IMPROVED PORTABLE CORKSCREW

Abstract: Portable corkscrew provided with a manually actuatable lever (14), hinged at one extremity to a second lever (16) backed to the body (1) of the corkscrew and at a point (13) intermediary of a part (9) internal to the piston (5), said part (9) being provided with an orifice wherein is housed a ball (8) against which the helical extraction rod (7) bears with a rotational capacity, the piston (5) being provided with a pair of retention elements (10) with spike-shaped free ends, pivotable against springs (12), susceptible of hooking in a higher orifice of a longitudinally displaceable nut (3) through which the rod (7) passes, and which are releasable by the spikes (22) of both lateral manually actuatable levers (19) which are pivotable against the action of higher springs (21), said levers being provided with other lower spikes (23) for retaining the bottle.

Description: OBJECT OF THE INVENTION The present invention refers to an improved portable corkscrew which presents essential characteristics of novelty, as well as important advantages with respect to those similar means known and used in the current state of the art. More specifically, the corkscrew of the invention allows the desired uncorking to be made in a more efficient way in all kind of situations, for which it is envisaged that within its hollow body, an assembly provided with a plunger may be displaced by manually operating an external lever in a known manner, said plunger in turn pushing and dragging the helicoidal extraction rod, the mentioned assembly being provided in accordance to the invention with two lateral holding and engaging elements against the action of the respective associated springs, in relation to a nut that may likewise be displaced along said body and through which the mentioned helical extraction rod passes for its introduction in the cork to be extracted. At both sides of the corkscrew body, two levers are arranged each likewise provided with two superimposed holding means, the upper ones having the double purpose to adapt to the mentioned displaceable nut and also to timely push the holding elements associated to the upper plunger for the release of the nut, whilst the lower ones are used as a holding means for the bottle, the cork of which is to be extracted. Said lateral levers are suitably articulated by means of axles with respect to which they may pivot when manually pressed against the action of the associated springs. The application field of the present invention is that of the manufacturing industry of household items and complements and for the generally specialized industry, such as the restoration field. BACKGROUND OF THE INVENTION Several types of corkscrew are known in the market, which are used to extract the closing corks in bottles mainly containing wine and similar liquids. Within this type of known corkscrews, some of them incorporate a helicoidal rod which after having been introduced into the cork to be extracted, their displacement is caused in the extraction sense by manually acting on external levers. However, it has been proved that in practice when the cork closing the bottle has greater hardness or is introduced at a greater pressure, it is very frequent that in these types of known corkscrews, when pressure is made over the external levers to cause the release of the cork, the mentioned helicoidal extraction rod rotates in the opposite direction to that of its introduction in the cork, due to resistance to the displacement offered by the cork, such that the desired effect of uncorking from the bottle in question is not produced. Subsequent attempts result in the formation of a gap between the helicoidal rod and the cork body, eventually completely eliminating the possible effectiveness of these corkscrews due to the breakage of the cork itself. Consequently, and to eliminate the drawbacks of the type mentioned above, it would be desirable to have a corkscrew whose helicoidal rod could not rotate in the opposite direction to that of its introduction when corks were extracted, which depending on their characteristics or due to the specific conditions of introducing the cork, this offers a high resistance to extraction such that on avoiding said undesired rotation, the uncorking operation is guaranteed and may be executed in a really efficient way. The document ES-U-1 029 130 discloses a portable corkscrew comprising an axially stepped hollow body with a lower hole in which the neck of the bottle carrying the cork to be extracted is introduced, an helicoidal rod to be introduced in said cork, an external lever to be manually operated during the extraction operation of the cork, and a longitudinally movable plunger assembly within the hollow body and which comprises a housing provided with a cover which, at its lower end, supports the helicoidal rod, while its upper face leans against a spherical surface housed in a hole formed in a piece internal to said plunger and provided with a transverse hole to which the manually actuable external lever is articulated by a suitable pin. The document GB-A-2 127 795 relates to an apparatus for extracting a cork from a bottle comprising a corkscrew rotatable mounted on carrier which is mounted on a frame by means of a guide member slidably mounted in a bore of the frame, a non-rotable control nut having a passage to receive said corkscrew, actuator means for longitudinally reciprocating the mentioned carrier, means for preventing the relative rotation between said control nut and said frame, latch means for releasably latching said control nut