Water meter system

• US 5,261,275 A
• Filed: 09/12/1991
• Issued: 11/16/1993
• Est. Priority Date: 09/12/1991
• Status: Expired due to Fees

• Current Assignee: Robert J. Davis
• Original Assignee: Robert J. Davis
• Inventors: Davis, Robert J.
• Primary Examiner(s): Goldstein, Herbert
• Assistant Examiner(s): BIEGEL, RONALD L
• Application Number:
  US07/758,582
• Time in Patent Office: 796 Days
• Field of Search: 73/257, 73/258, 73/861.77, 73/253, 418/50, 418/53
• US Class Current: 73/258
• CPC Class Codes: G01F 3/12 Meters with nutating members, e.g. discs

Abstract

A device which monitors the through passage of incompressible fluids such as water that relies upon a nutating disk-type transducer associated with a spherical hollow core. The disk includes a spindle which precesses in the presence of a sensor. A display panel is driven by a microcontroller which converts the precession of the spindle to useful output as a function of time whereby the precession correlates with volume flow through the nutating disk transducer.

Claims

1. A water meter comprising in combination:

a housing formed from an upper portion and a lower portion having a divider plate integrally disposed therein,

said divider plate extending between said upper portion and said lower portion oriented adjacent walls of a water inlet and a water outlet such that water from said water inlet is diverted into said housing, and prevented from passing directly from said inlet to said outlet,

a nutating disk supported in said housing, said disk having a spherical core and elongate slot radially extending outwardly from said spherical core and straddling said divider plate,

whereby water contacts said disk causing nutation,

said spherical core supports a spindle extending perpendicularly from both said core and said disk, said spindle precessing in response to water flow,

sensing means coupled to said spindle to monitor precession of said spindle, said sensing means including said spindle formed from a non-light transmitting substance, said sensing means also including a light source and a light sensor oriented such that light from said light source is detected by said light sensor except when said spindle passes between said light source and said light sensor.

and display means coupled to said sensing means for providing an output correlative of water flow through said housing.

2. The meter of claim 1 wherein said housing is formed from said upper portion and said lower portion interconnected by means of a tongue-and-groove interconnection around an outer periphery,

said housing having an annular mid-portion circumscribing said disk except for said water inlet and water outlet, said housing having a substantially "bow-tie" shaped configuration in section,

and said housing including centrally disposed upper and lower arcuate concave recesses adapted to receive said spherical core therewithin, said core formed as a hollow body with access to said hollow body precluded by said lower arcuate concave recess.

3. The meter of claim 2, wherein said upper arcuate recess precludes the through passage of water to a tower which circumscribes said upper housing portion, said tower providing support for said sensing means and said spindle extending within said tower.

4. The meter of claim 3 wherein said spindle includes a substantially conical bearing having said conical bearing diverge outwardly away from said spherical core, said conical bearing fixed on said spindle from axial translation but capable of rotational motion on said spindle, a washer and push-nut holding said conical bearing on said spindle.

5. The meter of claim 4 wherein said conical bearing coacts against a race depending down from a top wall of said tower with said conical bearing juxtaposed tangent to said race.

6. The meter of claim 5 wherein said nutating disk includes beveled edges adjacent said housing where said disk and an inner arcuate annulus come in contact, said beveled edge formed from a resilient flexible material, such that said beveled edge of said disk maintains a seal between said disk and said inner arcuate annulus.

7. The meter of claim 6 wherein said nutating disk includes a beveled edge where said disk comes in contact with said divider plate.

8. The meter of claim 7 wherein said nutating disk is formed from a composite having a rigid central core and an outer periphery formed with a flexible polymer seal such that sealing characteristics between said disk and said housing are enhanced.

9. The meter of claim 8 wherein said tower is concentrically circumscribed by a perimeter which is substantially the same diameter as said nutating disk, said perimeter providing support for said sensing means and at a topmost portion of said perimeter a cover is positioned.

10. The meter of claim 9 wherein said cover includes a cap within which resides said display, said cap having fastening means between said cover and said periphery.

11. The meter of claim 10 wherein said display includes a microcontroller which receives output from said sensors and is initialized by a time-based crystal, and said microcontroller is controlled by a plurality of panel-switches to control past and present periods, volume of fluid used, stop and start functions and time and volume parameters, and wherein an alarm is operatively coupled to said microcontroller which is activated upon exceeding of a preset amount of water to be used.

12. The meter of claim 11 wherein said microcontroller communicates with a display and is powered by a battery and, interposed between said microcontroller and said display is a current source and current sinks;

and wherein said display is taken from a group of displays including light emitting diode (LED) type displays and liquid crystal displays (LCD).

13. The meter of claim 12 including a nonvolatile ram in operative communication with said microcontroller such that data can be transferred therebetween, and wherein said nonvolatile ram can store information related to past measurements recorded by said microcontroller for comparison to current usage.

14. The meter of claim 1 wherein said nutating disk includes beveled edges adjacent said housing where said disk and an inner arcuate annulus come in tangential registry.

15. The meter of claim 14 wherein said nutating disk includes a beveled edge where said disk comes in tangential registry with said divider plate.

16. The meter of claim 15 wherein said nutating disk is formed from a composite having a rigid central core and an outer periphery formed with a flexible polymer seal to enhance sealing characteristics.

17. The meter of claim 1 wherein said display means includes a microcontroller which receives output from said sensor means and is initialized by a time-based crystal, and said microcontroller is controlled by a plurality of panel-switches to control past and present periods, volume of fluid used, stop and start functions and time and volume parameters.

18. The meter of claim 17 wherein said microcontroller communicates with a display and is powered by means of a battery and, interposed between said microcontroller and said display is a current source and current sinks;

and wherein said display is taken from a group of displays including light emitting diode (LED) type of displays and liquid crystal displays (LCD).

19. A method for surveying the throughput of an incompressible fluid which includes routing the incompressible fluid through a meter which includes a nutating disk having a spherical central core with a hollow central portion and a slot extending radially from the spherical core on the disk and outwardly, orienting the disk within a housing so as to straddle a divider plate strategically placed within the housing in order to segment incompressible fluid flow to both an inlet branch and an outlet branch, and having a spindle which extends upwardly from the spherical core to a tower within which is supported a sensor which monitors precession of the spindle as a function of disk nutation and therefore precession of a central axis of the spherical core, providing a bearing surface on the spindle to support the spindle during its precession and a corresponding concave recess for supporting the spherical core within the housing, and connecting the sensing instrumentality to a display, and preventing passage of fluid between an outer edge of the disk and the housing by equipping the disk with a flexible beveled edge, the beveled edge being constructed to sweep against the housing without allowing fluid to pass therebetween.