Focused dosimetry device and methods associated therewith

Abstract

A device 560, for administering multiple single doses of a medicated cream, includes a cartridge 562 having a barrel 564 for containing the cream, a plunger 608 for moving the cream from within the cartridge, and a stem 610 for moving the plunger within the cartridge. A carrier 612 is formed with a cartridge-receiving nest 712 for receiving the barrel 564. A plurality of spaced, transaxial grooves 726, 728, 730 and 732 are formed in the carrier 612 for receiving a flange 572 of the cartridge 562 during the dispensing of multiple, successive, single doses of the cream. The carrier 612 is formed with a pair of resilient ears 750 and 752 and a passage 738 for removably retaining the stem 610 with the carrier while allowing axial movement of the stem.

1 - 9 . (canceled)  
   
   
       10 . A focused dosimetry device, which comprises: 
 a cartridge formed with a barrel having a passage through the barrel between a proximal end of the barrel and an axially spaced distal end of the barrel;    the barrel having an exterior shape of a prescribed configuration;    a plunger locatable and movable within the passage of the barrel;    a stem having a distal end positionable through the proximal end, and to a position within the passage, of the barrel to facilitate movement of the plunger within the barrel;    the stem formed with a proximal end spaced from the distal end thereof;    the stem formed with an intermediate section along an axis of the stem between the distal end and the proximal end thereof;    the intermediate section of the stem formed with a prescribed cross section;    a carrier formed with a barrel-receiving nest;    means for removably retaining the barrel within the barrel-receiving nest;    means for removably retaining the intermediate section of the stem with the carrier; and    means for allowing the intermediate section of the stem to be moved along the axis of the stem relative to the support member.    
   
   
       11 . The focused dosimetry device as set forth in  claim 10 , which further comprises: 
 a flange formed on the barrel at the proximal end thereof;    a shelf formed on the carrier extending axially from a proximal end of the barrel-receiving nest toward a proximal end of the carrier; and    a plurality of spaced flange-receiving grooves formed transaxially in the shelf.    
   
   
       12 . The focused dosimetry device as set forth in  claim 11 , which further comprises: 
 a stop surface formed on the carrier for limiting movement of the stem toward the distal end of the barrel.    
   
   
       13 . The focused dosimetry device as set forth in  claim 10 , which further comprises: 
 the prescribed cross section of the intermediate section of the stem selected from the group consisting of a plus-sign cross section, a solid circular cross section, a hollow circular cross section, a solid square cross section, a hollow square cross section, a solid diamond cross section and a hollow diamond cross section.    
   
   
       14 . The focused dosimetry device as set forth in  claim 10 , wherein the means for removably retaining the stem with the carrier comprises: 
 a support member located on the carrier;    a passage formed through the support member;    an opening formed in the support member in communication with the passage to facilitate positioning of at least a portion of the intermediate section of the stem within the passage; and    means for biasingly engaging the intermediate section of the stem to maintain the intermediate section of the stem within the passage.    
   
   
       15 . The focused dosimetry device as set forth in  claim 10 , wherein the means for allowing movement of the stem with the carrier comprises: 
 a support member located on the carrier; and    a passage formed through the support member having a shape which conforms at least partially to the prescribed cross section of the intermediate section of the stem.    
   
   
       16 . The focused dosimetry device as set forth in  claim 14 , wherein the means for biasingly engaging comprises: 
 the support member being formed with a pair of ears normally spaced apart by a distance which defines a normal width of the opening;    the pair of ears being sufficiently resilient to be spread farther apart by a distance greater than the normal width of the opening to facilitate movement of the intermediate section of the stem through the opening and into and out of the passage; and    the ears formed with portions which engage adjacent portions of the intermediate section of the stem when the intermediate section is located in the passage to maintain the intermediate section within the passage.    
   
   
       17 . The focused dosimetry device as set forth in  claim 10 , which further comprises: 
 a thumb rest formed with a distal surface and a proximal portion;    the distal surface of the thumb rest being attached to the proximal end of the intermediate section; and    the proximal portion of the thumb rest being of a prescribed configuration.    
   
   
       18 . The focused dosimetry device as set forth in  claim 17 , which further comprises: 
 the prescribed configuration of the proximal portion of the thumb rest selected from the group consisting of a flat configuration, a concave configuration; a dished configuration; and a ring configuration.    
   
   
       19 . The focused dosimetry device as set forth in  claim 10 , which further comprises: 
 means formed on the carrier for facilitating the locating of the fingers of the user on the carrier during use of the device.    
   
   
       20 . The focused dosimetry as set forth in  claim 19 , wherein the means for facilitating comprises: 
 a plurality of spaced grooves formed on a first side of the carrier opposite a second side of the carrier which includes the barrel-receiving nest.    
   
   
       21 - 29 . (canceled)  
   
   
       30 . A method of dispensing successively two equal amounts of a substance from a distal end of a barrel containing the substance, which comprises the steps of: 
 placing a distal end of a stem through a proximal end of the barrel and into engagement with a plunger within the barrel;    placing the barrel with the stem at a first prescribed location;    moving the stem toward the distal end of, and relative to, the barrel thereby moving the plunger to dispense the substance from the distal end of the barrel;    moving a surface of the stem into engagement with a stop surface after the stem has travelled through a prescribed stem-travel distance, relative to the barrel, whereby a given amount of the substance has been dispensed from the distal end of the barrel;    moving the barrel with the stem to a second prescribed location in a proximal direction away from the first prescribed location whereby the surface of the stem is spaced from the stop surface by a distance equal to the prescribed stem-travel distance;    moving the stem toward the distal end of, and relative to, the barrel to dispense the substance from the distal end of the barrel; and    moving the surface of the stem into engagement with the stop surface after the stem has travelled through the prescribed stem-travel distance whereby an amount of the substance equal to the given amount has been dispensed from the distal end of the barrel.    
   
