Automatic bottle opener with worm stopper

An automatic bottle opener using a mechanical system that automatically stops rotation of the worm screw only in anti-clockwise direction during the extraction stage. A rotation stopper having a one-way bearing for coupling the stopper to the worm screw allows the screw to rotate when displaced axially in one direction, but prevents such rotation when axially displaced in the opposite direction.

FIELD OF THE INVENTION

This invention is applied to particular bottle openers, called automatic bottle openers, of the type already known and it consists of an innovation, an improvement on the said openers that in general are able to open wine bottles.

In particular the invention is useful when the bottles, rather than being closed with the normal cork closures, are closed with another type of closure called synthetic closures.

These closures are made from plastic material, silicone etc. and are usually more viscid and more slippery than cork.

In the type of bottle openers that are to be considered and where the invention has an application, the worm-screw (screw), during the extraction stage of the closure from the bottle neck in an anti-clockwise rotation motion, does not dispose of any stop other than that represented by the friction that the closure offers on the bottle neck.

If this friction is not sufficient, the worm-screw, once it has penetrated the closure in the bottle neck and then been pushed upwards in order to carry out the extraction, can be unthreaded with an anti-clockwise rotary movement and the opening does not take place.

The aim of the invention is to obviate this disadvantage.

BACKGROUND OF THE INVENTION

Automatic bottle openers are know that are applied to a wall or to a table or are also directly placed on the neck of the bottle and are held there tight during the opening operation. Allen. U.S. Pat. No. 4,253,351.

In this type of bottle opener, the worm-screw does not penetrate the closure due to the pushing effect and the rotary movement produced by the operator's hand but rather because it is pushed to penetrate with only a downward axial movement and the rotation is imposed as it is constrained, during this movement, to cross a nut or nut screw, that forces it to rotate.

With this type of bottle opener, it is possible to distinguish two families; in the first, as that described by Allen U.S. Pat. No. 4,253,351, it is the worm-screw itself that crosses the nut to assume the rotary movement; in the second family, the one that we shall be considering, the worm-screw has the sole function of penetrating the closure in order to extract it and the rotary movement is assumed by means of a complementary helicoidal screw integral with the worm, positioned on the same axis.

In the bottle openers where the worm crosses the nut (Allen), to complete the opening operation and release the worm from the closure, two complete movements are necessary from the top downwards and vice-versa.

Instead, in the type of bottle openers that are to be considered and described and where the invention will find an application, the worm makes a single movement, first downwards to penetrate the closure, then upwards, with a single operation to extract said closure and proceeding in the same movement to release it after from the closure.

This second method allows a faster operation that is safer, less complex, with less breakages and improved simplicity of construction, however it presents the disadvantage, as already mentioned and until now unresolved, that if in the extraction stage the closure does not offer sufficient friction on the worm, the worm is unthreaded from the closure that remains perforated in the bottle.

Said friction is necessary with respect to the worm, in the prolongation of its upward axis, it is fixed to a movable support by means of an idle system, a bearing, two flanges etc. that do not offer any type of stop to the rotation of the worm.

The need for the worm-screw to be free to rotate in both directions derives from the fact that first, when it is pushed into the closure it must rotate clockwise to penetrate it and then once the closure has been extracted from the neck of the bottle it must still be free to rotate in the opposite direction, namely anti-clockwise, to be able to release itself from the closure itself.

As long as it concerns cork closures, the extraction operation is generally successful. However, in the last few years, new types of closures have appeared on the market, namely synthetic closures: (Silicone plastic material etc.). These closures offer the advantage of being odourless and not having unpleasant flavours, they generally cost less and their use is increasingly widespread.

In general, these closures are viscid, slippery and impose less friction on the worm-screw than that normally imposed by cork, therefore during the opening operations, the worm penetrates the closure but when the movement is inversed and pushed upwards in order to achieve extraction, the worm, not disposing of any other way of stopping in rotation can be unthreaded with the anti-clockwise rotary movement and the closure remains perforated but in the neck of the bottle and therefore opening does not take place.

