CA1205623A - Can openers - Google Patents
Can openersInfo
- Publication number
- CA1205623A CA1205623A CA000425119A CA425119A CA1205623A CA 1205623 A CA1205623 A CA 1205623A CA 000425119 A CA000425119 A CA 000425119A CA 425119 A CA425119 A CA 425119A CA 1205623 A CA1205623 A CA 1205623A
- Authority
- CA
- Canada
- Prior art keywords
- handle
- spigot
- handles
- wheel
- axis
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67B—APPLYING CLOSURE MEMBERS TO BOTTLES JARS, OR SIMILAR CONTAINERS; OPENING CLOSED CONTAINERS
- B67B7/00—Hand- or power-operated devices for opening closed containers
- B67B7/30—Hand-operated cutting devices
- B67B7/34—Hand-operated cutting devices with rotatable cutters
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Devices For Opening Bottles Or Cans (AREA)
Abstract
A B S T R A C T
The can opener disclosed comprises a pair of handles which are hinged to one another and which are movable between an open position for fitting onto a can and a closed cutting position. A manually rotatable drive wheel engages the rim of a can and upon rotation advances the opener around a can bringing a knife to a cutting position relative the drive wheel as the handles are brought to the closed position. The knife is a circular cutting wheel (16) rotatably mounted on one handle (12) with its axis displaced from the axis of hinging. The other handle (14) has an upstanding cylindrical spigot (26) extending through a corresponding hole (28) in the said one handle (12) and about which the said one handle (12) is hinged relative the said other handle (14). A
support (23) for the drive wheel (20) passes through and is rotatably born in the spigot (26) with the axis of rotation of the drive wheel (20) displaced from the axis of the spigot (26). Such a can opener will provide a good clean cut even if the can is damaged.
The can opener disclosed comprises a pair of handles which are hinged to one another and which are movable between an open position for fitting onto a can and a closed cutting position. A manually rotatable drive wheel engages the rim of a can and upon rotation advances the opener around a can bringing a knife to a cutting position relative the drive wheel as the handles are brought to the closed position. The knife is a circular cutting wheel (16) rotatably mounted on one handle (12) with its axis displaced from the axis of hinging. The other handle (14) has an upstanding cylindrical spigot (26) extending through a corresponding hole (28) in the said one handle (12) and about which the said one handle (12) is hinged relative the said other handle (14). A
support (23) for the drive wheel (20) passes through and is rotatably born in the spigot (26) with the axis of rotation of the drive wheel (20) displaced from the axis of the spigot (26). Such a can opener will provide a good clean cut even if the can is damaged.
Description
~2~S~3 This invention relates to can openers.
BACKGROU~D TO THE INVENTION
Metal cans generally comprise a cylindrical portion closed at both ends with a circular lid. The lid is usually fixed in place by providing an upstanding rim around the edge oE the lid which is bent down in an inverted U-shape to clamp onto the end of the cylinder.
Existing can openers make a circular cut around the lid near its edge but within the upstanding rim. There are however difficulties in obtaining a good clean cut if the can is in any way damaged.
It is therefore an object of the invention to provide an improved can opener.
BRIEF SUMMARY OF THE lNV~;N~l~ION
According to the invention there is provided a can opener comprising a pair of handles which are hinged to one another to be movable between an open position for fitting onto a can and a closed cutting position, a manually rotatable drive wheel which engages the rim of a can and upon rotation advances the opener around a can, a knife hrought to a cutting position relative the drive wheel as the handles are brought to the closed position, the cutting kni~e being a circular cutting wheel rotatably mounted on one handle with its axis displ~ced from the axis of hinging, the other handle having an upstanding cylindrical spigot extending through a corresponding hole in the said one handle and about which the said one handle is hinged relative the said other handle, and a support for the drive wheel passing through and rotatably born in the spigot with the axis of rotation of the drive wheel displaced from the axis of the spigot.
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~IL2~)56'~3 Such a can opener is simple yet effective and apart from the cutter wheel and drive wheel can largely be made from simple plastics material parts. Also the cutter wheel gives a cutting as opposed to tearing action which occurs with many existing can openers. Because of this it is not usually necessary for the cutter wheel to be resiliently mounted~
Preferably the two handles are of generally same shape so that when they are brought to the closed cutting position, one generally overlies the other and they can be grasped by the user effectively as a single handle.
