fig1 depicts an overall speaking valve for laryngectomized and tracheotomized persons according to the invention with the reference sign 10 with a housing 12 , which can be attached to a retainer ( not depicted ), like e . g . a baseplate or a plaster that can be worn on the neck of the patient , or to a trachea cannula . the housing 12 consists of an outer wall 13 as well as a proximal first opening 14 , which is arranged in close proximity to the body of the patient , and a distal second opening 16 , which is arranged facing away from the body with reference to the patient . for the most part , a filter 38 is arranged inside of housing 12 , with a side wall 44 that is made of an open - pored synthetic material , which is made in an elastic manner . housing 12 features a distal end face 24 . on the outer wall 13 , in the area of the distal second opening 16 of housing 12 , an enlarging aid 26 is arranged in form of a circulating flange . the surface 25 of this flange is arranged at flush with the end face 24 of housing 12 . on one inner wall 22 of housing 12 , a fixing aid 18 is arranged that is formed as a circular flange , whereby the distal upper surface of it can come or does come in contact with a proximal surface 40 of filter 38 . furthermore , a total of six additional fixing aids 20 . 1 to 20 . 6 ( see fig3 ) are arranged on the inner wall 22 of housing 12 , which are formed in a cone - shaped way and which reach into the elastic material of filter 38 with their pointed ends . these additional fixing aids 20 are distributed equally along the inner wall 22 of housing 12 , and are aligned within one plane that is perpendicular to an imaginary center axis of the filter and approx . parallel to e . g . the proximal surface 40 of filter 38 . advantageously , at least two further , preferably three , more preferably four , five , six or eight or more of such fixing aids 20 are arranged on the inner wall 22 of housing 12 . these further fixing aids 20 prevent that filter 38 can slip out of an inner compartment 11 of housing 12 . alternatively and in the sense of the present invention , it can also be intended that further fixing aids 20 are left out , and that fixing aid 18 is instead equipped e . g . with hook - like means on its distal surface or that at least partially , but preferably on the entire surface , an adhesive is applied , which provides or produces a tight connection with the elastic material of filter 38 . in this way , a slipping of filter 38 out of the inner compartment 11 is prevented . housing 12 further consists of a bottom part 28 , which can be arranged in star - shape with three arms , as it can be derived from fig3 . the ridges of the bottom part 28 connect to the inner wall 22 of housing 12 . advantageously , a proximal surface of bottom part 28 is arranged approximately at flush with a proximal end face of housing 12 . in an alternative embodiment of the present invention it would be e . g . possible that the bottom part 28 directly functions as fixing aid 18 or 20 . in that case e . g . an embodiment could be presented in the form that filter 38 would be connected with the distal surface of bottom part 28 , at least partially , e . g . by means of applying an adhesive on it or by means of providing means for hooking , which could reach into the elastic material of filter 38 . thus , fixing aids 18 and 20 could be omitted , whereas fixing aid 20 could still be intended , whereby it would now be arranged in such a way that it can reach into the elastic material of filter 38 . the speaking valve 10 according to fig1 further consists of a cover 46 , which features a lower surface 47 , onto which filter 38 is attached with its distal end 42 and with its surface 39 at least partially , but preferably fully , e . g . by means of welding , gluing or by means of arranging for respective means for hooking . when an adhesive is intended , it can also just be intended for only a partial section between the distal end 42 with the surface 39 of filter 38 and the lower surface 47 of cover 46 , as long as a sufficiently firm grip of cover 46 to filter body 38 can be produced in this way . cover 46 basically consists of an even plate , which can be made e . g . of a plastic material , which is advantageously relatively hard , but which at the same time features a certain flexibility , in order that it can eventually produce a secure interruption of the air stream in closed position of speaking valve 10 . on the distal surface of cover 46 , an operating device 60 is arranged approximately in the center , which makes it easier for the patient to find the right pressure point by palpation in order to reach the ideal closing effect for the interruption of the air stream in order to produce a speaking . cover 46 features an edge 48 with a lower surface 50 . the lower surface 50 can be addressed as ring - shaped area , edge 48 as arranged in a ring - shape . filter 38 protrudes beyond end face 24 of housing 12 by approximately 15 % of its overall height . if now a patient applies pressure onto cover 46 in the direction of the proximal first opening 14 of housing 12 , then filter 38 is compressed , and the lower surface 50 of edge 48 of cover 46 comes into contact with end face 24 as well as the distal surface 25 of enlarging aid 26 . hereby an airstream from the outside of the housing , as it is symbolized e . g . by arrow 64 . 