US3793725A - Adjustable safety razor - Google Patents

Adjustable safety razor Download PDF

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Publication number
US3793725A
US3793725A US00289031A US3793725DA US3793725A US 3793725 A US3793725 A US 3793725A US 00289031 A US00289031 A US 00289031A US 3793725D A US3793725D A US 3793725DA US 3793725 A US3793725 A US 3793725A
Authority
US
United States
Prior art keywords
cam
engagement
guard
blade
cam follower
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
US00289031A
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English (en)
Inventor
J Dawidowicz
F Ferraro
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.)
Warner Lambert Co LLC
Original Assignee
Warner Lambert Co LLC
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 Warner Lambert Co LLC filed Critical Warner Lambert Co LLC
Application granted granted Critical
Publication of US3793725A publication Critical patent/US3793725A/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
    • 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
    • B26B21/16—Safety razors with one or more blades arranged transversely to the handle involving blades with only one cutting edge

Definitions

  • the present invention relates to safety razors of the type shown in U.S. Pat. No. 3,203,093 in which single cutting edge blades are adapted to be inserted into the head of a razor from a blade-filled magazine. More particularly, the present invention relates to an adjustable single cutting edge blade razor having an adjustable blade guard surface forchanging the shave angle of the razor.
  • Safety razors of the type described in U.S. Pat. No. 3,203,093 provide for adjusting the shave angle of the razor to give a user an option to obtain a relative degree of closeness.
  • the cutting edge of the blade typically remains exposed and thus presents an opportunity for personal injury or damage to the blade.
  • an improvement to a safety razor comprising I means for releasably engaging a single cutting edge blade in a shaving position, and a guard member pivotally mounted with respect to the engaging means.
  • the guard member includes a transverse guard surface at a forward upper end thereof and a cam follower portion.
  • a cam is provided for engaging the cam follower portion, and biasing means bias the cam follower into abutting engagement with the cam, whereby adjustment of the cam moves the guard surface with respect to the cutting edge of the blade to adjust the shave angle of the razor.
  • the improvement comprises means movable with respect to the cam and to the cam follower portion for pivoting the cam follower out of engagement with the cam and for positioning the of the cutting edge of the blade.
  • the present invention provides a razor having means for safeguarding the cutting edge of the blade during storage to thereby preclude personal injury or damage to the cutting edge.
  • FIG. 1 is a front elevation view of a head of a safety razor constructed in accordance vention
  • FIG. 2 is an exploded view in side elevation of the component parts of the-head
  • FIG. 3 is a cross-sectional view of the head taken along line 3 3 of FIG. 1;
  • FIG. 4 is .a cross-sectional view of a slide component of the head taken along line 4 4 of FIG. 2;
  • FIG. 5 is a front elevation view of the slide.
  • a blade seat 13 is then positioned beneath a cap 21 of the main frame l2-witha blade seating flange 36 against the underside of the cap 21. In this position, a downwardly extending flange portion 42 of the blade seat 13 has the lower ends thereof against the front face of the main frame 12 at points 78.
  • a guard bar 14 is then nested within the blade seat 13, with a crossbar portion 48 positioned between downwardly extending ears 39 formed on the blade seat 13. In this position, positioning studs 55 project rearwardly from the guard bar 14 into sockets 43 formed in the blade seat 13. The guard bar 14 is thus fulcrumed at point 79 against a lower portion of a downwardly extending flange of the blade seat 13.
  • a cross web portion 51 of the guard bar 14 has a cam following detent 50 in abutting engagement with the cam portion 64 of the adjusting cam 16.
  • a main spring 15 is. inserted upwardly between the cross web 51 of the guard bar 14 and the front face of the cam 64.
  • the intermediate portion of the spring 15 is bowed rearwardly to pass the cam portion 64 through an aperture 56 in the spring 15 until the upper portion 64 through an aperture 58 in the spring 15 until the upper portion of the aperture 58 is moved into forwardly interlocked association with the upper edge of the front wall of the groove 67 in the bushing 65.
  • the establishment of this interlocking association between the spring 15 and the bushing 65 serves to hold all of the parts of the head 11 securely in assembled and operative relation.
  • the stress set up in the flexed main spring 15 acts directly on a depending foot 54 of with the present inthe guard bar 14 to press the guard bar 14 upwardly and rearwardly, and at the same time to fulcrum it on the lower edge of the downwardly extending flange 40 of the blade seat at 79.
  • the spring 15 also acts to cause the detent 50 on the cross web 51 of the guard bar 14 to press against and follow the front helically shaped face of the cam portion 64.
  • a slide 92 has inwardly directed members 106, 108 which form a T-shaped channel 104 (FIG. 4) in the underside thereof.
