The Boc Group, Inc.

Datex-ohmeda, Inc.

Keith Whitaker

Robert E Braatz

Raymond S Gregory

David C Sampson

Robert A Heaton

A container (2) for a liquid anaesthetic agent for supplying the agent to an anaesthetic vaporizer comprises a reservoir for the liquid agent, a valve (6) which, when closed, prevents the flow of the liquid agent from the reservoir, a tubular outlet (10) through which the liquid can leave the reservoir when the valve is open. An O-ring (20) at the free end of the conduit provides a sealing surface for forming a seal with a corresponding sealing surface provided at an inlet to a vaporizer to which the anaesthetic agent is to be supplied. A flange (22) engages a guide on the vaporizer, to retain the container in contact with the vaporizer.

Container for liquid anaesthetic agent

A container (2) for a liquid anaesthetic agent for supplying the agent to an anaesthetic vaporiser comprises a reservoir for the liquid agent, a valve (6) which, when closed, prevents the flow of the liquid agent from the reservoir, a tubular outlet (10) through which the liquid can leave the reservoir when the valve is open. An O-ring (20) at the free end of the conduit provides a sealing surface for forming a seal with a corresponding sealing surface provided at an inlet to a vaporiser to which the anaesthetic agent is to be supplied. A flange (22) engages a guide on the vaporiser, to retain the container in contact with the vaporiser.

Container for anaesthetic agent

An anaesthetic vaporizer includes a concentration dial for controlling the concentration of anaesthetic leaving the vaporizer. The vaporizer is adapted to be mounted on a back bar of an anaesthesia machine. An exclusion pin is mounted adjacent the back bar and forms part of an interlock system for preventing rotation of the concentration dial when a second vaporizer is also mounted on the back bar and is dispensing anaesthetic vapor. A button assembly is mounted on the concentration dial and must be depressed before the concentration dial can be rotated. The button assembly incorporates an overload device which, if excessive force is applied to the button assembly in order to override the effect of the exclusion pin will render the button assembly inoperative.

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Keighley, United Kingdom

Keith Whitaker