Drug delivery means
First Claim
1. A drug delivery device comprising a holding reservoir, a pump, a delivery reservoir and an outlet, said holding reservoir being connected to said delivery reservoir through said pump by a connection, said pump being operable manually whereby fluid is transferred from the holding reservoir to the delivery reservoir, said delivery reservoir being connected to the outlet through a flow restriction which controls flow to the outlet, said delivery reservoir being resiliently expandable to a maximum volume wherein the connection between the holding reservoir and the delivery reservoir permits flow only from the holding reservoir to the delivery reservoir while the pressure within the delivery reservoir is less than a maximum pressure, said connection having a control device for redirecting flow to the holding reservoir upon the pressure within the delivery reservoir attaining said maximum pressure, said delivery reservoir being accommodated within the holding reservoir.
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Accused Products
Abstract
A drug delivery means comprising a holding reservoir (11), a pumping means (16), a delivery reservoir (23) and outlet (25), said holding reservoir (11) being connected to the delivery reservoir (23) through the pump (16) where the pump (16) is operable manually to effect transfer of fluid from the holding reservoir (11) to the delivery reservoir (23), the delivery reservoir (23) being connected to the outlet (25) through a flow restriction means (27) which controls the flow to the outlet (25), the delivery reservoir being formed to be resiliently expandable to a maximum volume and wherein the connection between the holding reservoir (11) and delivery reservoir (23) prevents pressurisation of the delivery reservoir (23) substantially beyond a predetermined pressure which will be achieved on the delivery reservoir (23) obtaining its maximum volume, a control means (30) provided with the delivery reservoir to prevent further pressurisation of the delivery reservoir (23) substantially beyond the predetermined pressure, said delivery reservoir (23) being accommodated within the holding reservoir (11).
39 Citations
19 Claims
- 1. A drug delivery device comprising a holding reservoir, a pump, a delivery reservoir and an outlet, said holding reservoir being connected to said delivery reservoir through said pump by a connection, said pump being operable manually whereby fluid is transferred from the holding reservoir to the delivery reservoir, said delivery reservoir being connected to the outlet through a flow restriction which controls flow to the outlet, said delivery reservoir being resiliently expandable to a maximum volume wherein the connection between the holding reservoir and the delivery reservoir permits flow only from the holding reservoir to the delivery reservoir while the pressure within the delivery reservoir is less than a maximum pressure, said connection having a control device for redirecting flow to the holding reservoir upon the pressure within the delivery reservoir attaining said maximum pressure, said delivery reservoir being accommodated within the holding reservoir.
Specification