US3624681A - Resiliently supported shear plate - Google Patents

Resiliently supported shear plate Download PDF

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Publication number
US3624681A
US3624681A US852305A US3624681DA US3624681A US 3624681 A US3624681 A US 3624681A US 852305 A US852305 A US 852305A US 3624681D A US3624681D A US 3624681DA US 3624681 A US3624681 A US 3624681A
Authority
US
United States
Prior art keywords
shaft
shear plate
cutter
outward
shear
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
US852305A
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English (en)
Inventor
Frans Zuurveen
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 US3624681A publication Critical patent/US3624681A/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
    • B26B19/145—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

Definitions

  • an attempt to solve this problem includes imparting to the shaving head a certain adaptability to the various shapes of the face, which adaptation is made possible by the various positions which the depressible shaving head can occupy relative to the face.
  • One of the factors which determine the resistance offered by the skin in this adapting process is the force with which the cutting member is urged against the shear plate.
  • this resistance force produces a skin pressure which, as experience has shown, is not always sufiicient to produce a close shave, with the result during use of the known apparatus, that the shear plates are usually pressed into their extreme depressed positions thus instead of adaptation of the shear plate to the various shapes of the face, the only adaptivity factor remaining is the capacity for deformation of the shear plate itself.
  • the invention is distinguished by the fact that the shear plate is supported by a separate spring which enables the skin pressure to be increased.
  • a resiliently arranged driving shaft which actuates the cutter member, for which purpose the end of the driving shaft facing the shear plate is in line or point contact with the surface of the shear plate facing the driving shaft.
  • the invention is not restricted to this embodiment relating to a resilient support of the shear plate with a thrust force confined within a narrow limit.
  • the spring pressure is adjustable.
  • the driving shaft is coupled with the cutter member for driving same in rotation, the upper part of the driving shaft being shaped in the form of a coupling pin which passes with a certain amount of clearance through an aperture disposed centrally of a blade-carrying holder part of the cutter member, while the free end of the coupling pin is maintained in engagement with the shear plate.
  • a highly advantageous embodiment in which at least two shaving heads are used which are engaged by their mutually adjacent side edges is distinguished in that between the driving shaft and a motor coupling shaft there is established a coupling which is movable in at least two directions; the lower part of the driving shaft has a noncircular cross section and is coupled with the motor coupling shaft, and is arranged so as to ,be movable in a centrally disposed aperture in this motor coupling shaft.
  • This aperture extends from the free end of the motor coupling shaft in the direction of length thereof, while the part of the driving shaft situated between this lower part and the coupling pin is flexible or bendable relative to its own longitudinal axis.
  • FIG. I is a longitudinal sectional view of an embodiment according to the invention.
  • FIG. 2 is a perspective view of a spring system which may be used in the resilient support of the driving shaft.
  • FIG. 1 there is shown a group of shaving heads, which are operated by a single driving shaft I.
  • each shear plate has a generally inverted U-shape and the inner sidewall of plate 6 merge into a substantially flat plate 26.
  • the shear plates 6, 7, 8 and 9 cooperate with cutter members l0. l1, l2 and 13 respectively, Each cutter member comprises at least one blade arm I4, l5, l6 and 17 and a blade-carrying holder part 18, I9, 20 or 21, respectively.
  • the driving shaft 1 comprises an upper part shaped in the form of a coupling pin 22, a lower part 24 cooperating with a motor coupling shaft 23 and an intermediate middle part 25.
  • the coupling pin 22 has a cross-sectional area which is greater than that of the middle part 25 of the driving shaft 1, and which passes with a certain amount of clearance through apertures 27, 28, 29 and 30 provided centrally of the bladecarrying holder parts l8, 19, 20 and 21 respectively.
  • the coupling pin 22 is engaged to these holder parts for driving same in rotation about the drive shaft axis.
  • the end 31 of the coupling pin 22 facing the shear plate 6 has a curved surface which is maintained in engagement with that surface 26 of the plate which faces the driving shaft 1.
  • the lower part 24 of the driving shaft is axially movable in a central aperture 32 in the motor coupling shaft 23, which aperture 32 extends from the free end of shaft 23 axially towards the motor (not shown) of the apparatus.
  • the middle part 25 of the driving shaft 1 is surrounded by a spring 33; the free end of the motor coupling shaft 23 and that end of the coupling pin 22 which faces the motor coupling shaft 23 form the abutments which the ends of the spring 33 resiliently engage.
  • the spring 33 may be a helical spring, as is shown in FIG. 1, but it may also take the form of a spring system 34 (FIG. 2) comprising at leas three parallel connected leaf springs 35. While the driving shaft 1 actuates at least two shaving heads, the middle part 25 of this shaft 1 is flexible or bendable about its own axis.
  • the invention is not restricted to embodiments in which the separate spring which supports the central shear plate is situated so as to surround the driving shaft.
  • separate springs of selectable spring pressure can be used in the invention to particular advantage, because they enable the invention to be successfully applied to the shaving of highly sensitive parts of the face.
  • the blade-car rying holder parts of the cutter members are resiliently supported by a spring system comprising separate springs 36, 37, 38 and 39 connected in series.
  • a dry shaver including a housing, a rotary drive shaft, and a shaving head actuated by said shaft and comprising an axially depressible shear plate, first means resiliently urging the shear plate outward relative to the housing and a cooperating cutter engaged and driven by the shaft, the shaver further comprising second means resiliently urging the shaft outward, the shaft having a first end engaging a portion of said shear plate and urging same outward.
  • a dry shaver including a housing, a rotary drive shaft, and a shaving head actuated by said shaft and comprising a plurality of concentric, axially and independently depressible shear plates including a central plate, a rotatable cutter operable with each shear plate, each cutter having a central aperture through which extends said drive shaft in driving engagement, first resilient means urging each cutter outward against its corresponding shear plate, separate second resilient means urging the drive shaft outward, the shaft having a first end in engagement with the central shear plate and urging same out ward, the shear plates each engaged to the adjacent plate for limited relative movement, whereby said plates are axially depressible against said resilient means associated therewith.
  • one of said engaging surfaces of the shaft and shear plate is substantially planar and the other is curved.
  • each resilient means comprises at least one spring having a selected spring pressure applicable to the components of the apparatus it con- IaCtS.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)
US852305A 1968-08-31 1969-08-22 Resiliently supported shear plate Expired - Lifetime US3624681A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6812446A NL6812446A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1968-08-31 1968-08-31

