Abstract:
Radial actuation of a handle ( 15 ) axially retracts the dispensers shaft ( 6 ) inclusive an exit head ( 9 ) relative to a base body ( 5 ) and a reservoir ( 7 ). The shaft ( 6 ) is prevented from rotating. The medium thus flows from a pressure chamber ( 26 ) via an outlet valve ( 32 ) through the entire shaft ( 6 ) to a medium exit ( 20 ) while being swirled. For facilitated handling the base body ( 5 ) and the reservoir ( 7 ) form a rod-shaped grip with the handle ( 15 ) on one side and a finger scallop ( 72 ) on the other.

Description:
TECHNICAL FIELD AND BACKGROUND OF THE INVENTION  
         [0001]    The invention relates to a dispenser for media. They can be liquid, powdery, gaseous and/or pasty. The dispenser may be carried and simultaneously operated single-handed. The discharger or deliverer can be a pump, the valve of a pressure vessel, such as an aerosol vessel or the like. The medium may be atomized at the medium exit or a non-atomized jet or droplets or an extruded line.  
           [0002]    A small dispenser having an axial actuation stroke of less than 5 mm or 3 mm and a maximum outer diameter of less than 25 mm, 20 mm or 18 mm comprises a handle which could be manually actuated parallel to the axis of the dispenser or transverse thereto. This motion of the handle is to be translated into an axial motion of an actuating shaft. The individual components of such a dispenser are very small. They are sensitive to mechanical loads as well as being difficult to support. An external surface which is irregular over the length of the dispenser and multiply stepped at the outer circumference or in the manual gripping zone may make handling and stowing away difficult.  
         OBJECTS OF THE INVENTION  
         [0003]    An object is to provide a dispenser which obviates the disadvantages of prior art constructions or of the kind as described. Particularly, the intention is for the dispenser to ensure despite miniature dimensions high mechanical stability, safe and precise functioning as well as being easy to use and uncomplicated to handle.  
         SUMMARY OF THE INVENTION  
         [0004]    According to the invention means are provided to reliably guide the acuating shaft radially and/or prevented from rotation over a length which is more than half its diameter. This guidance may be provided in the vicinity of the coupling connection between the handle and the shaft and/or directly adjacent upstream thereof. Guidance is done directly on the inner circumference of the outermost shell wall of the base body. The guide part of the shaft may form an axial stop for the actuated end position or for the position remote from the initial position. This stop abuts against an end face of the housing of the deliverer into which the shaft permanently protrudes.  
           [0005]    Over its major length or over more than two-thirds or three-quarters of its length, the dispenser in use has constant outer width. This is reduced only in the vicinity of the exit head. Beyond this width bound only the handle protrudes radially outwards. The dispensers overall length is at least five, seven or eight times more than the outer width. Within the length of constant outer width a medium reservoir is longer than the base body by at least half the bodies length. This constantly wide outer circumference extends over a length of at least 8 cm or 10 cm. Thus this outer circumference forms a favorable gripping face while actuating because all fingers of the user hand can surround and support on it. A removable cover for the exit head directly adjoins the base body and the handle by the cited outer width.  
           [0006]    The cited, constantly wide circumferential face of the pin-shaped dispenser is interrupted only in sections which extend over part of the length and of the circumference of the base body. These sections in which the circumferential face is transversely offset relative to the constantly wide portions may be a window opening for engaging the handle, an inclined surface for receiving the handle in the actuated end position or a recessed finger scallop remote from the handle.  
           [0007]    The cover cap for the exit head engages the inner circumference of the base body. The cap comprises an inclined face which is tensioned relative to a conical end face of the base body or of the handle. Thus actuation is locked in the initial position. In this position the handle protrudes radially beyond the outer circumference of the base body by maximally a third or half of the constant outer width. In every position the handle is spaced from and located between both ends of the base body so that it cannot cover the reservoir.  
