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US2928171A - Cutting head assembly for electric hair clippers - Google Patents

Cutting head assembly for electric hair clippers Download PDF

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Publication number
US2928171A
US2928171A US782893A US78289358A US2928171A US 2928171 A US2928171 A US 2928171A US 782893 A US782893 A US 782893A US 78289358 A US78289358 A US 78289358A US 2928171 A US2928171 A US 2928171A
Authority
US
United States
Prior art keywords
blade
spring
blades
movable blade
stationary
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
US782893A
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English (en)
Inventor
Oster John
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.)
John Oster Manufacturing Co
Original Assignee
John Oster Manufacturing Co
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 John Oster Manufacturing Co filed Critical John Oster Manufacturing Co
Priority to US782893A priority Critical patent/US2928171A/en
Priority to DEO6696A priority patent/DE1094152B/de
Priority to FR791297A priority patent/FR1219749A/fr
Priority to CH359060D priority patent/CH359060A/fr
Priority to GB15541/59A priority patent/GB856396A/en
Priority to BE580894A priority patent/BE580894A/fr
Application granted granted Critical
Publication of US2928171A publication Critical patent/US2928171A/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
    • B26B19/02—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers of the reciprocating-cutter type
    • B26B19/04—Cutting heads therefor; Cutters therefor; Securing equipment thereof
    • B26B19/06—Cutting heads therefor; Cutters therefor; Securing equipment thereof involving co-operating cutting elements both of which have shearing teeth