SUMMARY OF THE INVENTION

The aim of this invention is to avoid this disadvantage and for this reason, during the single extraction stage, a mechanical system is made to take over automatically that substitutes the lack of friction and keeps the worm blocked in rotation so as to as allow the extraction and then in the process of the same upward movement, still to leave it free in the anti-clockwise rotation, so that the worm can release itself from the closure. This also allows all types of closures to be extracted and without almost greater cost or greater effort.

DETAILED DESCRIPTION OF THE INVENTION

This description that is intended as illustrative and not limitative will be provided with a series of drawings that give an improved understanding of the invention.

In the field of bottle openers that we will be considering, the assembly that has the worm-screw to carry out the opening and release of the closure only executes one movement from the top downwards and only one subsequent inverse movement.

In this process, we can distinguish four different work stages.

Starting from the rest position, the sequences will have the following order.First stage=Approach of the worm to the closureSecond stage=Penetration in the closureThird stage=Extraction of the closure from the neck of the bottleFourth stage=It is the stage in which the worm is released from the closure.

FIG. 1shows a general view of one of these bottle openers, called automatic, in which the worm16assumes the rotary movement since a helicoidal screw15integral to it and placed on the same axis is forced to cross a nut screw17that in the downward and upward movements will force said worm to rotate.

As set out inFIG. 1, the bottle opener is in the resting position and is seen from the side.

The number1indicates the external tubular casing, with2a support base on a table to which will it be locked by means of a clamp2a.

The numbers11and3indicate a lever that in the lower part3extends in a U-shape to encompass the casing.

Said lever is connected to the support base2by means of a pin4.

From the two prolongations of the U-shaped lever3originate two arms5connected to said lever by two pins7a-7band on the opposite side, said arms connect to a small cylindrical block6placed in the casing1by means of two pins7c-7d.

At the base, the casing1comprises a receptacle9where the neck of the bottle28will be placed in abutment and immediately above, comprising an empty sector10, face downwards to allow the closure to exit once extracted from the neck of the bottle.

The casing1also comprises, laterally on both sides, two openings8that will allow the two pins7c-7dand therefore the small cylindrical block6to make the downward and upward movement during the work stages.

FIG. 2is a section seen from the front of the same bottle opener inFIG. 1made to rotate clockwise at 45[deg.]. In this Figure it is to be noted how the two arms5that originate from the lever3are connected with the small cylindrical block6by means of the two pins7c-7d. These two pins are locked on the said small block6with a screw system.

The small cylindrical block6is longitudinally perforated in the centre along its entire its length and on the upper part said perforation extends to make a seat with a bearing12that is locked here and that will have a thrust bearing function.

Said small block6, is free in the casing to scroll from above to below and vice-versa, but cannot rotate.

A pin13passes in said central perforation of the small block6, said pin is free to rotate in the small block and in the upper part it is fixed to the central ring of the bearing12. Said pin13continues upwards with an appendix14with a smaller diameter.

On the pin13, proceeding downwards and under the small block6, a helicoidal screw15is obtained for a section of 7-9 cm. and at the base of said screw the worm-screw16is connected integrally.

The screw of said worm16will have the same pitch as the helicoidal screw15.

The helicoidal screw15crosses a small cylindrical block17, said small block has a nut screw function. Said nut screw17can scroll axially in the casing but cannot rotate and is blocked in the upward movement by a series of stops18a-18bsecured on the casing itself1.

Still on the casing1, towards the bottom and at the height where the point of the worm reaches16in the resting position, a flange19is secured, perforated in the centre in order to allow the passage of the worm16and the helicoidal screw15.

From said flange19, a series of relieves or ribs20that will be better seen in another drawing, extend upwards in contact and fixed on the inside wall of the casing1.

After having described a large part of the details, attention is now drawn to the pin14. It is on this pin that the novelty regarding the invention is found. On said pin14, a small cylindrical block21is inserted held over by a stop22.

