Patent ID: 7658188
Filing Date: 2010-02-09
Classification: A61M

Abstract:
1. A manually operable volume-adjustable ventilation device, comprising: a reservoir with an inlet mechanism, an outlet mechanism, and a volume adjuster configured to move a volume adjustment limit of the reservoir and change an expressed maximum volume of the reservoir; wherein said reservoir comprises a body having a plurality of movable walls defining an enclosed volume; wherein said reservoir has an uncompressed state and a compressed state; wherein said walls are movable with respect to each other, such that moving said walls expresses the volume adjustment limit of the reservoir; wherein said walls are operably connected by movable structures; wherein a first wall and a second wall rotate about a first axis, and wherein a third wall rotates around a second axis wherein said second axis is substantially orthogonal to said first axis when the reservoir moves from an uncompressed to a compressed state.