to said frame, bottle-engaging means for positioning a bottle in alignment with said screw passage, and means for causing frictional binding of a mounting flange and said guide member. DESCRIPTION OF THE INVENTION This invention has developed an improved portable corkscrew combining the aforementioned characteristics and considered as desirable. For this purpose, the corkscrew has an internally hollow, suitable body, according to a stepped axial hole, where several elements comprising the corkscrew device are housed as usual in this type of devices. Externally, the body is closed at its upper part and has a smooth shape except those parts which are slightly protruding from the lateral tightening levers, whose external shape is undulated to permit a better adaptation to the user's hand, the lower end of the body being open to present a hole for the introduction of the bottle neck whose uncorking is desired. The mentioned inner device of the corkscrew is actuated by means of an external lever and is comprised by two differentiated sections, namely, an upper one and a lower one, of which the upper one consists of a plunger over which the mentioned external lever acts, said plunger having a housing where a cover holding the extracting helicoidal rod supported on an element with a spherical surface, for example a ball, to facilitate the rotation of said cover holding the helicoidal rod, and said plunger further carring in accordance to the invention two holding and engaging lateral means which at their respective upper ends are pivotally articulated to the plunger, against the action of related springs, while at their lower ends they adopt the shape of hooks opened to the outside, while the lower section consists of a nut equipped with means of anti-rotation during its displacements inside the corkscrew body, across which passes the mentioned helicoidal rod and against whose lower surface the upper edge of the bottle neck is supported and, if pertinent, the upper surface of the cork to be extracted. This nut has a hole through it upper face shaped in such a way that it allows the engagement in its interior of the lower ends of the means for retention and engagement related to the upper shank. Moreover, the assembly has foreseen the installation of two lateral levers, which the hand presses when the uncorking operation is made and the consequent removal of the extracted cork, these levers being articulated in a pivotable manner to the corkscrew body near their respective upper ends, against the action of recovering springs, placed at said upper ends and each one of these levers having two points or spikes superimposed through their opposite internal edges, in corresponding positions, of which the upper spike of each lever faces the area of the nut foreseen for engagement of the lower ends of the holding elements of the upper plunger when the corkscrew is in the rest position. The possibility of movement of these lateral levers corresponds to a short run limited by the shape of its own housing in the corkscrew body. BRIEF DESCRIPTION OF DRAWINGS Below there is a detailed description of the object of the invention, made on the basis of the attached drawings where, as an example and without a limiting character, a preferred embodiment of the invention has been represented. In such drawings: Figure 1 shows an elevational view of a longitudinal section made in the corkscrew of the present invention; Figure 2 represents an elevational view of the corkscrew of the invention, with some sectioned parts, where the manually actuable external lever may be observed, represented in its two extreme positions, and Figure 3 is an elevational view, likewise in a partial section of the corkscrew of the invention where its inner device is positioned according to the last stage of the process, after extraction of a cork from a bottle. DESCRIPTION OF THE PREFERRED EMBODIMENT To make the detailed description of the preferred embodiment of the present invention, permanent reference shall be made to the drawings commented above. Hence, first of all considering Figure 1, a representation of an elevational view appears in it according to a longitudinal section made in the body (1) of the corkscrew of the present invention, where the different elements comprising the device of said corkscrew are represented. The mentioned body (1) is hollow internally according to a stepped axial hole, open at its lower end to receive the bottle neck holding the cork to be extracted, while at its upper end it appears closed by means of a suitable horizontal wall (2) and, preferably, externally simulates the same shape of a bottle. Within the body (1), there is a nut (3), which may be displaced longitudinally and which is provided with an anti-rotational means (4) preferably consisting, as may be seen in Figure 2, of a suitable screw preventing that said nut (3) may rotate when it is displaced along its longitudinal run, it having been foreseen in said nut, at its upper face, a hole with a profile adapted to permit the engagement of holding means. In the upper part of the body (1), a plunger (5) is housed provided with a hollow where a cover (6) is housed, that at its lower part supports the helicoidal extraction rod (7), said cover (6) being supported by its upper face against a spherical surface, preferably a ball (8) which is housed in a hole of the part (9) internal to the plunger (5), which evidently provides the cover (6) and the related rod (7) the possibility of freely and smoothly rotating. At both sides and in diametrically opposite positions, the plunger (5) incorporates