US3685150A - Double edge safety razor embodying flexible blade pressure control - Google Patents

Double edge safety razor embodying flexible blade pressure control Download PDF

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Publication number
US3685150A
US3685150A US58539A US3685150DA US3685150A US 3685150 A US3685150 A US 3685150A US 58539 A US58539 A US 58539A US 3685150D A US3685150D A US 3685150DA US 3685150 A US3685150 A US 3685150A
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US
United States
Prior art keywords
blade
pressure
razor
handle
skin
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
US58539A
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English (en)
Inventor
Frederick L Risher
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.)
Philip Morris USA Inc
Original Assignee
Philip Morris USA Inc
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Filing date
Publication date
Application filed by Philip Morris USA Inc filed Critical Philip Morris USA Inc
Application granted granted Critical
Publication of US3685150A publication Critical patent/US3685150A/en
Assigned to BANKERS TRUST COMPANY A NEW YORK BANKING CORPORATION reassignment BANKERS TRUST COMPANY A NEW YORK BANKING CORPORATION SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AMERICAN SAFETY RAZOR COMPANY
Assigned to AMERICAN SAFETY RAZOR COMPANY reassignment AMERICAN SAFETY RAZOR COMPANY RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). RECORDED AT REEL 4324, FRAMES 601 AND REEL 4888, FRAMES 485. Assignors: BANKERS TRUST COMPANY, AS AGENT
Anticipated expiration legal-status Critical
Assigned to FIRST NATIONAL BANK OF BOSTON, THE reassignment FIRST NATIONAL BANK OF BOSTON, THE SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AMERICAN SAFETY RAZOR COMPANY, A DE CORP.
Assigned to AMERICAN SAFETY RAZOR COMPANY reassignment AMERICAN SAFETY RAZOR COMPANY TERMINATION OF SECURITY INTEREST IN PATENTS Assignors: FIRST NATIONAL BANK OF BOSTON, THE, AS AGENT
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
    • B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
    • B26B21/08—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor involving changeable blades
    • B26B21/14—Safety razors with one or more blades arranged transversely to the handle
    • B26B21/18—Safety razors with one or more blades arranged transversely to the handle involving blades with two cutting edges