Said small block21is perforated in the centre and can rotate on the pin14.

The small block21includes in the lower part a free wheel23with HF type rollers.

Said free wheel is fixed on the small block21and is suitable for working on the pin14; this is directed so that the pin14, the pin13, the helicoidal screw15and therefore eventually also the worm-screw16can freely rotate in the clockwise direction even if the small block21and free wheel23included, do not rotate.

However, in the anti-clockwise rotary motion, the pin14and eventually also the worm16, cannot rotate if the free wheel23and the small block21do not also rotate with them.

Said small block21, includes on its exterior, a series of projections24.

The particulars will be seen in more detail in the following Figures.

FIG. 3is something of a repetition ofFIG. 2but as seen from the side and namely made to rotate with respect to this in the anti-clockwise direction at 45[deg.].

Due to a question of space, the drawing of levers11-3-5is not repeated as the movement and the working of the invention can equally be understood.

Moreover, it is not that these levers are always necessary as the downward and upward movement essential to obtaining opening can also be obtained by the force of a small electric motor that, for example, in the movement downward can make the screw-worm rotate in order to make it penetrate the closure.

FIG. 3highlights the two relieves or ribs20a-20bthat originate from the flange19and extend over a well defined section upward and in the case described here, until penetrating a few millimetres into the base of the small block6in two lateral grooves26on said small block made over its entire length.

FIG. 4shows in plan view the section IV-IV of the small block21. This small block, on its upper part, above the free wheel23, presents three equidistant grooves, hollowed as a trench, and in each one of these grooves a spring25is positioned which, on one side towards the centre of the small block21, is fixed on this and on the other part towards the exterior a small pin24is positioned that projects to the exterior.

The small pin24can be a screw that for a small section is screwed on the spring.25.

FIG. 5, is a front elevation of the small block21, made to rotate 45[deg.] anticlockwise with respect toFIG. 3. The trench groove0on the upper part is highlighted. These grooves will act as a counter shoulder to the small pins24when they strike the ribs20.

FIG. 6, is a plan view of the section B-B. This section is practically the lower part of the small cylindrical block6.

It is noted how this small block6past the central hole, comprises for the entirety of its length, various lateral grooves. Of these, two26a-26bwill serve to allow the passage of the two ribs20a-20bthe other four26will serve to allow the small block6, in the movement downwards, to go past the stops18placed in a fixed way further below on the casing1.

FIG. 7, is a plan view of the section C-C that corresponds to the upper part of the nut screw17.

The four stops18are highlighted that originating in a secured way from the casing1, project for a few millimetre from the interior of the casing in order to block the upward movement of the nut screw17, moreover the two grooves27are highlighted that are obtained laterally on the same nut screw so that the latter can scroll longitudinally along the two ribs20a-20bbut not rotate.

FIG. 8, shows in plan view the section D-D that corresponds to the upper part of the flange19.

The flange19is highlighted from where the two ribs20extend upwards.

The flange19is perforated in the centre and the point of the worm16is highlighted.

This flange19, is secured in a fixed way to the casing1as are also the relieves or ribs20.

After having described the various components that form the bottle opener, the four stages and the movements for understanding working will now be described.

In the first working stage,FIG. 9, from the rest position seen in the previousFIG. 1, by lowering the lever11the movement of the arms5is also obtained and therefore also the movement downwards of the small cylindrical block6and therefore also of the whole assembly that is connected to this small block6by means of the bearing12.

Therefore the movement downwards of the entire apparatus will take place and the point of the worm16will approach the top of the neck of the bottle28and the closure29, placed under the base9of the bottle opener.

Also the nut screw17, not encountering obstacles, will move downwards together with the helicoidal screw15until striking the upper part of the flange19.

This first stage, defined as transfer, is idle and there is no rotation.

