US3389467A - Dry shaver having a spring biased rocking lever to reciprocate a cutter block - Google Patents

Dry shaver having a spring biased rocking lever to reciprocate a cutter block Download PDF

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Publication number
US3389467A
US3389467A US556510A US55651066A US3389467A US 3389467 A US3389467 A US 3389467A US 556510 A US556510 A US 556510A US 55651066 A US55651066 A US 55651066A US 3389467 A US3389467 A US 3389467A
Authority
US
United States
Prior art keywords
cutter block
rocking lever
spring
face
ram
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
US556510A
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English (en)
Inventor
Baumann Kurt
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.)
Robert Krups GmbH and Co KG
Original Assignee
Robert Krups GmbH and Co KG
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 Robert Krups GmbH and Co KG filed Critical Robert Krups GmbH and Co KG
Application granted granted Critical
Publication of US3389467A publication Critical patent/US3389467A/en
Assigned to ROBERT KRUPS STIFTUNG & CO., KG reassignment ROBERT KRUPS STIFTUNG & CO., KG CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE 1-19-81 Assignors: ROBERT KRUPS
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
    • B26B19/02—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers of the reciprocating-cutter type
    • 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

Definitions

  • a shearing head for electric razors which comprises 'a rocking lever, a cutter block, and a shearing comb sheet having an inner face.
  • the cutter block reciprocates by the rocking lever urged by a spring towards the inner face of the shearing comb sheet.
  • a driving pin is provided on the rocking lever.
  • a sliding guide bushing is provided and a bearing member is swingably mounted on the sliding guide bushing having a pivot pin.
  • the cutter block is operatively connected with the driving pin by means of the guide bushing and the bearing member.
  • a ram having an end face is disposed in the center of the bearing member, as well as projects into the space defined between the pivot pin.
  • the driving pin includes a piston having a supporting face, the end face of the ram forcibly engages the supporting face of the piston' by means of the spring, and the engaging point of the end face of the ram with the supporting face of the piston is disposed at the center of the pivot axis deiined by the pivot pins.
  • the present invention relates to a shearing head for electric razors with a cutter block reciprocated by a rocking lever and pressed by a spring towards the inner face of a shearing comb sheet, which cutter block is connected with a driving pin provided on the rocking lever by means of a slidable guide bushing and a bearing member swingably provided on the latter.
  • the rocking lever serves as connecting member between the electric drive of an electric razor and the reciprocating cutter block.
  • the transmission member provided within the range of the shearing head, which transmission member transmits the movement of the rocking lever to the cutter block, is of essential importance.
  • the spring charge of the cutter block which originates from a spring charged supporting face of the driving pin, is now transmitted by means of a ram through the bearing member of the cutter block, which is disposed in the center of the bearing member.
  • the flow of forces originating from the spring charged supporting face of the driving pin does not pass on its way to the cutter block the pivot bearing of the bearing member. Rather this pivot bearing is free from spring forces, which brings about low wear and an operation which lacks any noises.
  • a unitary spring charge of the cutter block is obtained.
  • the engaging point between the end face of the ram and the supporting face of the driving pin is disposed at the height of the center of the axis of the pivot bearings.
  • the engaging point is simultaneously that point, about which the ram is tipped on its supporting face during swinging of the cutter block about its cross-axis. A sliding of the ram on its supporting face and thereby unnecessary Wear is avoided.
  • the ram lies practically always at the same point of the spring charged supporting face of the driving pin. Suitably one rounds up the end face of the ram and connects the latter rigidly with the bearing member.