Definitions

  • This invention relates to"- le'c'trie' hair” clipper yand refers more particularly-to improvements'in cutting-head assemblies for such electric clippers:
  • the movable blade of the cutting head flatwis'e overlies the stationary'blade and is reciprocated remade t'o 'si'de relative to the stationary blade by means ota drivingrlever actuated by the electrictrn'oto'r' in the body of the clipper.
  • the movable blad'e- - is pressed flatwise against the stationary blade by'm'eans of 'a-s'pring member secured to the stationary blade a'nd'forming a part of V the detachable cutting head.
  • Figure 1 is aside elevational view often electric hair clipper having a cutting head, embodying" the principles of t i en ion;
  • Figure 4 is a perspective view of a cutting head spring m'emberembodying the principles of this invention. 7
  • Figure 5 is a graph showing how little the force exerted by the spring member of this invention, illustrated at the bottom of this view, varies with change in the extent of its flexure; and i l i F gu e a is a aph- Figureil is. a verticalsectional. yiew taken on the plane similar to Figure 5 but showing how -rnuch'more the forcetofthe spring member in the conventional lprior vcutting heads, illustrated at the bottom of the figure, varied with-change in the extent oflflexure.
  • the. numeral 5 designates generally an electric hairclippercomprising .a body 6 which provides botha handlefor thecliPPfliand a ..ho. using for itsmotor, not W l ,r'em bl annua Patented Mar. 15,1960
  • the cutting head includes a spring member .13 which is secured to the stationary blade and presses down upon the movable blade.
  • the cutting head is, of course, held in'its operative position illustrated in Figure 1.
  • the front end of the lever 10 is engaged between a pair of hardened wear shoes 18 on the movable blade, o'neat each side-of a rearwardly opening notch 20 therein, so that the lever can impart reciprocating side-to-side motionto the movable blade as thelever is oscillated by the motor.
  • Patents Nos. 1,888,688 and 2,182,597 contain more specific disclosures of a structure similar to thatwhich has been described in general terms up to this point.
  • the spring employed to ho'ld the blades together has been of the simple leaf spring type mounted cantilever fashion, though in plan it was substantially U-shaped with short, slightly curved legs providing the spring blades or leaves. The ends of these short blades or leaves were connected by the bight portion of the U which overlay and press against the movable blade. In cross section the bight portionwas shaped to provide a downwardly facing ridge which engaged in a generally V-shaped groove in the top face of the movable blade to constrain the same to straight line side-to-side motion, it being understood that the ends of the legs of this spring member were fixed to the stationary blade.
  • This is the structure shown in the aforesaid Patent No..l,888,688, and illustrated in Figure 6 where it is designated by the referencecharacter S. 1
  • Figure 6 also illustrates the deficiency of this prior type of spring member. Because of the shortness of the spring blades provided by its legs, a very slight deflection of the legs produced a very substantial change'in the force which the spring member exerted against the movable blade. Moreover, a group of such spring members, made as nearly identical as possible by normal production methods, would vary widely in stiffness from unit to unit, due to slight variations in metal thickness, temper, and other factors. stifiest and least stiff units in a'normalfgroup of such springs are depicted by the lines designated Force "Range in Figure 6.
  • the spring member 13 comprises a pair of identical leaf springs 22 each doubled upon itself into a looped or substantially U-shaped formation having a short inner leg 23 which is fastened to the stationary blade, a longer outer leg 24 and an arcuate bend or medial portion 25 connecting the inner and outer legs.
  • These two leaf springs are connected at the free ends of their outer legs 24, by a cross bar 26, and preferably the two leaf springs and their connecting cross bar are one integral stamping of hard Phosphor bronze or similar metal.
  • the spring member of this invention like its predecessor isthus generally U-shaped in plan, and the cross bar 26 which forms the bight of the U is so shaped in cross section that it provides a downwardly facing straight ridge 27. This ridge engages in a V-shaped groove 28 in the top face of the movable blade to guide and constrain the same to straight line reciprocating motion parallel to its cutting edge.
  • the securement ofthes-pring member to the stationary blade is exceptionally rigid by virtue of the fact that the short inner legs of its two leaf springs are clamped between the stationary blade and the end portions of the socket forming strap 16.; Screws 38 which pass through the stationary blade from the underside thereof, and through the innerlegs of the leaf springs are. threaded into tapped holes in the strap to secure these parts together'.
  • the medial portion 31 of the strap is held spaced from the outer face of the stationary blade by the interposed inner legs of the leafsprings so that the inner legs cooperate with the strap and the stationary blade in defining the tongue receiving socket, but preferably the medial portion of the strap is outwardly offset, as shown, to increase the size of the socket.
  • leaf springs 22 have a compound spring action. They function not only as ordinary cantilever mounted leaf springs, but also have the action characteristic of a torsion spring, since the bends 25 which connect their legs are in fact semi-torsion springs. It should also be noted that the anchored ends of the long outer legs 24 are spaced a substantial distance above the top face of the stationary blades to which the short inner legs are clamped. As a result, the points from which the outer legs act to' press down upon the movable blade are higher than they were before so that more of the spring force applied to the movable blade is exactly downward, and practically none ofv it acts horizontally, i.e. in the plane of the blades.
  • spring means urging the two blades flatwise toward one another and also readily removably locating the movable blade upon the stationary blade, said spring means comprising: a pair of substantially identical leaf springs each doubled upon itself into a Ueshaped formation with a short inner leg and a longer' outer leg overlying but spaced from the inner leg and connected thereto by an arcuate bend so that the outer leg may be flexed toward as well as from the.
  • a cutting head for electric hair clippers comprising: cooperating stationary and movable blades in flatwise overlying engagement; spring means clamping said blades flatwise together and holding them in predetermined cooperative relationship, said spring means being an integral stamping formed to have a pair of leaf springs each doubled upon itself to provide a short inner leg and a longer outer leg overlying but spaced from the inner leg and connected thereto by a curved bend, and a cross bar connecting the extremities of the longer outer legs a of the two leaf springs; means securing the short inner legs of both leaf springs directly to the top of the sta-' tionary blade with the ends of the inner legs directly behind the movable blade and at a level below the top of the movable blade, the cross bar pressing down upon the top of the movable blade; and slidin'gly interengaging guide means on the cross bar and the movable blade constraining the movable bladeto lateral reciprocation.
  • a motor driven hair clipper of the type having cooperating stationary and movable blades with toothed front cutting edges, and wherein the movable blade flatwise overlies the stationary blade and is reciprocable laterally relative to thestationary blade
  • a cross bar connecting the free ends of the longer outer legs of the two spring leaves, overlying and pressing down upon the movable blade; and slidingly interengaging guide means on the cross bar and the movable blade constraining the movable blade to lateral reciprocation with its cutting edge in a predetermined posi-' tion with respect to that of the stationary blade.
  • the motor driven hair clipper of claim 3 further characterized by a strap having end portions overlying the inner legs of said spring leaves and held spaced from the adjacent face of the stationary blade by them, said strap cooperating with the inner legs of the spring leaves and with the adjacent face of the stationary blade to define V a socket in which a tongue is engageable for mounting the blade assembly on a clipper.
  • a motor'driven hair clipper of the type having cooperating stationary and movable blades with toothed front edges, and wherein the movable blade flatwise overlies the stationary blade and is laterally reciprocable relative thereto, means defining the relative positions of the toothed front edges of the blades and urging the two blades flatwise toward one another, said means'compris ing: a pair of substantially U-shaped spring leaves, each having a short inner leg and a longer outer leg; means securing the short inner leg of each spring leaf flatwise to the top of the stationary blade, behind the movable blade, and with the bight portion of the spring leaf rearmost, so that its longer outer leg projects toward the front cutting edges of the blades; a crossbar connecting the outer ends of said longer legs of the two spring leaves and bearing upon the movable blade with a force de pendent upon the extent the spring leaves are flexed by the insertion of the movable blade between the cross bar and the stationary blade, the U-shaped form of the spring leaves providing them with substantial