           [0008]    The exit head comprises a one-part, oblong head cap. The end wall thereof is traversed by a nozzle duct or the medium exit. A separate nozzle core extends from the inside of this end wall exclusively upstream. This core forms an assembly unit with the actuator. The core is located without contact within the head cap over its major length. An outlet duct traverses the actuator shaft and the core body. In cross-section this duct is non-circular but flat. The cross-sectional length of this duct is at least half or twice as large as its cross-sectional width or at least as large or larger than the outer width of the nozzle core. Thus the duct traverses an outer end wall in the region of the ducts narrow sides. The core body emanates from this wall only upstream. The duct forms passage openings at the outer circumference of the core body and adjoining this end face. Through these openings the medium can exit from the interior of the duct to the outer circumference of the core body.  
           [0009]    The passage openings extend up to the inner side of an end wall by the outer side of which the core body is located directly adjacent to the end wall of the head cap or to the inner end of the nozzle duct. An axial duct leads from each opening of the core body to the outside of the end wall of the core body from where a transverse duct is directed to the nozzle duct. Each of the cited duct sections is circumferentially sealingly closed. All duct sections connecting downstream to the duct passages traversing the end wall and these passages are bounded in two parts, namely by the actuator shaft and the head cap. Upstream thereof and up to the pressure space of the discharger the duct is located totally within the actuator shaft, which circumferentially entirely bounds the duct in one part. Thus minute dose quantities can be discharged very accurately and thereby atomized.  
           [0010]    Reference is made to DE-OS 196 10 456 as regards further features and effects to be incorporated in the present invention. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0011]    Example embodiments of the invention are explained in more detail in the following and illustrated in the drawings in which:  
         [0012]    [0012]FIG. 1 is an inventive dispenser in side view and partial cross-section;  
         [0013]    [0013]FIG. 2 is an exploded side view of the dispenser from the right in FIG. 1, and  
         [0014]    [0014]FIG. 3 is an enlarged axial view of the nozzle core body. 
     
    
     DETAILED DESCRIPTION  
       [0015]    The dispenser  1  comprises two units  2 ,  3 . They are moved axially relative to each other for discharge actuation and for effecting the discharging pressure of the medium. Thereby a third unit  4  is moved transverse to units  2 ,  3  along a circular arc. Unit  2  comprises a sleeve-shaped base body  5 . The base body of unit  3  is an actuating shaft  6 . A reservoir  7  and the housing of a discharger, such as a thrust piston pump  8 , belongs to the dimensionally rigid unit  2 . An exit head  9  located at the end of body  5  facing away from reservoir  7  belongs to unit  3 . When made as a single-use discharger without return stroke the reservoir may be formed by the pump housing and totally emptied by a stroke oriented in but a sole direction. All parts of units  2 ,  3  are located in a common axis  10 , relative to which unit  4  is arranged partly eccentric. The medium flows through the dispenser  1  substantially parallel to axis  10  in direction  12  to the free end of head  9  or downstream. Head  9  is retracted in the opposite direction  13  when actuated relative to units  2 ,  5 . Unit  4  forms a handle  15  shown in the initial position in FIGS. 1 and 2. For actuation the handle  15  is pivoted about an axis  11  and caused to approach body  5  at an acute angle to the rear in direction  14 . Axis  11  is located within body  5  at right angles transverse to axis  10  on the side thereof which faces away from handle  15 .  
         [0016]    Unit  4  comprises a driver  16  freely protruding from the inside of dish-shaped handle  15 , inserted radially in body  5  and made in one part with units  4 ,  15 . A counter member  17  for driver  16  is provided on actuator  6 . Thus the pivot motion of driver  16  results in motion of unit  3  in direction  13 . One-part body  5  comprises a jacket or wall  18 . Within shell  18  body  5  includes an end wall  19  which is spaced from and located between the ends of shell  18 . Wall  19  is located nearer to the downstream end than to the upstream end of body  5 . Thus body  5  forms a cap in which a part of reservoir  7 , pump  8  and members  16 ,  17  are located. Driver  16  is located directly adjacent to the inner side of wall  19 . The linear member  17  connects upstream to driver  16 . Pump  8  and reservoir  7  connect downstream to members  16 ,  17 . Pump  8  extends by its major casing length into reservoir  7 .  
