is made of steel sheet, and its portions which cooperate with the longer walls of the coupling slot comprise extensions of the required radius of curvature made by pressing.
  • the coupling pin according to the invention can be manufactured by stamping, which means a considerable simplification of the manufacture.
  • FIG. I is a partial sectional view of an electric dryshaver
  • FIG. 2 is an elevation sectional view of the coupling pin of FIG. I shown 20 times actual size, which is mounted in the end of a coupling member and cooperates with a cutter part shown in section,
  • FIG. 3 is a side elevation of the coupling member shown in FIG. 2,
  • FIG. 4 is a plan view of a coupling member arranged in a rectangular coupling slot of a cutter in a position in which it is slightly rotated about its axis from a sub stantially parallel relationship with the slot, so that its extensions engage the longer walls of the slot, and
  • FIG. 5 is an elevation sectional view of the coupling pin and of part of a cooperating cutter taken at right angles to the longer walls of the coupling slot.
  • FIG. I there is shown a circular shaving head shear plate I.
  • the head has a number of slits 2 and is capable of limited tilting movement rela tive to a frame plate 3 which is connected to the housing, not shown, of the dry-shaver.
  • a cutter 4 which is adapted to be rotatably driven and comprises six blades 5 cooperates with the shear plate I.
  • a coupling member 6, is rotatably driven. is capable of a limited tilting movement, and carries a coupling pin 7 at its end near the cutter.
  • the coupling member 6 has terminal part as the drive end of its coupling pin 7 thrust into engagement with a stop member 30 of the cutter 4 by a compression spring 8 mounted in a recess 9. As a result the cutter 4 is thrust into engagement with the shear plate 1.
  • the cutter 4 is formed with a coupling slot I0 of rectangular section, see in particular FIG. 4, having two pairs of parallel walls 11, I2 and I3. 14.
  • the coupling pin engages in the slot I0 and cooperates with the shorter walls I1 and I2 by means of portions 15 and 16 having a curvature the radius of which is substantially equal to one half of the width of the longer walls 13 and I4, and cooperates with the said longer walls by means of portions 17 and 18 having a curvature the radius of which is substantially equal to one half of the width of the shorter walls 11 and 12.
  • These ears are also bent out of the plane ofthe sheet material as indicated at 28, 29 in FIG. 4, wherein the radius of the outer surface of the curvature of each of said ears 28, 29 is substantially equal to one-half the length of the short side 11 of the rectangular aperture.
  • the lower end of the coupling member 6 is widened to form a flange 19 of square cross-section which fits in a chamber 20 of corresponding crosssection formed in a gear-wheel 21.
  • the chamber 20 is closed by means of a spring clip 22.
  • the gear-wheel 21 On its other surface the gear-wheel 21 has a hub 23 in which a bore 24 is formed in which fits a pin 25, the other end 26 of which is knurled and pressed into a mounting plate 27.
  • the gear-wheel 21 can be driven by a rotating electric motor via a transmission gear, not shown, the coupling member 6 transmitting the rotary movement to the cutter 4.
  • a shaving head of a rotary dry shaver including a shear plate tiltably mounted within a housing, a rotatably cutter positioned for engaging said shear plate.
  • drive means for imparting rotary motion.
  • a coupling member having a first part engaged and driven by said drive means and a drive end formed as a coupling pin for engaging and driving said cutter.
  • said cutter has defined therein a central, rectangular aperture defining a pair of long side-walls and a pair of side-walls for receiving said coupling pin
  • said coupling pin is formed of sheet material and comprises a shank having length and width in the plane of the sheet and thickness. and a drive end which is insertable axially within said aperture and has a pair of ears which extend in the opposite directions widthwise each bar having a rounded outer edge of radius substantially equal to one-half of the length of one of said long walls.
  • each ear also curved out of the plane of said sheet about a lengthwise axis, with the outer surface of each ear having a radius about said axis substantially equal to one-half the length of one of said shorter walls.
  • said cutter further comprises a stop member covering said aperture and situated intermediate the shear plate and coupling pin and wherein said drive end of the coupling pin has a rounded terminal part which is urged axially into engagement with said stop member.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)
US420115A 1972-12-22 1973-11-29 Coupling pin for an electric dry-shaver Expired - Lifetime US3890705A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7217486A NL7217486A (en)) 1972-12-22 1972-12-22

Publications (1)

Publication Number Publication Date
US3890705A true US3890705A (en) 1975-06-24

Family

ID=19817607

Family Applications (1)

Application Number Title Priority Date Filing Date
US420115A Expired - Lifetime US3890705A (en) 1972-12-22 1973-11-29 Coupling pin for an electric dry-shaver

Country Status (9)

Country Link
US (1) US3890705A (en))
AT (1) AT324162B (en))
CA (1) CA987092A (en))
CH (1) CH568825A5 (en))
DE (1) DE2360085A1 (en))
ES (1) ES421647A1 (en))
FR (1) FR2214255A5 (en))
GB (1) GB1388520A (en))
NL (1) NL7217486A (en))

