Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS3636627 A
Publication typeGrant
Publication dateJan 25, 1972
Filing dateAug 11, 1969
Priority dateAug 11, 1969
Publication numberUS 3636627 A, US 3636627A, US-A-3636627, US3636627 A, US3636627A
InventorsVictor Tiffin
Original AssigneeVictor Tiffin
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Razor with oscillating head
US 3636627 A
Abstract
A battery-driven vibratory safety razor in which a battery-driven electric motor in the handle of the razor has a very short eccentrically weighted shaft, and the structure is such that the entire assembly may be made by inserting components through the rear of the handle. A blade carrier and blade support are mounted in a plug in the front end of the handle by means of a central threaded post which is on the blade guard and impales a central hole in the blade carrier. The speed of rotation of the eccentrically weighted motor shaft and the size of the orbit in which the razor head moves are coordinated with observed characteristics of hand motions of shavers to minimize possible cutting of the face during shaving.
Images(1)
Previous page
Next page
Description  (OCR text may contain errors)

United States Patent Tiffin [451 Jan.25, 1972 [54] RAZOR WITH OSCILLATING HEAD [72] Inventor: Victor Tii'iin, R.R. l, P.O. Box 20, South Elgin, Ill. 60177 [22] Filed: Aug. 11, 1969 [21] Appl.No.: 848,924

[52} [1.8. CI. ..30/45, 30/DlG. l [51] Int. Cl ..B26b 2|/38 [58] Field of Search ..30/44, 45

[56] References Cited UNITED STATES PATENTS 2,054,418 9/1936 Bohm ..30/45 Primary ExaminerFrancis S. Husar Assistant ExaminerGary L, Smith Attorney-Hofgren, Wegner, Allen, Stellman & McCord [57] ABSTRACT A battery-driven vibratory safety razor in which a batterydriven electric motor in the handle of the razor has a very short eccentrically weighted shaft, and the structure is such that the entire assembly may be made by inserting components through the rear of the handle. A blade carrier and blade support are mounted in a plug in the front end of the handle by means of a central threaded post which is on the blade guard and impules u central hole in the blade carrier. The speed of rotation of the eecentrically weighted motor shaft and the size of the orbit in which the razor head moves are coordinated with observed characteristics of hand motions of shavers to minimize possible cutting of the face during shav- 8 Claims, 4 Drawing Figures RAZOR WITH OSCILLATING HEAD BACKGROUND OF THE INVENTION This invention relates to an improved vibratory safety razor.

Before the present invention, there have been various proposals for safety razors which provide vibratory action through use of various intricate mechanisms that are susceptible to excessive wear and breakage; and that are expensive to produce. Thus, the intricate structure of these razors has curtailed their use.

SUMMARY OF THE INVENTION It is a principle object of the present invention to provide a new and useful vibratory razor with a lightweight, simplified structure consisting of a minimum number of parts, all of which may be inexpensively fabricated and assembled.

The vibratory razor of this invention includes a hollow onepiece handle having a rearward portion of a first diameter and a forward portion of a smaller diameter, with the handle being open at both ends. A removable closure cap engages the bandle and closes the open rear end. A head assembly is mounted in the open front end of the handle by means of a frictionally fitted plug; and the head assembly includes a blade guard, a blade carrier and a blade support of which the plug is a part. An electric cell is snugly received in the rearward portion of the handle, and vibratory means comprising an electric motor driven by the cell and having an eccentrically weighted shaft is snugly received in the forward portion of the handle. Switch means for selectively closing a circuit between the electric cell and the motor consists of a manually operated screw contact in the closure cap.

Thus, the present invention provides simple and inexpensive means for mounting the head assembly on the front of the handle.

The switch means is simple, inexpensive and positive; and a bayonet slot connection fore closure cap also eliminates machining of the cap and handle.

Simple and inexpensive vibratory means is provided by mounting an eccentric mass on the motor shaft.

An object of this invention is to drive the head assembly in a circle of oscillation to provide a comfortable motion of the razor on the face.

Further objects will become more fully apparent in the following description of the embodiment of this invention and from the appended claims.

DESCRIPTION OF THE DRAWINGS In the drawings:

FIG. 1 is a perspective view of one embodiment of a vibratory razor made according to the present invention;

FIG. 2 is a longitudinal central sectional view taken substantially as indicated along line 2-2 in FIG. 1;

FIG. 3 is a transverse sectional view taken substantially as indicated along the line 33 in FIG. 2; and

FIG. 4 is a transverse sectional view taken substantially as indicted along the line 4-4 of FIG. 2.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to FIGS. 1 and 2, a one-piece hollow handle is shown having a rearward portion 10a of a first diameter and a forward portion 10b of a smaller diameter, an open front end 100 and an open rear end 10d. A removable cuplike closure cap 12 closes the open rear end 10d.

