US3242569A - Dry shaver head biased by springs of unequal strength - Google Patents

Dry shaver head biased by springs of unequal strength Download PDF

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Publication number
US3242569A
US3242569A US392700A US39270064A US3242569A US 3242569 A US3242569 A US 3242569A US 392700 A US392700 A US 392700A US 39270064 A US39270064 A US 39270064A US 3242569 A US3242569 A US 3242569A
Authority
US
United States
Prior art keywords
spring
springs
shear plate
cutter
dry shaver
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
US392700A
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English (en)
Inventor
Driest Jan Van Der
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
North American Philips Co Inc
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 US3242569A publication Critical patent/US3242569A/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

Definitions

  • the invention relates to a shaving head for use in a dry shaving apparatus in which the shear plate together with the cutting member can be pressed inwardly against spring pressure into a terminal position determined by a stop.
  • the invention has for its object to improve the adaptability of shaving heads of this kind to the particular conditions of hair growth and skin of the users and is characterized in that a weak spring and a strong spring are connected in series.
  • the user who Wants only a slight pressure for given parts of the skin surface or for the whole skin may employ solely the light pressure produced by depressing the light spring, since the series combination provides a distinctly perceptible change in spring pressure when the light spring has reached its operative terminal position and the stronger spring is depressed.
  • a second pressure phase starts in which the pressure is determined by the depression of the stronger spring until the shear plate comes into contact with a stationary stop.
  • the invention is preferably carried out so that the weak spring and the strong spring are arranged each on one side of a common, slidable cup spring.
  • This provides a simple arrangement with a small number of parts while the transition from one phase to the other can be achieved simply by providing, at the side of the weak spring, in line with the driving spindle, a pivot with which the cup spring comes into contact when the weak spring is depressed.
  • the figure shows an axial sectional view across the driving part of the rotating cutter of a dry shaving apparatus.
  • a cutting member 2 formed by a cutter rim, in a resilient manner by the rotating spindle 3, the coupling being established in a known manner by means of a spring element 6 accommodated in a slot 5, the ends 7 of said ele-- ment being fixed in cavities of a hood 8 fastened to the cutter rim 2.
  • the stronger spring 10, lying in series with the weaker spring 9, is accommodated completely in the cavity 11 of the spindle 3, which itself is housed in a central hub cavity 12 of polyangular section of a rotating driving spindle 13 driven by means of a gear wheel (not shown).
  • the springs 9 and 10 are disposed each on one side of a common cup 14, which constitutes the bottom of a slidable element 15, adapted to slide in the cavity 11.
  • the weak spring 9 is wound helically on the sides of a pivot 16, which forms the end of a shaft 17, around which the driving spindle 13 is adapted to rotate.
  • the spring 9 bears on the bottom part 18 of the cavity 12 in the spindle 13. It will be obvious that when the plate 1 is depressed during the shaving operation first the inward movement of the rotatable spindle 3 is transferred through a spring 10, which is not yet depressed, and via a cup 14 to the weak spring 9, which is thus depressed.
  • the spring pressure to be overcome may amount to 60 gms. In the position shown in the drawing this pressure has been overcome so that the cup 14, which constitutes so to say a slidable bottom for the cavity 11 of the coupling member 13, bears on the end of the pivot 16.
  • the stronger spring 10 is compressed between the upper wall of the cavity 11 and the cup 14 and so far the cup is thus held on a ridge formed by a ring 19 located in the cavity 11.
  • the pressure on the shaving head then may have a value of 400 gms.
  • a shaving head for a dry shaver comprising a shear plate, a rotary cutter co-acting with said shear plate, a pair of springs of unequal strength arranged in line with each other and supporting said shear plate and rotary cutter whereby both are depressible against said spring pressure, a stop for arresting the movement of said shear plate and cutter in one direction, a slidable element having said springs engaging therewith on opposite sides thereof, and a fixed abutment against which said slidable element engages after a given compression of said weaker spring by a force applied to the shear plate of said dry shaver.
  • a shaving head for a dry shaver as claimed in claim 1 further comprising a spindle for driving said cutter, said spindle being arranged co-axially with said cutter, said springs being coil springs arranged co-axially with said cutter, and the latter being rotatable by said spindle through said springs.
  • a shaving head for a dry shaver comprising a shear plate, a rotary cutter co-acting with said shear plate, a spindle having an axial cavity therein and being Patented Mar. 29, 1966 provided for driving said cutter, a pair of springs of unequal strength arranged in line with each other and supporting said shear plate and rotary cutter whereby both are depressible against said spring pressure, an abutment positioned on the wall of said cavity, a coupling member for transmitting the rotation of said spindle to said cutter, said coupling member being located in said axial cavity of the spindle and being movable axially therein as well as being rotatable with said spindle, the stronger of said springs being situated in said axial cavity and said coupling being provided with a movable member constituted of a cup being slidable axially in said cavity and engageable under the pressure of said stronger spring with said abutment on the wall of the cavity and 4- wherein said weaker spring is held between said cup and a