Definitions

  • a floating head is herein defined as a blade support assembly which is mounted for movement transverse to the path of movement undergone by the pressure guard.
  • a double edge safety razor utilizing a floating 1 head construction of the type herein described for use with double edge blades is insensitive not only to variations in the application of handle pressure but also to other skin aberrations which tend to increase blade pressure.
  • a biased double edge blade support assembly comprising the floating head, is mounted for controlled pivotal movement toward and away from two skin pressure guards positioned on opposite sides of the razor and integral with the razor handle whereby the principle of the floating head maintains with either of the opposed blade edges.
  • This construction permits a constant -'blade pressure to be exerted on the skin irrespective of which blade edge is in use or the pressure which is exerted on the handle and skin engaging pressure guard.
  • the pressure guards are rigidly secured to the handle and occupy the same positions relative thereto as do'the pressure guards of a conventional double edge safety razor.
  • the blade support assembly is pivotally mounted on the handle assembly to support the blade in overlying relationship to the fixed pressure guards for limited movement of each blade edge toward and away from its respective underlying pressure guard.
  • the blade support assembly may be pivotally mounted directly on the handle structure and, in a preferred form, has a portion thereof including the pivot structure and biasing means telescopically enclosed within a hollow handle whereby the conventional appearance of the razor is maintained. Any desired biasing means such as a coil spring, leaf spring, mass of rubber or the like may be provided to effect the desired biasing force.
  • the blade support assembly is normally biased to a position centering the double edge blade in relation to the fixed pressure guards to define a conventional blade angle positionment of either edge relative to its respective fixed guard.
  • the strength of the biasing force is, desirably, adjustable to take into account individual variables as regards toughness of beard, skin sensitivity, etc.
  • FIG. 1 is a perspective view of a double edge safety razor embodying a floating head
  • FIG. 2 is an exploded perspective of the same with a portion of the blade support assembly broken away;
  • FIG. 3 is a sectional view taken along the line 33 of FIG. 1;
  • FIG. 4 is a sectional view taken along line 4-4 of FIG. 3;
  • FIG. 5 is a side elevational view illustrating the centralized position of the floating head in normal shaving position.
  • FIG. 6 is a side elevational view illustrating an exaggerated displaced position of the floating head.
  • the safety razor 10 comprises a handle assembly 12 including opposed generally conventional skin pressure guards 14, 16 integrally joined with a handle portion 18 within the hollow interiorof which is pivoted the lower end of a blade support assembly 20 for limited pivotal movement about pivot pin 22 in opposition to the bias of tension spring 24 interconnecting the tail portion 26 of blade support assembly 20 and anchor stud 28 threadedly interconnected with a bias adjusting plug 30 bottomed on the shoulders of flange 32 within handle 18.
  • skin pressure guards 14,16 are joined by a web 34 which is rigidly interconnected with handle 18 by yoke structure 36.
  • Blade support assembly 20 includes a generally conventional blade supporting head 38 having a conventional blade clamping assembly including a center bar 40, cross arms 42 and cap members 44 to clamp and release a conventional double edge blade 46 in the usual manner upon rotation of the knurled sleeve 48 to advance or retract spider 50 underlying the clamping assembly.
  • Sleeve 48 is threadedly engaged with an intermediate portion 52 of the blade support assembly for the usual axial adjustment relative thereto.
  • FIGS. 1, 3 and 4 is illustrated the central positionment of blade support assembly 20 relative to handle assembly 12.
  • FIG. 5 A similar positionment is shown in FIG. 5 wherein the skin surface being shaved is schematically illustrated at 54 and the torque applied to the blade support assembly by the application of handle pressure as indicated at 56, tending to pivot the same about the axis of pivot pin 22, does not exceed the bias imposed by spring 24.
  • blade 46 is centrally positioned above skin pressure guards 14, 16 and assumes a normal angle of attack with respect to skin surface 54.
  • FIG. 5 Under the shaving conditions illustrated in FIG.
  • razor 10 functions as a conventional razor since the floating action of head 38 does not come into play until the blade pressure against skin surface 54, tending to rotate the blade support assembly clockwise about pivot 22 as viewed in FIG. 5, exceeds the counter-rotating bias applied thereto by spring 24.
  • the floating head action becomes effective immediately upon the application of that blade pressure against the skin which exceeds the maximum safe cutting pressure as determined by the adjustment of plug 30 to vary the tension of spring 24. This latter condition is illustrated in FIG. 6
  • the manner in which the razor may be assembled from its component parts willbe apparent from an inspection of FIGS. 2 and 3.
  • the tail portion 26 of the blade support assembly with its interconnected spring 24 and stud 28 are inserted through a central opening 60 in web 34 and into the hollow interior of handle 18.
  • Stud 28 is generally rectangular in cross section and extends through a similarly shaped opening 62 circumscribed by the flange 32 formed in handle 18.
  • Pin 22 is theninserted through openings 64 formed in handle 18 and corresponding bore 66 in blade support assembly 20.
  • Plug 30 is then inserted at the lower end of the handle and rotated to draw stud 28 into threaded bore 68 until the desired tension is established in spring 24.
  • the razor is now ready for use in the manner described and insures that the application of blade pressure to the skin is a function of pre-established spring tension rather than applied handle pressure.
  • guards 70 which are a part of the floating head, are not required for the practice of the invention, they do contribute to increased shaving comfort and are desirably utilized to facilitate manufacturing since the floating head itself, including guards 70, may be purchased separately from conventional razor manufactures and modified in accordance with the aforedescribed floating head concept.
  • a double edge safety razor comprising; a handle assembly including opposed skin pressure guards; a blade support assembly for mounting the opposed edges of a double edge blade in parallel juxtaposed relation to the corresponding opposed pressure guards; and means mounting said blade supportassembly on said handle assembly for floating movement of said blade edges transversely of the pressure guards.
  • the razor of claim 1 including means for biasing said blade into a central positionment relative to said pressure guards.
  • said blade support assembly includes a blade clamping head and manual actuating means for clamping and unclamping a blade.
  • said handle assembly includes an elongate hollow handle, said blade support assembly including an integral elongate extension extending into said'hollow handle; and said first named means including pivot means interconnecting. said handle and elongate extension to define an arcuate path of floating movement for said blade edges relative to said pressure guards.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)
  • Knives (AREA)
US58539A 1970-07-27 1970-07-27 Double edge safety razor embodying flexible blade pressure control Expired - Lifetime US3685150A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US5853970A 1970-07-27 1970-07-27
FR7126514A FR2103692A6 (enrdf_load_stackoverflow) 1970-07-27 1971-07-20

