Vacuum setting and indication system for a drainage device
US6976977B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 5, 2001 |
| Grant date | Dec 20, 2005 |
| Priority date | — |
| Expiry date | Nov 20, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/2084
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A drainage device comprising an improved vacuum regulator assembly is disclosed which includes an adjustable knob for indicating the degree of vacuum being applied to the device from a number of incident viewing angles. Similarly, a vacuum indicator assembly is provided for indicating the presence or absence of vacuum being applied to drainage device. The indicator assembly provides an indication of vacuum inside drainage device from many viewing angles and includes a base defining a recess having a slanted surface with a vacuum symbol which is selectively masked by a collapsible thimble when vacuum is applied or removed from the drainage device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.