James Bruce Harmon

US Patent:

7080797, Jul 25, 2006

Filed:

Jun 25, 2004

Appl. No.:

10/877760

Inventors:

Brandon R. Doering - West Jordan UT, US
James C. Harmon - Salt Lake City UT, US
James G. Shaw - Draper UT, US

Assignee:

EnviroTech Pumpsystems, Inc. - Salt Lake City UT

International Classification:

B02C 23/36
B02C 23/02
F01D 5/12

US Classification:

241 4608, 2411856, 4151211

Abstract:

A centrifugal pump of the chopper type is disclosed which is structured with a chopper plate and impeller that are configured with an open eye or “hubless” arrangement such that processing of solids through the pump does not result in clogging of solids at or near the center of the impeller, thereby producing a dead zone. Because the configuration of the chopper pump of the present invention avoids the development of a central dead zone or clogging of solids, and provides for flow of solids and fluid through the eye of the impeller, pump efficiencies are markedly improved.

US Patent:

7118327, Oct 10, 2006

Filed:

Jul 16, 2004

Appl. No.:

10/893506

Inventors:

Brandon R. Doering - West Jordan UT, US
James C. Harmon - Salt Lake City UT, US

Assignee:

EnviroTech Pumpsystems, Inc. - Salt Lake City UT

International Classification:

F04D 29/70

US Classification:

4151211, 4151212

Abstract:

A pump impeller and associated cutting elements are disclosed which are especially designed and positioned near the periphery of the impeller to reduce the size of entrained solids in a pumped fluid, or slurry, and to expel such solids from the impeller, drive shaft and associated sealing mechanisms.

US Patent:

7168915, Jan 30, 2007

Filed:

Jul 20, 2004

Appl. No.:

10/894731

Inventors:

Brandon R. Doering - West Jordan UT, US
James C. Harmon - Salt Lake City UT, US

Assignee:

Envirotech Pumpsystems, Inc. - Salt Lake City UT

International Classification:

F04D 29/042

US Classification:

4151211, 415131, 415132

Abstract:

Axial adjustment apparatus is provided in a centrifugal pump to effect adjustment of the impeller relative to adjacent pump elements. Specifically preferred is adjustment apparatus in a chopper pump that provides adjustment of the impeller relative to a chopper plate to facilitate continuous efficient cutting of solids by the pump. The adjustment apparatus may also include adjustment structure for providing axial adjustment between the impeller and a plate-like member positioned adjacent the drive side of the impeller to effect adjustment of cutting tolerances in cutting elements positioned between the impeller and plate-like member. The invention further includes a seal mechanism configured and positioned to retain the seal height of the seals throughout continuous adjustment of the impeller.

US Patent:

7234657, Jun 26, 2007

Filed:

Jul 14, 2006

Appl. No.:

11/486530

Inventors:

Brandon R. Doering - West Jordan UT, US
James C. Harmon - Salt Lake City UT, US
James G. Shaw - Draper UT, US

Assignee:

Envirotech Pumpsystems, Inc. - Salt Lake City UT

International Classification:

B02B 1/00
B02C 17/02

US Classification:

241 55, 241 92

Abstract:

A centrifugal pump of the chopper type is disclosed which is structured with a chopper plate and impeller that are configured with an open eye or “hubless” arrangement such that processing of solids through the pump does not result in clogging of solids at or near the center of the impeller, thereby producing a dead zone. Because the configuration of the chopper pump of the present invention avoids the development of a central dead zone or clogging of solids, and provides for flow of solids and fluid through the eye of the impeller, pump efficiencies are markedly improved.

US Patent:

7455251, Nov 25, 2008

Filed:

Oct 11, 2006

Appl. No.:

11/546137

Inventors:

Brandon R. Doering - West Jordan UT, US
James C. Harmon - Salt Lake City UT, US
James G. Shaw - Draper UT, US

Assignee:

EnviroTech Pumpsystems, Inc. - Salt Lake City UT

International Classification:

B02C 23/36
F01D 5/12

US Classification:

241 4608, 2411856, 4151211

Abstract:

A centrifugal pump of the chopper type is disclosed which is structured with a chopper plate and impeller that are configured with an open eye or “hubless” arrangement such that processing of solids through the pump does not result in clogging of solids at or near the center of the impeller, thereby producing a dead zone. Because the configuration of the chopper pump of the present invention avoids the development of a central dead zone or clogging of solids, and provides for flow of solids and fluid through the eye of the impeller, pump efficiencies are markedly improved.

US Patent:

7784489, Aug 31, 2010

Filed:

Aug 9, 2006

Appl. No.:

11/501478

Inventors:

Greg Paulin - Alpine UT, US
James G. Shaw - Draper UT, US
James C. Harmon - Salt Lake City UT, US
James Northrup - Draper UT, US

Assignee:

EnviroTech Pumpsystems, Inc. - Salt Lake City UT

International Classification:

F16K 15/03

US Classification:

1375272, 415147

Abstract:

A check valve of the flapper type structured for use in a self-primer pump is structured for attachment to the pump casing in a manner that facilitates servicing of the check valve, and includes securement means that are positioned external to the casing and a flapper that is located through an opening of the casing in a manner that enables the servicing of the valve without dropping the flapper or the hardware into the interior of the pump.

US Patent:

20100313972, Dec 16, 2010

Filed:

Aug 23, 2010

Appl. No.:

12/861479

Inventors:

Greg Paulin - Alpine UT, US
James G. Shaw - Draper UT, US
James C. Harmon - Salt Lake City UT, US
James Northrup - Draper UT, US

Assignee:

ENVIROTECH PUMPSYSTEMS, INC. - Salt Lake City UT

International Classification:

F16K 15/03

US Classification:

1375272

Abstract:

A check valve of the flapper type structured for use in a self-primer pump is structured for attachment to the pump casing in a manner that facilitates servicing of the check valve, and includes securement means that are positioned external to the casing and a flapper that is located through an opening of the casing in a manner that enables the servicing of the valve without dropping the flapper or the hardware into the interior of the pump.