The can opener of the invention has the advantage that it is equally suitable for use by left-handed and right-handed people. Thus the opener can be symmetrical both in construction and shape about the axis of pivoting of the handles in the rotational sense and about the longitudinal axis of the handles.
Such a can opener is simple and comfortable to use and gives a circular closed cut around the can even if the edge of the can is somewhat damaged.
Preferably the cut which is made is a cut near the edge of the cylindrical part of the can but just below the lid so that when a complete circular cut i5 made, the lid and a small portion at the end of the cylindrical part of the can is removed. It is found that such a cut can be a relatively clean cut even in the event that the lid has been damaged.
To assist in using the can opener in this way, the handle portion carrying the cutting wheel preferably has an abutment on îhe opposite side of the drive wheel from the cutting wheel, the abutment being designed to ~2~.~6~3 engage the lid of the can and keep the can opener level with the cutting wheel at right angles to the cylindrical surface of the can whilst a cut is being made.
An advantage of the can opener when used this way seems to be that there is good support for the metal o~: the can in the region where the cut is being made.
Thus in a conventional can opener when a cut is made downwardly around the edge of the lid, it is necessary to squeeze the can opener very tightly to force the cutting edge into the metal. In the event of any defects in the can it will frequently happen that the material of the can will be distorted by but will not be penetrated by the cutting edge. On the other hand~ the drive wheel and the upstanding rim of the can will tend to support the material of the can in the region where it is being cut by the circular cutting wheel and so this will tend not to distort but will be cut cleanly.
Further the cutting action is along the direction of the cutter wheel unlike conventional can 2G openers where a curved cut is made and in such cases considerable friction forces can be created.
In one aspect of the present inventicn there is provided a can opener comprising a pair of handles, an upstanding spigot on one handle near one end of the handle, the spigot having an axis, a corresponding opening near one end of the other handle into which the spigot projects and is rotatably journalled about the axis of the spigot, whereby the handles can hinge about said spigot between an open position for fitting onto a can and a closed cutting position, the handle having generally the same shape and size so that, when the handles are in the closed cutting position, they can be grasped by the user effectively as a single handle, A
~S6~3 a manually rotatable drive wheel for engaging the rim of a can and rotatably advancing the opener around a can, the drive wheel having an axis of rotation extending through the spigot but displaced from the axis of the spigot, and a circular cutting wheel rotatably mounted on one handle about an axis displaced from the axis of the spigot and arranged to be brought to a cutting position relative the drive wheel as the handles are brought to the closed position.
In a further aspect of the present invention there is provided a can op~ner comprising a pair of handles, an upstanding spigot on one handle near one end of said handle, the spigot having an axis, a corresponding opening near one end of the other handle into which the spigot projects and is rotatably journalled about the axis of the spigot, whereby the handles can hinge about the spigot between an open position for fitting onto a can and a closed cutting position, the handles having generally the same shape and size so that, ~hen the handles are in the closed cutting position, they can be grasped by the user effectively as a single handle, 2Q a manually rotatable drive wheel for engaging the rim of a can and rotatably a~vancing the opener around a can, the drive wheel having an axis of rotation extending through the spigot but displaced from the axis of the spigot, a circular cutting wheel rotatably mounted on one handle about an axis displaced from the axis of the spigot and arranged to be brought to a cutting position relative the drive wheel as the handles are brought to the closed position; and an abutment provided on the one handle which is arranged to rest on the lid of a can during opening to keep the opener level during use-56.23 - 3b -BRIEF DESCRIPTION OF THE DRAWINGS
An example of the can opener according to the invention will now be described with reference to the accompanying drawings, in which:
Figure 1 is an elevation of the can opener;
Figure 2 is an elevation showing the opener in its open position;
Figure 3 is a side view showing the can opener in operation in opening a can; and Figure 4 is a section through the can openerO
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DFSCRIPTION OF THE PREFERRED EMBODIMENT
The can opener 10 shown in the drawings comprises a pair of handles 12 and 14 made of synthetic plastics material. On the handle 12 is rotatably mounted a circular cutting wheel 16 having a sharp cutting edge 18. A rotatable toothed drive wheel 20 is attached to a metal strip 22 which is in turn embedded in a spigot 23 integrally formed with a manually turnable knob 24. A
metal washer 25 is provided between the knob 24 and the handle 14.
