Michael L Stoffer

US Patent:

D667845, Sep 25, 2012

Filed:

Oct 1, 2010

Appl. No.:

29/376106

Inventors:

Dustin Mark Moysi - Mansfield OH, US
Michael L. Stoffer - Ashland OH, US

Assignee:

The Gorman-Rupp Company - Mansfield OH

International Classification:

1502

US Classification:

D15 7

US Patent:

D677701, Mar 12, 2013

Filed:

Aug 16, 2012

Appl. No.:

29/429791

Inventors:

Dustin Mark Moysi - Mansfield OH, US
Michael L. Stoffer - Ashland OH, US

Assignee:

The Gorman-Rupp Company - Mansfield OH

International Classification:

1502

US Classification:

D15 7

US Patent:

20200347946, Nov 5, 2020

Filed:

Apr 30, 2019

Appl. No.:

16/399190

Inventors:

- Mansfield OH, US
Michael L. Stoffer - Ashland OH, US
Craig S. Redmond - Lexington OH, US

International Classification:

F16K 17/04
F16K 37/00
F04D 9/02
F04D 15/00

Abstract:

A release valve for a self-priming pump includes a housing, a valve member, an exhaust outlet, a guide stem, a spring, and a bellows. The valve is positioned in a valve opening in the housing and is movable between an open and a closed position. The open position permits the travel of air and fluid through the opening. The closed position closes the valve opening. The valve plug is positioned in the valve opening responsive to pressure in the flow passageway of the housing. The guide stem is coupled to the valve plug and the spring is coupled to the guide stem. The bellows surrounds the spring.

US Patent:

20150118024, Apr 30, 2015

Filed:

Oct 24, 2014

Appl. No.:

14/523071

Inventors:

Bryce Thiel - Lexington OH, US
Michael Stoffer - Ashland OH, US

International Classification:

F04D 7/04
F04D 9/02
F04D 1/00

US Classification:

4151211

Abstract:

A centrifugal pump having an impeller assembly within a pump housing and a wear plate positioned in confronting relationship with the impeller assembly. The wear plate includes an annular wear plate portion defining an impeller side that confronts the impeller and further defines an annular portion defining an eye formed generally centrally and has a center point that is substantially aligned with a rotational axis of the impeller. The eye includes a plurality of peripheral notches separated by tooth-like spacer gaps. At least one protrusion extends from the eye towards the impeller at a predetermined angle. Inner and outer radial grooves are formed in the wear plate surface that confronts the impeller.