Implantable manually actuated medication dispensing system
First Claim
1. A dispensing system for dispensing a metered volume of fluid from a reservoir to a dispensing port, comprising:
- a housing;
a reservoir;
means within said housing defining a fluid circuit serially including a first check valve, a safety pump, a second check valve, a metering pump, and a third check valve;
said safety pump being operable in response to the application of a first force applied externally to said housing for advancing fluid through said second check valve to said metering pump; and
said metering pump being operable in response to the application of a second force applied externally to said housing for advancing a predetermined volume of said fluid advanced from said safety pump through said third check valve to said dispensing port.
9 Assignments
0 Petitions
Accused Products
Abstract
An implantable manually-actuated dispensing system includes a housing wherein a reservoir and dispensing port are provided. Medicament within the reservoir is urged through the dispensing port in predetermined uniform dosages by a fluid circuit which serially includes a safety pump and a metering pump. The safety pump is first actuated and released to cause a quantity of medicament to be advanced through the fluid circuit into the chamber of the metering pump. The metering pump is next actuated to cause a predetermined dosage from the advanced medicament to be dispensed through the dispensing port. Check valves prevent reverse flow through the circuit and prevent medicament from entering the metering pump except upon actuation and release of the safety pump.
102 Citations
17 Claims
-
1. A dispensing system for dispensing a metered volume of fluid from a reservoir to a dispensing port, comprising:
-
a housing; a reservoir; means within said housing defining a fluid circuit serially including a first check valve, a safety pump, a second check valve, a metering pump, and a third check valve; said safety pump being operable in response to the application of a first force applied externally to said housing for advancing fluid through said second check valve to said metering pump; and said metering pump being operable in response to the application of a second force applied externally to said housing for advancing a predetermined volume of said fluid advanced from said safety pump through said third check valve to said dispensing port. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. An implantable manually-actuated dispensing system for dispensing a metered volume of fluid from a reservoir through a dispensing port, comprising:
-
an implantable housing defining a fluid circuit extending between the fluid reservoir and the dispensing port; safety pump means within said housing operable in response to a first applied force; metering pump means within said housing operable in response to a second applied force; said fluid circuit serially including said safety pump means and said metering pump means; said safety pump means being operable in response to the application of said first applied force for advancing said fluid along said fluid circuit to said metering pump, and preventing the flow of fluid from the fluid reservoir to said metering pump in the absence of said application of said applied force; and said metering pump means being operable in response to the application of a second applied force for advancing a predetermined volume of said fluid advanced from said first pump along said fluid circuit to the dispensing port. - View Dependent Claims (8, 9, 10, 11, 12)
-
-
13. An implantable dispensing system for dispensing a predetermined dosage of fluid from a reservoir to a dispensing site, comprising:
-
a housing defining first and second pump chambers and a fluid circuit serially interconnecting the reservoir, said chambers and the dispensing site; safety pump means including a first plunger disposed in said first pump chamber, said plunger being actuable by application of a first externally applied force to advance a predetermined volume of fluid from said first pump chamber through said fluid circuit to said second chamber; and metering pump means including a plunger disposed in said second pump chamber, said plunger being responsive to application of a second externally applied force for urging a predetermined dosage of fluid from said volume advanced by said safety pump means from said second chamber through said fluid circuit to the dispensing site. - View Dependent Claims (14, 15, 16, 17)
-
Specification