  • the spring charged supporting face on the driving pin can be produced in an advantageous manner, such that the driving pin comprises a sleeve being connected at one end with a rocking lever and having at the other end an opening, wherein the inner space of the sleeve has a spring-biased piston slidable in the direction towards the opening,
  • the spring charged displaceable piston is the supporting tace for the ram, which projects through the opening into the inner space of the sleeve.
  • Such driving pin can be Prefabricated as a structural unit already together with the spring, which is disposed inside thereof. Also by this arrangement the assembly of the cutter block, connected with the bearing member, with the driving pin of the rocking lever is simplified. This is particularly of importance as these parts can be easily separated from each other for the purpose of cleaning.
  • FIGURE l is a side elevation of a shearing head designed in accordance with the present invention, its upper portion being shown in section;
  • FIG. 2 is a section along the lines lL-II of FIG. 1.
  • the dry razor comprises a shearing head which has at its upper end a cutter block 10, which consists of individual cutter blades 11, the latter being connected together by means of tubes 12 and intermediately disposed distance holders 13.
  • the cutter block 10 is arranged on its bearing member 14.
  • the integrally formed bearing member 14 has at its ends two upwardly bent webs for gripping the cutter block 10 and two bow-shaped upwardly bent leg members 16.
  • the rocking lever 17, of which merely the upper part is shown in the drawing, has an opening 18 with an inserted bearing bushing, which serves for mounting the rocking lever 17.
  • a driving pin 20 which extends in longitudinal direction of the rocking lever 17
  • the driving pin 2t is surrounded by a slidable guide bushing 21.
  • the guide bushing 21 has at the oppositely disposed sides each a pivot pin 22, on each of which a leg 16 of the bearing member 14 engages by ⁇ means of a recess provided therein.
  • a ram 24 In the longitudinal center and at the apex of the bowshaped upwardly directed legs 16 of the bearing member 14 is secured a ram 24.
  • the ram 24 projects with its rounded end face into the space between the two pivot pins 22 and in particular such that the point of the rounded end face 25 comes to lie in the height of the axis 23 through the two pivot pins 22.
  • This end face 25 cooperates with a spring-biased supporting face provided on the driving pin 20.
  • the driving pin 20 comprises a sleeve 26, the lower end of which is secured to the rocking lever 17 and the upper end of which has a narrowed opening 27 at its end face.
  • the outer face of the sleeve 26 serves as a slide bearing for the guide bushing 21.
  • Inside of the sleeve 26 is disposed a helical spring 28, one end of which engages on a counter-bearing 29 at the lower end of the sleeve 26 and the other end of which supports itself on a piston 30 displaceable inside of the sleeve 26.
  • the piston 30 is pressed towards the narrowed opening 27 of the sleeve 26.
  • the ram 24 projects, as shown in FIG. 2, through the opening 27 at the upper end of the sleeve 26, and comes into engagement forcibly at the spring-biased piston 30 inside of the sleeve 26.
  • the engaging point be tween the piston 30 and the end face 25 of the ram 24 is disposed in a plane extending through the axis 23 of the pivot pin 22.
  • the present invention is not limited to the shown example, rather various changes are possible. Such it would be possible to make the bearing member 14 releasable from the cutter block 10.
  • a shearing head for electric razors comprising a rocking lever, a cutter block, and a shearing comb sheet having an inner face
  • said cutter block being reciprocated by said rocking lever urged by a spring towards said inner face of said shearing comb sheet
  • said cutter block being operatively connected with said driving pin by means of said guide bushing and said bearing member
  • a ram having an end face and disposed in the center of said bearing member, as well as projecting into the space dened between said pivot pins,
  • sail driving pin including a piston having a supporting ace
  • said piston is axially movable within said sleeve and spring-biased in the direction toward said opening of said sleeve.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)
US556510A 1965-06-10 1966-06-09 Dry shaver having a spring biased rocking lever to reciprocate a cutter block Expired - Lifetime US3389467A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEK0056343 1965-06-10
DEK0058625 1966-03-03