The handle 14 has an integrally formed spigot 26 which projects through a circular hole 28 in the handle 12. This spigot rotatably supports the handle 12 relative the handle 14 and it is about this spigot 26 that the handles 12 and 14 can be moved relative one another between their closed operating position shown in Figure 1 and their open position shown in Figure 2 prior to clamping onto a can.
The spigot 23 supporting the wheel 20 passes through the spigot 26 but not coaxially therewith. Thus, the axis of rotation of the toothed drive wheel is displaced by a small amount from the axis of the spigot 26. In this way when the can opener is in the open position shown in Figure 2, the drive wheel 20 is somewhat spaced from the edge of the cutting wheel 1~ but when the handles are brought to the closed position shown in Figure 1, it will be noted that the drive wheel overlaps with the edge of the cutting wheel 16. When the can opener is mounted onto a can and brought to the closed position this approach of -the drive wheel towards the cutting wheel ~2~S6~3 causes the edge of the cutting wheel to penetrate into the material of the can as best shown in Figure 3.
A threaded metal stud 30 is embedded in a pillar 32 integrally formed with handle 12 and on that stud the cutting wheel 16 is mounted. A nut 34 retains the wheel 16 in place and a spacer 36 maintains the cutting edge 18 just clear of the drive wheel 20.
In order to protect the material of the handle 12, a metal plate 38 is embedded in the part of the handle 12 beneath the wheels 16 and 20.
It will be noted that the two handles 12 and 14 are of approximately the same shape and size so that when they are brought to the closed position shown in Figures 1, 3 and 4, they generally overlie one another so that the user can grasp both nandles together as in effect a single piece. This gives a comfortable holding position during operationO Further, the user can maintain the two handles together very easily in this way, at the same time maintaining the clamping action between the drive wheels and cutting wheel which causes the cutting wheel to penetrate into and cut the can cleanly during operation without the user having to exert a large and uncomfortable gripping force between the handles.
The handle 12 has a forwardly projecting notch 40 at its end. This notch engages and rests on the lid of a can during use and assists in guiding the can opener and ~eeping the cutting wheel at right angles to the surface of the can.
An integral upstanding arcuate lip 42 projects from the handle 12 to act as a guard to prevent the user from accidentally touching the sharp cutting edge 18.
~l2~S6~3 Figure 3 shows the can opener in use in opening a can.
First of all the opener 10 in the open position shown in Figure 2 is brought to a position on top of a can 45 to be opened with the drive wheel 20 inside the rim 46 of the can and the cutting wheel 16 outside. Then the handles 12 and 14 are hinged together to the closed position shown in Figures 1 and 3. As explained above, this causes tne wheel 20 and edge 18 to overlap and so the edge penetrates into the metal of the can. The knob 24 is then turned with one hand, whilst the handles are held together with the other hand, to cause the wheel 20 to drive the opener around the can so causing the edge 18 to make a cut along the line ~8. Once the cut has been completed all the way around the can, the severed lid 50 and rim 46 can be lifted up with the can opener from the can and upon opening of the handles 12 and 14 the severed lid 50 and rim 46 separated from the can opener. It is an advantage that the severed part of the can cannot fall or bend into the opened can as can be the case with the severed lid when using a conventional can opener.
Contrary to conventional can openers the can opener 10 forms a cut around the edge of the cylindrical part of the can just beneath the lid. Because the cutting edge 18 is not significantly displaced from the drive wheel 20 in the axial sense, the drive wheel 20 gives substantial support to the rear of the rim 46 of the can so that it is not easy for the metal of the can to be merely distorted by the cutting wheel and not cut.
Therefore, a clean cut is given as the can opener i5 ~2~ 3 orbited around that ed~e of the can upon rotation by the knob of the drive wheel.
A latitude of modification, change and substitution is in-tended in the foregoin~ disclosure and in some instances some features of the invention will be employed without a correspondin~ use of other features.
