US3660894A

US3660894A - Safety razor

Info

Publication number: US3660894A
Application number: US30666A
Authority: US
Inventors: Robert T Sand
Original assignee: Individual
Current assignee: Individual
Priority date: 1970-04-22
Filing date: 1970-04-22
Publication date: 1972-05-09
Anticipated expiration: 1989-05-09

Abstract

A safety razor for a removable and replaceable blade which is characterized by a one-piece head and handle with no moving parts utilizing a magnetic holding device for the blade, and an assembly guide which moves the working blade edge in and over a safety bar to position it properly for a shaving angle together with a unique handle combined with the head serving also as a retainer for blade storage.

Description

iinited States Patent Sand [ 51 May 9, 1972 (541 SAFETY RAZOR [72] Inventor: Robert T. Sand, 5220 McClellan Ave.,

Detroit, Mich; 48213 [22] Filed: Apr. 22, 1970 [21] Appl.No.: 30,666

[52] US. (11 ..30/74, 30/75 [51} Int. Cl i ..lB26b 21/16 [58] Field of Search ..30/51, 74, 75, 84, 329

[56] References Cited UNITED STATES PATENTS 1,246,219 11/1917 Ballreich ..30/84 v 2,294,774 9/1942 Davies ...30/84 X 2,350,816 6/1944 Przybysz 30/84 UX 2,534,490 12/1950 Weeks ..30/51 2,967,354 1/1961 Ahlborn ..30/74 X FOREIGN PATENTS OR APPLICATIONS 368,399 3/1932 Great Britain ..30/74 633,170 7/1936 Germany ..30/84 759,926 10/1956 Great Britain ..30/74 Primary Emminer-Francis S. Husar Assistant Examiner-Gary L. Smith At10rney--Bames, Kisselle, Raisch & Choate [57] ABSTRACT A safety razor for a removable and replaceable blade which is characterized by a one-piece head and handle with no moving parts utilizing a magnetic holding device for the blade, and an assembly guide which moves the working blade edge in and over a safety bar to position it properly for a shaving angle together with a unique handle combined with the head serving also as a retainerfor blade storage.

7 Claims, 12 Drawing Figures PATENTEDMM 91m 3,660,894

EMU 2 UP 2 NVENTOR 2050?? 7. JA/VQ BY g KM, $004 440%;

ATTORNEYS SAFETY RAZOR This invention relates to a safety razor for removable and replaceable blades and more particularly to a razor blade holder with no moving parts designed to hold a double edge blade securely in position for shaving while permitting ready disassembly.

Razor blade combinations have generally included a suitable holding base together with clamping side flaps which retract to permit insertion of the blade and which are moved back on to the blade to hold it in position. This is generally accomplished by a screw type handle which manipulates the clamping flaps.

The present invention contemplates a razor head and holder which will accommodate a single blade with no moving parts, there being a special guide for insertion of the blade to prevent damage to the cutting edge.

It is a further object to provide a one-piece razor head which utilizes the magnetic properties of a blade to hold it in position and also to provide a head design which can be molded out of a suitable plastic material with proper guide means and guard means combined with a handle molded into the head.

Another object of the invention is the provision of a handle which has spaced shafts that serve as a locator and retainer for a blade holder, thus providing a simple compact combination for both blade storage and razor use.

Other objects and features of the invention relating to details of construction and operation will be apparent in the following description and claims in which the preferred embodiment for the invention is set forth together with the principle of operation.

Drawings accompany the disclosure and the various views thereof may be briefly described as:

FIG. 1, an elevation of the device from the rear.

FIG. 2, a side elevation of the device from one end of the razor head.

FIG. 3, a plan view on line 3--3 of FIG. 2.

FIG. 4, a sectional view on line 44 of FIG. 1.

FIG. 5, a plan view of a blade for use in the assembly.

FIG. 6, a view of the details of a guard rod and magnet.

FIG. 7, a side view of a guide plate to be molded into the razor head.

FIG. 8, a sectional view on line 8-8 of FIG. 7.

FIG. 9, a sectional view on line 9-9 of FIG. 1 showing a blade holder.

FIG. 10, a modified view of a razor handle showing the manner in which a storage cassette can be located in the handle.

FIG. 11, a face view of the razor head from the cutting edge side.

FIG. 12, a sectional view on line l212 of FIG. 10.

Referring to the drawings:

In FIGS. 1, 2, and 3, the first embodiment of the assembly is shown comprising a head having a top portion 22 and a side portion 23 depending therefrom. Embedded in the side portion 23 are the top ends of two

handle shafts

26 and 28 joined together at a bight 30.

Between the spaced

shafts

26 and 28 can be mounted a razor blade container 32 of the type generally used today having suitable discharge openings at each end for dispensing new blades and

openings

34 and 36 for the insertion of old blades for storage. The side edges of this container are notched as shown at 38 in FIG. 9 to receive the spaced

shafts

26 and 28.

The head portion of the razor is shown in section in FIG. 4. This head portion is molded from a suitable plastic and embedded therein is a magnet piece 40 shown in plan in FIG. 6. This magnet insert has a central opening 42 with a notch 44 provided in a beveled edge 46 at one side. The other side of the magnet piece 40 is also beveled at 48 and it is provided at its ends with notches 50 to receive the turned in ends 52 of a safety bar 54 which is formed from a round rod bent into the collapsed U-shape shown in plan in FIG. 6.