Publications (1)

Publication Number Publication Date
US3389467A true US3389467A (en) 1968-06-25

Family

ID=25984073

Family Applications (2)

Application Number Title Priority Date Filing Date
US556510A Expired - Lifetime US3389467A (en) 1965-06-10 1966-06-09 Dry shaver having a spring biased rocking lever to reciprocate a cutter block
US699230A Expired - Lifetime US3462833A (en) 1965-06-10 1968-01-19 Drive pin assembly for the cutter block of an electric razor

Family Applications After (1)

Application Number Title Priority Date Filing Date
US699230A Expired - Lifetime US3462833A (en) 1965-06-10 1968-01-19 Drive pin assembly for the cutter block of an electric razor

Country Status (6)

Country Link
US (2) US3389467A (de)
AT (1) AT278582B (de)
CH (1) CH450217A (de)
DE (2) DE1553741B1 (de)
GB (1) GB1140718A (de)
NL (1) NL147060B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3844034A (en) * 1972-01-25 1974-10-29 Krups Fa Robert Dry shaver
US3911573A (en) * 1972-09-30 1975-10-14 Krups Robert Dry shaver
US4038749A (en) * 1975-01-27 1977-08-02 Matsushita Electric Works Ltd. Electric dry shaver

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT398720B (de) * 1992-07-24 1995-01-25 Koninkl Philips Electronics Nv Rasierapparat mit einem scherkopfrahmen und einem an diesen angefederten folienrahmen

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2217519A (en) * 1938-02-09 1940-10-08 Art Metal Works Inc Shaving mechanism
US2245420A (en) * 1939-03-20 1941-06-10 Chris L Volz Cutter head for electric razors
US2264398A (en) * 1937-07-03 1941-12-02 Thomas J Murphy Dry shaving device
US2282539A (en) * 1938-08-25 1942-05-12 Casco Products Corp Shaving machine
US2337391A (en) * 1939-02-21 1943-12-21 Hartford Nat Bank & Trust Co Haircutting device
US2395495A (en) * 1943-07-05 1946-02-26 Thomas J Murphy Dry shaver
US2416776A (en) * 1944-10-23 1947-03-04 Schlotthauer Herman Shaver
US2434671A (en) * 1944-07-24 1948-01-20 Thomas J Murphy Electric reciprocating motor
DE821010C (de) * 1950-03-08 1951-11-15 Kurt Kube Scherkopf
US3133297A (en) * 1962-07-30 1964-05-19 Henry Windward Power operated toothbrush
US3158932A (en) * 1962-08-01 1964-12-01 Ivo H Brewer Multiple cutter shaver having continuous shaving surface
US3242569A (en) * 1963-09-13 1966-03-29 Philips Corp Dry shaver head biased by springs of unequal strength

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2133665A (en) * 1937-03-17 1938-10-18 Arthur C Leigh Electric razor
US2242752A (en) * 1938-05-04 1941-05-20 Art Metal Works Inc Shaving apparatus
FR1018411A (fr) * 1950-04-27 1953-01-07 Tondeuse électrique
DE952696C (de) * 1952-05-16 1956-11-22 Philips Nv Stapelbarer Behaelter aus Pappe mit an den Behaelterecken befestigten Stuetzen
DE925696C (de) * 1953-07-30 1955-03-28 Kurt Kube Scherkopf fuer elektrisch angetriebene Schergeraete

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2264398A (en) * 1937-07-03 1941-12-02 Thomas J Murphy Dry shaving device
US2217519A (en) * 1938-02-09 1940-10-08 Art Metal Works Inc Shaving mechanism
US2282539A (en) * 1938-08-25 1942-05-12 Casco Products Corp Shaving machine
US2337391A (en) * 1939-02-21 1943-12-21 Hartford Nat Bank & Trust Co Haircutting device
US2245420A (en) * 1939-03-20 1941-06-10 Chris L Volz Cutter head for electric razors
US2395495A (en) * 1943-07-05 1946-02-26 Thomas J Murphy Dry shaver
US2434671A (en) * 1944-07-24 1948-01-20 Thomas J Murphy Electric reciprocating motor
US2416776A (en) * 1944-10-23 1947-03-04 Schlotthauer Herman Shaver
DE821010C (de) * 1950-03-08 1951-11-15 Kurt Kube Scherkopf
US3133297A (en) * 1962-07-30 1964-05-19 Henry Windward Power operated toothbrush
US3158932A (en) * 1962-08-01 1964-12-01 Ivo H Brewer Multiple cutter shaver having continuous shaving surface
US3242569A (en) * 1963-09-13 1966-03-29 Philips Corp Dry shaver head biased by springs of unequal strength

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3844034A (en) * 1972-01-25 1974-10-29 Krups Fa Robert Dry shaver
US3911573A (en) * 1972-09-30 1975-10-14 Krups Robert Dry shaver
US4038749A (en) * 1975-01-27 1977-08-02 Matsushita Electric Works Ltd. Electric dry shaver

Also Published As

Publication number Publication date
GB1140718A (en) 1969-01-22
DE1553741B1 (de) 1970-04-16
DE1553743B1 (de) 1970-12-03
CH450217A (de) 1968-01-15
NL6607991A (de) 1966-12-12
AT278582B (de) 1970-02-10
US3462833A (en) 1969-08-26
NL147060B (nl) 1975-09-15

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ROBERT KRUPS STIFTUNG & CO., KG

Free format text: CHANGE OF NAME;ASSIGNOR:ROBERT KRUPS;REEL/FRAME:003933/0172

Effective date: 19810623