Breast shield with vacuum isolation element
US5941847A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 6, 1998 |
| Grant date | Aug 24, 1999 |
| Priority date | — |
| Expiry date | Feb 6, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M1/066
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A breast shield is provided that includes a hood body with an outer rim within which a breast is received and a shield extension portion extending downstream from the outer rim. A milk drain is connected to the shield extension portion. A vacuum isolation element including a collapsible membrane is connected to the shield extension portion of the hood body. The collapsible membrane portion includes an interior cavity communicating with the vacuum source. The interior cavity is effective to create a negative pressure within the shield extension portion when collapsed by vacuum to isolate the vacuum source from expressed milk, with milk being channelled through the insert to a collector, such as a milk bottle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.