   
       31 . The method as set forth in  claim 30 , which further comprises the steps of: 
 removing the stem from the barrel after the given amount of the substance has been dispensed from the distal end of the barrel during a period when the barrel is at the first prescribed location; and    reinserting the proximal end of the stem through the proximal end of the barrel and into engagement with the plunger after the barrel has been moved to the second prescribed location.    
   
   
       32 . The method as set forth in  claim 30 , which further comprises the steps of: 
 providing a carrier having the stop surface at a proximal end thereof, a distal end, a first groove formed transverse to an axis of the carrier intermediate the proximal end and the distal end thereof, a second groove formed transverse to the axis of the carrier intermediate the proximal end and the distal end of the carrier and spaced from the first groove toward the proximal end of the carrier by a distance equal to the prescribed stem-travel distance, the first groove being closer to the distal end of the carrier than the second groove;    placing a flange of the barrel in the first groove on the carrier when the barrel is placed at the first prescribed location;    removing the flange of the barrel from the first groove on the carrier following the dispensing of the given amount of the cream; and    placing the flange of the barrel in the second groove on the carrier when the barrel is placed at the second prescribed location.    
   
   
       33 . The method as set forth in  claim 32 , which further comprises, prior to placing the distal end of the stem through the proximal end of the barrel and into engagement with the plunger within the barrel, the step of; 
 mounting an intermediate section of the stem on the carrier for movement of the stem relative to the carrier.    
   
   
       34 . The method as set forth in  claim 32 , which further comprises the step of: 
 mounting the barrel on the carrier in a stationary position relative to the carrier when the barrel is placed in the first prescribed location; and    mounting the barrel on the carrier in a stationary position relative to the carrier when the barrel is placed in the second prescribed location    
   
   
       35 . The method as set forth in  claim 32 , wherein the plunger has assumed a prescribed location within the barrel upon completion of the dispensing of the given amount, which further comprises the step of: 
 maintaining the plunger in the prescribed location at least during a period between the steps of removing of the flange from the first groove and the placing of the flange in the second groove.    
   
   
       36 . The focused dosimetry device as set forth in  claim 10 , which further comprises: 
 an insert located within the passage of the barrel between a proximal surface of the plunger and the distal end of the stem;    the insert formed with a first face positioned for engagement with the proximal surface of the plunger; and    the insert formed with a second face positioned for engagement with the distal end of the stem.    
   
   
       37 . The focused dosimetry device as set forth in  claim 10 , which further comprises: 
 an insert located within the passage of the barrel between a proximal surface of the plunger and the distal end of the stem;    a recess formed axially in the proximal surface of the plunger having a prescribed shape;    a projection extending in a distal direction from the insert and formed in a shape complementary to the prescribed shape for receipt of the projection within the recess; and    the insert formed with a face positioned for engagement with the distal end of the stem.    
   
   
       38 . The focused dosimetry device as set forth in  claim 10 , which further comprises: 
 a plunger head;    the plunger forming a compliant section of the plunger head with the compliant section facing the distal end of the barrel;    a receptor section of the plunger head facing the proximal end of the barrel, with the receptor section being comparatively more rigid than the compliant section;    a proximal end of the compliant section being coupled to a distal end of the receptor section;    a receptor opening formed in a proximal end of the receptor section of the plunger and having a prescribed configuration;    the stem having a stem structure at the distal end thereof which is generally complementary to the prescribed configuration of, and insertable into, the receptor opening; and    the prescribed configuration being structured to create a piloted engagement of the stem structure within the receptor opening and to preclude a taper-lock interference fit therebetween.    
   
   
       39 . A focused dosimetry device, which comprises: 
 a cartridge formed with a barrel having a passage therethrough between a proximal end thereof and an axially spaced distal end thereof;    the cartridge having an exterior shape of a prescribed configuration;    the cartridge formed with a flange at the distal end thereof;    a plunger locatable and movable within the passage of the barrel;    a stem having a distal end positionable within the barrel to facilitate movement of the plunger within the barrel;    a carrier formed with a cartridge-receiving nest having a shell-like opening which is generally complementary to the prescribed configuration of the exterior shape of the cartridge;    means for retaining the cartridge within the cartridge-receiving nest;    a shelf formed on the carrier extending axially from a proximal end of the cartridge-receiving nest; and    a plurality of spaced flange-receiving slots formed transaxially in the shelf.    
   
   
       40 . The focused dosimetry device as set forth in  claim 39 , which further comprises: 
 a plunger head;    the plunger forming a compliant section of the plunger head with the compliant section facing the distal end of the barrel;    a receptor section of the plunger head facing the proximal end of the barrel, with the receptor section being comparatively more rigid than the compliant section;    a proximal end of the compliant section being coupled to a distal end of the receptor section;    a receptor opening formed in a proximal end of the receptor section of the plunger and having a prescribed configuration;    the stem having a stem structure at a distal end thereof which is generally complementary to the prescribed configuration of, and insertable into, the receptor opening; and    the prescribed configuration being structured to create a piloted engagement of the stem structure within the receptor opening and to preclude a taper-lock interference fit therebetween.    
   
   
       41 . The focused dosimetry device as set forth in  claim 39 , which further comprises: 
 a stop surface formed at the proximal end of the shelf for limiting movement of the stem toward the distal end of the cartridge.