The head 22 is molded in such a way that there is a flat blade supporting surface 24 on its underside and the safety bar 54 lies outwardly and downwardly from the surface 24 and spaced from the forward edge 56 of the blade head. The plastic of the head covers the magnet and thus seals it without impairing its effectiveness.

A razor blade 60 is shown in shaving position in FIG. 4 in the assembly, the cutting edge 62 lying above and spaced from the safety bar 54. This blade is held in position by reason of the magnetic attraction of the permanent magnet insert 40 which can be formed of any suitable permanent magnet material either cast or molded from a powder. The blade 60 has a longitudinal central opening 64 which terminates in some narrower slots 66 at each end. The means for locating the blade comprises a projection 68 molded on to the head 22 and depending therefrom at the supporting surface 24.

The projection 68 at its base includes a small shoulder 70 which has a dimension which equals in general the width of the opening 64 so that the opening will fit down over the base of the projection 68 and be relatively stable. In this position, of course, the edge 62 is lying over the safety bar 54 and it must be guided into this position in a manner which will prevent damage to the edge. This is accomplished by a guide insert 72 shown in FIG. 8 having a portion 74 which is molded into the projection 68 and portions 76 which extend outwardly from this projection 68 and which are disposed behind the general plane of the insert portion 74 in a curved configuration.

When the blade is threaded on to the extending plate 72, the slots 66 will guide it onto the projection 68 where it may move upwardly toward the surface 24. The camming effect of the projections 72 will keep the blade moved back toward the handle portion 23 until the forward edge of the blade can clear the inside surface of the safety bar 54. Once past this surface, the blade can then move to the left as viewed in FIG. 4 so that it may fit down over the shoulder 70 and at the same time be clamped in position by the magnetic attraction of the insert 40. Thus, the blade moves into the proper position for shaving relative to the bar 54. The blade may easily be removed by grasping the ends and pulling it downwardly and then it will be cammed to the right by the projection 72 and dropped from the locating block 68. It will be noted that the safety bar 54 projects beyond the comers of the blade so that there is ample protection against being cut by these corners.

In FIG. 10, a modified structure is shown having essentially the same head portion but the handle has two spaced

bars

80 and 82 embedded in a portion 84 of the head, the bars separating to provide spaced

portions

86 and 88 which engage in grooves of a two-part blade cassette 90 which telescopes together in a relatively tight water seal, this cassette having side grooves 92 to receive the handling

portions

86 and 88. In each embodiment, the depending plate 72 is notched at 94 to help prevent dropping of the blade as it descends from the operating position on the head.

It will thus be seen that there is provided in the present invention a one-piece razor construction with no moving parts which securely clamps the razor blade in position with a mechanical locking which prevents dislodgment except by the intention of the operator. The shaving pressure against the edge of the blade is fully supported by the blade head so that there is no danger of it becoming dislodged in use. In addition, the handle which is molded into the head serves as a convenient means of suspending the razor should this be desired and also as a means of blade storage and at the same time the handle rigidifies the head because of the integral molding within the head proper.

I claim:

1. A safety razor for a removable and replaceable blade which comprises:

a. a razor head having a blade carrying surface on its under side,

b. a magnet carried by said head adjacent said surface,

c. means carried by said head to position a blade on said surface to be held in place by said magnet, and

d. means along one edge of said head spaced outwardly and downwardly from said surface to serve as a safety guard.

2. A safety razor as defined in claim 1 in which said head is a molded plastic and said magnet is embedded therein above and spaced from the said underside surface.

3. A safety razor as defined in claim 1 in which a handle is attached to said head on the edge spaced from said one edge.

4. A safety razor as defined in claim 2 in which a handle is molded at one end into said head at the edge opposed to said one edge.

5. A safety razor as defined in claim 3 in which said handle is composed of two shafts connected at one end and attached at the other end to said head.

6. A safety razor as defined in claim 1 in which guide means is provided on said head to move a blade in a path to permit a cutting edge to pass inside and over said safety guard means in its movement toward said blade carrying surface.

7. A safety razor and blade combination which comprises:

a. a razor head having a blade carrying surface on its under side,

b. first means to clamp a blade against said surface,

c. means carried by said head to position a blade on said surface to be held in place by said first means comprising a projection from said surface,

d. a blade having an opening between its edges to receive said projection, said projection at its inner end being dimensioned to lock said blade in position and having a dimension at its outer end to guide said blade to position,

e. means along one edge of said head spaced outwardly and downwardly from said surface to serve as a safety guard, and

f. means adjacent said projection to guide a blade in a path to permit a cutting edge to pass inside and over said safety guard means in its movement toward said blade carrying surface.

Claims

1. A safety razor for a removable and replaceable blade which comprises: a. a razor head having a blade carrying surface on its under side, b. a magnet carried by said head adjacent said surface, c. means carried by said head to position a blade on said surface to be held in place by said magnet, and d. means along one edge of said head spaced outwardly and downwardly from said surface to serve as a safety guard.

7. A safety razor and blade combination which comprises: a. a razor head having a blade carrying surface on its under side, b. first means to clamp a blade against said surface, c. means carried by said head to position a blade on said surface to be held in place by said first means comprising a projection from said surface, d. a blade having an opening between its edges to receive said projection, said projection at its inner end being dimensioned to lock said blade in position and having a dimension at its outer end to guide said blade to position, e. means along one edge of said head spaced outwardly and downwardly from said surface to serve as a safety guard, and f. means adjacent said projection to guide a blade in a path to permit a cutting edge to pass inside and over said safety guard means in its movement toward said blade carrying surface.