Hands-free breast pump with balanced reciprocating drive

Details Hands-free breast pump with balanced reciprocating drive Hands-free breast pump with balanced reciprocating drive

A - Human Necessities

61

M

A61M 1/06 (2006.01)

Patent

CA 2685617

A hands-free breast pump that includes a balanced push-pull reciprocating drive system that applies pumping force to a vacuum chamber formed by a breast interface cup during inward and outward pump strokes. The breast pump includes a breast cup that has a resilient bellows structure that partially collapses the volume of the vacuum chamber during the inward stroke and recovers the volume of the vacuum chamber during the outward stroke. The pump mechanism includes a cam drive system that translates rotary electric motor power into reciprocating linear action of an actuator arm that drives the bellows structure. The bellows structure acts like a spring that charges (resists the pump force) during the inward stroke and discharges (assists the pump force) during the outward stroke, and the shape of the cam track is designed to produce a desired operating profile for the pump.

L'invention concerne un tire-lait mains libres comprenant un système d'entraînement en va-et-vient par poussée-traction équilibré qui applique une force de pompage à une chambre à vide formée par une coupelle d'interface avec un sein, pendant des courses de pompage entrer et aller. Le tire-lait comprend une coupelle de sein possédant une structure de soufflets souple réduisant partiellement le volume de la chambre à vide pendant la course entrée, et rétablissant le volume de la chambre à vide pendant la course aller. Le mécanisme de pompage comprend un système d'entraînement à came transformant la puissance électrique rotative du moteur en une action linéaire de va-et-vient d'un bras d'actionneur qui entraîne la structure de soufflets. La structure de soufflets agit comme un ressort qui charge (qui résiste à la force de pompage) pendant la course entrer et décharge (aide la force de pompage) pendant la course aller, et la forme de la piste de came est conçue de manière à produire le profil de fonctionnement souhaité pour le tire-lait.

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