Publications (1)

Publication Number Publication Date
US3685150A true US3685150A (en) 1972-08-22

Family

ID=26216530

Family Applications (1)

Application Number Title Priority Date Filing Date
US58539A Expired - Lifetime US3685150A (en) 1970-07-27 1970-07-27 Double edge safety razor embodying flexible blade pressure control

Country Status (7)

Country Link
US (1) US3685150A (enrdf_load_stackoverflow)
BE (1) BE770348R (enrdf_load_stackoverflow)
CA (1) CA962830A (enrdf_load_stackoverflow)
CH (1) CH535635A (enrdf_load_stackoverflow)
DE (1) DE2137346C3 (enrdf_load_stackoverflow)
FR (1) FR2103692A6 (enrdf_load_stackoverflow)
GB (1) GB1318485A (enrdf_load_stackoverflow)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3935639A (en) * 1973-03-01 1976-02-03 The Gillette Company Safety razor
US3938247A (en) * 1974-03-05 1976-02-17 The Gillette Company Shaving system with pivotal head
US3950848A (en) * 1974-03-18 1976-04-20 Michael Goldstein Safety razor
US4168571A (en) * 1977-02-02 1979-09-25 The Gillette Company Shaving unit
US4270268A (en) * 1979-12-07 1981-06-02 The Gillette Company Razor blade assembly
US4288920A (en) * 1979-11-13 1981-09-15 The Gillette Company Shaving system with pivotally mounted razor cartridge
EP0045879A1 (en) * 1980-08-07 1982-02-17 The Gillette Company Razor blade assembly
US4378633A (en) * 1979-12-07 1983-04-05 The Gillette Company Razor blade assembly
EP0106773A1 (fr) * 1982-10-05 1984-04-25 Kis Photo Industrie Dispositif perfectionné pour le tirage et le développement simultanés de photographies
US4879811A (en) * 1987-10-01 1989-11-14 Cooney Daniel J Safety razor
US5206995A (en) * 1991-09-19 1993-05-04 Bosik Min Safety razor
WO2005090021A3 (en) * 2004-03-11 2006-06-01 Gillette Co Shaving system
US20100132204A1 (en) * 2008-12-03 2010-06-03 Threshold Capital, Inc. Razor with independent suspension
AU2011202738B2 (en) * 2004-03-11 2011-09-08 The Gillette Company Llc Shaving system
US20160158949A1 (en) * 2014-12-08 2016-06-09 The Gillette Company Razor Cartridge Guard Structure
US20160158948A1 (en) * 2014-12-08 2016-06-09 The Gillette Company Razor Cartridge Guard Structure
EP3388211A1 (en) * 2017-04-13 2018-10-17 BIC-Violex S.A. Razor handles
US20210394383A1 (en) * 2014-03-05 2021-12-23 Mack-Ray Inc. Dual sided razor
US11325273B1 (en) * 2020-01-16 2022-05-10 Blazor, LLC Adjustable head razor
US20220168913A1 (en) * 2019-03-29 2022-06-02 Edgewell Personal Care Brands, Llc Safety razor and handle for a safety razor
US11759227B2 (en) * 2019-02-15 2023-09-19 Church & Dwight Co., Inc. Dermaplaning device and related system
USD1025484S1 (en) 2021-10-29 2024-04-30 Church & Dwight Co., Inc. Hair removal device
USD1042965S1 (en) 2022-05-19 2024-09-17 Church & Dwight Co., Inc. Hair removal device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4152828A (en) * 1978-03-29 1979-05-08 Lund Lloyd W Razor having variable angle and tilt of its blade

