Method and apparatus for protecting the pump of a breast pump fr

Details Method and apparatus for protecting the pump of a breast pump fr Method and apparatus for protecting the pump of a breast pump fr

1989-11-14

1991-12-10

Yasko, John D.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604320, A61M 106

Patent

active

050714031

ABSTRACT:
Method and apparatus for restricting the passage of milk beyond a selected place in breast pump apparatus and for protecting the pump from fouling by milk. A barrier to the passage of human milk is disposed in an air passage interconnecting the vacuum pump and a breast-contacting hood or the like for receiving expressed milk. In conventional fashion, operation of a vacuum pump may result in the expression of milk into the hood, where it may be collected. The air being drawn toward the vacuum pump passes through a porous body that is normally substantially permeable to air. The porous body is impermeable to human milk. Accordingly, it serves as a barrier across the vacuum line and protects the pump. When contacted by human milk, the porous body becomes substantially impermeable to air, at least at the point of contact. Depending upon the extent of such contact, the amount of vacuum that reaches the interior of the hood is reduced or eliminated, thereby reducing or eliminating the further expression of milk.

REFERENCES:
patent: 2162076 (1939-06-01), Frimand
patent: 4740202 (1988-04-01), Stacey et al.
patent: 4794915 (1989-01-01), Larsson
patent: 4813931 (1989-03-01), Hauze
patent: 4857051 (1989-08-01), Larsson
patent: 4886494 (1989-12-01), Morifuji
patent: 4915691 (1990-04-01), Jones et al.
patent: 4929229 (1990-05-01), Larsson
Maier, W. DT-OS-2658322, Filed 12/22/76, Published 6/29/78.

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