Accordin~ly, it is appropriate that the appended claims be construQd broadly and in a manner consistent with the spirit and scope of the invention herein.
BACKGROU~D TO THE INVENTION
Metal cans generally comprise a cylindrical portion closed at both ends with a circular lid. The lid is usually fixed in place by providing an upstanding rim around the edge oE the lid which is bent down in an inverted U-shape to clamp onto the end of the cylinder.
Existing can openers make a circular cut around the lid near its edge but within the upstanding rim. There are however difficulties in obtaining a good clean cut if the can is in any way damaged.
It is therefore an object of the invention to provide an improved can opener.
BRIEF SUMMARY OF THE lNV~;N~l~ION
According to the invention there is provided a can opener comprising a pair of handles which are hinged to one another to be movable between an open position for fitting onto a can and a closed cutting position, a manually rotatable drive wheel which engages the rim of a can and upon rotation advances the opener around a can, a knife hrought to a cutting position relative the drive wheel as the handles are brought to the closed position, the cutting kni~e being a circular cutting wheel rotatably mounted on one handle with its axis displ~ced from the axis of hinging, the other handle having an upstanding cylindrical spigot extending through a corresponding hole in the said one handle and about which the said one handle is hinged relative the said other handle, and a support for the drive wheel passing through and rotatably born in the spigot with the axis of rotation of the drive wheel displaced from the axis of the spigot.
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~IL2~)56'~3 Such a can opener is simple yet effective and apart from the cutter wheel and drive wheel can largely be made from simple plastics material parts. Also the cutter wheel gives a cutting as opposed to tearing action which occurs with many existing can openers. Because of this it is not usually necessary for the cutter wheel to be resiliently mounted~
Preferably the two handles are of generally same shape so that when they are brought to the closed cutting position, one generally overlies the other and they can be grasped by the user effectively as a single handle.
The can opener of the invention has the advantage that it is equally suitable for use by left-handed and right-handed people. Thus the opener can be symmetrical both in construction and shape about the axis of pivoting of the handles in the rotational sense and about the longitudinal axis of the handles.
Such a can opener is simple and comfortable to use and gives a circular closed cut around the can even if the edge of the can is somewhat damaged.
Preferably the cut which is made is a cut near the edge of the cylindrical part of the can but just below the lid so that when a complete circular cut i5 made, the lid and a small portion at the end of the cylindrical part of the can is removed. It is found that such a cut can be a relatively clean cut even in the event that the lid has been damaged.
To assist in using the can opener in this way, the handle portion carrying the cutting wheel preferably has an abutment on îhe opposite side of the drive wheel from the cutting wheel, the abutment being designed to ~2~.~6~3 engage the lid of the can and keep the can opener level with the cutting wheel at right angles to the cylindrical surface of the can whilst a cut is being made.
An advantage of the can opener when used this way seems to be that there is good support for the metal o~: the can in the region where the cut is being made.
Thus in a conventional can opener when a cut is made downwardly around the edge of the lid, it is necessary to squeeze the can opener very tightly to force the cutting edge into the metal. In the event of any defects in the can it will frequently happen that the material of the can will be distorted by but will not be penetrated by the cutting edge. On the other hand~ the drive wheel and the upstanding rim of the can will tend to support the material of the can in the region where it is being cut by the circular cutting wheel and so this will tend not to distort but will be cut cleanly.
Further the cutting action is along the direction of the cutter wheel unlike conventional can 2G openers where a curved cut is made and in such cases considerable friction forces can be created.
In one aspect of the present inventicn there is provided a can opener comprising a pair of handles, an upstanding spigot on one handle near one end of the handle, the spigot having an axis, a corresponding opening near one end of the other handle into which the spigot projects and is rotatably journalled about the axis of the spigot, whereby the handles can hinge about said spigot between an open position for fitting onto a can and a closed cutting position, the handle having generally the same shape and size so that, when the handles are in the closed cutting position, they can be grasped by the user effectively as a single handle, A
~S6~3 a manually rotatable drive wheel for engaging the rim of a can and rotatably advancing the opener around a can, the drive wheel having an axis of rotation extending through the spigot but displaced from the axis of the spigot, and a circular cutting wheel rotatably mounted on one handle about an axis displaced from the axis of the spigot and arranged to be brought to a cutting position relative the drive wheel as the handles are brought to the closed position.