  • the slide 92 is positioned on the handle 10 with the inwardly directed members 106, 108 positioned in vertical channels fonned on each side of the handle 10. Thereafter, the assembled head is positioned on the handle 10 with the lower end of the main frame 12 rigidly secured in irregular channels 17 formed on the handle 10.
  • the detent 50 abuts the helical surface of the cam portion 64.
  • Rotation of a. dial portion 62 having suitable setting indications 76 thereon in either] direction causes the cross web 51 to move in either aforwardly or rearwardly direction while the detent follows the front helical face of the cam portion 64.- Because .of the fulcruming of the guard bar 14 against the blade seat 13 at 79, the crossbar portion 48 of the guard bar is caused at the same time to move in either an upwardly or downwardlydirection fromits guarding position just below and in front of a blade 22.
  • the relative position of the crossbar 48 with respect to the cutting edge of the blade 22 is readily adjustable by a user to obtain a desired closeness of a shave.
  • the slide 92 has spaced upwardly projecting fingers 96, 98.
  • the cam portion 64 is positioned in the spacing between the fingers 96, 98.
  • the fingers 96, 98 have sloped forward surfaces 100, 102 which are out of engagement with the cross web 51 of the guard bar 14 when the slide 92 is in a down position with the slide and handle surfaces 110, 112 in abutting engagement.
  • Application of pressure on a serrated finger portion 94 of the slide 92 acts to move the slide 92 upwardly by movement of the inwardly directed members 106, 108 in the handle channels 90.
  • the sloped upper surfaces 100, 102 of the fingers 96, 98 come into contact with the lower inner surfaces of the cross web 51 and act to pivot the guard bar 14 about the point 79 in a clockwise direction as viewed in FIG. 3.
  • the guard 14 is pivoted to an extent that the crossbar 48 is positioned in front of the cutting edge of the blade 22.
  • a user can readily adjust the relative position of the crossbar 48 with respect to the cutting edge of the blade 22 to a desired position by rotating the dial portion 62 to a particular setting.
  • upward movement of the slide 92 positions the crossbar 48 in front of the cutting edge of the blade to avoid accidental injury or damage from the cutting edge of the blade and also to protect the blade. Since the slide 92 does not contact the dial 62 or the cam portion 64, the relative position of the crossbar 48 with respect to the blade 22 will be set when the slide 92 is returned to its down position.
  • a safety razor comprising means for releasably engaging a single cutting edge blade in a shaving position, a guard member pivotally mounted with respect to said engaging means, said guard member including a transverse guard surface at a forward upper end thereof and a cam follower, a cam for engagement with said cam follower, and means for biasing said cam follower into abutting engagement with said cam whereby adjustment of said cam with respect to said cam follower moves said guard surface in an arcuate direction with respect to the cutting edge of said blade to adjust the shave angle of the razor, the improvement comprising a manually operable slide'having one position for abutting engagement with an underside of said guard member to pivot said cam follower out of engagement with said cam and to position said guard surface in front of the cutting edge of said blade, and another position for disengagement with the underside of said guard member whereby said cam follower is biased into abutting engagement with said cam.
  • a safety razor comprising a main frame having a forwardly projecting cap adapted to overlie a single cutting edge blade, a seat member for releasably supporting said blade against the undrside of said cap, a guard member having a transverse guard surface at a forward upper end thereof, said guard member being in pivotal contact with said seat member, a finger piece journaled on said main frame, a cam connected to said finger piece for rotation therewith, a cam follower on a lower end of said guard member for engagement with said cam, a spring member for biasing said guard member into said pivotal contact with said seat member and for biasing said cam follower into engagement with said cam whereby rotation of said cam moves said guard surface in an arcuate direction with respect to the cutting edge of said blade to adjust the shave angle of the razor, the improvement comprising a manually operable slide having one position for abutting engagement with an underside of said guard member to pivot said cam follower out of engagement with said cam and to position said guard surface in front of the cutting edge of said blade,
  • the razor of claim 2 further comprising a handle, said slide being slidably mounted on said handle.
  • said slide includes means at an upper end thereof for wedging engagement with the underside of said guard member to pivot said cam follower out of engagement with said cam and position said guard surface in front of the cutting edge of said blade.
  • said wedging means comprises a pair of spaced upwardly extending fingers for wedging engagement with the underside of said guard member, said cam being in the space between said fingers.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)
US00289031A 1972-09-14 1972-09-14 Adjustable safety razor Expired - Lifetime US3793725A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US28903172A 1972-09-14 1972-09-14