         [0017]    The free end face of head  9  is traversed by a medium exit  20 , namely a nozzle orifice having a diameter of less than half a millimeter. Exit  20  is formed by the outer end of a straight nozzle duct which is widened as a funnel in direction  13 . This duct traverses end wall  22  which connects to a shell wall  21  in one part and only in direction  13 . The medium leaves exit  20  as an atomized conical jet. Head  9  is tapered in direction  12 . Head  9  is suitable for being introduced into a body opening like a humans nostril. Then the slimmer end section which has a diameter of less than 7 mm, protrudes into the nostril and the connecting wider section closes off the nostril. During actuation exit  20  is retracted in the nostril and relative to unit  2 . Thus the nostril closure by the wider section of shell  21  is opened and the medium distributed over a major length of the nasal duct.  
         [0018]    Pump  8  comprises a two-part casing  23 . A riser tube  24  extends from the upstream end of casing  23  to the bottom of reservoir  7 . An inlet valve  25  connects downstream to riser tube  24 . Ball valve  25  closes and opens tube  24  with respect to a pressure space  26  pressure-dependently. Opposite to valve  25  the space  26  is bounded by a piston unit  27  or the piston  28  thereof. Unit  27  comprises in addition to the sleeve-shaped plunger  28  a piston core  29  which entirely traverses plunger  28 . Casing  23  consists of a longer casing jacket  30  and a shorter cap-shaped closure  31  which is fixedly connected to the downstream end of jacket  30  by a snap connector. Piston  28  slides on the inner circumference of shell  30 . On this circumference the movable valve element of valve  25  comes into contact. At its downstream end piston  28  comprises an elastically compressible piston neck. Piston  28  and core  29  commonly provide a self-closing outlet valve  32 .  
         [0019]    Valve  32  opens at a predetermined pressure in chamber  26  or by piston  28  abutting on an inner shoulder of shell  30  at the end of the actuating stroke. A sleeve part of the cover  31 , which protrudes into shell  30  in direction  13 , forms with piston  28  a valve  33  for venting reservoir  7 . The inner circumference of piston  28  forms the movable closing face of valve  32 . The outer circumference of piston  28  forms the movable closing face of valve  33 . In its initial position valve  33  is sealingly closed while opening with the start of the piston stroke. Shell  30  is traversed by three apertures  34  which are equally distributed about the circumference and connect to cover  31 . Space  26  is permanently sealed off relative to apertures  34 . Apertures  34  are located in the same axial section as valves  32 ,  33 . Ram  6  traverses cover  31  so that air is able to flow along its outer circumference from outside of the dispenser  1  up to valve  33 . With valve  33  opened air then flows through ports  34  as well as along the outside of shell  30  into reservoir  7 . When an overpressure exists in reservoir  7  this air is also able to flow out in the counter direction.  
         [0020]    On the one-part cover  31  casing  23  comprises an outwardly protruding annular flange  35 . Pump  8  is supported and tensioned against an end face of a neck  37  of flask  7  with an interposed member  36 . Neck  37  adjoins the flask belly  38  via an annular shoulder against which the upstream end of shell  18  may be tensioned. At this end body  5  comprises a female thread which mates with the male thread of neck  37  and tensions pump  8 . Annular member  36  comprises between flange  35  and neck  37  an annular flange and a shell which protrudes exclusively in direction  13  from this annular flange. The shell radially spacedly surrounds apertures  34  or shell  30 . For centering shell  30  the member  36  comprises ribs which protrude beyond its inner circumference.  
