| 摘要 |
A constant pressure generator has a variable volume fluid reservoir formed by a container having fixed walls which cooperate to define a cross-sectional area of the container perpendicular to an axis that varies with location along the axis and an end wall arranged for movement along the axis to vary the volume of the reservoir and which is adapted to conform substantially to the fixed walls of the container to provide the region of variable area substantially that defined by the fixed walls. A force generator is engageable with the variable area region to exert a variable force thereon and the walls are shaped such that the area of the region varies interdependently with the exerted force as the volume varies to maintain the communicated pressure constant.
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