Solid state sump pump control

• US 8,047,805 B2
• Filed: 08/31/2007
• Issued: 11/01/2011
• Est. Priority Date: 08/31/2007
• Status: Expired due to Fees

• Current Assignee: City of Memphis
• Original Assignee: City of Memphis
• Inventors: Washington, Curtis T., Morton, David K., Cox, Ricky W., Bourell, Alfred M. Jr., Truitt, Roderick C.
• Primary Examiner(s): Freay; Charles
• Assistant Examiner(s): Hamo; Patrick
• Application Number:
  US11/848,707
• Publication Number:
  US 20090060751A1
• Time in Patent Office: 1,523 Days
• Field of Search: 417/36, 417/44.1, 732/90.R
• US Class Current: 417/36
• CPC Class Codes: F04B 47/06 having motor-pump units situated at great depth
• CPC Class Codes: F04D 15/0218 the condition being a liquid level or a lack of liquid supply

Abstract

The present invention provides a sump pump control system. The system includes a mounting fixture fabricated from a corrosion resistant material, and an electrical control comprising solid state electrical components supported by the mounting fixture. The sump pump control system also includes a diving bell cover. The diving bell cover has an open bottom, and is dimensioned to cover the electrical components. The diving bell cover is releasably secured to a support surface of the mounting fixture. The electrical control controls the operation of a sump pump. Should water rise to a level of the electrical components due to failure of the sump pump or due to quickly rising water, the diving bell cover will prevent water from contacting the electrical components. A method of removing water from a subterranean vault is also provided herein.

Claims

1. A method of removing water from a subterranean vault, comprising:

securing a mounting fixture to a structure within the vault above a ground level, the mounting fixture comprising a support surface;

providing a sump pump control system having;

an electrical control comprising solid state electrical components connected to a chassis, wherein the chassis is supported on the support surface of the mounting fixture,

a diving bell cover having an open bottom and being releasably secured to the support surface of the mounting fixture, the diving bell cover being configured to encompass the electrical components on the support surface,

a sump pump assembly having a sump pump, a common probe, an “

on”

probe and an “

off”

probe,

wherein;

the electrical control controls the operation of the sump pump, and

the electrical components are mounted onto the chassis at a position above the bottom of the diving bell cover such that water will not contact the components in the event that water surrounds the diving bell cover; and

providing power to the sump pump assembly.

2. The method of claim 1, wherein the sump pump control system further comprises at least one latch for releasably securing the diving bell cover to the support surface of the mounting fixture, the at least one latch being fabricated from an elastomeric material;

and

the method further comprises securing the diving bell cover to the support surface of the mounting fixture using the at least one latch.

3. The method of claim 1, wherein the sump pump control system further comprises an externally operable test switch.

4. The method of claim 3, wherein the externally operable test switch comprises a magnetic reed switch, and the sump pump control further comprises a permanent magnet that may be passed over the diving bell cover in order to momentarily turn on and off the sump pump;

and

the method further comprises passing the magnet over the diving bell cover to temporarily activate the sump pump.

5. The method of claim 1, wherein the electrical components are sprayed-coated with a clear electrical waterproof coating.

6. The method of claim 1, wherein the electrical components comprise:

a solid state circuit board; and

a solid state power relay.

7. The method of claim 6, wherein the electrical components further comprise:

a hermetically sealed control relay with a base;

a transformer; and

a terminal strip.

8. The method of claim 1, wherein the electrical components comprise:

a digital counter for counting each on/off cycle of the sump pump.

9. The method of claim 1, further comprising:

attaching a desiccant cartridge for absorbing moisture to the chassis, the mounting fixture or an inner surface of the diving bell cover.

10. The method of claim 1, wherein the subterranean vault is an electrical substation.

11. The method of claim 1, wherein the subterranean vault contains both water and oil, and the method further comprises:

pumping water from the subterranean vault; and

discontinuing pumping water before significant amounts of oil are encountered by the sump pump.

12. The method of claim 1, wherein the mounting fixture and the chassis are both fabricated from a corrosion resistant material.