Publications (1)

Publication Number Publication Date
US3793725A true US3793725A (en) 1974-02-26

Family

ID=23109721

Family Applications (1)

Application Number Title Priority Date Filing Date
US00289031A Expired - Lifetime US3793725A (en) 1972-09-14 1972-09-14 Adjustable safety razor

Country Status (9)

Country Link
US (1) US3793725A (enrdf_load_stackoverflow)
JP (1) JPS5634314B2 (enrdf_load_stackoverflow)
CA (1) CA977539A (enrdf_load_stackoverflow)
DE (1) DE2346482C2 (enrdf_load_stackoverflow)
FR (1) FR2199678A5 (enrdf_load_stackoverflow)
GB (1) GB1417784A (enrdf_load_stackoverflow)
HK (1) HK60081A (enrdf_load_stackoverflow)
NL (1) NL168437C (enrdf_load_stackoverflow)
SE (1) SE387270B (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4501067A (en) * 1982-04-03 1985-02-26 Wilkinson Sword Limited Razors and shaving units for razors
US4715120A (en) * 1981-05-19 1987-12-29 Wilkinson Sword Limited Razors, and shaving units for razors
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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7367125B2 (en) * 2003-12-10 2008-05-06 The Gillette Company Shaving systems

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3128551A (en) * 1962-03-29 1964-04-14 Philip Morris Inc Adjustable injector razor
US3177581A (en) * 1961-07-28 1965-04-13 Philip Morris Inc Injector razor arranged for urging a blade against the cap while it is being washed

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3203093A (en) * 1963-03-14 1965-08-31 Eversharp Inc Safety razor with adjustable guard
DE1227802B (de) * 1964-07-17 1966-10-27 Eversharp Inc Sicherheitsrasierhobel fuer Einschneiden-Klingen mit verstellbarem Schutzglied

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3177581A (en) * 1961-07-28 1965-04-13 Philip Morris Inc Injector razor arranged for urging a blade against the cap while it is being washed
US3128551A (en) * 1962-03-29 1964-04-14 Philip Morris Inc Adjustable injector razor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4715120A (en) * 1981-05-19 1987-12-29 Wilkinson Sword Limited Razors, and shaving units for razors
US4501067A (en) * 1982-04-03 1985-02-26 Wilkinson Sword Limited Razors and shaving units for razors
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

Also Published As

Publication number Publication date
AU6027373A (en) 1975-03-13
CA977539A (en) 1975-11-11
NL168437C (nl) 1982-04-16
NL7312660A (enrdf_load_stackoverflow) 1974-03-18
HK60081A (en) 1981-12-18
DE2346482C2 (de) 1982-12-23
DE2346482A1 (de) 1974-03-28
SE387270B (sv) 1976-09-06
GB1417784A (en) 1975-12-17
JPS49133149A (enrdf_load_stackoverflow) 1974-12-20
FR2199678A5 (enrdf_load_stackoverflow) 1974-04-12
JPS5634314B2 (enrdf_load_stackoverflow) 1981-08-10

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