Together with the entire assembly, the small block21will also be lowered, placed higher up on the pin14and the small pins24, when the nut screw17is in abutment on the flange19, will be positioned near the highest point of the ribs20.

FIG. 10shows what could occur if one of the small pins24in the process of the movement downwards, should strike the head of one of the ribs20.

In this case, the spring25to which the small pin is connected, will allow said pin to take a position so as not to obstruct the assembly in the process of the movement downwards, which could occur if the small pin24were fixed on the small block21.

The case represented withFIG. 10, is extreme and normally does not occur because even if the small pin24struck the head, at the top of the rib20, said pin, aided by the flexibility of the spring and by the fact that the small block21can rotate, will position itself immediately at one side or the other of the ribs20.

It is to be noted that the small pin24can assume that position only in the movement from above downwards while in the opposite movement, namely upwards, it will remain blocked between the trench groove0and it will behave as if it were fixed on the small block21.

The reason for which the projections24of the small block21are connected with it by means of a flexible system25can now be understood.

Here, the first stage is completed.

Proceeding in the downward movement, the second stage will beginFIG. 11that consists in the penetration of the worm16in the closure29.

In this second stage, since the nut screw17has struck the upper part of the flange19and is blocked here in the movement downwards and is still blocked in the rotary motion by the ribs20, the helicoidal screw15in order to be able to proceed in the movement will be forced to rotate clockwise and thus the worm16that is pushed downwards and rotating will penetrate the closure29.

This rotation is possible because the entire movable assembly that starts from the pin13, is fixed on the central ring of the bearing12that has a thrust bearing function and allows therefore the entire assembly connected with it to rotate freely both in the anti-clockwise and clockwise direction.

FIG. 11shows the position that the various components come to assume when the small block6in the downward movement has achieved the lower dead centre.

Now we will examine what occurred and how the small block21behaved.

When the helicoidal screw15, pushed downwards started to rotate, the pin13and the pin14also followed that movement.

The small block21, positioned on pin14where the free wheel23operates, by means of inertia, will begin a rotary movement together with the pin14and this will continue until one of the small pins24strikes one of the ribs20.

At this point, the small block21, will be obstructed in the rotary motion and will proceed downwards without rotating. This fact will not prevent, however, the rotation of the pin14since, in that clockwise rotation direction, thanks to the free wheel, it is free to rotate even if the small block21and said free wheel23do not rotate.

Proceeding in the movement, it is understood therefore that the small pin24ain contact with the rib20aFIG. 12will follow the movement of the assembly downwards, sliding and touching the wall of the rib20auntil it reaches the lower dead centre.

FIG. 12shows in plan view, the position that the small pins24a-24b-24cwill have taken with respect to the ribs20a-20bduring the penetration stage of the worm in the closure.

The small pin24awill be in contact with the rib20awhile the other two small pins24b,24cwill be free in the space between the casing1, the small block21and at a certain distance from the rib20b.

Here the second stage is completed, the one that we call penetration.

The following third stageFIG. 13will be that in which the extraction of the closure from the neck of the bottle takes place and it is in this stage that the invention finds its application.

In order for the operation to be carried out, it is necessary to invert the force on the small block6to push the assembly upwards. We repeat that in this stage, it is essential that the worm only has upward axial movement and is not rotated.

Pushing upwards, the entire system will move away from the top of the neck of the bottle and if the closure29offers sufficient grip and friction on the worm16the opening will take place.

In this case, the friction offered by the closure being sufficient to keep the worm blocked, there is no anti-clockwise rotation of said closure and eventually, also the pin14and the small block21that includes the free wheel23, will move upwards with only the axial movement and with the small block21the small pin24will also follow the movement, maintaining the position, with respect to the ribs20, assumed during the previous penetration stage.

In this case therefore the invention that is presented here does not intervene and the opening will be carried out according to the traditional system.

Instead the behaviour of the worm will be different and as a result of the axis that supports it, until reaching the pin14where the small block21is positioned with the respective free wheel, if the closure does not offer sufficient grip and friction on the worm.