An electric cell 14 is snugly received in the rearward portion 10a of the handle 10, and vibratory means 16 is snugly received in the forward portion 10b. As shown, a razor head assembly 18 is mounted in the forward portion of the handle 10.

Continuing now to the closure cap 12, the extreme rear portion of the handle 10 has a plurality of outwardly struck bosses 20, as shown in FIG. 2. The closure cap 12 includes a cylindrical sidewall 12a and a bottom 12b; and a set of longitudinal grooves 22 in the sidewall to receive the bosses 20 of the handle 10. A circumferentially extending groove 24 on the inner surface of the sidewall 12a allows twisting motion of the handle 10 to lock the bosses 20 in the groove 24 and thus positively but removably secure the closure cap 12 on the handle 10.

The electric cell 14 is held in position by friction between the outer surface of the cell 14 and the inner surface of the handle 10.

The vibratory means 16 received in the forward portion of the handle 10 is held in position by friction between the outer surface of the vibratory means 16 and the inner surface of the handle 10. The vibratory means 16 comprises an electric motor 26 having a short shaft 28 extending which is supported only by the motor and extends toward the front portion'of the handle 10, and an eccentric mass 30 mounted on the shaft 28 close to the front of the motor.

A resilient insulator 32 isolates the body of the electric motor 26 from the electric cell 14 while providing correct spacing to allow electrical contact between a motor contact 34 and an electric cell post 36. The other electrical contact for the motor 26 is between the outer surface of the motor 26 and the inner surface of the razor handle 10.

Considering now the razor head assembly 18, a conventional blade guard 38 secures a razor blade 40 on a conventional blade carrier 42. The blade guard 38 and blade carrier 42 are held in position by a blade support 44 which is mounted in the forward portion of the handle 10. The blade carrier 42 and blade guard 38 have conventional interlocking parts, including holes 46 and bosses 48, which fix a razor blade 40 securely in place.

As illustrated, the blade carrier has a central bore 52 to receive an integral threaded post 54 on the blade guard 38; and the blade support 44 has a central threaded bore 56 to receive the threaded post 54.

As illustrated in FIG. 2, the means mounting the head assembly 18 in the open front end 10c of the handle 10 comprises a plug 58 which is integral with the blade support 44 and makes a press fit with the handle 10, being held in position by friction between the plug 58 and the handle 10.

In the preferred form, switch means is provided in the bottom of the closure cap 12A manually operable threaded screw 60 extends through a centrally located threaded hole 62 in the bottom of the closure cap 12 to provide a selective electrical contact between the bottom of the cell 14 and the closure cap 12. The remaining portion of the bottom of the cell 14 is insulated from the closure cap 12 by a resilient insulator 64. Electrical contact between the closure cap 12 and the handle 10 is made through their connecting surfaces. Tension between the screw handle 66 and the bottom 12b of the closure cap 12 is provided by a spring 68. The configuration is such that electrical contact between the cell 14 and the closure cap 12 can be opened or closed by manually operating the screw contact 60, thus opening or closing an electrical circuit between the cell 14 and the motor 26.

With the electrical circuit closed, the eccentric mass 30 is driven by the motor 26 and the shaft 28 about the shaft axis causing the entire razor structure to oscillate in a circular manner. When the razor head assembly 18 is pressed against the face in shaving, the circle of oscillation is distorted. In one configuration, the eccentric mass 30 is driven about the shaft 28 at a rotation of about 3,600 revolutions per minute to cause the head assembly to rotate in a circle of oscillation having a diameter of about ten one-thousandths of an inch. Contact with the face elongates the circle of oscillation to about twelve one-thousandths in one direction and correspondingly shortens it in the other direction.

A study of the rate at which various men move the hand during shaving with a safety razor and the customary nature of the strokes taken in such shaving shows that the above-stated speed of rotation and circle of oscillation provide optimum shaving results for many men. Further, ten one-thousandths diameter circle of oscillation appears to be well coordinated with the rate of razor travel and length of razor stroke used by many men in shaving so as to produce optimum smoothness in the travel of the razor blade over the face.

The foregoing detailed description is given for clearness of understanding only, and no unnecessary limitations should be understood therefrom, as modifications will be obvious to those skilled in the art.

