This invention relates to a knife for household and professional
uses, of a type which comprises a handle consisting of a rigid core member with
an outer covering. As is known, widespread acceptance are currently enjoying knives
of the so-called soft handle type, which are utilized not only for professional
applications, for which they were originally intended, but also in household environments.
The handle of such knives usually consists of a core member, made
of a rigid synthetic plastic material molded around the knife blade metal tang,
and a covering of a soft and pliant elastomeric material molded over the rigid
While being generally satisfactory especially from the standpoint
of their performance, conventional soft-handled knives are deficient from the sanitary
standpoint. In fact, crevices and voids tend to form in the areas of attachment
of the soft covering material to the rigid core material wherein liquids and organic
residue matter are retained which are difficult to remove, even by repeatedly washing
the knife; as a result, such residual matter creates, in decomposing, dangerous
The problem underlying this invention is to provide a knife of the
type outlined above, which has such constructional and performance features as
to overcome the drawbacks affecting the prior art as discussed hereinabove.
This problem is solved, according to the invention, by a knife as
indicated being characterized in that said covering fits removably over said core
Advantageously according to the invention, this knife also comprises
means of retaining the covering in its fitted position over the core member.
Further features and the advantages of a knife according to the invention
will become apparent from the following detailed description of a preferred embodiment
thereof, to be taken by way of illustration and not of limitation in conjunction
with the accompanying drawings.
In the drawings:
- Figure 1 is a fragmentary exploded view in perspective of a knife according
to this invention;
- Figure 2 is a part-sectional view of the knife shown in Figure 1;
- Figure 3 is a part-sectional side view of the knife shown in Figure 1; and
- Figure 4 is a sectional view of the inventive knife, taken along the line IV-IV
in Figure 3.
With reference to the drawing figures, the numeral 1 generally designates
a knife for household and professional uses, which comprises a steel blade 2 associated
with a handle 3 as explained hereinafter.
The blade 2 has a plate-like tang 4 formed integrally therewith.
The handle 3 comprises a core member 5 of a rigid synthetic plastic
material, molded around the tang 4.
Advantageously, two hollowed portions 6 and 7 are provided lenghtwise
in the core member 5, respectively along opposed major sides 5a and 5b thereof.
The handle 3 further comprises a covering 8 molded from a soft elastomeric
material, such as a thermoplastic rubber, and fitted removably over the core member
5. In accordance with this invention, the covering 8 is composed of a cap-like
body wherein an axial recess 9 is formed which is open at a forward end 8a and
configured to receive the core member 5 in matching shape relationship.
The knife 1 also comprises a means 10 of retaining the covering 8
in its fitted position over the core member 5; this retainer means 10 advantageously
consists of a pin 11 adapted to fit removably into a seat 12, formed in the core
member 5, by going through apertures 13,14 provided in the covering 8.
The pin 11 has a head 15, slotted as at 16, a cylindrical stem 17,
and a lug 18 projecting transversely from the stem 17, all these parts being a
unitary construction. Indicated at 19, moreover, is a portion of said pin 11 which
is integral with the stem 17 at the head 15 and forms an angular protrusion on
the stem 17.
A bevel 20 is formed on the side 5b of the core member 5, at a free
end 5c of the latter.
The seat 12 is formed crosswise in the core member 5, in the proximity
of the free end 5c, extends from the side 5a to the bevel 20, and has a shape matching
that of the cylindrical stem 17/angular protrusion 19 combination on the pin 11.
Furthermore, the core member 5 is formed with an opening 21 in communication with
the seat 12 to accommodate the lug 18 as the pin 11 is introduced into the seat
It should be also noted that the pin 11 section lying between the
lug 18 and the head 15 has a greater length than the seat 12, thereby, after the
pin 11 is introduced into the seat 12, the lug 18 is left free to turn within the
The circular, coaxial apertures 13 and 14 are provided in opposed
sides of the covering 8, at a location close to to a rearward end 8b thereof, respectively
at the seat 12 and the bevel 20. More specifically, the diameter of the aperture
13 is the same as that of the head 15, and the diameter of the aperture 14 is
the same as that of the stem 17 of the pin 11.
According to this invention, the handle 3 is assembled to the knife
1 by fitting the covering 8 over the core member 5, to then lock it in its fitted
position over the core member by inserting the pin 11 through the aperture 13 into
the seat 12.
Thereafter, the pin 11 is turned until, by virtue of its portion
19, the pin snaps into the seat 12 and is locked therein by its lug 18 locating
itself, after being pushed past the seat 12, within the bevel 20, thereby the pin
11 is prevented from slipping out unintentionally.
To remove the covering 8 from the core member 5 of the handle 3,
the same procedure is followed in the reverse order.
As a result, the knife for household and professional uses, according
to this invention, has been provided with a quickly demountable handle which can
then be easily and thoroughly washed clean to meet the strictest of sanitary criteria.
It is important to observe that the hollowed portions in the handle
rigid core member and facing toward the soft covering afford improved deformability
for the covering, thereby enhancing the resilient effect and soft-contact property
of the handle while leaving its strength properties unaffected.