US2715768A

US2715768A - Rotatable blade clamping safety razor

Info

Publication number: US2715768A
Application number: US317681A
Authority: US
Inventors: Hoberg Paul
Original assignee: Individual
Current assignee: Individual
Priority date: 1952-10-30
Filing date: 1952-10-30
Publication date: 1955-08-23
Anticipated expiration: 1972-08-23

Description

Aug. 23, 1955 P. HOBERG 2,715,768

ROTATABLE BLADE CLAMPING SAFETY RAZOR Filed. Oct. -30, 1952 2 Sheets-Sheet l E 37 as 54 3 I JNVENTOR.

PAUL HOBERG BY Aug. 23, 1955 P. HOBERG 2,715,768

ROTATABLE BLADE CLAMPING SAFETY RAZOR Filed Oct. 30, 1952 Z'Sheets-Sheet 2 IN V EN TOR. PAUL HoBE RG United States Patent ROTATABLE BLADE CLAMPING SAFETY RAZOR Paul Hoberg, Brooklyn, N. Y.

Application October 30, 1952, Serial No. 317,681

4 Claims. (Cl. 30-605) This invention relates to new and useful improvements in safety razors of the type adapted to receive a thin flexible double-edge blade.

More particularly, the present invention proposes the construction of an improved hoe-type razor having a pair of rotatable blade clamping members which can be operated by twisting a part of the handle and which by novel structure will securely clamp a razor blade and lock it in position for shaving use.

Another object of the present invention proposes forming the safety razor with a tubular handle rod having its side walls cut to form a camming and locking groove for use with a removable handle pin to operate and lock the blade clamping members.

Still further, the present invention proposes constructing the razor with a solid handle rod having a camming and locking groove formed in it for operating and locking the blade clamping members.

As a further object, the present invention proposes providing a spring biased plunger at the blade clamping member engaging the end of the handle rod to assist in operating the blade clamping members.

The present invention further proposes the novel arrangement of a single head plate for simplicity of construction and a closed bottom head plate with blade clamping member pivoting bars for obtaining the advantages of a closed type structure without interfering with the operation of the blade clamping members.

Another object of the present invention is to provide blade clamping members each having a handle rod receiving groove with an end-locking lug at one end adjacent thereto and a positioning groove at other end opposite the locking lug.

A further object of the present invention is to provide a novel blade clamping member having end extensions to fully cover the width of a razor blade when in clamping position.

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawings, and to the appended claims in which the various novel features of the invention are more particularly set forth.

In the accompanying drawings forming a material part of this disclosure:

Fig. 1 is a perspective view illustrating the razor of the present invention with a blade held therein and parts broken away.

Fig. 2 is a view similar to Fig. l but showing the blade clamping members in raised position and the blade removed.

Fig. 3 is a side elevational view of the razor in the position illustrated in Fig. 2.

Fig. 4 is an exploded view of the razor shown in Figs. 1 to 3, inclusive.

Fig. 5 is a bottom plan view of the head plate illustrated in the several figures and of the blade clamping members in the position shown in Figs. 2 and 3.

2,715,768 Patented Aug. 23, 1955 Fig. 6 is a view similar to Fig. 5 but showing the blade clamping members in the position shown in Fig. 1.

Fig. 7 is a top plan view of the structure shown in Fig. l but with the blade removed.

Fig. 8 is a sectional view of a handle rod structure illustrating a modification of the present invention.

Fig. 9 is an elevational view, partly in section, of another handle rod structure illustrating another modification of the present invention.

Fig. 10 is a bottom plan View similar to Fig. 5 but illustrating a further modification of the present invention.

Fig. 11 is a top plan View of the structure shown in Fig. 10.

Fig. 12 is an end view of the head plate structure shown in Fig. 11.

Fig. 13 is a perspective view of another blade clamping member illustrating a still further modification of the present invention.

Fig. 14 is a top plan view of still another blade clamping member illustrating another modification of the present invention.

Fig. 15 is an end view of the structure shown in Fig. 14.

The safety razor, in accordance with the first form of the invention illustrated in Figs. 1 to 7, inclusive, has a hollow handle 20. A handle rod 21 extends through handle having a central portion 22 rotatable in the handle and an end portion 23 adapted to extend from the bottom of the handle. End portion 23 preferably is of the same outside diameter as the handle 20, both preferably being round in cross-section, and the central portion 22 is of smaller diameter. End portion 23 may be knurled as shown for ease in rotating the handle rod 21 in the handle 20.

A shank portion 24 of further reduced diameter is formed on the other end of the handle rod 21 with an end member 25 in the form of a rounded head. An abutment 26 is spaced from the end member 25 on the shank portion 24, the shank portion 27 of the handle rod 21 between the rounded head 25 and the handle rod abutment 26 being of still further reduced crosssection to form the handle rod abutment 26.