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3935639A (en) * 1973-03-01 1976-02-03 The Gillette Company Safety razor
US3938247A (en) * 1974-03-05 1976-02-17 The Gillette Company Shaving system with pivotal head
US3950848A (en) * 1974-03-18 1976-04-20 Michael Goldstein Safety razor
US4168571A (en) * 1977-02-02 1979-09-25 The Gillette Company Shaving unit
US4288920A (en) * 1979-11-13 1981-09-15 The Gillette Company Shaving system with pivotally mounted razor cartridge
US4270268A (en) * 1979-12-07 1981-06-02 The Gillette Company Razor blade assembly
US4378633A (en) * 1979-12-07 1983-04-05 The Gillette Company Razor blade assembly
EP0045879A1 (en) * 1980-08-07 1982-02-17 The Gillette Company Razor blade assembly
EP0106773A1 (fr) * 1982-10-05 1984-04-25 Kis Photo Industrie Dispositif perfectionné pour le tirage et le développement simultanés de photographies
US4879811A (en) * 1987-10-01 1989-11-14 Cooney Daniel J Safety razor
US5206995A (en) * 1991-09-19 1993-05-04 Bosik Min Safety razor
AU2011202738B2 (en) * 2004-03-11 2011-09-08 The Gillette Company Llc Shaving system
US7168173B2 (en) 2004-03-11 2007-01-30 The Gillette Company Shaving system
WO2005090021A3 (en) * 2004-03-11 2006-06-01 Gillette Co Shaving system
US20100132204A1 (en) * 2008-12-03 2010-06-03 Threshold Capital, Inc. Razor with independent suspension
US8671577B2 (en) * 2008-12-03 2014-03-18 Thomas A. Brown Razor with independent suspension
US20210394383A1 (en) * 2014-03-05 2021-12-23 Mack-Ray Inc. Dual sided razor
US20160158949A1 (en) * 2014-12-08 2016-06-09 The Gillette Company Razor Cartridge Guard Structure
US20160158948A1 (en) * 2014-12-08 2016-06-09 The Gillette Company Razor Cartridge Guard Structure
CN110312600A (zh) * 2017-04-13 2019-10-08 比克维奥莱克斯公司 剃刀手柄
WO2018189233A1 (en) * 2017-04-13 2018-10-18 Bic-Violex Sa Razor handles
EP3388211A1 (en) * 2017-04-13 2018-10-17 BIC-Violex S.A. Razor handles
CN110312600B (zh) * 2017-04-13 2022-02-01 比克维奥莱克斯公司 剃刀手柄
US11413777B2 (en) 2017-04-13 2022-08-16 BIC Violex Single Member S.A. Razor handles
US11759227B2 (en) * 2019-02-15 2023-09-19 Church & Dwight Co., Inc. Dermaplaning device and related system
US20220168913A1 (en) * 2019-03-29 2022-06-02 Edgewell Personal Care Brands, Llc Safety razor and handle for a safety razor
US11325273B1 (en) * 2020-01-16 2022-05-10 Blazor, LLC Adjustable head razor
US11597111B1 (en) * 2020-01-16 2023-03-07 Blazor, LLC Adjustable head razor
USD1025484S1 (en) 2021-10-29 2024-04-30 Church & Dwight Co., Inc. Hair removal device
USD1042965S1 (en) 2022-05-19 2024-09-17 Church & Dwight Co., Inc. Hair removal device

Also Published As

Publication number Publication date
GB1318485A (en) 1973-05-31
BE770348R (fr) 1971-12-01
AU3164171A (en) 1973-02-01
CA962830A (en) 1975-02-18
CH535635A (de) 1973-04-15
DE2137346A1 (enrdf_load_stackoverflow) 1972-02-03
DE2137346C3 (de) 1978-07-27
DE2137346B2 (de) 1977-12-08
FR2103692A6 (enrdf_load_stackoverflow) 1972-04-14

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Legal Events

Date Code Title Description
AS Assignment

Owner name: BANKERS TRUST COMPANY A NEW YORK BANKING CORPORATI

Free format text: SECURITY INTEREST;ASSIGNOR:AMERICAN SAFETY RAZOR COMPANY;REEL/FRAME:004324/0601

Effective date: 19840709

AS Assignment

Owner name: AMERICAN SAFETY RAZOR COMPANY

Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:BANKERS TRUST COMPANY, AS AGENT;REEL/FRAME:005351/0018

Effective date: 19890413

AS Assignment

Owner name: FIRST NATIONAL BANK OF BOSTON, THE

Free format text: SECURITY INTEREST;ASSIGNOR:AMERICAN SAFETY RAZOR COMPANY, A DE CORP.;REEL/FRAME:005385/0278

Effective date: 19890414

AS Assignment

Owner name: AMERICAN SAFETY RAZOR COMPANY, VIRGINIA

Free format text: TERMINATION OF SECURITY INTEREST IN PATENTS;ASSIGNOR:FIRST NATIONAL BANK OF BOSTON, THE, AS AGENT;REEL/FRAME:007919/0324

Effective date: 19950803