Valve assembly for use in medical devices

A medical device for the aspiration of fluids from a patient, the medical device comprising:

• a flexible valve means having distal and proximal surfaces;
• a housing assembly having said valve means operatively positioned therein a nd including an inlet opening, a secondary opening and an outlet opening therein in operative communication with said valve means and wherein said valve means is alternately movable between first and second positions wherein said valve means obstructs the flow of air through said outlet opening and allows the flow of air between said inlet opening and said secondary opening in said first position and said valve means obstructs the flow of air through said inlet opening and allows the flow of said between said secondary opening and said outlet opening in said second position;
• and
• wherein a pressure means is operatively associated with said secondary opening and a fluid receiving aspiration means is operatively associated with said inlet opening such that when excess pressure is created by said pressure means, said valve means is moved to said second position and when negative pressure is created by said pressure means, said valve means is moved to said first position.

A valve assembly adapted for use with a medical device wherein said valve assembly comprises:

• a valve disk having a conically shaped cross-section and proximal and distal surfaces;
• a housing assembly having said valve disk freely retained in an initial preloaded condition therein, said housing assembly including an inlet opening, a secondary opening and an outlet opening therein wherein said inlet opening and said secondary opening are adapted to be in flow communication in a first position of said valve disk and second secondary opening and said outlet opening are adapted to be in flow communication in a second position of said valve disk;
• and
• wherein said inlet opening is adapted to be operatively associated with a source of fluid or air and said secondary opening is adapted to be operatively associated with a fluid or air dispensing means and said outlet opening is adapted to be operatively associated with a receiving means such that said valve disk alternately obstructs the flow of fluid or air between said outlet opening said secondary opening and said inlet opening and said secondary opening.

A medical device for the delivery of medical fluid from a bulk container, the medical device comprising:

• a flexible valve disk having a generally conical shaped cross-section and distal and proximal surfaces, and
• a housing assembly having said valve disk operatively positioned therein and including an inlet opening, a secondary opening and an outlet opening therein in operative communication with said valve means and wherein said valve disk is freely retained in an initial preloaded condition in said housing assembly and movable between first and second positions wherein said valve disk obstructs the flow of fluid through said outlet opening and allows the flow of fluid between said inlet opening and said secondary opening in said first position and obstructs the flow of fluid through said inlet means and allows the flow of fluid between said secondary opening and said outlet opening in said second position;
• and
• wherein a syringe means is operatively associated with said secondary opening and wherein said valve disk is in said first position as fluid is drawn into said syringe means and said valve disk is in said second position as fluid is expelled from said syringe means.

A valve assembly adapted for use with a medical device wherein said valve assembly comprises:

• a valve means having proximal and distal surfaces;
• a housing assembly having said valve means operatively associated therewith, said housing assembly including an inlet opening, a secondary opening and an outlet opening therein wherein said inlet opening and said secondary opening are adapted to be in flow communication in a first position of said valve means and said secondary opening and said outlet opening are adapted to be in flow communication in a second position of said valve means;
• and
• wherein said valve means is a flexible member having a conically-shaped cross-section and wherein apex on said distal surface of said valve means is operatively positioned adjacent said outlet opening.