Pressure gauge spring
US6758097B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 30, 2001 |
| Grant date | Jul 6, 2004 |
| Priority date | — |
| Expiry date | Nov 30, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L7/041
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The pressure gauge spring is a responsive and easy to manufacture gauge for connection to a pressure source. The spring assembly comprises a coiled hollow tube having a first end and a second end with a body portion therebetween, the hollow tube adapted to produce a displacement of the second end in response to a change in said pressure source to which said first end is connected. The second end of the body portion is sealed. The body portion of the spring assembly has a first longitudinal portion and a second longitudinal portion extending from proximate to said first longitudinal portion to said second end and substantially uniformly compressed along the second longitudinal portion to reduce volume thereby. A transition area is disposed between said first end and said first longitudinal portion of said hollow tube, and is compressed so as to form a continuous longitudinally extending ridge along said transition area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.