In a further aspect of the present invention there is provided a can op~ner comprising a pair of handles, an upstanding spigot on one handle near one end of said handle, the spigot having an axis, a corresponding opening near one end of the other handle into which the spigot projects and is rotatably journalled about the axis of the spigot, whereby the handles can hinge about the spigot between an open position for fitting onto a can and a closed cutting position, the handles having generally the same shape and size so that, ~hen the handles are in the closed cutting position, they can be grasped by the user effectively as a single handle, 2Q a manually rotatable drive wheel for engaging the rim of a can and rotatably a~vancing the opener around a can, the drive wheel having an axis of rotation extending through the spigot but displaced from the axis of the spigot, a circular cutting wheel rotatably mounted on one handle about an axis displaced from the axis of the spigot and arranged to be brought to a cutting position relative the drive wheel as the handles are brought to the closed position; and an abutment provided on the one handle which is arranged to rest on the lid of a can during opening to keep the opener level during use-56.23 - 3b -BRIEF DESCRIPTION OF THE DRAWINGS
An example of the can opener according to the invention will now be described with reference to the accompanying drawings, in which:
Figure 1 is an elevation of the can opener;
Figure 2 is an elevation showing the opener in its open position;
Figure 3 is a side view showing the can opener in operation in opening a can; and Figure 4 is a section through the can openerO
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DFSCRIPTION OF THE PREFERRED EMBODIMENT
The can opener 10 shown in the drawings comprises a pair of handles 12 and 14 made of synthetic plastics material. On the handle 12 is rotatably mounted a circular cutting wheel 16 having a sharp cutting edge 18. A rotatable toothed drive wheel 20 is attached to a metal strip 22 which is in turn embedded in a spigot 23 integrally formed with a manually turnable knob 24. A
metal washer 25 is provided between the knob 24 and the handle 14.
The handle 14 has an integrally formed spigot 26 which projects through a circular hole 28 in the handle 12. This spigot rotatably supports the handle 12 relative the handle 14 and it is about this spigot 26 that the handles 12 and 14 can be moved relative one another between their closed operating position shown in Figure 1 and their open position shown in Figure 2 prior to clamping onto a can.
The spigot 23 supporting the wheel 20 passes through the spigot 26 but not coaxially therewith. Thus, the axis of rotation of the toothed drive wheel is displaced by a small amount from the axis of the spigot 26. In this way when the can opener is in the open position shown in Figure 2, the drive wheel 20 is somewhat spaced from the edge of the cutting wheel 1~ but when the handles are brought to the closed position shown in Figure 1, it will be noted that the drive wheel overlaps with the edge of the cutting wheel 16. When the can opener is mounted onto a can and brought to the closed position this approach of -the drive wheel towards the cutting wheel ~2~S6~3 causes the edge of the cutting wheel to penetrate into the material of the can as best shown in Figure 3.
A threaded metal stud 30 is embedded in a pillar 32 integrally formed with handle 12 and on that stud the cutting wheel 16 is mounted. A nut 34 retains the wheel 16 in place and a spacer 36 maintains the cutting edge 18 just clear of the drive wheel 20.
In order to protect the material of the handle 12, a metal plate 38 is embedded in the part of the handle 12 beneath the wheels 16 and 20.
It will be noted that the two handles 12 and 14 are of approximately the same shape and size so that when they are brought to the closed position shown in Figures 1, 3 and 4, they generally overlie one another so that the user can grasp both nandles together as in effect a single piece. This gives a comfortable holding position during operationO Further, the user can maintain the two handles together very easily in this way, at the same time maintaining the clamping action between the drive wheels and cutting wheel which causes the cutting wheel to penetrate into and cut the can cleanly during operation without the user having to exert a large and uncomfortable gripping force between the handles.
The handle 12 has a forwardly projecting notch 40 at its end. This notch engages and rests on the lid of a can during use and assists in guiding the can opener and ~eeping the cutting wheel at right angles to the surface of the can.
An integral upstanding arcuate lip 42 projects from the handle 12 to act as a guard to prevent the user from accidentally touching the sharp cutting edge 18.
~l2~S6~3 Figure 3 shows the can opener in use in opening a can.