Publications (1)

Publication Number Publication Date
US3624681A true US3624681A (en) 1971-11-30

Family

ID=19804512

Family Applications (1)

Application Number Title Priority Date Filing Date
US852305A Expired - Lifetime US3624681A (en) 1968-08-31 1969-08-22 Resiliently supported shear plate

Country Status (5)

Country Link
US (1) US3624681A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE1942108A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2017134A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1281834A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (1) NL6812446A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4001933A (en) * 1975-06-04 1977-01-11 Sperry Rand Corporation Cutter drive arrangement for an electric dry shaver
US6668827B2 (en) * 2000-05-16 2003-12-30 Nektar Therapeutics Systems devices and methods for opening receptacles having a powder to be fluidized
US20070101575A1 (en) * 2005-11-09 2007-05-10 Izumi Products Company Rotary electric shaver

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR913779A (fr) * 1943-10-27 1946-09-19 Philips Nv Rasoir à sec à peigne mobile
US2526153A (en) * 1946-11-20 1950-10-17 Herbert E Page Multihead dry shaver
US2536015A (en) * 1944-03-08 1950-12-26 Konrad Hermann Razor and comb
GB784909A (en) * 1955-02-24 1957-10-16 Willem Bakker Dry shaver
GB811207A (en) * 1956-10-23 1959-04-02 Alexis Leandre Jacques Victor Improvements in and relating to electric dry shavers

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR913779A (fr) * 1943-10-27 1946-09-19 Philips Nv Rasoir à sec à peigne mobile
US2536015A (en) * 1944-03-08 1950-12-26 Konrad Hermann Razor and comb
US2526153A (en) * 1946-11-20 1950-10-17 Herbert E Page Multihead dry shaver
GB784909A (en) * 1955-02-24 1957-10-16 Willem Bakker Dry shaver
GB811207A (en) * 1956-10-23 1959-04-02 Alexis Leandre Jacques Victor Improvements in and relating to electric dry shavers

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4001933A (en) * 1975-06-04 1977-01-11 Sperry Rand Corporation Cutter drive arrangement for an electric dry shaver
US6668827B2 (en) * 2000-05-16 2003-12-30 Nektar Therapeutics Systems devices and methods for opening receptacles having a powder to be fluidized
US20050161041A1 (en) * 2000-05-16 2005-07-28 Carlos Schuler Systems devices and methods for opening receptacles having a powder to be fluidized
US7814905B2 (en) 2000-05-16 2010-10-19 Novartis Ag Systems devices and methods for opening receptacles having a powder to be fluidized
US20070101575A1 (en) * 2005-11-09 2007-05-10 Izumi Products Company Rotary electric shaver
US7584541B2 (en) * 2005-11-09 2009-09-08 Izumi Products Company Rotary electric shaver

Also Published As

Publication number Publication date
FR2017134A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1970-05-15
GB1281834A (en) 1972-07-19
NL6812446A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1970-03-03
DE1942108A1 (de) 1970-03-05

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