Patent ID: 7662127
Filing Date: 2010-02-16
Classification: A61M

Abstract:
1. A breastshield for a breastpump, comprising: a breastshield sidewall; a part having an interior within which at least a portion of a woman's breast including a breast nipple is received and a longitudinal axis, said part having a flexible area formed thereon, said flexible area having a rest position at ambient pressure and being capable of moving relative to a breast received within said part, said flexible area having an inboard side facing the breast and an outboard side, said inboard side being formed by three sidewalls into a tri-part member, wherein a space between each of said three sidewalls and an inner surface of said breastshield sidewall defines three chambers; a first pressure source operating on said flexible area outboard side for moving said flexible area cyclically toward and away from said axis, said first pressure source generating a positive pressure to press said flexible area inboard relative to said rest position and toward said axis and a negative pressure alternating with said positive pressure to move said flexible area outboard relative to said rest position and away from said axis; and a second pressure source generating a negative pressure within said interior.