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)
US782893A 1958-12-24 1958-12-24 Cutting head assembly for electric hair clippers Expired - Lifetime US2928171A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US782893A US2928171A (en) 1958-12-24 1958-12-24 Cutting head assembly for electric hair clippers
DEO6696A DE1094152B (de) 1958-12-24 1959-03-28 Schneidkopf fuer elektrische Haarschneidemaschinen
FR791297A FR1219749A (fr) 1958-12-24 1959-04-06 Tête de tondeuse électrique
CH359060D CH359060A (fr) 1958-12-24 1959-04-07 Tondeuse à moteur électrique
GB15541/59A GB856396A (en) 1958-12-24 1959-05-06 Improvements in cutting head assemblies for electrically operated hair clippers
BE580894A BE580894A (fr) 1958-12-24 1959-07-20 Tête de tondeuse électrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US782893A US2928171A (en) 1958-12-24 1958-12-24 Cutting head assembly for electric hair clippers

Publications (1)

Publication Number Publication Date
US2928171A true US2928171A (en) 1960-03-15

Family

ID=25127517

Family Applications (1)

Application Number Title Priority Date Filing Date
US782893A Expired - Lifetime US2928171A (en) 1958-12-24 1958-12-24 Cutting head assembly for electric hair clippers

Country Status (6)

Country Link
US (1) US2928171A (fr)
BE (1) BE580894A (fr)
CH (1) CH359060A (fr)
DE (1) DE1094152B (fr)
FR (1) FR1219749A (fr)
GB (1) GB856396A (fr)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3052025A (en) * 1961-06-23 1962-09-04 Donald D Ring Tension adjuster for clipper heads
US3233324A (en) * 1961-11-16 1966-02-08 Philips Corp Blade set-removing devices for hair clippers in particular for hair clippers to be combined with electrical shaving apparatus
US3242570A (en) * 1962-07-04 1966-03-29 Philips Corp Blade tension means for hair clipper blades
US3747212A (en) * 1970-09-09 1973-07-24 Aesculap Werke Ag Cutterhead unit for hair clipper
US4563814A (en) * 1984-01-11 1986-01-14 John Trichell Disposable clipper head
US4899444A (en) * 1988-05-16 1990-02-13 Trichell John M Disposable clipper head and method for making the same
US4989324A (en) * 1989-05-11 1991-02-05 Andis Company Hair clipper blade set
EP0447131A2 (fr) * 1990-03-08 1991-09-18 Wahl Clipper Corporation Unité de lames pour tondeuse électrique à cheveux
US5092048A (en) * 1990-10-11 1992-03-03 Andis Company Cutting head assembly for hair trimmers
US5230153A (en) * 1990-10-11 1993-07-27 Andis Company Mounting bracket for hair trimmers
US5386634A (en) * 1993-06-02 1995-02-07 Sunbeam Corporation Means for preventing the interchanging of cutting head assemblies with unsuitable clipper bodies and vice versa
USD421818S (en) * 1996-12-20 2000-03-21 Sunbeam Products, Inc. Hair trimmer
US6742262B2 (en) 2001-04-09 2004-06-01 Conair Corporation Detachable and adjustable blade assembly
US20050011076A1 (en) * 2003-07-17 2005-01-20 Andis Company Ceramic movable blades for blade sets of hair clippers
US20060037556A1 (en) * 2000-05-30 2006-02-23 Porter Angela L Pet grooming tool and method for removing loose hair from a furry pet
US20110061241A1 (en) * 2009-09-17 2011-03-17 Jheng-Mau Jian Pressure adjustable knife set for electromotive hair cutter
US20110289777A1 (en) * 2010-05-28 2011-12-01 Rovcal, Inc. Electric hand-held hair cutting appliance with blade clamping device
US8732893B2 (en) 2001-05-17 2014-05-27 Petgroom Tech Llc Method for removing hair from a hand-held grooming tool
US20140338199A1 (en) * 2013-05-16 2014-11-20 Wahl Clipper Corporation Drive assembly for hair trimmers
CN104999485A (zh) * 2015-08-20 2015-10-28 珠海新秀丽家居用品有限公司 具有超薄定刀的新型个人护理修剪器
US20190232509A1 (en) * 2014-09-17 2019-08-01 Andis Company Blade Assembly Having Entrapped Spring
US10850407B2 (en) 2014-09-17 2020-12-01 Andis Company Blade assembly having entrapped spring

