Delivery system for measured quantities of liquids, especially medications

A device for dispensing material from a container containing a liquid comprising:

• a housing for mounting said container for reciprocal movement therein, said housing comprising a liquid passage, said housing further comprising a pump mounted on said housing for dispensing material from an interior of said container, said container being separable from said housing and said pump, said pump comprising:
• (a) a pump stem for delivering liquid from said pump to an exterior of said container, said pump stem engaging said liquid passage, said pump stem being mounted to remain stationary relative to said housing;
• (b) a pump body mounted for reciprocal movement in said housing;
• and
• (c) an inlet passage for delivering liquid from said container to said pump;
• and
• a pump stroke limiting device mounted in said housing, said pump stroke limiting device limiting an amount of reciprocal movement of said pump body in said housing to thereby control a length of stroke of said pump.

A device for dispensing metered quantities of liquid material comprising:

• a container holding a quantity of material to be dispensed;
• a housing, said container being mounted for reciprocal movement in said housing, said housing including a liquid passage;
• a pump for dispensing material from an interior of said container, said pump including a pump stem for delivering liquid from said pump to an exterior of said container, said pump stem engaging said liquid passage;
• a driving piston connected to said container and mounted for reciprocal movement in said housing, whereby force applied to said driving piston reciprocates said container in said housing;
• and
• a pump stroke limiting device mounted in said housing, said pump stroke limiting device limiting an amount of reciprocal movement of said container in said housing to thereby control a length of stroke of said pump, said pump stroke limiting device comprising a series of stop surfaces on said driving piston and a housing stop surface on said housing, one of said series of stop surfaces interacting with said housing stop surface according to a rotational orientation of said driving piston to thereby limit an amount of reciprocal movement of said container in said housing.

A device for dispensing metered quantities of liquid material comprising:

• a container holding a quantity of material to be dispensed, said container comprising a dip tube;
• a housing, said container being mounted for reciprocal movement in said housing, said housing including a liquid passage, said housing comprising a pump mounted on said housing for dispensing material from an interior of said container, said pump comprising a pump stem for delivering liquid from said pump to an exterior of said container, said pump stem engaging said liquid passage, said pump comprising an element for piercing a seal on said container to provide fluid communication between an interior of said container and said pump, said element for piercing a seal comprising a tailpiece mounted on said pump, wherein said tailpiece fits into an interior of said dip tube after said element has pierced said seal;
• and
• a pump stroke limiting device mounted in said housing, said pump stroke limiting device limiting an amount of reciprocal movement of said container in said housing to thereby control a length of stroke of said pump.

A device for dispensing material from a container containing a liquid comprising:

• (a) a housing for mounting said container for reciprocal movement therein, said housing comprising a liquid passage;
• (b) a pump for dispensing material from an interior of said container, said pump comprising:
• (i) a pump stem for delivering liquid from said pump to an exterior of said container, said pump stem engaging said liquid passage, said pump stem being mounted to remain stationary relative to said housing;
• (ii) a pump body mounted for reciprocal movement in said housing;
• and
• (iii) an inlet passage for delivering liquid from said container to said pump;
• (c) a pump stroke limiting device mounted in said housing, said pump stroke limiting device limiting an amount of reciprocal movement of said pump body in said housing to thereby control a length of stroke of said pump, said pump stroke limiting device comprising a series of stop surfaces on said driving piston and a housing stop surface on said housing, one of said series of stop surfaces interacting with said housing stop surface according to a rotational orientation of said driving piston to thereby limit an amount of reciprocal movement of said container in said housing;
• and
• (d) a driving piston mounted for reciprocal movement in said housing.

A device for dispensing material from a container containing a liquid comprising:

• (a) a housing for mounting said container for reciprocal movement therein, said housing comprising a liquid passage, said housing further comprising a pump mounted on said housing for dispensing material from an interior of said container, said pump comprising:
• (i) a pump stem for delivering liquid from said pump to an exterior of said container, said pump stem engaging said liquid passage, said pump stem being mounted to remain stationary relative to said housing;
• (ii) a pump body mounted for reciprocal movement in said housing;
• and
• (iii) an inlet passage for delivering liquid from said container to said pump, said inlet passage comprising an element for piercing a seal on said container to provide fluid communication between an interior of said container and said pump, said inlet passage further comprising a tailpiece mounted on said pump, said lower end of said tailpiece comprising said element for piercing said seal;
• and
• (b) a pump stroke limiting device mounted in said housing, said pump stroke limiting device limiting an amount of reciprocal movement of said pump body in said housing to thereby control a length of stroke of said pump.