Device for measuring pressure

Details Device for measuring pressure Device for measuring pressure

2007-08-21

2007-08-21

Allen, Andre J. (Department: 2855)

Measuring and testing

Fluid pressure gauge

Vibration type

Reexamination Certificate

active

11132441

ABSTRACT:
A pressure measuring device (2) includes a vibrating ferromagnetic cylinder (4) and mechanically located within a casing (6). A diaphragm (24) is directly connected to the cylinder and forms a pressure measurement surface. Pressure on the diaphragm (24) results in a force and stresses in the cylinder (4) which change the resonant frequency of the vibrating cylinder.

REFERENCES:
patent: 3021711 (1962-02-01), Arvidson
patent: 3199355 (1965-08-01), Simon-Suisse
patent: 3813934 (1974-06-01), Meyer
patent: 3863505 (1975-02-01), Moffatt
patent: 4102209 (1978-07-01), Brahm
patent: 4922745 (1990-05-01), Rudkin et al.
patent: 1016915 (1966-01-01), None
Geokon brochure, series 4500 transducers shown on pp. 8 and 9, Oct. 2003.
Weston Vibrating Cylinder Pressure Sensor, Weston Aerospace, Farnborough, UK, under product reference No. 7881 [illustrated in figure 5a of attached application and described on p. 2 of text].
PT4500 SERIES transducer; supplied by Geokon, Inc. of Lebanon, New Hampshire [illustrated in Fig. 6 of attached application and described on pp. 5 and 7 of text].

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