Kenneth R Hoffer

US Patent:

59922303, Nov 30, 1999

Filed:

Nov 15, 1997

Appl. No.:

8/971229

Inventors:

Thomas J. Scarpa - late of Edinboro PA
Kenneth R. Hoffer - Hertford NC
Robert Hayman - Elizabeth City NC

Assignee:

Hoffer Flow Controls, Inc. - Elizabeth City NC

International Classification:

G01F 304

US Classification:

73261

Abstract:

A positive displacement flow meter includes a pair of smooth oval shaped rotors mounted to a pair of spaced apart rotatable shafts contained within a sealed housing. The rotatable shafts penetrate the measuring chamber and have a pair of toothed, oval shaped timing gears located in a separate gear cavity chamber which are responsible for synchronizing and maintaining the relative orientation of the smooth faced rotors with respect to one another. The fluid that is being metered forms seals between the rotating surfaces of the rotors, as well as between the rotors and the wall of rotor chamber, thus the inlet and outlet plenums are physically isolated and are consequently not in direct communication at any point during the rotation cycle of the rotors. Thus, each rotation of the rotors results in the transport of a precise and known volume of fluid from the inlet plenum to the outlet plenum. A magnetic sensing/counting system, which includes an magnetic actuator attached to one of the rotor shafts and a magnetic sensor mounted to the flow meter housing, monitors the rotation rate of the rotors and hence the flow rate of the fluid passing through the meter.

Address:

107 Kitty Hawk Ln, Elizabeth City, NC 27909

Phone:

2523311997

VIN:

1GTR2WE28CZ211414

Make:

GMC

Model:

SIERRA 1500

Year:

2012

Address:

107 Kitty Hawk Ln, Elizabeth City, NC 27909

Phone:

2523311997

VIN:

JN8AZ1MW7BW177485

Make:

NISSAN

Model:

MURANO

Year:

2011