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Патент USA US3088213

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May 7, 1963
A. H. F. PERL
’
CAN OPENERS
Filed April 10, 1961
3,088,203
aessas
Patented May 7, 1963
1
3,088,203
Albert Henry Franks Perl, Norton, Stourhridge, England,
assignor to Joseph Billingham Limited, Cradley Heath,
CAN OPENERS
2
along part of its length producing a bifurcated portion
7 with the two limbs having parallel outwardly presented
substantially right angled edges 8 which curve inwards
towards the end of the hand to meet the inner edges of
the limbs. The bifurcated portion 7 is shaped by thev
pressing operation in such a way that the distance be
Filed Apr. 10, 1961, Ser. No. 101,763
tween the outwardly presented edges 8 and the ends of
Claims priority, application Great Britain Apr. 13, 1969
the limbs is substantially less than the distance between
4 Ciaims. (Cl. 30-~23)
the inner edges of the limbs and the normal Width of
This invention relates to a can opener of the scissors 10 the channel section of the remainder of the handle.
The second handle member 6 is pivotally connected to the
type which is provided with a piercing blade to pierce
bifurcated end 7 of the ?rst handle member 5- by a rivet
the can initially and allow a cutting blade of the scissors
9, which passes through holes provided through the Walls
to be inserted and which has adjacent and at right angles
of the second handle member and lugs 10 formed on the
to the piercing blade a hook or hooks. The can opener
is applied to the can in such a way that the edge of 15 inner edges of the ?rst handle member, which extend
between the walls of the second handle member and a
the can is engaged by the hook or hooks and the piercing
spacing member 11 provided between the lugs 10 and
blade is below the level of the hooks and opposite the
the ends of the limbs of the bifurcated portion 7 of the
side of the tin. To pierce the can the opener is rotated
?rst member.
’
about the line of engagement of the hooks and can to
A cutting blade 12 is pivotally connected at an inter
force the piercing blade through the wall of the can. 20
mediate point to an intermediate point in the ?rst handle
Such a can opener is hereinafter referred to as of the
member 5 to oscillate about an axis 13 and so that it lies
kind described.
between the limbs of the bifurcated portion. This cut
The present invention consists in a can opener of the
Sta?ordshire, England, a company of Great Britain
ting blade 12 is ?at throughout and is made in the form
kind described wherein the piercing and cutting blades
are both ?at and each is separate from the other and 25 of a blank from high carbon steel sheet, that is to say
steel having a carbon content of between 0.6% and
made without bending by cutting in the form of a blank
1.2%, and has an inwardly extending arm 14 and an
from sheet or strip metal, the piercing and cutting blades
outwardly extending arm 15 with an inwardly presented
being mounted on the structural members of the can
cutting edge 16. The cutting edge 16 is knife edged that
opener.
This invention enables each of the separate components 30 is, it is of acute-angle cross-section bounded by oppositely
inclined chamfered flanks and is substantially straight
of the can opener to be made from the most suitable
for the greater part of its length but near the end of arm
materials, for example hardened high carbon steel for
15 it curves outwardly towards the outer edge of the
arm and meeting that edge to form a point 17 at the
tile steel suitable for press-work for the structural mem
bers. Bending and other deformation operations which 35 end of the arm. A link 18 is pivoted at one end 19 to
the free end of the inwardly extending arm 14 and piv
are difficult and unsatisfactory on hard materials are
oted at the other end 20 to the second handle member
avoided in the manufacture of the cutting components.
6 near its pivotal connection to the ?rst handle member,
The use of these more costly materials can be con?ned
thus forming a compound linkage between the handles and
to components for which they are really necessary and
the cutting components can be of relatively simple shape 40 the cutting blade 12. The link 18 is of channel section
the cutting parts and the hook or hooks and a more duc
so avoiding complications in sharpening.
An embodiment of the invention will now be described
by way of example with reference to the accompanying
drawings in which,
FIGURE 1 is a cross-section of a can opener accord
ing to the present invention.
FIGURE 2 is a plan view of a piercing blade.
FIGURE 3 is a perspective view of the can opener in
the initial position for piercing the wall of the can.
having its open side facing the pivotally connected ends
of the handles. The outside dimension of the section is
slightly less than the inside dimension of the handles
along the greater part of its length. The limbs of the
45 portion of the link adjacent its end 19 are pressed in
wardly close to the end of the inwardly extending arm
14 of the blade, which is pivotally connected to the link
between the limbs by a pivot 22, to prevent axial move
ment of the arm between the limbs of the link and the
FIGURE 4 is a fragmentary view of the can opener in 50 end portion of the base is cut away to provide a recess
the process of piercing the Wall of the can.