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1956042A (en) * 1931-11-27 1934-04-24 Oster Mfg Co John Hair clipper
US2182597A (en) * 1938-01-13 1939-12-05 Oster John Mfg Co Hair clipper
US2484610A (en) * 1945-09-25 1949-10-11 Cromonic Joseph Double cutter hair clipper
DE828208C (de) * 1950-06-29 1952-01-17 Bosch Gmbh Robert Messerkopf fuer Haarschneidemaschinen
CH324006A (de) * 1954-01-21 1957-08-31 Bosch Gmbh Robert Messerkopf für Haarschneidemaschinen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1888688A (en) * 1930-08-25 1932-11-22 Oster John Mfg Co Unitary cutting assembly for hair clippers

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1956042A (en) * 1931-11-27 1934-04-24 Oster Mfg Co John Hair clipper
US2182597A (en) * 1938-01-13 1939-12-05 Oster John Mfg Co Hair clipper
US2484610A (en) * 1945-09-25 1949-10-11 Cromonic Joseph Double cutter hair clipper
DE828208C (de) * 1950-06-29 1952-01-17 Bosch Gmbh Robert Messerkopf fuer Haarschneidemaschinen
CH324006A (de) * 1954-01-21 1957-08-31 Bosch Gmbh Robert Messerkopf für Haarschneidemaschinen

