Flow meter with a motor driven impeller

Details Flow meter with a motor driven impeller Flow meter with a motor driven impeller

1982-04-19

1984-09-04

Goldberg, Gerald

Measuring and testing

Volume or rate of flow

Mass flow by imparting angular or transverse momentum to the...

7386233, G01F 180

Patent

active

044689721

ABSTRACT:
A liquid meter including a freely rotatable impeller driven by a constant speed drive. Liquid to be metered is introduced as a flow against, and accelerated by, the impeller. The energy necessary to accelerate the liquid is monitored to determine liquid flow. Preferably, the impeller is driven through a magnetic coupling which facilitates isolation of at least large portions of the drive from the liquid flow. One preferred embodiment employs a pair of spring coupled shutters with one shutter being magnetically coupled to the impeller. The displacement of the spring is dependent on liquid flow with that displacement being determined by photoelectrically monitoring the relative positions of the shutters. The power necessary to maintain the drive at constant speed may also, or alternatively, be monitored to determine liquid flow.

REFERENCES:
patent: 2714310 (1955-08-01), Jennings
patent: 2771773 (1956-11-01), Wallace
patent: 2775125 (1956-12-01), Peaceman
patent: 2907208 (1959-10-01), Taylor
patent: 3027473 (1962-03-01), Bodge
patent: 3104544 (1963-09-01), Guiot
patent: 3171280 (1965-03-01), Levins
patent: 3196675 (1965-07-01), Buchele et al.
patent: 3331244 (1967-07-01), Henderson
patent: 3625055 (1971-12-01), LaFourcade
patent: 4149411 (1979-04-01), Fisher et al.

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