1 , into the inner compartment 11 , as well as an airstream in the opposite direction , as it is symbolized by arrow 64 . 2 , is prevented . in the sense of the present invention , it can e . g . also be possible that there is a central opening in the area of the operating device 60 , so that the patient can also breathe air , and air can reach into the inner compartment 11 of housing 12 through this opening , or in opposite direction , that air can also leave the speaking valve through it . by means of the interruption of the airstream due to the contacting of the cover with the housing , speaking is made possible to the patient . fig1 depicts the speaking valve 10 in the initial position , which means in a position , in which the patient is able to breathe , in that air can stream in and also out through a sideways opening 36 and possibly also through a central opening in the area of the operating device 60 that is intended in the cover , into or out of the inner compartment 11 of housing 12 . opening 36 is arranged in a circular - shape all around , without any interruptions . in order to improve the contacting and thus also the interrupting of the airstream , sealing gaskets 32 or 62 are arranged on the cover piece 46 and at housing 12 . sealing gasket 32 is hereby arranged on the end face 24 of housing 12 as well as on the distal surface 25 of enlarging aid 26 . on the respective opposite side there is a sealing gasket 62 on the lower surface 50 of edge 48 of cover 46 . sealing gasket 32 as well as sealing gasket 62 are made of silicone or of another sufficiently soft , that means elastic synthetic material , which is arranged in a medically harmless way . fig2 depicts the closed position of speaking valve 10 according to fig1 in detail , and hereby in particular the contacting of sealing gasket 32 and 62 . fig3 depicts a bottom view of the first embodiment of speaking valve 10 according to fig1 , from which in particular the formation of the bottom part 28 as a three - armed star and its attaching to the inner wall 22 of housing 12 can be seen . the radially symmetrical embodiment of speaking valve 10 can also clearly be derived from fig3 , as well as the six fixing aids 20 . 1 , 20 . 2 , 20 . 3 , 20 . 4 , 20 . 5 and 20 . 6 . fig4 to fig6 now depict a second , third and fourth embodiment of speaking valve 10 in a detailed depiction concerning the distal end section of housing 12 . hereby , same parts are described with the same reference signs as in the first embodiment according to fig1 to fig3 . fig4 depicts a housing 12 with an enlarging aid 26 that is arranged on an outer wall 13 of the housing , which features a first elevation 30 . when viewed in cross section , it has a rectangular , almost square shape . on the distal surface of the first elevation 30 and on the end face 24 of housing 12 that was created hereby , a sealing gasket 32 is arranged , whereby the sealing is also arranged on the area between the first elevation 30 and the distal end face 24 of housing 12 within the area of ledge 33 that is arranged there . fig5 depicts a third embodiment of the speaking valve 10 according to the invention with a housing 12 and an enlarging aid 26 that is arranged on an outer wall 13 of the housing , which features a first elevation 30 , whereas in contrast to the second embodiment according to fig4 , this one features a sloped ledge 33 , which is inclined towards a not really depicted inner compartment 11 of housing 12 . the sloped ledge 33 hereby runs from the distal surface of the first elevation 30 downwards to the distal end face 24 of housing 12 . a sealing gasket 32 is arranged over the entire surface of the first elevation 30 and of the distal end face 24 of housing 12 , which is facing towards the ( not depicted ) cover 46 . fig6 depicts a fourth embodiment of the speaking valve 10 according to the invention with a housing 12 and an enlarging aid 26 that is arranged on an outer wall 13 of the housing with a first elevation 30 . when viewed in cross section , the first elevation 30 features a surface with an almost sigmoidal course of a curved component 35 , which