US 2830745 A
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April 15, 195s E. BARTOLL AICART DEMOUNTABLE SIPHON HEADS Filed Sept. 20, 1955 AU'TY.
United States Patent 2,830,745 Patented Apr. 15, 1958 DEMOUNTABLE SYPHON HEADS Eduardo Bartoli Aicart, Barcelona, Spain Applicahon September 20,1955, Serial No. 535,424
Claims priority, application France October 12, 1954 4 Claims. (Cl. 222-394) This invention relates to improvements in demountable siphon heads.
Efforts have been made to render siphons intended to contain carbonio beverages more hygienic, and a container has been evolved which is known as a headless siphon and in which the vessel for containing the beverage has a mouthpiece with an aperture with which there is flush the end of the stem of a valve fitted within the said vessel, means being provided to connect to the said vessel a demountable siphon head which is distingished from those conventionally encountered in that it has a free stem associated with the actuating lever and is adapted to make contact with the stem of the said valve in order to lift the same clear of its seating and so permit flow of the beverage contained in the vessel. After the contents of the siphon have been used at home or in a shop, the user detaches the said detachable head and returns the empty vessel to the supplier thereof, retaining the demountable part to which he can give particular attention as regards cleaning and maintenance.
Notwithstanding the undeniable advantages of such an arrangement, it has not been as yet widely adopted commercially due to its great complication, for it comprises a combination of at least four or live independent parts which are merely used for aiixing the mouthpiece part to the vessel. Hence the weight and size of the combination are excessive, and the recipient which is iitted in this Way is proportionately expensive.
The present invention has as its object the provision of a demountable siphon head of greatly simplified construction, so that the improved head is very similar to conventional heads as regards weight and size.
According to the present invention a valve seating member that is mounted in the neck of the vessel or body of the Siphon to close the same comprises a screw threaded internal projection to which the casing of a stop valve is connected and -an external portion having means for the attachment of a detachable nozzle portion, so that a sealed closure is produced between the interior and exterior of the siphon in the connecting region of the said portion and said nozzle portion.
The valve casing is freely screw-threaded on the internal projection provided in the iixed seating member, and has external actuating means which rotate the said casing in any desired axial position, so that the valve loading spring can be compressed to any desired extent to compensate for loss in spring pressure which may occur as a result of wear.
The connection between the nozzle portion and the external portion of the fixed seating member can be of any known type, for example matching male and female screwthreads, bayonet joints, or similar means which provide the same eiiect of connecting the two parts firmly in a disconnectible manner and a Huid-tight manner, so as to prevent liquid losses when the valve is opened.
The quantity of material required to form the said nozzle portion can be reduced to a considerable extent, with a resultant decrease in the cost of the finished siphon head, if the screw-threaded projection on the nozzle portion is formed with a recess extending upwardly a certain distance from the base of the nozzle portion and if there are formed in the said recess, internal connecting means corresponding with external coupling means formed in the lateral surface of the top part of the seating member, through which passes the liquid contained in the Siphon.
Other and further objects of the invention will be apparent from the following detailed discussion of some preferred embodiments of the invention taken together with the accompanying drawing in which the solitary iigure is a sectional view of the siphon head according to the invention and of the upper part of a siphon body tor which the head is attached.
Referring to the drawing the neck 10 of a conventional Siphon body with an end iiange 11 has fixed to it a seating member 12 which completely closes the top of the said neck and which has skirts 13 partly covering the sides of the said neck` The said skirts have an internal screwthread 14 in which there is engaged in known manner a xing nut 15 which can be formed of two connected elements or by a single element sufficiently resilient to push it over the flange 11.
A seal between the body and the member 12 is elected by a packing ring 16 which is compressed between the flange 11 and the bottom of the element-12.
The member 12 has an extension 17 which extends from the base of the element 12 into the inside of the body and has a screw-threaded part 18 into which is screwed a casing 19 for a valve which will be described hereinafter, the casing 19 being integral with a riser 20 that projects down to the bottom of the body.
Within the extension 1'7 of the element 12 is an aperture 21 that places the interior of the body in communication With the exterior. The lower mouth of the aperture 21 is formed as a valve seat 22 to which is applied a valve disc 23 provided with upper and lower axial stems 24. The lower stem 24 serves as a guide for the upper end of a valve spring 25, the lower end of which bears against the bottom of the valve casing 19. The upper stem 24 extends axially within the aperture 21, leaving sufficient annular space for liquid to pass in both directions.
The valve casing 19 can be moved to some degree along the screw-thread 18 so that it is possible to vary the pressure on the spring 25. It will therefore be apparent that when a new spring is tted to a Siphon, it is Suicient to screw a few turns in order to produce' the requisite spring pressure on the valve 23. As the spring loses strength because of wear, the casing 19 merely needs to be given a few more turns to produce the required spring pressure.