I claim:

1. A vibratory razor comprising, in combination: a hollow one-piece handle having a rearward portion and a forward portion, said handle being open at the rear; a removable closure cap engaging said handle and closing said open rear end; an electric cell snugly received in said rearward portion; vibratory means comprising an electric motor driven by said cell snugly received in said forward portion, said motor having a short shaft which is supported only by the motor and extends toward the front of the handle, and an eccentric mass on said shaft immediately adjacent the front of the motor; switch means to selectively close a circuit between said cell and said motor; and a head assembly having a blade guard, a blade carrier and a blade support, said head assembly including means mounting the blade support on the forward portion of said handle spaced forwardly of the motor shaft and the eccentric.

2. The combination of claim 1 in which the switch means comprises a manually operated screw contact in the closure cap.

3. The combination of claim 1 including a bayonet slot connection between the closure cap and the handle.

4. The combination of claim 1 in which the eccentric mass is driven around the shaft approximately 3,600 revolutions per minute to move the head assembly in a circle of oscillation having a diameter of about ten one-thousandths of an inch.

5. The combination of claim 1 in which the means mounting the head assembly comprises a plug which makes a friction fit in the front of the handle.

6. The combination of claim 5 in which the plug is integral with the blade support and makes a press lit in the front of the handle.

7. The combination of claim 1 in which the blade support has a rear end which makes a press fit on the front of the handle and a front end provided with a central threaded bore, and in which the blade carrier and blade guard include a threaded post which screws into said bore.

8. The combination of claim 7 in which the threaded post is on the blade guard and impales a central hole in the blade carrier.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2054418 *Apr 27, 1934Sep 15, 1936Kupfer Asbest CoSafety razor
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3772779 *Jul 19, 1971Nov 20, 1973Gillette CoSafety razor
US4083102 *Dec 10, 1976Apr 11, 1978Harshberger Russell PVibratory razor with adjustable guards
US4744144 *Apr 2, 1986May 17, 1988Wellington Investments, Inc.Oscillating razor
US4784642 *Oct 7, 1986Nov 15, 1988Pfizer Hospital Products Group, Inc.Meterless drainage device with suction control
US4819330 *Oct 5, 1987Apr 11, 1989Fenn Lawrence ELive-action blade shaver
US4914816 *Mar 23, 1989Apr 10, 1990Fenn Lawrence ELive-action blade shaver
US5007169 *Dec 11, 1989Apr 16, 1991Warner-Lambert CompanyVibrating razor
US5046249 *Jul 23, 1990Sep 10, 1991Matsushita Electric Works, Ltd.Motor driven oscillating razor
US5123406 *Mar 8, 1990Jun 23, 1992Nihonkenkozoshinkenkyukai Co., Ltd.Motor-driven massaging apparatus
US5214851 *Aug 15, 1990Jun 1, 1993Wilkinson Sword Gesellschaft Mit Beschrankter HaftungRazor
US5299354 *Oct 11, 1990Apr 5, 1994The Gillette CompanyOscillating shaver
US5732470 *Feb 8, 1996Mar 31, 1998Good Marketing, Inc.Oscillating razor
US5933962 *Aug 26, 1997Aug 10, 1999Good Marketing, Inc.Oscillating razor
US6125542 *Apr 30, 1998Oct 3, 2000Somma; DanteSelf-powered razor head
US7028405Mar 4, 2003Apr 18, 2006S.C. Johnson & Son, Inc.Vibratory shaver
US7251894 *Jul 14, 2003Aug 7, 2007Koninklijke Philips Electronics N.V.Device for shaving hair having a cutting member with a periodical motion
US7441336 *Aug 12, 2005Oct 28, 2008The Gillette CompanyHand held appliances
US7536787Jul 6, 2004May 26, 2009Ridgewood Industries LlcWet razor and electric trimmer assembly
US7761998Mar 9, 2009Jul 27, 2010Ridgewood Industries LlcWet razor and electric trimmer assembly
US7810243 *Nov 30, 2007Oct 12, 2010The Gillette CompanyRazors
US8250763Feb 18, 2010Aug 28, 2012The Gillette CompanyBattery-operated razor
US8302316Mar 22, 2012Nov 6, 2012The Gillette CompanyBattery-operated razor
US8474142Mar 21, 2012Jul 2, 2013Eveready Battery Company, Inc.Wet razor and electric trimmer assembly
US8763256 *Oct 4, 2004Jul 1, 2014Bic-Violex S.A.Vibrating wet shaver
EP1922186A1 *Sep 2, 2006May 21, 2008The Gillette CompanyRazors
WO1986004854A1 *Feb 25, 1986Aug 28, 1986Julia ChenardVibrating razor with cutting blade
Classifications
U.S. Classification30/45, 30/DIG.100
International ClassificationB26B21/38
Cooperative ClassificationB26B21/38, Y10S30/01
European ClassificationB26B21/38