Contractile unit having a position sensor means
US7104182B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 9, 2003 |
| Grant date | Sep 12, 2006 |
| Priority date | — |
| Expiry date | May 9, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B15/103
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A contractile unit comprising a contractile hose extending between two spaced head pieces and adapted to perform a longitudinal contraction on being subjected to internal pressure, and a position sensor means responsive to the distance between the head pieces. The position sensor means possesses a microwave generator arranged on one of the head pieces and adapted to emit microwaves into the interior space of the contractile unit, an evaluating means being provided responsive to the distance between the head pieces using transit time measurement, phase comparison of the emitted and reflected wave or using determination of the resonant frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.