U.S. patent number 3,728,788 [Application Number 05/175,255] was granted by the patent office on 1973-04-24 for straight razor adapted for use with injector blades.
Invention is credited to Robert E. Pearson.
United States Patent |
3,728,788 |
Pearson |
April 24, 1973 |
STRAIGHT RAZOR ADAPTED FOR USE WITH INJECTOR BLADES
Abstract
A razor of the straight razor type has closely spaced blade
shields adjacent one of its ends, and an opening adjacent to but
spaced from the blade shields which will receive a key of an
injector cartridge with an interference fit, which may use injector
blades and receive them directly from their cartridge.
Inventors: |
Pearson; Robert E. (Seymour,
IN) |
Family
ID: |
22639575 |
Appl.
No.: |
05/175,255 |
Filed: |
August 26, 1971 |
Current U.S.
Class: |
30/53;
30/40.2 |
Current CPC
Class: |
B26B
21/08 (20130101) |
Current International
Class: |
B26B
21/08 (20060101); B26b 021/10 (); B26b
021/24 () |
Field of
Search: |
;30/40,40.2,53,62,65,54,55,32 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Simpson; Othell M.
Assistant Examiner: Smith; Gary L.
Claims
I claim:
1. A razor of the straight razor type comprising a handle connected
to a blade holder portion, a shank having a narrow end portion,
said shank being interfitted with said blade holder portion to form
a blade holder assembly, said blade holder assembly having adjacent
one end thereof two closely spaced blade shields parallel to one
another and extending vertically from said assembly and an opening
adjacent to but spaced from said shields, said opening being
adapted to receive with an interference fit a key of a blade
injector cartridge, and said blade shields having unobstructed
blade inject and blade eject areas adjacent their ends.
2. The invention as set forth in claim 1 wherein said blade holder
portion has a pair of spaced, parallel legs adjacent one end
thereof and has adjacent the other end thereof, a bottom, side
walls extending upwardly from said bottom and spaced apart a
sufficient distance to receive the narrow end portion of said
shank, and inwardly sloped portions integral with said side walls,
said blade shields being integral with and extending upwardly from
said sloped portions.
3. The invention set forth in claim 2 wherein said opening for a
key of a blade injector cartridge is defined by said blade holder
bottom and side walls and the narrow end portion of said shank.
Description
BACKGROUND OF THE INVENTION
This invention relates to a razor, and more particularly to a razor
of the so-called straight razor type, but which is adapted for use
with injector razor blades.
Straight razors, which generally comprise a handle and pivotally
attached blade, have been in use for many years. The so-called
safety razors are also well known. Safety razors utilize a single
or double-edged blade firmly held in a housing having a handle with
only the cutting edge or edges of the blade exposed. Various
proposals have been made for hybrid type razors which are like the
conventional straight razor except that they have a blade holder
portion which carries a removable blade. This invention relates to
such a straight razor adapted to be used with commercially
available injector blades.
The injection of blades from presently available injector
cartridges into the razor of this invention presents a problem,
since the cartridges are constructed so as to eject blades in a
plane perpendicular to the plane of the cartridge stem or key. To
inject blades from such a cartridge into the blade holder of this
invention necessitates that the cartridge eject the blades in a
plane parallel to or coplanar with the plane of the cartridge key.
This problem is solved by a new cartridge or cartridge adapter as
illustrated generally in FIG. 3, and which is the subject of a
separate patent application filed simultaneously herewith.
SUMMARY OF THE INVENTION
In one form, a razor according to this invention has a handle
connected to a blade holder portion. Adjacent one of its ends, the
blade holder portion has two closely spaced blade shields and an
opening which is adjacent to but spaced from the blade shields.
That opening is adapted to receive a key of a blade injector
cartridge with an interference fit therebetween. The areas adjacent
to the ends of the blade shields are unobstructed. The razor may
receive injector blades directly from their cartridge.
BRIEF DESCRIPTION OF THE DRAWING
Apparatus in accordance with this invention is illustrated in the
accompanying drawing in which:
FIG. 1 is a perspective view of a straight razor adapted for use
with injector blades;
FIG. 2 is a side elevation of the razor in the closed or collapsed
position;
FIG. 3 is an exploded perspective view showing the components of
the blade holder assembly;
FIG. 4 is a fragmentary perspective view of the razor showing an
injector cartridge adapted for use therewith; and
FIG. 5 is an enlarged fragmentary section taken on line 5--5 of
FIG. 4.
DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT
The razor 10 has a handle 12, a shank 14, and a blade holder
portion 16. Shank 14 and blade holder 16 fit together to form a
blade holder assembly. Handle 12, shank 14 and blade holder portion
16 are pivotally interconnected as by a pivot pin 18. Handle 12 has
sides 20 which are spaced apart and held together, as by spacer 21
and fastener 23, so as to permit the shank and blade holder to fit
partially between sides 20 when the razor is in the closed position
illustrated in FIG. 2.
As best seen in FIG. 3, the blade holder portion 16 has spaced
apart legs 22 with aligned openings 24 therein adjacent one end.
Adjacent the opposite or blade carrying end, the holder 16 has a
bottom 26, two upwardly extending side walls 28 with inwardly
sloped portions 30 which are formed into two closely spaced
vertically extending blade shields 32. When shank 14 is fitted
between the legs 22, an opening 25 in shank 14 is aligned with
openings 24. The end of shank 14 opposite opening 25 has a narrow
end portion 27. The pivot pin 18 passes through each of the
openings 24 and 25 and through openings in sides 20 of handle 12 to
interconnect the handle 12, shank 14, and blade holder 16. The pin
18 is secured as by a fastener 29. As best seen in FIGS. 4 and 5,
an opening 34 in holder 16, spaced below shields 32, is defined by
the bottom 26, side walls 28, and the narrow end portion 27 of
shank 14. The depth of opening 34 is determined by the length of
the end portion 27. Opening 34 is adapted to receive a stem or key
of a blade injector cartridge. Blade shields 32 are sufficiently
close together and of sufficient rigidity to securely hold an
injector razor blade 36 therebetween, yet sufficiently flexible to
be moved slightly farther apart when a stem or key 38 of a blade
injector cartridge 40 is inserted in the opening 34. An
interference fit between key 38 and opening 34 is provided for this
purpose. The blade inject area 50 adjacent the key receiving end of
the blade holder is free of obstructions so as to provide an
unobstructed blade injection area.
One of the shields 32 is provided with a pair of inwardly
projecting bosses 42 aligned and spaced apart so as to snap into
the elongated holes 43 which are formed in standard injector
blades. The shields 32 and bosses 42 along with the holes 43 in the
blade, serve to position and securely hold the blade 36 in proper
position for use. When a change of blades is desired, a key 38 of
cartridge 40 is inserted into opening 34. The interference fit
between the key and the opening causes the blade shields 32 to
spread apart slightly. By operating the blade loader or cartridge
slide 44 in the usual manner a new blade is pushed into the space
between blade shields 32 forcing the old blade out at the end 46.
The ejection end 46 is free of obstructions so as to provide an
unobstructed blade ejection area 48. When the key is removed from
opening 34, the blade shields 32 and bosses 42, together with holes
43 in the blade, again serve to hold the new blade firmly in the
proper position for use.
* * * * *