First of all the opener 10 in the open position shown in Figure 2 is brought to a position on top of a can 45 to be opened with the drive wheel 20 inside the rim 46 of the can and the cutting wheel 16 outside. Then the handles 12 and 14 are hinged together to the closed position shown in Figures 1 and 3. As explained above, this causes tne wheel 20 and edge 18 to overlap and so the edge penetrates into the metal of the can. The knob 24 is then turned with one hand, whilst the handles are held together with the other hand, to cause the wheel 20 to drive the opener around the can so causing the edge 18 to make a cut along the line ~8. Once the cut has been completed all the way around the can, the severed lid 50 and rim 46 can be lifted up with the can opener from the can and upon opening of the handles 12 and 14 the severed lid 50 and rim 46 separated from the can opener. It is an advantage that the severed part of the can cannot fall or bend into the opened can as can be the case with the severed lid when using a conventional can opener.
Contrary to conventional can openers the can opener 10 forms a cut around the edge of the cylindrical part of the can just beneath the lid. Because the cutting edge 18 is not significantly displaced from the drive wheel 20 in the axial sense, the drive wheel 20 gives substantial support to the rear of the rim 46 of the can so that it is not easy for the metal of the can to be merely distorted by the cutting wheel and not cut.
Therefore, a clean cut is given as the can opener i5 ~2~ 3 orbited around that ed~e of the can upon rotation by the knob of the drive wheel.
A latitude of modification, change and substitution is in-tended in the foregoin~ disclosure and in some instances some features of the invention will be employed without a correspondin~ use of other features.
Accordin~ly, it is appropriate that the appended claims be construQd broadly and in a manner consistent with the spirit and scope of the invention herein.
Claims (5)
1. A can opener comprising;
a pair of plastic handles, each handle having a grasping portion with a longitudinal axis, each said grasping portion having a hollow flattened U-shaped cross-section so that when the two longitudinal axes are aligned with the handles opposed the two grasping portions provide a smoothly contoured grasping surface for the user's hand so the two grasping portions effectively act as a single piece, the one U-shape inverted relative the other to provide a hollow region between the handles;
an upstanding spigot on one of said handles, said spigot having a longitudinal axis;
a corresponding opening in the other of said handles, said spigot extending into and being rotatably journalled about said longitudinal axis of said spigot, whereby said handles can hinge between an open position for fitting on a can and a closed cutting position, a circular cutter wheel rotatably mounted on said other handle, said circular cutter wheel having a frusto-conical shape and being mounted so that said cutter wheel decreases in diameter in a direction away from said handle, said frusto-conical shape having an edge of largest diameter constituting a cutting edge;
a circular hole provided through said upstanding spigot of said one handle, said hole having an axis displaced from said longitudinal axis of said spigot, a drive spindle rotatably journalled in said circular hole;
a handle on one end of said spindle;
a dish-shaped drive wheel on the other end of said spindle, said drive wheel further comprising a central planar disc, an integral raised edge and teeth formed in said edge for frictionally engaging the inside rim of a can to be opened;
the displacement of said axis of said circular hole from said axis of said spigot being such that in said open position of said handles there is a gap between said drive wheel and said cutting wheel and in said closed cutting position and peripheries of the drive wheel and the cutter wheel overlap; and a projection integrally formed with said other handle, said projection having a flat abutment surface in a plane containing said cutting edge, the projection positioned so when the handles are in the closed position the drive wheel is between the projection and the cutter wheel so said abutment surface can rest on the lid of a can during opening to keep the cutter wheel perpendicular to the side of the can.