         [0021]    On its inner circumference shell  18  includes at least six, eight or ten axial longitudinal ribs  39  which are circumferentially uniformly distributed. Ribs  39  correspondingly center cover  31  downstream of flange  35 . The upstream ends of ribs  39  are axially tensioned against flange  35 . Over its full length the outer diameter of belly  38  is the same as the outer diameter of shell  18 . Belly  38  may consist of a transparent material or comprise a window to permanently enable visual control of the medium level from outside. As evident from FIG. 2 the largest width of unit  4  and of handle  15  is maximally as large as the diameter of shell  18 . The widest portion of handle  15  extends over an angle of more than 100° and less than 180°about axis  10 , particularly an angle of 125°. Reservoir  7  may be removed without destruction from body  5  and replenished with medium.  
         [0022]    Shaft  6  is assembled of a plurality of five shaft parts which chain longitudinally and are interconnected by axial plug connections. These shaft parts may also be commonly made in one part. For example, a one-part shaft  41  to  44  and/or  40 ,  42 ,  43  is expedient. Core  29  forms the upstream end of shaft  6 . To the stem of core  29 , which protrudes downstream over piston  28 , a shaft part  41  connects, which has the same length as core  29  and in the interior of which the core shaft is plugged in. The reduced downstream stem section of portion  41  is plugged into the interior of longer shaft part  40 . The downstream end of part  40  overlaps the outside of the shortest shaft part  42 . Part  42  engages the interior of the next, longest shaft part  43 . Thus the mutually facing ends of both shaft parts  40 ,  43  are directly juxtaposed. When in one part the outer width of shaft  6  is continuously reduced in direction  12  and not increased. The downstream end of part  43  forms a core body  44  for nozzle cap  21 ,  22 . The end face of body  44  contacts the inside of end wall  22 , possibly axially tensioned.  
         [0023]    The length of core  44  is at the most as large as its diameter which may conically taper by a few degrees in direction  12  or  13 . In direction  13  the core  44  connects to a widened shaft section  45 . In direction  13  a further widened section  46  connects to section  45 . An again widened socket (not shown in FIG. 3) connects to section  46  and receives part  42 . The transition between sections  44 ,  45  is formed by flat annular shoulder  47  to which section  45  connects via a cone  48  constricted at an acute angle in direction  12 . All cited sections of part  43  are commonly in one part. Part  43  is traversed by a duct  49  which in FIG. 3 is rectangular and flat. The narrow sides of duct  49  are concavely curved about axis  10 . The cross-sectional length of duct  49  is at least twice as large as its cross-sectional width or half thereof. Furthermore, the cross-sectional length is at least as large as the outer diameter of core  44 . Thus duct  49  emerges at the end face  47  only in the vicinity of its narrow sides. In face  47  the duct  49  forms graduated annular ports  50 . Ports  50  are curved about axis  10  and oppose each other on both sides of axis  10 . Duct  49  also emerges over the same or smaller width at the outer circumference of core  44  with ports  51  which face away from each other. Thus in each case two ports  50 ,  51  are interconnected at an angle. Duct  49  and ports  51  extend up to an inside of an end wall  52  of core  44 . This inside is remote from end face  47 . The thickness of wall  52  is smaller than the outer diameter of core  44  or half thereof. The outer diameter of core  44  is smaller than 4 mm or 3 mm.  
         [0024]    As viewed in FIG. 1 the port  51  may be constricted in width at an acute angle in direction  13 . If in production of part  43  the duct  49  is injection molded with a mold core or mandrel the shape of port  51  is achieved alone from the conicity of core  44 . The mold core simultaneously forms ports  50 ,  51  and the inside of wall  52 . Wall  52  is connected to section  45 ,  48  only via two mutually opposing legs separated by ports  51 . These legs bulge radially outwards when axially tensioned and can thereby be sealingly pressed against the inner circumference of shell  21 . Each of sections  45 ,  48 ,  56  is circumferentially and over its entire length in sealing and full contact with the inner circumference of shell  21 . Section  46  is at least twice as long as each of sections  45 ,  48 ,  56 . Section  46  is entirely without contact inside of shell  21 . Parts  29 ,  41 ,  40 ,  42 ,  43  are connected to each other resistant to tensile stress, for example, by bonding, welding or snap connectors. Except for core  29  all of these shaft parts are internally traversed by continuations of duct  49  or by central longitudinal bores.  