This operation is facilitated if means are provided to enable the outside of the casing 19 to be gripped. These means can take the form of knurling which may, if desired, be combined with a fitting enabling the member 19 to be readily fixed in any position in which the screwing operation may have left it, although in many cases the stiffness of the screw-thread connection itself may be sufcient for this purpose.
The aperture 21 is terminated upwardly by a coupling connection formed by a substantially cylindrical part 26 having a screw-thread 27.
That part of the head that is retained by the user comprises a nozzle portion 28 which has a nozzle 29 and a recess 30 having an internal screw-thread 31 for engagement with the screw-thread 2'7.
Opening into the recess 30 is a duct 32 that communicates with the nozzle 29 and extends upwardly beyond the dome 28 and terminates in a chamber 33. Housed therein is a rod 34 which projects through the duct 32 as far as the recess 30. A spring 35 in the chamber 33 tends to maintain the rod 34 inl its uppermost position, and a lever 36 enables the rod 34 to be actuated from the exterior so as to move axially in the direction indicated by the arrow 37, until it abuts the upper stern 24 to open the valve 23. In this way communication is established between the interior and the exterior of the Siphon to facilitate the driving of liquid therefrom by the pressure of the gas dissolved in the liquid.
The top, of the nozzle portion 2S can be arranged like a conventional siphon head or it can be designed specially for the present purpose. Similarly, the parts in contact with the liquid in the body of the siphon can be manufactured from the most suitable non-corroding material or can be arranged in the most suitable way to obviate the formation of toxic carbonates. In addition means may be provided to protect the screw-thread 27 when the dome is removed, such means being made for instance, as a hood of cardboard or other cheap material.
In the embodiment of the invention illustrated, the member 12 has a handle 38 which facilitates holding of the recipient for transportation, when the nozzle portion is removed. In addition, that part of the dome containing the recess 30 is of an external shape adapted to match the general form of the assembly.
In the modification above mentioned, the relative positions of the engaging screw-threads on the elements 12 and 19 are reversed.
With this construction it is possible to use connecting means most suitable to each special case, although preferably an internal screw-thread is used which is formed in the lateral wall of the recess 30 and which cooperates with an external screw-thread formed in the lateral wall of the dome, the reason for this preference being that this arrangement is easy to produce, readily fitted and enables valve loading to be adjusted readily.
To this end the bottom end of the nozzle portion has a bore coaxial with the aperture for the passage of liquid and extending upwardly from the bottom of the nozzle portion and having a diameter considerably greater than the diameter of the passage 32, and terminates in a substantially plane bottom from the central part of which there extends the said aperture for passage of the liquid contained in the Siphon, which liquid-is raised through the nozzle portion.
The cylindrical surface of the said bore is suitably screw-threaded and has an entry appropriate for the diameter selected.
The nozzle portion is provided with a coupling part corresponding to the diameter of the aforementioned recess, and the cylindrical surface of the last-mentioned coupling part is provided with a screw-thread of the same pitch as that used in the member 12.
The relative dimensions of the two screw-threads are so selected that the nozzle portions can be readily adjusted to any desired position on the part 12.
Any suitable means may be provided for improving the t of the valve 23 on its seating. These known means will not be described in detail as they are well-known in the construction of devices for controlling the ilow of liquids, for example by means of a transition, which may be abrupt or which may be eifected by reducing curvature between the plane base of the recess and the liquid duct leading from the said recess.
l. ln combination with a liquid lled container having an open ended neck portion formed thereon, a concave member mounted within the open end extremity of the neck portion of the container, said member having an aperture and a threaded wall portion formed thereon, a vtubular stem abutting said aperture and extending into the liquid in said container, an apertured cap member partially encircling said neck portion vfor effecting closure of said open ended neck portion, said cap member having subjacent and suprajacent threaded and apertured protu berances integrally formed therewith, said subjacent protuberance being in threaded engagement with said threaded wall portion of said concave member thereby forming a chamber therebetween, a detachable head member having a duct extending therethrough and a nozzle in communication with said duct, said head member also having a threaded recess formed therein for threaded engagement with said suprajacent threaded protuberance whereby axial alignment of said duct and said aperture of said suprajacent protuberance is effected, a spring urged rod disposed in said aligned duct and aperture, said rod extending into said chamber, a valve disc disposed within said chamber and aiixed to said rod, said disc being normally in engagement with said apertured cap member for preventing liquid iow from said container to said nozzle, and means operatively connected to said rod for disengaging said valve disc and allowing for liquid flow from said container to said nozzle.
2. A claim according to claim 1 and further including resilient means disposed in said chamber for effecting engagement of said valve disc with said apertured cap member.
3. A claim according to claim 2 and further including adjustable means operatively connected to said cap member for selectively adjusting the resilient pressure of said resilient means.
4. A claim according to claim 1 and further including a handle integrally formed on said cap member.
References Cited in the le of this patent UNITED STATES PATENTS 710,674 Fassmann Oct. 7, 1902 1,956,656 Rush et al. May 1, 1934 FOREIGN PATENTS 445,546 Italy July 23, 1947