a pair of plastic handles, each handle having a grasping portion with a longitudinal axis, each said grasping portion having a hollow flattened U-shaped cross-section so that when the two longitudinal axes are aligned with the handles opposed the two grasping portions provide a smoothly contoured grasping surface for the user's hand so the two grasping portions effectively act as a single piece, the one U-shape inverted relative the other to provide a hollow region between the handles;
an upstanding spigot on one of said handles, said spigot having a longitudinal axis;
a corresponding opening in the other of said handles, said spigot extending into and being rotatably journalled about said longitudinal axis of said spigot, whereby said handles can hinge between an open position for fitting on a can and a closed cutting position, a circular cutter wheel rotatably mounted on said other handle, said circular cutter wheel having a frusto-conical shape and being mounted so that said cutter wheel decreases in diameter in a direction away from said handle, said frusto-conical shape having an edge of largest diameter constituting a cutting edge;
a circular hole provided through said upstanding spigot of said one handle, said hole having an axis displaced from said longitudinal axis of said spigot, a drive spindle rotatably journalled in said circular hole;
a handle on one end of said spindle;
a dish-shaped drive wheel on the other end of said spindle, said drive wheel further comprising a central planar disc, an integral raised edge and teeth formed in said edge for frictionally engaging the inside rim of a can to be opened;
the displacement of said axis of said circular hole from said axis of said spigot being such that in said open position of said handles there is a gap between said drive wheel and said cutting wheel and in said closed cutting position and peripheries of the drive wheel and the cutter wheel overlap; and a projection integrally formed with said other handle, said projection having a flat abutment surface in a plane containing said cutting edge, the projection positioned so when the handles are in the closed position the drive wheel is between the projection and the cutter wheel so said abutment surface can rest on the lid of a can during opening to keep the cutter wheel perpendicular to the side of the can.
2. The can opener of claim 1, further comprising a circular spacer washer coaxially mounted with said cutter wheel between said wheel and said other handle.
3. The can opener of claim 1, further comprising a arcuate safety lip extending from the other handle and closely spaced to a portion of the cutting edge, the safety lip positioned on the side of the cutter wheel opposite the drive wheel.
4. A can opener comprising;
a two piece handle assembly including first and second handles having elongate, flattened first and second grasping portions defining generally flat first and second outer surfaces respectively;
the first handle having a generally cylindrical spigot, having spigot axis, at one end thereof;
the second handle having a circular hole at one end thereof within which the spigot is journalled for pivotal movement of the first and second handles between an open position with the handles misaligned and a closed position with the handles aligned;
a drive wheel, having a notched outer edge, rotatably mounted to the spigot for rotation about a drive axis offset from the spigot axis;
handle means for rotating the drive wheel;
a cutter wheel, having a cutting axis, rotatably mounted to the second handle at a position such that the peripheries of the drive and cutting wheels axially overlap when the handles are in the closed position and are axially offset when the handles are in the open position, the spigot, drive and cutting axes being parallel to and offset from one another;
a projection extending from the handle assembly having a top engaging surface generally coplanar with the cutter wheel edge so to maintain the cutter wheel perpendicular to a surface of a can being opened; and an arcuate guard lip extending upwardly away from the outer surface of the second handle closely spaced apart from a portion of the periphery of the cutter wheel between the cutter wheel and the second grasping portion.
a two piece handle assembly including first and second handles having elongate, flattened first and second grasping portions defining generally flat first and second outer surfaces respectively;
the first handle having a generally cylindrical spigot, having spigot axis, at one end thereof;
the second handle having a circular hole at one end thereof within which the spigot is journalled for pivotal movement of the first and second handles between an open position with the handles misaligned and a closed position with the handles aligned;
a drive wheel, having a notched outer edge, rotatably mounted to the spigot for rotation about a drive axis offset from the spigot axis;
handle means for rotating the drive wheel;
a cutter wheel, having a cutting axis, rotatably mounted to the second handle at a position such that the peripheries of the drive and cutting wheels axially overlap when the handles are in the closed position and are axially offset when the handles are in the open position, the spigot, drive and cutting axes being parallel to and offset from one another;
a projection extending from the handle assembly having a top engaging surface generally coplanar with the cutter wheel edge so to maintain the cutter wheel perpendicular to a surface of a can being opened; and an arcuate guard lip extending upwardly away from the outer surface of the second handle closely spaced apart from a portion of the periphery of the cutter wheel between the cutter wheel and the second grasping portion.
