US2722742A - Replaceable blade - Google Patents

Description

Nov. 8, 1955 A. L. MANIFESTA REPLACEABLE BLADE Filed June 28, 1954 nited States Patent REPLACEABLE BLADE Anthony L. Manifesta, Miami, Fla.

Application June 28, 1954, Serial No. 439,735

2 Claims. (Cl. 30-223) This invention relates in general to improvements in replaceable blades, and more specifically to a replaceable blade assembly for hair clippers.

At the present time hair clippers are so constructed whereby after the blades thereof have become dulled, it be necessary that the head assembly which includes the blades is disassembled and the blades sharpened for further use. Inasmuch as a hair clipper is a relatively precision instrument, the blades thereof must be accurately sharpened and the sharpening thereof is relatively costly. Further, due to the particular construction of the blades of a clipper head, the replacement cost of the blades is relatively high.

It is therefore the primary object of this invention to provide an improved cutter head for hair clippers, the cutter head including a pair of blade supports which-have mounted therein replacement blades, the replacement blades being of the throw-away type so as to greatly reduce the eventual over-all cost of hair clippers.

Another object of this invention is to provide replaceable clipper blades for a hair clipper, the clipper blades being formed of metal stampings which are easily manufactured and at the same time will provide the desired cutting edge, the clipper blades being of such a construction whereby the cost thereof is much less than the normal cost of sharpening clipper blades so that it is economically feasible to throw-away the replacement clipper blades after they have become dull.

A further object of this invention is to provide an improved clipper head assembly which includes a fixed blade support and a reciprocating blade support, the blade supports being provided with replaceable clipper blades which may be quickly and easily inserted therebetween for a clipping action, the fixed blade support being foldable so as to facilitate the replacement of clipper blades without disassembling the cutter head of the hair clipper.

These together with other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure l is a top plan view of a conventional clipper body having mounted thereon the improved clipper head which is the subject of this invention;

Figure 2 is an enlarged perspective view of the clipper head of Figure 1 showing the same removed from the clipped body;

Figure 3 is an enlarged longitudinal vertical sectional view taken substantially upon the plane indicated by the section line 33 of Figure 2 and shows the general cross section of the clipper head of Figure 2;

Figure 4 is an enlarged transverse vertical sectional view taken substantially upon the plane indicated by the section line 44 of Figure 2 and shows the relationship of both the clipper blades and their blade supports with respect to each other;

Figure 5 is an enlarged perspective view, of an uppermost or reciprocating clipper blade;

Figure 6 is an enlarged perspective view of the lowermost or fixed clipper blade;

Figure 7 is an enlarged perspective view of a modified form of fixed blade suport and shows the same in a blade receiving position; and

Figure 8 is a perspective of the fixed blade support of Figure 7 and shows the same in a broken position for the reception of new clipper blades.

Referring now to the drawings in detail, it will be seen that there is illustrated in Figure 1 a hair clipper which is referred to in general by the reference numeral 10. The hair clipper 10 includes a conventional clipper body which may be considered to include a clipper drive assembly housing in which is mounted a clipper drive assembly including an electric motor (not shown). The clipper body 12 has connected thereto an electric wire 14 for furnishing power and a control switch 16. Removably carried by the clipper body 12 is a clipper or cutter head which is referred to in general by the reference numeral 18.

As is best illustrated in Figure 2, the clipper head 18 includes a lower fixed blade support 20 and an upper reciprocating blade support 22. Mounted on the fixed blade support 20 is a fixed clipper blade 24. Carried by the reciprocating clipper blade support 22 is a reciprocating clipper blade 26.

The fixed clipper blade support 20 is generally rectangular in outline and is provided at the rear portion thereof with apertures 28 for the reception of fasteners 30 which are utilized to removably secure the clipper 18 to a housing 32. The housing 32 is normally removably secured to the clipper body 12 to permit the interchanging of clipper heads without the use of any threaded fasteners or the like.

In order that the fixed clipper blade support 20 may have suitably supported thereon the fixed clipper blade 24, it is provided with a socket 34 which is in the form of an arcuate transverse recess. Disposed at the ends of the socket 34 are vertical sockets 36.