In this case, as the closure29is tightly held in the neck28and offers a certain resistance to extraction and considering the fact that it does not offer sufficient friction, the worm, free in rotary motion when the upwards movement begins, rather than operate the extraction will prefer to attempt to unthread itself from this closure by starting an anti-clockwise rotary movement.

This fact will also cause the rotation of the pin14and also the small block21that now, due to the effect of the free wheel23is integral with said small block. This start of rotation will last until one of the small pins24strikes against one of the ribs20.

FIG. 14shows in plan view, the position that the small pins24are to assume when in the movement upwards the closure does not offer sufficient friction on the worm. In this case, the small pin24awill be moved away from the rib20auntil the small pin24bstrikes against the rib20b.

The way in which the small pins24are arranged with respect to the ribs20will determine the width of the rotation angle that the small block21can carry out before one of the small pins24goes against one of the ribs20and in conclusion before the invention takes effect.

This rotation angle, with the closure blocked between the neck of the bottle and the worm in this, must be as small as possible in order not to lose the opening effect.

In an attempt to reduce the space between the small pins and the ribs, these have been arranged according to the drawing inFIGS. 12 and 14.

At this point, proceeding in the upward movement, the small pin24b, will follow that axial movement, sliding while supported and rubbing along the wall of the rib20bthus preventing the rotation to the small block21and therefore also to the axis that starts from the pin14to the worm16and namely until the extraction of the closure is not possible.

The lower the friction offered by the closure29on the worm16, the greater will be the rubbing force of the pin24bon the rib20b.

In this case, the small pin24bis practically placed to replace and compensate the low friction offered by the closure.

In this third stage, the nut screw17, already when the upward movement begins, not encountering any obstacles, and being included in the helicoidal screw15that does not rotate, must follow the upward movement until it goes against the stops18.

The fact that the pin24does not allow the rotation of the pin14, together with the fact that the nut screw17moves upwards following the axial movement of the helicoidal screw15, will be the motive for which the entire axis, including the worm that is now found within the closure, moves upwards without rotating.

When the nut screw17is in abutment on the stops18, the worm16will have passed upwards, making a sufficient space to extract the closure and the opening will take place.

The fourth stage will begin in which the worm is released from the closure.

FIG. 15, shows the position that the various components have come to assume when the nut screw17, in its upward movement, has struck the stops18.

The closure29extracted from the neck of the bottle28is seen placed towards the lower part of the flange19and with the worm16inside.

The most important aspect now is that it is fundamentally important in the end to obtain the result that the invention intended to achieve as well as that of observing the position the small pins24have taken in this moment. They have now overcome the highest part of ribs20and are in a position in which, in the process of the upward movement, not encountering obstacles in the casing, are free to rotate together with the small block21, the pin14and eventually therefore also with the worm16.

At this point, continuing in movement, the nut screw17being blocked both in the rotary motion (the ribs20), as well as in axial movement (the stops18), the helicoidal screw15, in order to be able to proceed upwards, is forced into anti-clockwise rotation and in that direction will make the entire axis rotate including the worm16.

The closure29, included in the worm16will be in abutment at the base of the flange19and here will remain blocked without the possibility of rotating, as a result, the upward movement and the contemporary anti-clockwise rotation of the worm16, will make the worm release itself from the closure29for the lower part of the flange19to disappear further.

The closure released in this way can exit the bottle opener across the perforation10of the casing1.

The upward movement can occur until the top dead centre has been reached that coincides with the rest stage (FIG. 1).

At this point the opening has taken place, the closure has been expelled by the bottle opener and the assembly is ready to start a new operation.

The importance and the function of the ribs20that together with the free wheel21with the small pins24, allow the realization of the invention is now understandable.

It is important to establish the point that the ribs20can reach in their upward extension. This point will must always be below that reached by the small pins24at the moment in which the nut screw17is in abutment against the stops18because this is the moment in which the rotary motion begins.