Cited By (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3052025A (en) * 1961-06-23 1962-09-04 Donald D Ring Tension adjuster for clipper heads
US3233324A (en) * 1961-11-16 1966-02-08 Philips Corp Blade set-removing devices for hair clippers in particular for hair clippers to be combined with electrical shaving apparatus
US3242570A (en) * 1962-07-04 1966-03-29 Philips Corp Blade tension means for hair clipper blades
US3747212A (en) * 1970-09-09 1973-07-24 Aesculap Werke Ag Cutterhead unit for hair clipper
US4563814A (en) * 1984-01-11 1986-01-14 John Trichell Disposable clipper head
US4899444A (en) * 1988-05-16 1990-02-13 Trichell John M Disposable clipper head and method for making the same
US4989324A (en) * 1989-05-11 1991-02-05 Andis Company Hair clipper blade set
EP0447131A2 (fr) * 1990-03-08 1991-09-18 Wahl Clipper Corporation Unité de lames pour tondeuse électrique à cheveux
EP0447131A3 (en) * 1990-03-08 1991-11-06 Wahl Clipper Corporation Blade assembly for electrical hair clippers
US5092048A (en) * 1990-10-11 1992-03-03 Andis Company Cutting head assembly for hair trimmers
US5230153A (en) * 1990-10-11 1993-07-27 Andis Company Mounting bracket for hair trimmers
US5386634A (en) * 1993-06-02 1995-02-07 Sunbeam Corporation Means for preventing the interchanging of cutting head assemblies with unsuitable clipper bodies and vice versa
EP0934806A1 (fr) 1993-06-02 1999-08-11 Sunbeam Corporation Dispositifs de coupe pour tondeuse électrique
USD421818S (en) * 1996-12-20 2000-03-21 Sunbeam Products, Inc. Hair trimmer
US7222588B2 (en) 2000-05-30 2007-05-29 Furminator, Inc. Pet grooming tool and method for removing loose hair from a furry pet
US20070119383A1 (en) * 2000-05-30 2007-05-31 Furminator, Inc. Pet Grooming Tool and Method for Removing Loose Hair from a Furry Pet
US7509926B2 (en) 2000-05-30 2009-03-31 Furminator, Inc. Pet grooming tool and method for removing loose hair from a furry pet
US20080178822A1 (en) * 2000-05-30 2008-07-31 Furminator, Inc. Pet Grooming Tool and Method for Removing Loose Hair from a Furry Pet
US20060037556A1 (en) * 2000-05-30 2006-02-23 Porter Angela L Pet grooming tool and method for removing loose hair from a furry pet
US7334540B2 (en) 2000-05-30 2008-02-26 Furminator, Inc. Pet grooming tool and method for removing loose hair from a furry pet
US6742262B2 (en) 2001-04-09 2004-06-01 Conair Corporation Detachable and adjustable blade assembly
US9992973B2 (en) 2001-05-17 2018-06-12 Petgroom Tech Llc Vacuum grooming tool
US8918955B2 (en) 2001-05-17 2014-12-30 Petgroom Tech Llc Vacuum grooming tool
US8732893B2 (en) 2001-05-17 2014-05-27 Petgroom Tech Llc Method for removing hair from a hand-held grooming tool
WO2005009169A3 (fr) * 2003-07-17 2005-10-27 Andis Co Lames mobiles en ceramique pour jeu de lames de tondeuses a cheveux
WO2005009169A2 (fr) * 2003-07-17 2005-02-03 Andis Company Lames mobiles en ceramique pour jeu de lames de tondeuses a cheveux
US7080458B2 (en) * 2003-07-17 2006-07-25 Andis Company Ceramic movable blades for blade sets of hair clippers
US20050011076A1 (en) * 2003-07-17 2005-01-20 Andis Company Ceramic movable blades for blade sets of hair clippers
US20110061241A1 (en) * 2009-09-17 2011-03-17 Jheng-Mau Jian Pressure adjustable knife set for electromotive hair cutter
US20110289777A1 (en) * 2010-05-28 2011-12-01 Rovcal, Inc. Electric hand-held hair cutting appliance with blade clamping device
US8453333B2 (en) * 2010-05-28 2013-06-04 Rovcal, Inc. Electric hand-held hair cutting appliance with blade clamping device
US20140338199A1 (en) * 2013-05-16 2014-11-20 Wahl Clipper Corporation Drive assembly for hair trimmers
US9242385B2 (en) * 2013-05-16 2016-01-26 Wahl Clipper Corporation Drive assembly for hair trimmers
US20190232509A1 (en) * 2014-09-17 2019-08-01 Andis Company Blade Assembly Having Entrapped Spring
US10850407B2 (en) 2014-09-17 2020-12-01 Andis Company Blade assembly having entrapped spring
US11014253B2 (en) * 2014-09-17 2021-05-25 Andis Company Blade assembly having entrapped spring
US11534931B2 (en) 2014-09-17 2022-12-27 Andis Company Blade assembly having entrapped spring
US11752648B2 (en) 2014-09-17 2023-09-12 Andis Company Blade assembly having entrapped spring
US12194646B2 (en) 2014-09-17 2025-01-14 Andis Company Blade assembly having entrapped spring
CN104999485A (zh) * 2015-08-20 2015-10-28 珠海新秀丽家居用品有限公司 具有超薄定刀的新型个人护理修剪器

Also Published As

Publication number Publication date
CH359060A (fr) 1961-12-15
FR1219749A (fr) 1960-05-19
GB856396A (en) 1960-12-14
BE580894A (fr) 1959-11-16
DE1094152B (de) 1960-12-01

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