Absorber switch locking device
AssigneeOhmeda Inc.
InventorsDenise L. Pernetti, Richard C. Fries
Life of this patent
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Abstract
A locking device is disclosed for attachment to an absorber used in an anesthesia system and which provides assurance that the bag to ventilator switch cannot be put in the ventilator position for those applications where a ventilator is not intended to be used, i.e. MRI applications. As a further feature, the locking device also physically prevents the ventilator input to the bag to ventilator switch from being occluded, either by a protective plastic shipping cap or by having tubing or other conduits connected thereto.
Claims11
In an anesthesia system having an absorber, said absorber comprising a housing having a first inlet for receiving gas from a ventilator, and a second inlet for receiving gas from a closed bag, and having an outlet for delivering gas to a patient, switch means within said housing normally movable between a first position where said first inlet is connected to said outlet and a second position where said second inlet is connected to said outlet, the improvement comprising a locking means affixed to said housing and retaining said switch in said second position, said locking means further preventing said first inlet from being closed.
A bag to ventilator switch for use in an anesthesia system, said switch having a housing having a first inlet adapted to receive gas from a ventilator and a second inlet adapted to receive gas from a flexible bag and having an outlet to provide gas to a patient, said housing enclosing a switch normally movable between a first position wherein said first inlet communicates with said outlet and a second position wherein said second inlet communicates with said outlet, said switch having an upstanding shaft operable to move said switch between said two positions, said upstanding shaft extending exterior of said housing, and locking means affixed to said housing and affixed to said upstanding shaft exterior of said housing to lock said shaft and said switch in said second position and to prevent said upstanding shaft from moving said switch to said first position.
A locking device adapted to be affixed to the exterior of an absorber head having an inlet for receiving gas from a ventilator and a switch having an upstanding pivoting shaft to move the switch between two positions, said locking device comprising a first component adapted to be affixed to the head of the absorber and having an extending arm blocking the ventilator inlet to the absorber and a second component adapted to interlock with said first component and having a recess sized to interfit over the upstanding pivoting shaft to lock said upstanding shaft into only one of its two positions.
Dependencies are inferred from the claim text.