FIGURE 5 is a perspective view of the can opener cut
ting the wall of the can.
The can opener, as shown in the drawings, is of the
21. At the other end 20 of the link the base of the
channel is cut centrally for a length approximately equal
to the depth of the channel section and the two halves of
the base so formed are turned back to form extensions of
scissors type and has a pair of channel section handles 55 the limbs and leaving a recess 23 in the base of the link
the end of which is between the two pivoted axes of the
5 and 6 which are pivotally connected adjacent one end
with the open faces of the channel opposing each other.
link.
The handles are urged apart by spring means provided
The handles 5 and 6 are formed by a pressing operation
by a square section bar spring 24 which is anchored at
from a ductile sheet or like metal producing the channel
section and curving the handles along their length as 60 one end 25 to the free end of the second handle mem
ber. The anchorage is provided by the engagement of
shown in FIGURE 1, the width of the channel and the
the end 25 of the spring, which is curved outwardly to
curve of the handles affording a comfortable hand grip
form a shallow hook shaped portion as shown in FIG
for the user whilst operating the can opener. The ?rst
URE 1, with an inwardly directed loop 44 formed in
handle member 5 has the base of the channel removed
3,088,203
3
4
the member between a pair of openings 45 cut in the
base of the channel of the member. At the other end the
spring bears against the end of the recess 23 formed in
the link 18 and extends su?iciently between the limbs
ing blade opposite the pointed end engages slots 39,
FIGURE 1, provided in the lugs 10 adjacent the inward
ly presented edges of the ?rst handle member.
The hook and piercing blade assembly described is a
to prevent its becoming disengaged. The spring 24 tends
preferred form but in an alternative assembly a single
to urge the handle members apart by virtue of its being
central hook member could be mounted in a plane par
bent concavely round the curved portion 26 of the sec
allel to that of the two said hook members and passing
ond handle member between its anchored end and the
through the apex of the blade.
end which engages the link. A stop limits the extent
To open a can, the opener, preferably with the handle
of the separating movement of the handle members. 10 members closed together, is ?rst applied to the can, as
This is provided by a projection 27 which is formed at
shown in FIGURE 3, in such a way that the rim of the
the end of the inwardly extending arm'of the blade and
can, as indicated by reference 40 in the. drawing, is en
which engages the end of the recess 21 at the end 19 of
gaged by the hooks and the piercing blade is below the
the link when the handle members reach their required
level of the hooks and opposite the side 41 of the can.
separation'limit and further outward movement of the 15 To pierce the can the opener is swung down about the
members is prevented. By means of the compound link
line of engagement of the hooks and rim 40 in the direc
age, movement of the handle members towards one an
tion indicated by the arrow to force the piercing blade
other causes the cutting edge of the blade to enter into
through the wall 41 of the can, as shown in FIGURE 4,
the gap between the edges 8 of the limbs of the bifurcated
producing a trangular shaped opening 42 through the
portion 7 in a scissor action cutting the material which 20 wall 41 just below the rim. The pierced opening 42
is extended across the gap. Because the handle mem
is su?iciently wide to enable the cutting blade tov pass
bers are spring urged apart the cutting edge is normally
easily into position for cutting, when the handles are re
outside the gap. However a catch 28 pivotally mounted
leased from the closed position. Cutting is done with
at an intermediate point in a cut-away portion 29‘ of the
a scissor action round the wallet the can, as shown in
face of the ?rst handle member can be moved so that 25 FIGURE 5, in a clockwise or counter clockwise direction
a sear 30 formed in the catch engages an open-ended slot
whichever the user ?nds more convenient. The gap be~
31, provided in the inwardly extending arm of the blade,
when the handle members are brought’ towards each
other. The slot 31 is radial to the pivotal axis 13, and
tween the outwardly presented edge-s 8 of the bifurcated,
end of the ?rst handle and the cutting blade is such that
the material extending across the gap is bent into the gap
holds‘the can opener in the closed position against the 30 between the limbs before actually being cut. This action
action of the spring 24.
produces an outwardly directed lip 43, as shown in
A ?at piercing blade 32 of substantially pentagonal
FIGURE 5, round the wall of the can and on each side
shape, as shown in FIGURE 2, is made from high carbon
of the cut. To prevent the can slipping from between
steel sheet and is formed with a pair of cutting edges 33‘
the cutting blade and the outwardly presented edges 8v
meeting in a point, each edge making the same angle 35 during the cutting operation the edges 8 may be serrated.