         [0025]    To the downstream end of port  51  a longitudinal groove  53  of same width connects. This shallow depression  53  in the outer circumference of core  44  is sealingly covered at its open side by the inner circumference of shell  21 . Thus groove  53  and port  40  commonly form a shallow duct having the same cross-sections as port  50 . This shallow duct is traversed by port  51  at its associated flat side and at its upstream end. Port  51  extends up to wall  52 . The named flat side is traversed by a transverse duct  54  downstream of port  51 . Duct  54  is formed by a groove in the outside of wall  52 . The open groove side of this groove is sealingly covered by the inside of wall  22 . Duct  54  has significantly smaller flow cross-sections than ports  50 ,  51  and duct  53 . Port  54  issues into a widened chamber  55  towards axis  10 . Chamber  55  is formed by a circular depression in the outside of wall  52 . Chamber  55  has the same diameter as the inner end of the nozzle duct. This end is widened and directly connects to chamber  55  which is coaxial with the nozzle duct. Ducts  54  issue tangentially into chamber  55  in opposing directions and laterally offset from each other. Thus medium flow is caused to swirl and to rotatingly pass the nozzle duct.  
         [0026]    At the upstream end the shell  21  comprises one or more cams or annular beads  57  which protrude beyond its outer circumference. Cam  57  centers and sealingly guides head  9  at an inner circumference of unit  2 . Body  5  comprises two nested shell walls  58 ,  59  at its downstream end. Shells  58 ,  59  are mutually radially spaced and protrude from wall  19  in direction  12 . Inner jacket  58  protrudes further than outer jacket  59 . The outer circumference of shell  59  forms a smooth continuation of the constant outer circumference of shell  18 . A sleeve-shaped member  60  is inserted in shell  58 . Member  60  may also be in one part with body  5 . Part  60  axially abuts shell  58  in direction  13 . Part  60  protrudes beyond shell  58  in direction  12  by a sleeve section. Member  57  sealingly slides on the inner circumference of this sleeve section. The shaft parts  40 ,  43  may be supported against radial motions within shell  58  or on the inner circumference of part  60 . Part  60  is secured to shell  58  by a press fit. Shell  21  is permanently spaced from unit  4  or handle  15  in direction  12 .  
         [0027]    Axis  11  is defined by a bearing  61  or a knife-edge suspension. The knife edge is formed by an acutely angled corner zone of driver  16 . The rectangularly flanked bearing reception is formed by the inside of wall  19  and the length edge of a rib connecting to wall  19 . The spacing between axes  10 ,  11  is slightly less than the radius of the curved inner circumference  62  of shell  18  from which ribs  39  emanate. The rib height of the bearing cup is smaller than the height of ribs  39 . The ribs of the bearing reception are significantly shorter than ribs  39  and directly connect to both sides of one of ribs  39 . Ribs  39  permanently engage inside a groove  65  of driver  16 . For this purpose driver  16  comprises a projection  64  at its end which is remote from handle  15 . The width of projection  64  is reduced relative to driver  16  (FIG. 2). Projection  64  includes groove  65 . The widened section of driver  16  comprises a passage for shaft  6  or part  40 . This passage is located between projection  64  and handle  15 . Parts  6 ,  4  are inserted into body  5  and unit  4  in direction  12 , like units  7 ,  8  are.  