is facing towards a not depicted cover 46 , which goes over into a distal end face 24 of housing 12 . fig7 depicts an embodiment of a cover 46 that is associated to the fourth embodiment of the present invention , with a second elevation 54 , which is arranged on a lower surface 50 of edge 48 of cover 46 , and which features a curved component 37 when viewed in cross section , with an almost sigmoidal course at least along a partial section of this second elevation 54 , whereby there is a more or less even course of this surface close to a filter 38 or of its filter side wall 44 , which more or less corresponds to the distal end face 24 of housing 12 . fig6 and fig7 illustrate that there is an adaption between the outer contour of the lower surface 50 of cover 46 and that of an outer contour of end face 24 of housing 12 as well as between an outer contour of the first elevation 36 and that of the second elevation 54 . thus , when pressure is applied from the initial position onto cover 46 by the patient , a centering of cover 46 with the filter 38 in housing 12 is accomplished and thus a secure interruption of the airstream in order to accomplish a speaking . fig8 depicts in a fifth embodiment a detailed formation of the distal end section of housing 12 with a distal end face 24 and an enlarging aid 26 that is arranged on an outer wall 13 of the housing 12 , which carries a first elevation 30 . this first elevation features recesses 34 that are more or less arranged in semicircular shape . fig9 hereby depicts a complementary arrangement of a cover 46 for this fifth embodiment with a lower surface 50 of edge 48 with pin - like centering aids 56 that are arranged onto it , which can be accommodated by recesses 34 in the distal end section of housing 12 . fig1 illustrates in a top view onto housing 12 according to fig8 , that a total of eight semicircular recesses 34 are intended in the area of the enlarging aid 26 with the first elevation 30 , in which a corresponding amount of pin - like centering aids 56 , which are arranged onto cover part 46 , can be accommodated . the recess 34 can hereby be addressed as the first centering aid in the sense of the present invention , the pin - like centering aid 56 as the second centering aid , whereby the first and the second centering aid work together in order to achieve the centering . the arrangement of first and second centering aids 34 or 56 is also combinable with the formations according to fig4 to fig6 of the second to fourth embodiments , and can of course also be combined with the first embodiment . in conclusion it should be noted that the formations that are depicted in the figures of the first to the fifth embodiment of the speaking valve according to the invention , are not to be interpreted as limiting or restricting . rather , the characteristics that are described there can be combined with each other and with the characteristics of the present invention that were described before the figures for further development . furthermore , it should be noted that the reference signs in the figure descriptions do not limit the scope of protection of the present invention , but that they should merely refer to the embodiments that are depicted in the figures . it may be noted in particular , that the first embodiment that is depicted and described in fig1 , can also be arranged in a different way , and that in particular the bottom part 28 can also function as fixing aid 18 or 20 , so that eventually also a reduction of the construction height of the speaking valve according to the invention can be accomplished .
the invention relates to a speaking valve for laryngectomized and tracheotomized persons that is easy and economical to produce . according to the invention , the speaking valve comprises a proximal first opening and a distal second opening , a filter , which is at least partially surrounded by the housing , which filter is made of an elastic material , and has a proximal first end and a distal second end , wherein the filter partially protrudes beyond an end face of the housing at the distal second opening , and wherein a cover is connected by means of at least one partial region of the bottom surface thereof to a top side of the filter at the distal second end of the filter . a diameter d 1 of the cover is greater than a diameter d 2 of the filter , such that an edge projecting beyond a lateral filter wall of the filter is formed , wherein by application of pressure to the cover from an initial position , a bottom surface of the edge at least partially interacts with the end face of the housing in order to produce a closed position of the speaking valve , and wherein the cover together with the filter returns to the initial position when unloaded .