| 摘要 |
A pump that can be adjusted to vary the volumetric output of the pump. The pump has a flexible housing that defines an inner pump chamber. The flexible housing can be collapsed by the user to discharge the contents of the inner chamber. Integral with the housing is an outer spring that returns the pump to the original extended position when the housing is released by the user. The pump further includes one-way valves that allow air to flow into and out of the inner chamber. Wrapped around the housing is a belt that controls the extended volume of the inner chamber and the corresponding volumetric output of the pump. The belt can be adjusted to vary the size of the inner chamber and the volumetric output of the pump. The belt may have different settings that define the amount of air provided by the pump. When used as part of a resuscitator unit, the belt can be adjusted to match the volumetric output of the pump with the lung capacity of the patient. |