As is best illustrated in Figure 6, the fixed clipper blade is also generally rectangular in outline and includes a plurality of spaced cutting teeth 38 at the forward edge thereof. Disposed intermediate the forward and rear ends of the fixed clipper blade 24 is a downwardly disposed projection 40 which forms an arcuate cross sectional intermediate projecting portion of the fixed clipper blade 24. Disposed at opposite ends of the projection 40 are spring fingers 42.

When the fixed clipper blade 24 is properly seated on the fixed clipper blade support, the projection 40 is seated in the socket 34 and the fingers 42 are seated in the sockets 36. Also, the teeth 38 project forwardly of the forward edge of the fixed blade support 20.

The reciprocating blade support 22 is also generally rectangular in outline but is smaller than the fixed blade support 20. Provided on the underside of the reciprocating blade support 20 and extending transversely thereof is a socket 44 which is in the form of an arcuate recess. The socket 44 has communicated therewith vertical sockets 46 at opposite ends thereof.

Referring now to Figure 5 in particular, it will be seen that the reciprocating clipper blade 26 is provided at its forward edge with cutter teeth 48. It is also provided intermediate its ends with an arcuate cross sectional intermediate projecting portion 50. The projecting portion 50 is provided at the opposite ends thereof with outwardly projecting fingers 52.

When the reciprocating clipper blade 26 is properly carried by the reciprocating blade support 22, the proectlng portion 50 is seated in the socket 44 and the fingers cating clipper blade support 24 a fitting 54. The fitting 54 is of such a nature for engaging the drive means of the clipper to effect reciprocation of the reciprocating clipper blade 26.

Referring now to Figures 7 and 8 in particular, it will be seen that there is illustrated a modified form of fixed blade support which is referred to in general by the reference numeral 56. The fixed blade support 56 includes a rear mounting portion 58 and a forward blade support- 3 ing portion 60. The two portions 58 and 60 are connected together by a transversely extending hinge pin 62.

In order to facilitate mounting of the fixed blade support 56, the mounting portion 58 is provided with a pair of vertical apertures 64 for the reception of fasteners such as the fasteners 30. In order to facilitate the mounting of a fixed clipper blade 24, the blade supporting portion 60 is provided with a transverse extending socket 66 in the form of an arcuate recess. Opposite ends of the sockets 66 communicate with vertical sockets 68.

The mounting portion 58 and the blade supporting portion 60 are normally retained as a rigid unit by a set screw 70 which extends longitudinally through the mounting portion 58 and seats in a socket 72 in the rear part of the blade supporting portion 60. The set screw 70 normally overcomes the hinging action between the two portions 58 and 60. However, when it is desired to replace the clipper blades 24 and 26 the setscrew '70 may be backed off and the blade supporting portion 60 permitted to swing downwardly, as is best illustrated in Figure 8. This permits the removal of the clipper blades 24 and 26 without disassembling the clipper head.

Inasmuch as the clipper blades 24 and 26 may be stamped from sheet material which is of a high quality steel, and the clipper blades may be mass produced for use in all types of hair clippers in the same manner as razor blades, it will be seen that the cost of the replace- 4 able clipper blades 24 and 26 will be much less than the normal cost for sharpening conventional type clipper blades and therefore the replaceable clipper blades are economically feasible.

From the foregoing, the construction and operation of the device will be readily understood and further explanation is believed to be unnecessary. However, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction shown and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope of the appended claims.

What is claimed as new is as follows:

1. A head assembly for electric hair clippers comprising a fixed blade support adapted to be removably secured to a clipper drive assembly housing, a reciprocating blade support overlying said fixed blade support and securable to a clipper drive assembly, removable clipper blades carried by said fixed blade support and said reciprocating blade support, said fixed blade support including a mounting portion and a blade supporting portion hingedly connected together to permit separation of said blade supports and the removal of said clipper blades.

2. A head assembly for electric hair clippers comprising a fixed blade support adapted to be removably secured to a clipper drive assembly housing, a reciprocating blade support overlying said fixed blade support and securable to a clipper drive assembly, removable clipper blades carried by said fixed blade support and said reciprocating blade support, said fixed blade support including a mounting portion and a blade supporting portion hingedly connected together to permit separation of said blade supports and the removal of said clipper blades, lock means selectively connecting said mounting portion and said blade supporting portion as a rigid unit.

' References Cited in the file of this patent UNITED STATES PATENTS

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