with the major axis of the piercing blade so that in plan
What I claim is:
view the piercing blade resembles a rectangle with an ob
tuse angled isosceles triangle constructed on one side as
1. A can opener comprising in combination a ?rst
handle member having a portion bifurcated at one end
base. In both sides of the rectangular portion of the
to form two limbs having parallel outwardly presented,
piercing blade adjacent to the side on which the triangle, 40 concavely curved edges, a second handle member piv
A pair of hook
oted at one end to the bifurcated end of said ?rst handle
members 35 are also ?at and blanked from high carbon
sheet steel, each having a pair of notches 36, comple
mentary in width to the sheet thickness of the piercing
is constructed recesses 34 ‘are formed.
member, a ?at cutting blade lying between the limbs of
said bifurcated portion and pivoted at an intermediate
blade, directly opposite each other cut into opposite side
edges of the member, leaving a width of metal between
the ends of the recesses 36 su?icient for the member to
be received into the recess 34 provided in the piercing
blade. The arrangement is such that the piercing blade
point to an intermediate point on said ?rst handle mem
ber and having an inwardly extending arm provided in
its edge adjacent said ?rst handle member with an open
ended slot radial to said pivot of the blade and ?rst han
dle member, and an outwardly extending arm with a
substantially straight inwardly presented, knife-edged cut
and the hook members are separably joined together by 50 ting edge, a link pivoted at one end vto the free end of
a double H-type joint which prevents movement of the
said inwardly extendingv arm. and pivoted at its. other
hook members separately from‘ the piercing blade in the
end to said second handle member, spring means urging
planes normal to the blade and parallel to its main axis.
the handle members apart and a catch pivotally mounted »
The hook members 35 are assembled parallel to each
on said ?rst handle member and having a sear engage
other and normal to the surface of the piercing blade 55 able in the closed position of the handle members with
said open-ended slot.
and close to its apex, so that the hooks over-lie one
face of the blade, and are directed towards the apex as
shown in the drawings.
The hook and piercing blade
2. A can opener comprising in combination a ?rst
handle member having a portion bifurcated at one end to
assembly is mounted on the bifurcated end of the ?rst
handle member so that the apex of the blade and the
a second handle member pivoted at one end to said‘bi
hooks are directed forwards that is, away from the axis
furcated end, a cutting blade lying between the limbs
of the handle,the surface of the piercing blade opposite
to that which the hooks overlie bearing against the in
form two limbs having parallel outwardly presented edges,
of _said bifurcated portion and pivoted at an intermediate
point to an intermediate point in said ?rst handle mem
ber and having an inwardly extending arm and an out~
wardly presented edges of the handle member between
the lugs 10 and the end vof the limbs and against the spac 65 wardly extending arm with an inwardly. presented cut
ing member 11, the edges and the spacing member pro
ting edge, a link pivoted at one endto said free, end of.
viding a ?at surface supporting the piercing blade. The
the inwardly extending arm and pivoted at the other end
tails of the hook members 37 on that side of the piercing
to said second handle member near its pivoted connec
blade which bears against the inwardly presented edges _
tion to said ?rst handle member, spring means urging
and the spacing member straddle the end of the handle 70 said handle members apart and a stop limiting the extent
member and the assembly is secured by a rivet 38 which
of such separating-movement, movement of said handle
passes through this portion of the hook members, the
members towards one anothercausing the entry of said
limbs of the handle and the spacing member 11. To
cutting edge into the gap between the edges ofsaid limbs
prevent possible rotation of the assembly about the rivet
in scissor action.
38 when the piercing blade is in use, the end of the pierc 75
3. A can opener comprising in combination: a ?rst
3,088,203
5
point to an intermediate point on said ?rst handle mem
said handles and said linkage means for releasably retain
ing said handle members together against the action of
her and having a sharpened cutting edge cooperating in
said spring means.
handle member; a cutting blade pivoted at an intermediate
scissor-like action with at least one edge of said ?rst han
dle member; a second handle member pivoted on said
?rst handle member; and linkage means interconnecting
said cutting blade and said ?rst and second handle mem
bers for actuating said cutting blade with mechanical ad
vantage.
4. A can opener according to claim 3 and further com 10
prising: spring means connected between one of said han
dles and said linkage means for urging said handle mem
bers apart; and catch means positioned between one of
References Cited in the ?le of this patent
UNITED STATES PATENTS
567,722
1,560,397
2,002,173
2,525,884
2,723,451
Pike ________________ __ Sept. 15,
Perl et a]. ____________ __ Nov. 3,
Dougherty ___________ ___ May 21,
Forcum _____________ __ Oct. 17,
Frank ______________ __ Nov. 15,
1896
1925
1935
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1955
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