Arrangement for maintaining gas in a variable volume container at a constant pressure
US6539975B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 31, 2002 |
| Grant date | Apr 1, 2003 |
| Priority date | — |
| Expiry date | Jan 31, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M16/0081
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A gas container has a gas inlet, a gas outlet, a variable-volume chamber connected to the gas inlet and the gas outlet and a constant force applicator acting on the variable-volume chamber so that constant gas pressure prevails in the variable-volume chamber, regardless of variations in the chamber's volume. The constant force applicator is formed by a spring and a force transfer mechanism that interact with each other through a center of rotation (14) and an application point. The force transfer mechanism varies the distance between the center of rotation and the application point according to the variation in the volume of the variable-volume chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.