two holding elements (10), which at their upper end are pivotally articulated to the plunger (5) by means of axles (11) and whose lower ends are shaped as a hook ending in outwardly directed spikes, adapted to engage in the inside of the upper hole of the mentioned nut (3). These holding elements (10) have in their pivoting movement with respect to their respective axle (11) a limited run along the same walls of the body (1) and the plunger (5), this movement being made against the action of springs (12). The mentioned part (9) internal to the plunger (5) has a transverse hole (13) where a pin is housed to fix the manually actuable external lever (14) which at its free end is provided with a handle (15). This external lever may be rotated with respect to the pin (13) and has the end opposite to the externally articulated handle by means of the pin (17) to the upper end of a new lever (16) which, in turn, is articulated to the body (1) at is lower end by means of an axle (18). Within the body (1) and at both sides thereof, two lateral levers (19) have been foreseen which are articulated to said body near their upper ends by means of axles (20) and which incorporate at said upper end respective springs (21) supported by the same wall of the body. These levers (19) have their external edge preferable undulated to permit their better adaptation to the user's hand and have a short limited run through the same space where they are housed, being used as means to release the nut (3) with respect to the holding means (10) of the upper plunger (5) and also as holding means of the bottle holding the cork to be extracted. For this purpose, both lateral levers (19) incorporate two projections (22, 23) in their internal edge in the form of spikes directed towards the inside, one projection (22) of which is faced to the housing for the nut (3), in which housing the ends of the holding elements (10) are engaged, whilst the respective lower projections (23) have been adapted to hold the neck of a bottle (25) carring the cork (24) to be extracted. In the mentioned figure 1, the corkscrew appears ready to be used to extract a cork (24) from a bottle (25) whose neck has been introduced through the lower open end of the body (1) of the corkscrew. In these conditions and in pursuance of the pressure made by the user's hand over the corkscrew body, the lateral levers (19) will have pivoted towards the inside against the action of the respective springs (21), until its lower projections or spikes (23) reach the external wall of the bottle neck (25). In this position, the upper projections or spikes (22) are opposite the housing of the nut (3) but sufficiently spaced from said nut. On pressing the handle (15) of the external lever (14) and pivoting the latter with respect to the axle (13) until the position represented with points in Figure 2, the plunger (5) is displaced downwardly and the helicoidal rod (7) is introduced in the cork (24). When the external lever reaches the end of its run, the holding elements (10) related to the plunger (5) and which have descended with it, introduce their lower ends in the form of a hook inside the upper hole made in the mentioned nut (3), pivoting with respect to its axle (11) against the action of the springs (12) and engaged to said nut (3) thanks to the recovering action of said springs. In this way, the assembly related to the plunger (5) is secured to the nut (3). If the handle (15) of the external lever (14) is now lifted, the plunger (5) / nut (3) assembly will be lifted, together with the helicoidal rod (7), dragging the latter in its run upwards to the cork (24) of the bottle (25). The mentioned helicoidal rod (7) cannot rotate in a sense opposite to its introduction, due to the block formed by the plunger (5) and nut (3) assembly, such that the extraction of said cork is guaranteed. Then, the lateral levers (19) are released from the manual pressure made over them, such that the recovery of the related springs (21) make them pivot in an opposite direction, such that the projections or spikes (23) lose contact with the bottle neck (25) and allow said bottle to be extracted from the inside of the body (1). If then the external lever (14) is moved again to the second position to the points shown in Figure 2, the block formed by the assembly of plunger (5) and nut (3), together with the cork (24) extracted from the bottle (25) shall pass to occupy the position shown in Figure 3. In this position, by making a slight manual pressure on the lateral levers (19), the projections (23) will not now limit the run of said levers because inside the body (1) there is no bottle, such that these levers will have a greater run, and the projections or spikes (22) will reach the position of the lower ends of the holding elements (10) of the plunger (5), pressing over said lower ends and releasing the plunger/nut coupling. Under these new conditions, the helicoidal rod (7) will be free to rotate, such that by manually lifting the handle (15) of the external lever (14), the upwards displacement of the plunger (5) assembly will be actuated, the cork (24) being retained by said nut (3) which cannot ascend now due to the fact that it is now prevented by the own projections (22) of the lateral levers (19), whereby the cork (24) is released and it may be finally extracted without any difficulty, the assembly being again in the position illustrated in Figure 1, ready to effect a new extraction. The above disclosure is referred to a preferred embodiment of the present invention which is only limited by the appended claims.