         [0028]    Sleeve-shaped part  40  is in one part with counter members  17 . Members  17  protrude beyond the outer circumference of sleeve  40  at two remote sides and form a crossbeam. In view of FIG. 1 members  17  do not protrude beyond the outer circumference of sleeve  40 . Members  17  are located nearer to the upstream end than to the downstream end of sleeve  40 . At its ends the crossbeam comprises cams  66  which protrude in direction  12  and which are narrower than the crossbeam. Each cam  66  is guided and prevented from rotation between two juxtaposed ribs  39 . Each cam  66  spacedly and laterally overlaps driver  16 .  
         [0029]    Member  17  forms a straight edge or slide face between cam  66  and the opposite outer circumference of sleeve  40 . The web-shaped drive cam  74  of driver  16  permanently supports against this edge with pressure and between axis  10  and handle  15  within shell  18 . Motion of handle  15  in direction  14  thus results immediately in motion of unit  3  in direction  13 . Components  6 ,  9 ,  27  belong to unit  3 . Unit  4  is in one part. In the initial position part  40  extends from cover  31  through driver  16  up into shell  58 . Thus part  40  protrudes beyond unit  4  in direction  12 . Counter faces  17  are formed by two edges of the crossbeam. These edges are rounded and mutually aligned. Faces  17  are located radially within cam  66  and on both sides of sleeve  40 .  
         [0030]    Handle  15  is curved about axis  10  to form a tray. The width of handle  15  increases in direction  13  over its major length and then decreases again. Thus side wings are formed between the handles ends. The wings are less thick than 1 mm. While laying the wings against the outer circumference  63  of shell  18  these wings are resiliently spreaded. Thus the width of handle  15  increases. The wing thickness increases towards the middle of the width of handle  15 . Thus the handle  15  is dimensionally stiff in its median zone including the driver  16  emanating therefrom. This median zone includes a wall thickening  67  which adjoins the driver  16  upstream and reinforces both members  15 ,  16 . Also a projection  68  of unit  4  may be tray-shaped and resiliently widenable. Jut  68  protrudes beyond driver  16  in direction  12 . Jut  68  permanently tightly envelopes the outer circumference  63  over an arc angle which is smaller than that of the wings or maximally 100°.  
         [0031]    Jut  68  includes on its inside and downstream end a protruding cam  69 . Cam  69  is in contact with the end face of shell  59  in the initial position. Shell  59  and cam  69  have the same radial spacing from shell  58 . In this zone a depression  75  is provided in the end face  59  (FIG. 2). The inclined end section of jut  68  including cam  69  engages inside depression  75 . In the initial position unit  4  is positionally locked by cam  69  providing a snap connector. This non-positive or frictional locking can only be overcome with a snap effect or audible click by applying a corresponding high actuating force. Shell  18  is traversed by a rectangular window  70  extending only up to the inside of wall  19 . Driver  16  is inserted into window  70  radially and transverse to axis  10 . From the upstream transverse bound of window  70  and at the outer circumference  63  extends a planar surface  71  which is inclined away from axis  10  in direction  13 . The complementary inclined surface of reinforcement  67  may be brought fully into contact with face  71  when handle  15  is in the actuated end position.  
         [0032]    Handle  15  covers aperture  70  permanently completely. For this window  70  and driver  16  have the same width but are significantly narrower than handle  15 . Window  70  extends about axis  10  over an arc angle of less than 90°. Circumference  63  is provided with a depression  72  on its side facing away from handle  15 . Depression  72  extends over an arc angle of more than 100° and less than 120°. The depression depth increases more inclined at the depressions downstream end than at the upstream end. The users thumb or index finger finds support in this scallop when handle  15  is actuated, according as whether handle  15  is actuated by the thumb or index finger. The inner circumference  62  is also constant in width in the vicinity of scallop  72 . Thus in this zone shell  18  is significantly less thick than 1 mm.  
