Measuring and testing – Fluid pressure gauge – Piston
Patent
1993-10-04
1995-09-26
Chilcot, Jr., Richard E.
Measuring and testing
Fluid pressure gauge
Piston
73744, 73752, 73746, 73706, 73715, 73756, G01L 708
Patent
active
054526132
ABSTRACT:
A device for determining a pressure of gas in an evacuated chamber including a cylinder positioned in fluid communication with the evacuated chamber with the cylinder forming a compressed gas chamber, a reciprocating piston received within the cylinder and mounted for reciprocal movement therein, a port or valve for providing selective fluid communication between the compressed gas chamber and the evacuated chamber is disclosed. A drive mechanism is provided for reciprocating the piston between a retracted position, where the compressed gas chamber communicates with the evacuated chamber, and an extended position where communication between the compressed gas chamber and the evacuated chamber is interrupted, the position being a position where a pressure transducer determines that a predetermined pressure differential between the chambers has been reached. In the preferred embodiment, a stepper motor is used to measure a distance travelled by the piston at the point where the predetermined pressure differential is reached. Utilizing these parameters, a processor then determines the pressure of the gas within the evacuated chamber.
REFERENCES:
patent: 4246799 (1981-01-01), Myles
patent: 4413526 (1983-11-01), Delajoud
patent: 4431985 (1984-02-01), Mott
patent: 4527430 (1985-07-01), Leathers
patent: 4730496 (1988-03-01), Knecht et al.
patent: 4823603 (1989-04-01), Ferran et al.
patent: 5022270 (1991-06-01), Rud, Jr.
patent: 5040579 (1991-08-01), Kawamura et al.
patent: 5134887 (1992-08-01), Bell
patent: 5157973 (1992-10-01), Ciminelli
patent: 5161415 (1992-11-01), Kodama et al.
patent: 5174157 (1992-12-01), Obermeier et al.
patent: 5212989 (1993-05-01), Kodama et al.
patent: 5222397 (1993-06-01), Kodama
patent: 5307685 (1994-05-01), Bloome et al.
patent: 5319981 (1994-06-01), Mei et al.
Pressure Gauge Handbook, Edited by Philip W. Harland, Metek-U.S. Gauge Division p. 10.
Pressure Measurement in Vacuum Systems, by J. H. Leck, Second Edition (Chapman & Hall, London 1964, pp. 3-7.
Bills Daniel G.
Borenstein Michael D.
Artis Jewel V.
Chilcot Jr. Richard E.
Ferguson Jr. Gerald J.
Granville-Phillips Company
Studebaker Donald R.
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