Claims: Improved portable corkscrew, comprising: a hollow body (1), the inside of which is formed as an axially stepped hole, the lower and wider portion of said stepped hole being provided to receive the neck of a bottle (25) carrying a cork (24) to be extracted, the upper and narrower portion of said hole housing a plunger assembly (5) which supports a helicoidal rod (7) to be introduced in said cork by means of a cover (6) arranged at one end of said helicoidal rod, said cover (6) being held in the plunger assembly (5) against relative axial movement and leaning at its upper face against a spherical surface (8) housed in a hole formed in an internal piece (9) of the plunger assembly (5); an external lever (14) provided with an end handle (15) to be manually operated during the extraction operation of said cork, said lever (14) being articulated at its other end to a second rear lever (16) which in turn is pivotably connected with its other end to the body (1), and being pivotally connected to the internal piece (9) of the plunger assembly (5) at an intermediate point by means of a pin (13) inserted through a transverse hole in said internal piece (9); a nut (3) being axially movable arranged in the upper portion of said stepped hole for guiding said helicoidal rod (7) when longitudinally displaced with respect to each other; means for preventing rotation of said nut; and two diametrically opposed auxiliary levers (19) provided with upper (22) and lower (23) spikes-shaped projections, the lower projections (23) serving as retention means of the corkscrew on a bottle neck and the upper projections (22) serving to hold said nut (3) in its lowermost position when an extracted cork is to be removed from said helicoidal rod (7), characterized in that: said plunger assembly is further provided with two lateral holding elements (10) which at their respective upper end are pivotally articulated to said plunger assembly by means of respective axles (11) against the action of associated springs (12), while the lower ends of these holding elements are shaped as hooks with their spikes being outwardly directed; said nut (3) is provided at its upper face with a hole shaped in a corresponding way as to accomplish the engagement therein of the hooks of said lateral holding elements such that said plunger assembly (5) is coupled to said nut (3) during the extraction operation; and the upper projections (22) of said auxiliary levers (19) are arranged to release the lower ends of said holding elements (10) from engagement with said nut (3) when the plunger assembly (5) is in its lowermost position and no bottle neck is present in the wider portion of said stepped hole. Improved portable corkscrew according to claim 1, characterized in that the upper projections (22) of both lateral auxiliary levers (19) are faced from their positions to the hole provided on the upper face of the mentioned nut (3), whilst the lower ones (23) are in a position appropriate to lean against the neck of the bottle (25) which carries the cork (24) to be extracted. Improved portable corkscrew according to claims 1 or 2, characterized in that when the manual operation of said external lever (14) causes the displacement of the plunger (5) assembly, the lower ends of the lateral holding elements (10) associated to said plunger are introduced in the hole formed on the upper face of the mentioned nut (3), in order to secure the mentioned nut and dragging it with its subsequent longitudinal displacement. Improved portable corkscrew according to any one of claims 1-3, characterized in that the upper projections or spikes (22) of the mentioned lateral levers (19) are responsible for releasing the lower ends of the holding elements (10) of the plunger (5) with respect to said nut (3). Improved portable corkscrew according to any one of claims 1-4, characterized in that said upper projections or spikes (22) of the mentioned lateral levers (19) are responsible for retaining the mentioned nut (3) during the operation to release the extracted cork (24) with respect to said helicoidal rod (7).

Inventors: PRESA EGUREN JACINTO, PRESA EGUREN, JACINTO
Applicants: EL SACACORCHOS PERFECTO S L, EL SACACORCHOS PERFECTO, S.L.
Application year: 1996
Main classification: B67B7
IPC codes: B67B7