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4257161A (en) * 1977-11-28 1981-03-24 U.S. Philips Corporation Dry-shaving apparatus
US4663842A (en) * 1984-06-26 1987-05-12 U.S. Philips Corporation Shaving apparatus
US4998352A (en) * 1987-01-27 1991-03-12 U.S. Philips Corp. Cutting unit for a shaving apparatus
US6145200A (en) * 1998-03-27 2000-11-14 U.S. Philips Corporation Shaving apparatus
US20030019107A1 (en) * 2001-07-30 2003-01-30 Pieter Visman Coupling for internal cutting member of rotary shaving apparatus
US20060048390A1 (en) * 2003-01-20 2006-03-09 Koninklijke Philips Electronics, N.V. Shaving apparatus
WO2018149090A1 (zh) * 2017-02-14 2018-08-23 广东罗曼智能科技股份有限公司 一种可拆卸浮动式剃须刀
US20190143546A1 (en) * 2016-06-21 2019-05-16 Koninklijke Philips N.V. Shaving apparatus with detachable cutting unit
KR20210022713A (ko) * 2018-07-25 2021-03-03 썬전 수카스 테크놀로지 컴퍼니 리미티드 부동 회전 구조, 개인 케어 장치 및 마사지기
KR20210024057A (ko) * 2018-07-25 2021-03-04 썬전 수카스 테크놀로지 컴퍼니 리미티드 면도기 및 블레이드 헤드 부동 구조
US20210347074A1 (en) * 2018-10-23 2021-11-11 Koninklijke Philips N.V. Hand-held appliance with improved coupling structure for a functional attachment of the appliance

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4219930A (en) 1978-07-07 1980-09-02 Remington Products, Inc. Cutter head assembly for an electric dry shaver

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3078571A (en) * 1959-02-20 1963-02-26 Philips Corp Cutting head for use in a dry shaving apparatus having an oval shape movable cutter
US3213719A (en) * 1962-11-01 1965-10-26 Robert C Kloack Rotary driving tool with universal action
US3399453A (en) * 1965-07-15 1968-09-03 Philips Corp Dry-shaving apparatus having shaving locking means
US3748731A (en) * 1971-08-30 1973-07-31 Philips Corp Coupling for shaver drive shaft and cutter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3078571A (en) * 1959-02-20 1963-02-26 Philips Corp Cutting head for use in a dry shaving apparatus having an oval shape movable cutter
US3213719A (en) * 1962-11-01 1965-10-26 Robert C Kloack Rotary driving tool with universal action
US3399453A (en) * 1965-07-15 1968-09-03 Philips Corp Dry-shaving apparatus having shaving locking means
US3748731A (en) * 1971-08-30 1973-07-31 Philips Corp Coupling for shaver drive shaft and cutter

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4257161A (en) * 1977-11-28 1981-03-24 U.S. Philips Corporation Dry-shaving apparatus
US4663842A (en) * 1984-06-26 1987-05-12 U.S. Philips Corporation Shaving apparatus
US4998352A (en) * 1987-01-27 1991-03-12 U.S. Philips Corp. Cutting unit for a shaving apparatus
US6145200A (en) * 1998-03-27 2000-11-14 U.S. Philips Corporation Shaving apparatus
US20030019107A1 (en) * 2001-07-30 2003-01-30 Pieter Visman Coupling for internal cutting member of rotary shaving apparatus
US6722038B2 (en) * 2001-07-30 2004-04-20 Koninklijke Philips Electronics N.V. Coupling for internal cutting member of rotary shaving apparatus
US20060048390A1 (en) * 2003-01-20 2006-03-09 Koninklijke Philips Electronics, N.V. Shaving apparatus
US7530171B2 (en) 2003-01-20 2009-05-12 Koninklijke Philips Electronics N.V. Shaving apparatus
US10850408B2 (en) * 2016-06-21 2020-12-01 Koninklijke Philips N.V. Shaving apparatus with detachable cutting unit
US20190143546A1 (en) * 2016-06-21 2019-05-16 Koninklijke Philips N.V. Shaving apparatus with detachable cutting unit
WO2018149090A1 (zh) * 2017-02-14 2018-08-23 广东罗曼智能科技股份有限公司 一种可拆卸浮动式剃须刀
US10357890B2 (en) 2017-02-14 2019-07-23 Guangdong Roman Technology Co., Ltd. Detachable floating shaver
KR20210022713A (ko) * 2018-07-25 2021-03-03 썬전 수카스 테크놀로지 컴퍼니 리미티드 부동 회전 구조, 개인 케어 장치 및 마사지기
KR20210024057A (ko) * 2018-07-25 2021-03-04 썬전 수카스 테크놀로지 컴퍼니 리미티드 면도기 및 블레이드 헤드 부동 구조
EP3827939A4 (en) * 2018-07-25 2021-07-07 Shenzen Soocas Technology Co., Ltd. RAZOR AND FLOATING BLADE STRUCTURE
EP3827940A4 (en) * 2018-07-25 2021-07-14 Shenzen Soocas Technology Co., Ltd. FLOATING ROTATION STRUCTURE, PERSONAL SWIMMING DEVICE AND MASSAGE DEVICE
US20210347074A1 (en) * 2018-10-23 2021-11-11 Koninklijke Philips N.V. Hand-held appliance with improved coupling structure for a functional attachment of the appliance
US11833699B2 (en) * 2018-10-23 2023-12-05 Koninklijke Philips N.V. Hand-held appliance with improved coupling structure for a functional attachment of the appliance

Also Published As

Publication number Publication date
ES421647A1 (es) 1976-04-01
CA987092A (en) 1976-04-13
AT324162B (de) 1975-08-25
FR2214255A5 (en)) 1974-08-09
NL7217486A (en)) 1974-06-25
CH568825A5 (en)) 1975-11-14
GB1388520A (en) 1975-03-26
DE2360085A1 (de) 1974-07-04

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Legal Events

Date Code Title Description
AS Assignment

Owner name: BANK AND TRUST COMPANY, 225 FRANKLIN STREET, BOSTO

Free format text: MORTGAGE;ASSIGNOR:REHEIS CHEMICAL COMPANY, INC.;REEL/FRAME:004586/0269

Effective date: 19860411

Owner name: BANK AND TRUST COMPANY,MASSACHUSETTS

Free format text: MORTGAGE;ASSIGNOR:REHEIS CHEMICAL COMPANY, INC.;REEL/FRAME:004586/0269

Effective date: 19860411