BREASTSHIELD WITH MULTI-PRESSURE AND EXPANSIBLE CHAMBER CONSTRUCTION, RELATED BREASTPUMP AND METHOD

摘要

Inner and outer shield parts (42a, 42b) of a breastshield (40) are joined to form an enclosure defining a pressurizable chamber. The inner shield part ha s at least a portion thereof movable relative to the outer shield part when th e chamber is subject to a negative or a positive pressure. The invention takes the form of a variety of different embodiments of breastshields and breastpumps for breastmilk pumping having sundry novel attributes and advantages.