Central portion 22 of the handle rod 21 is tubular and a locking slot 28 with an inclined carnming slot 29 is formed in its walls, the inclined camming slot extending from the locking slot toward the end member 25.

Handle 20 has a pin opening 30 (Fig. 4) extending through one side wall, and a pin 31 removably extends through the pin opening 30 for engagement with the

handle rod slots

28 and 29. Handle 20 also has a sleeve bracket 32 secured to its upper end.

A head plate 33 is removably secured to handle 20, the plate 33 being provided with screw holes 34 to receive screws 35 (Fig. 4) extending through sleeve bracket 32 on the handle 20.

Head plate 33 has a central opening 36 for the handle rod end member 25 and shank 24.

Lateral slot openings

37 and 38 extend from the central opening 36 and a pair of

blade clamping members

39 and 40 pivotally extend into the

lateral slot openings

37 and 38 of the head plate.

Blade clamping members

39 and 40 have adjacent arcuately curved

portions

41 and 42 each with a central opening 43 to pass the shank portion 27 of the handle rod 21, and

abutment tongues

44 and 45 are provided on the blade clamping members. The

abutment tongues

44 and 45 are adapted and positioned to underlie the end member or rounded head 25 of the handle rod 21 for rotating the

blade clamping members

39 and 40 to open or blade-receiving position and to overlie the handle rod abutment 26 for closing the blade clamping members.

' limited by the length of thesle 29 and ra n and eev moved from the razor.

A eloekwis twist of the knu l d end po on .2 0f

the handle rod 21 will turn and lock the blade clampin members 39-and 4.0 into bla e reta nin pos on y rea on of the handl red a utmen 25 hea ing ag ins the blade clamping members abutment tongues 44. and 45,

"T e modified form of the inventi n sh wn .in :Fig. 8

is characterized by the provision of ahandlerod 47 h ving a shank portion 4. s id ly mounted in the nd of a tubular cen ral p rtion 14-9- Res lient means in the form of .a co l p ing .59 encireles the shank .per en 18 and bears aga n t an abutment 51 of the tubula por o .4? and an end pi e 52 en the sha k p rtion 4.8 o bia the shank por ion and end mem er .53 of th s ank perti n 4.8 toward the .centr l por ion 4. of heha dle od- ,Step means in the form of a shoulder s provided adiaeent toand spaced from the en member 5;3 V V he Inedified form of the inxentien shown .in Fig. 9 is characterized by the provision of a handle-rod 5 5 of solid form with a locking slot 56 and inclined camming slot 57 formed in the solid central portion of the handle red. A sleeve 58 held to the solid central portion by set screw 59 provides an end portion for turning the ha d e e In the modified tom of the invention shown in Figs.

amend t at ba s i to the r e ed portions 62 and 6; 9t th head pla I 4 The modification of 'the invention illustrated 'i'n Fi g. is ehareetet z d by the pre is en 9f bladeelam ing member 66 having

end extension wings

67 and ,68 at its outer sides, a pair of such members being used.

In the modified form of the invention illustrated by Figs. 14 and 15, a blade clamping member 69 is provided with a locking lug and rotation stop 70 at one end 71 and a positioning and locking groove 72 at the other end 73. A pair of suchmembers are used, the

two being similarly. constructed except thatthe groove 72 of one clamping member is disposed opposite the lug 70 of the other clamping member;

While I have illustrated and described. thepreferred embodiments of my invention, it is. to be understood that I do not limit myself to the precise constructions herein disclosed and the right is reserved to all changes and modifications coming within the scope of the invention as defined in the appended claims.

Having thus described myinyention, whatJI claim as new, and desire to secure byU-nited States. Letters Patent 1s: 1. A safety razor comprising a hollow handle, a hollow handle-rod extending rotatablythrough said hollow han: dle, a head plate removably securedto said handle, and a pair .of blade-clamping members engaging said hollow handle-rod, said hollowrod llavinga shankportion ex: tending through one end thereof, and; tension means .on said shank portion biasing said shank portion. -.towards the. central portion .ofthe handle-rod.

2.-The combination 9f .claim 1 wherein. said hollow rod includes aninternalshoulder portion engaged :by said tension means, said shankhaving an endinember to receive the head plate.-

, 3. The combination of claim 2 wherein the hollow handle includes anppeninga pinin said opening, and said handle rod having a spiral groove, saidpin riding in said groove to .openiand clqseihe razor. s V

.4. The razor otclairn '3. wherein saidhead plate re? tains said pair of blade clamping members, each memher having a rotation stop lug at one end and a locking groove at the other end. V a