         [0033]    As seen in FIGS. 1 and 2 the driver  16  has the shape of a flat plate. In FIG. 1 this plates thickness increases only between axis  10  and handle  15 . Actuator  6 ,  40  traverses passage  73  of driver  16 . Passage  73  is an oblong hole which is circumferentially entirely bounded. The minor width of hole  73  is located in the cross-sectional plane of FIG. 2. This width is closely adapted to the corresponding diameter of section  40  with clearance near to zero. The cross-sectional length of hole  73  is located in the cross-sectional plane of FIG. 1 oriented perpendicular to the plane of FIG. 2. In the initial position the hole end remote from handle  15  is parallel to axis  10  and the end facing handle  15  is acutely inclined away from axis  10  in direction  13 . In the vicinity of this latter end the inclined cams  74  located on both sides of hole  73  slide on counter cams  17 . Jut  68  form a tray which is curved about axis  10  and includes an end face  76 . Face  76  is inclined to be conically flared in direction  13 . Face  76  is located on the radial outside of cam  69 . When cam  69  engages cutout  75  then face  76  forms a smooth continuation of the analogous end or inclined surface of shell  59 .  
         [0034]    A counter member  77  may be axially tensioned in direction  13  against face  76 . Member  77  thereby radially resiliently yields slightly. Member  77  is annularly continous about axis  10  and therefore tensioned against the end face of shell  59  in the same way. Thus member  77  sealingly closes this end of shell  18  and unit  4 . A sleeve-shaped member  78  protrudes beyond the tensioning end face of member  77  and out of the interior thereof in direction  13 . Member  78  has a twin-pitch male thread for mating with the female thread  79  of shell  59 . A rotation of maximum 180° or 90° is sufficient for screwing member  78  on or off. The inner circumference of sleeve  78  may sealingly contact the outer circumference of shell  58 ,  60 . Members  77 ,  78  may be in one part with a cap-shaped cover  80  fully receiving head  9  and shells  58 ,  60  while sealingly directly closing exit  20 . Cover  80  locks unit  4  against actuation without motion play and tensiones unit  4  radially toward axis  10 .  
         [0035]    Following removal of cover  80  the handle  15  is actuated by finger pressure in direction  14 , the cam  69  thereby unsnapping. Thus actuator  6  instantly moves in direction  13 , plunger  28  pressurizes the medium which fills chamber  26  entirely. Thereby valve  25  is tensioned in its closed position. After an axial stroke of between 2 mm and 3 mm valve  32  opens. Then the medium flows between piston  28  and core  29  in direction  12  into the shaft sections. The medium emerges axially as well as radially from the actuator  6  not before reaching openings  15 ,  51 . Then the medium is caused to rotate in chamber  55  whereafter it is atomized at the bound edge of exit  20 . In addition to the force of a return spring  81  a steeper increase of the actuating force is effected over the last stroke section, since the wings of handle  15  must be spreaded on circumference  63 . Spring  81  is located within chamber  26  and is permanently supported with axial pretension on core  29 . Valve  32  recloses automatically at the stroke end. Following its release handle  15  and cams  74  are first lifted off from member  17  by the resilient return action of its wings. Simultaneously spring  81  returns unit  3  and also unit  4  to their initial position which is stop limited. Thereby valve  25  opens due to evacuation of chamber  26 . Thus while valve  32  is closed medium is sucked from reservoir  7  into chamber  26  via duct  24 .  
         [0036]    For assembly pump  8  including ring  36  may be inserted in direction  12  into body  5  up to abutment. Thereby the entire actuator  6  can be inserted in the same direction through the passages provided in driver  16 , wall  19 , sleeve  60  and head  9 . The dimensions or the dimensional relationship shown are particularly favorable for use of the dispenser  1 . All components may consist of plastic material or produced as injection molded items. All properties and effects may be provided precisely as described, or merely roughly so or substantially so, but may also deviate therefrom even more so for corresponding applications. Except for the wings of handle  15 , plunger  28  and spring  81  each of the components or sections thereof as cited is dimensionally rigid in operation.