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)
US392700A 1963-09-13 1964-08-28 Dry shaver head biased by springs of unequal strength Expired - Lifetime US3242569A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL297911 1963-09-13

Publications (1)

Publication Number Publication Date
US3242569A true US3242569A (en) 1966-03-29

Family

ID=19755044

Family Applications (1)

Application Number Title Priority Date Filing Date
US392700A Expired - Lifetime US3242569A (en) 1963-09-13 1964-08-28 Dry shaver head biased by springs of unequal strength

Country Status (4)

Country Link
US (1) US3242569A (de)
DE (1) DE1228161B (de)
GB (1) GB1075089A (de)
NL (1) NL297911A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3389467A (en) * 1965-06-10 1968-06-25 Krups Robert Dry shaver having a spring biased rocking lever to reciprocate a cutter block
US4038748A (en) * 1972-03-27 1977-08-02 Tyler Tracy B Rotary dry shaver with tiltable shear plates
US4087909A (en) * 1972-07-20 1978-05-09 Sharp Kabushiki Kaisha Dry shaver
US4292493A (en) * 1976-11-05 1981-09-29 Aga Aktiebolag Method for decomposing ozone
US20100275446A1 (en) * 2009-04-29 2010-11-04 Rovcal, Inc. Rotary electric shaver
EP3626415A1 (de) 2018-09-21 2020-03-25 Koninklijke Philips N.V. Verbesserte haarschneideeinheit für einen rasierapparat

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2416776A (en) * 1944-10-23 1947-03-04 Schlotthauer Herman Shaver
FR1050454A (fr) * 1951-11-22 1954-01-07 Tête de coupe pour rasoir mécanique
GB784909A (en) * 1955-02-24 1957-10-16 Willem Bakker Dry shaver

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1335018A (fr) * 1962-06-18 1963-08-16 Alsthom Cgee Système de ressorts à flexibilité variable

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2416776A (en) * 1944-10-23 1947-03-04 Schlotthauer Herman Shaver
FR1050454A (fr) * 1951-11-22 1954-01-07 Tête de coupe pour rasoir mécanique
GB784909A (en) * 1955-02-24 1957-10-16 Willem Bakker Dry shaver

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3389467A (en) * 1965-06-10 1968-06-25 Krups Robert Dry shaver having a spring biased rocking lever to reciprocate a cutter block
US3462833A (en) * 1965-06-10 1969-08-26 Krups Robert Drive pin assembly for the cutter block of an electric razor
US4038748A (en) * 1972-03-27 1977-08-02 Tyler Tracy B Rotary dry shaver with tiltable shear plates
US4087909A (en) * 1972-07-20 1978-05-09 Sharp Kabushiki Kaisha Dry shaver
US4292493A (en) * 1976-11-05 1981-09-29 Aga Aktiebolag Method for decomposing ozone
US20100275446A1 (en) * 2009-04-29 2010-11-04 Rovcal, Inc. Rotary electric shaver
US9027251B2 (en) 2009-04-29 2015-05-12 Spectrum Brands, Inc. Rotary electric shaver
EP3626415A1 (de) 2018-09-21 2020-03-25 Koninklijke Philips N.V. Verbesserte haarschneideeinheit für einen rasierapparat
WO2020058106A1 (en) 2018-09-21 2020-03-26 Koninklijke Philips N.V. Improved hair-cutting unit for a shaving device
US11465301B2 (en) * 2018-09-21 2022-10-11 Koninklijke Philips N.V. Hair-cutting unit for a shaving device

Also Published As

Publication number Publication date
NL297911A (de)
GB1075089A (en) 1967-07-12
DE1228161B (de) 1966-11-03

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