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Publication numberUS2547440 A
Publication typeGrant
Publication dateApr 3, 1951
Filing dateMay 15, 1948
Priority dateMay 15, 1948
Publication numberUS 2547440 A, US 2547440A, US-A-2547440, US2547440 A, US2547440A
InventorsHarold L Clark, Richard U Clark
Original AssigneeHarold L Clark, Richard U Clark
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Fluid conducting electrically insulated system
US 2547440 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

APll 3, 1951 H. L. CLARK ETAL 2,547,440

FLUID CONDUCTING ELECTRICALLY INSULATED SYSTEM Filed may 15, 194e LA" il I NTORS NAi/@M Cla/a4( /V/mAa/ Patented Apr. 3, 1951 FLUID CONDUCTING ELECTRICALLY INSULATED SYSTEM Harold L. Clark and Richard U. Clark, Belmont, Mass.

Application May 15, 1948, Serial N0. 27,298

2 Claims. 1

The present invention has for its purpose the provision of a means for very greatly increasing the electrical resistance of uid in a system, and that of the system, to ground, without impeding the ilow of said uid through the said system.

The said system may be a residential Water supply, a water or steam heating system, or similar installation, as used not only domestically, but also in shop, factory, office, laboratory, or the like.

A primary accomplishment of this invention is the safeguarding of life and limb, by eliminating the danger of electrocution that results from accidental contact with the live side of a grounded system while bathing, shaving, working, etc.

Other advantages of electrically insulating a water operated system, or uid conducting system, would be the possibility of applying to the system such separate electrical excitation as may be desired for various purposes such as thawing out frozen pipes, controlling electrolysis, providing an ungrounded radio aerial connection and so forth.

A simple embodiment of the device with which We accomplish the electrical insulation of a fluid conducting system is shown in the accompanying drawing.

Figure 1 shows a partially cut-away View of anC enclosed Water separating and insulating device.

Figure 2 is a longitudinal cross-sectional View of Figure 1.

Figure 3 is a plan View of a non-conducting pipe union.

Figure 4 is a longitudinal cross-section of Figure 3.

The structure of gure one is composed entirely of non-conducting material; rubber, plastic, glass, ceramic or the like except for a central shaft and two bearings. At l in Figure 1 is shown a suitable case with inlet pipe 2 and outlet pipe 3 and having a bearing located at 4 and a turbine like rotor 5 revolving within the case in a properly proportioned chamber 6. Rotor end plates 9 and wide blade ends are shown at I0.

In Figure 2 the rotor 5 with vanes l and shaft 8 is shown with one side plate removed and arrows indicating the direction of iluid flow that causes the rotor to revolve as it passes.

In Figure 4 the threaded pipe union of nonconducting material is shown to have a mechanical pipe stop at l I in the form of a central spacing flange. The device in Figures 3 and 4 is to be used in conjunction with that in Figures 1 and 2.

The device shown in Figures 1 and 2 would be inserted in series with all grounded fluid conducting pipes, carrying electrically conducting iluids, at the nearest convenient points to ground. Conducting fluid passing from any grounded position through the system must then pass through the device of Figures 1 and 2 and in passing revolve the rotor. In so doing the fluid would be divided into segments, mutually connected by very thin lms only, resulting in very high electrical resistance as between inlet and outlet. Connected in any system at points near ground this device would greatly increase the electrical resistance of the said supply system in respect to ground.

Having described our invention, We claim:

l. A system for handling conductive uids in insulated relation to a ground potential, comprising fluid conducting enclosures, a non-conducting encased rotary dispensing pump with input and output connections connected there-to, a high speed segmented impeller in said pump, minute clearances between said impeller and said casing, end and periphery baies on said impeller to further reduce iluid and electrical leakage between the input and output of said pump, said impeller being operable upon the introduction of uid flow in said system and to dispense segmented fluid portions at high speed.

2. A system according to claim 1 wherein an associated non-electrically conductive fluid dispensing system is non-conductively coupled there-to and means to provide said non-conductive coupling comprising connecting members oi' insulating material.


REFERENCES CITED The following references are of record in the

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Referenced by
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US2616950 *Oct 1, 1951Nov 4, 1952Directie Staatsmijnen NlApparatus for continuously determining the electrical conductivity of a liquid
US3866678 *Mar 15, 1973Feb 18, 1975Texas DynamaticsApparatus for employing a portion of an electrically conductive fluid flowing in a pipeline as an electrical conductor
US4532990 *Jul 1, 1983Aug 6, 1985Atlantic Richfield Co.Isolation of an electrical power transmission well
US4659899 *Feb 26, 1986Apr 21, 1987The Perkin-Elmer CorporationVacuum-compatible air-cooled plasma device
US4878622 *Jun 17, 1988Nov 7, 1989Ransburg CorporationPeristaltic voltage block
US4982903 *May 31, 1989Jan 8, 1991Ransburg CorporationPeristaltic voltage block
US5154357 *Mar 22, 1991Oct 13, 1992Ransburg CorporationPeristaltic voltage blocks
US5193750 *Mar 22, 1991Mar 16, 1993Ransburg CorporationPeristaltic voltage block roller actuator
US5411210 *Jun 5, 1992May 2, 1995Ransburg CorporationAutomatic coating using conductive coating materials
US5632816 *May 3, 1995May 27, 1997Ransburg CorporationVoltage block
US5746831 *May 3, 1995May 5, 1998Ransburg CorporationVoltage block
US5787928 *May 3, 1995Aug 4, 1998Ransburg CorporationValve structure
US5944045 *May 3, 1995Aug 31, 1999Ransburg CorporationSolvent circuit
US6423143Nov 2, 1999Jul 23, 2002Illinois Tool Works Inc.Voltage block monitoring system
US6918551Jul 17, 2003Jul 19, 2005Illinois Tool Works Inc.Dual purge manifold
US7455249Mar 28, 2006Nov 25, 2008Illinois Tool Works Inc.Combined direct and indirect charging system for electrostatically-aided coating system
EP0420912A1 *Jun 6, 1989Apr 10, 1991Ransburg CorpPeristaltic voltage block.
EP1097751A2Sep 25, 2000May 9, 2001Illinois Tool Works Inc.Voltage block monitoring system
EP1344568A2Jan 15, 2003Sep 17, 2003Illinois Tool Works Inc.Method and apparatus for dispensing coating materials
U.S. Classification174/8, 285/47, 174/138.00R, 174/30
International ClassificationB05B5/16
Cooperative ClassificationB05B5/165
European ClassificationB05B5/16A2D