Measuring and testing – Volume or rate of flow – Expansible chamber
Patent
1983-12-15
1985-12-31
Caroff, Marc L.
Measuring and testing
Volume or rate of flow
Expansible chamber
G01F 314
Patent
active
045613044
ABSTRACT:
A positive displacement radial piston flowmeter includes pistons coupled to one another by connecting rods. Fluid passageways interconnect the cylinders and inlet and outlet ports formed in the housing. Piston movement is sensed by a pair of linear differential transducers, including exciter and sensing windings, mounted over the outer end of two adjacent cylinders. An elongate piston extension carrying a magnetic material reciprocates within the coils. Each sensing coil produces a voltage difference having a sinusoidal wave form so the two transducers produce a two phase sinusoidal signal (when demodulated) which allows sensing and control circuitry to make very accurate flow measurements. The coil housing is constructed so the electromagnetic properties at both sensing coils are equal to eliminate the need to compensate for initial signal bias or signal drift. The pistons are attached to the outer ends of the connecting rods through a universal joint to compensate for manufacturing tolerances. The passageways fluidly connected to the cylinders are positioned so that the top of the passageways are about even with the highest point of the cylinder. This allows the meter to be self-purging as to air and vapor which may become trapped within the meter.
REFERENCES:
patent: 168354 (1875-10-01), Swasey
patent: 1885517 (1931-05-01), Fraser
patent: 2014664 (1935-09-01), Nicholls
patent: 2116265 (1938-05-01), Hejduk et al.
patent: 2746430 (1956-05-01), Steen
patent: 2981240 (1961-04-01), Nelson et al.
patent: 3024374 (1962-03-01), Stauder
patent: 3101616 (1963-08-01), Klein
patent: 3344667 (1967-10-01), Maltby
patent: 3657925 (1972-04-01), Gross
patent: 3757581 (1973-09-01), Mankin et al.
patent: 3906793 (1975-09-01), Wurzbacher
patent: 4023056 (1977-05-01), Yamada et al.
patent: 4217507 (1980-08-01), Jaffe et al.
patent: 4450720 (1984-05-01), Max
Caroff Marc L.
Millard Wanda L.
LandOfFree
Positive displacement piston flowmeter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Positive displacement piston flowmeter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Positive displacement piston flowmeter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1018257