5. The can opener of claim 4, wherein the drive wheel is dish-shaped, the notched outer edge extending radially outwardly and axially away from the spigot.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19828210859U DE8210859U1 (en) | 1982-04-15 | 1982-04-15 | TIN OPENER |
| DEG8210859.5 | 1982-04-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1205623A true CA1205623A (en) | 1986-06-10 |
Family
ID=6739121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000425119A Expired CA1205623A (en) | 1982-04-15 | 1983-03-31 | Can openers |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS5913497U (en) |
| AU (1) | AU552752B2 (en) |
| CA (1) | CA1205623A (en) |
| DE (1) | DE8210859U1 (en) |
| FR (1) | FR2525200A1 (en) |
| GB (1) | GB2118134A (en) |
| IT (1) | IT1161137B (en) |
| NZ (1) | NZ203506A (en) |
| ZA (1) | ZA831866B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4563818A (en) * | 1983-08-01 | 1986-01-14 | Mike & Kremmel Limited | Can openers |
| GB8401495D0 (en) * | 1984-01-20 | 1984-02-22 | Peters A J V | Can-openers |
| GB8502070D0 (en) * | 1985-01-28 | 1985-02-27 | Mike & Kremmel Ltd | Can openers |
| GB8512549D0 (en) * | 1985-05-17 | 1985-06-19 | Mike & Kremmel Ltd | Can openers |
| DE68922227T2 (en) * | 1988-11-07 | 1995-08-24 | Ibl Products Ltd | Tin opener. |
| DE19619989A1 (en) * | 1996-05-17 | 1997-11-20 | Leifheit Ag | Can opener with function unit and handle |
| DE19624125A1 (en) * | 1996-06-17 | 1997-12-18 | Kurt Schneider | Multi-function opener |
| GB2352435A (en) * | 1999-07-29 | 2001-01-31 | Kuo Teng Tang | Cutter wheel type can opener with ratchet mechanism. |
| GB2431389A (en) | 2005-10-12 | 2007-04-25 | Daka Res Inc | Mechanism for a can opener |
| US7596874B2 (en) | 2005-12-12 | 2009-10-06 | Daka Research Inc. | Mechanism for can opener |
| US7574808B2 (en) | 2005-12-12 | 2009-08-18 | Daka Research Inc. (Br. Virg. Isl Corp.) | Mechanism for can opener |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1089931A (en) * | 1963-05-29 | 1967-11-08 | Rudman Darlington & Company Lt | Can openers |
| GB973182A (en) * | 1963-10-14 | 1964-10-21 | Rudman Darlington & Company Lt | Can openers |
| BE790531A (en) * | 1972-06-21 | 1973-02-15 | Paradiso Internationale Manage | PLIERS-SHAPED CAN OPENER |
| JPS532220U (en) * | 1976-06-24 | 1978-01-11 | ||
| NL178157C (en) * | 1978-01-19 | 1986-02-03 | Leifheit International | TANGLY IMPLEMENT. |
| DE2843442A1 (en) * | 1978-10-05 | 1980-04-24 | Leifheit International | PLIERS-LIKE TOOL TO OPEN CAN |
-
1982
- 1982-04-15 DE DE19828210859U patent/DE8210859U1/en not_active Expired
-
1983
- 1983-02-07 GB GB08303320A patent/GB2118134A/en not_active Withdrawn
- 1983-03-08 NZ NZ203506A patent/NZ203506A/en unknown
- 1983-03-09 AU AU12327/83A patent/AU552752B2/en not_active Expired
- 1983-03-17 ZA ZA831866A patent/ZA831866B/en unknown
- 1983-03-31 CA CA000425119A patent/CA1205623A/en not_active Expired
- 1983-04-13 IT IT20558/83A patent/IT1161137B/en active
- 1983-04-15 JP JP1983057441U patent/JPS5913497U/en active Pending
- 1983-04-15 FR FR8306208A patent/FR2525200A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| AU1232783A (en) | 1983-10-20 |
| GB8303320D0 (en) | 1983-03-09 |
| FR2525200B3 (en) | 1984-09-14 |
| ZA831866B (en) | 1983-11-30 |
| AU552752B2 (en) | 1986-06-19 |
| JPS5913497U (en) | 1984-01-27 |
| FR2525200A1 (en) | 1983-10-21 |
| GB2118134A (en) | 1983-10-26 |
| DE8210859U1 (en) | 1982-08-19 |
| IT1161137B (en) | 1987-03-11 |
| NZ203506A (en) | 1986-05-09 |
| IT8320558A0 (en) | 1983-04-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |