Title:
MEASURING AND READING THE SIZE OF A PARAMETER OF A REMOTELY POSITIONED DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/000578
Kind Code:
A3
Abstract:
Piston- chamber combination having sensor means (15) for measuring a parameter in the chamber (78) like pressure or temperature, which can be read on a display. In order to measure the said parameter in a more accurately way, without fluctuations, the sensor means measures inside an enclosed measuring space (47, 90) which is connected with the chamber by means of two passages. The first passage is provided with a check valve (49). The second passage is provided with a second valve (94, 95, 98) which is actuated solely by the forces resulting from the pressure difference between the enclosed measuring space and the chamber. In a further embodiment, the said second valve is controlled by a computer on the basis of the parameter value measured by the sensor means.
Inventors:
VAN DER BLOM NICOLAAS (GB)
Application Number:
PCT/EP2010/004024
Publication Date:
April 07, 2011
Filing Date:
June 30, 2010
Export Citation:
Assignee:
NVB INTERNAT UK LTD (GB)
VAN DER BLOM NICOLAAS (GB)
VAN DER BLOM NICOLAAS (GB)
International Classes:
F04B33/00
Foreign References:
| US4919600A | 1990-04-24 | |||
| US20040086404A1 | 2004-05-06 | |||
| US5779457A | 1998-07-14 | |||
| EP1179140B1 | 2005-12-21 |
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