Low profile inlet valve for a piston pump therapeutic substance delivery device
0 Assignments
0 Petitions
Accused Products
Abstract
Low profile inlet valve embodiments for a piston pump therapeutic substance infusion device are disclosed that reduce dead volume, occupies little residential space, operates rapidly, and have many other improvements. The therapeutic substance infusion device has a housing, a therapeutic substance reservoir, a power source carried in the housing, electronics, a piston pump, and an inlet valve. The piston pump is configured for pumping therapeutic substance from the therapeutic substance reservoir through an infusion port at a programmed rate. The inlet valve is in fluid communication with a reservoir outlet to control the flow of therapeutic substance into the piston pump. The inlet valve has a substantially coplanar valve surface and valve spring. Many embodiments of the low profile inlet valve and its methods of operation are possible.
57 Citations
49 Claims
-
1-10. -10. (canceled)
-
11. A therapeutic substance delivery piston pump having a low profile inlet valve, comprising:
-
a pump cylinder having an inlet enclosure with a therapeutic substance inlet coupled to a reservoir outlet and an outlet enclosure with an infusion outlet;
a pump piston moveable within the pump cylinder, the pump piston having a piston fluid path, a piston inlet end and a piston outlet end, the pump piston forming an inlet chamber between the pump piston and the inlet enclosure and a pumping chamber between the pump piston and the outlet enclosure;
an outlet valve carried on the outlet enclosure, the outlet valve configured to control the flow of therapeutic substance from the pumping chamber into the infusion outlet; and
,an inlet valve carried on the pump piston in operating relation to the piston fluid path, the inlet valve having substantially a coplanar valve surface and valve spring configured to control the flow of the therapeutic substance into the inlet chamber. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
-
-
20. An implantable therapeutic substance delivery piston pump with a low profile inlet valve, comprising:
-
a pump cylinder having an inlet enclosure and an outlet enclosure;
a therapeutic substance inlet coupled to the therapeutic substance reservoir and coupled to the inlet enclosure;
an infusion outlet coupled to the outlet enclosure;
a means for pumping to pump therapeutic substance from the therapeutic substance reservoir through an infusion outlet at a programmed rate, the means for pumping having a pump piston and a pump chamber;
a means for outlet valving to control therapeutic substance flow out of the pump chamber; and
,a means for inlet valving to control therapeutic substance flow into the pump chamber from an inlet chamber. - View Dependent Claims (21, 22)
-
-
23-40. -40. (canceled)
-
41. A therapeutic substance delivery piston pump having a low profile inlet valve, comprising:
-
a pump cylinder having an inlet enclosure with a therapeutic substance inlet coupled to a reservoir outlet and an outlet enclosure with an infusion outlet;
a pump piston moveable within the pump cylinder, the pump piston having a piston fluid path, a piston inlet end and a piston outlet end, the pump piston forming an inlet chamber between the pump piston and the inlet enclosure and a pumping chamber between the pump piston and the outlet enclosure;
an outlet valve carried on the outlet enclosure, the outlet valve configured to control the flow of therapeutic substance from the pumping chamber into the infusion outlet; and
,an inlet valve carried on the pump piston in operating relation to the piston fluid path, the inlet valve formed from a flat body having a substantially coplanar valve surface and valve spring configured to control the flow of the therapeutic substance into the inlet chamber. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49)
-
Specification