A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
A61M 16/18 (2006.01)
Patent
CA 2108553
2108553 9219303 PCTABS00017 An anaesthetic vaporiser comprises an inlet for a carrier gas, an outlet for carrier gas and anaesthetic agent, and a pump for delivering a quantity of an anaesthetic agent into a stream of carrier gas, the pump comprising (a) a chamber having an inlet port (37), a reservoir port (32) and an outlet port (41); (b) a valve member (31) which can be moved between a first position in which anaesthetic agent can flow through the chamber between the inlet port and the reservoir port, and a second position in which the agent can flow through the chamber between the reservoir port and the outlet port; (c) a reservoir (38) connected to the reservoir port in which the agent can be retained prior to delivery, the reservoir being defined by an expandable body (33); and (d) a drive unit (34, 35, 36) by which the reservoir body can be expanded or contracted, to receive or to expel the agent respectively.
Gowling Lafleur Henderson Llp
The Boc Group Plc
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