Donald Edwin Hargraves

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Huntersville, NC, US

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Patents Grantslast 30 patents

Information Patent Grant
Solenoid valve and method of assembly thereof
- Patent number 8,393,346
- Issue date Mar 12, 2013
- Parker-Hannifin Corporation
- Douglas Allan Curtis
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Method of assembling a pump motor and preloading bearings of the motor
- Patent number 8,096,043
- Issue date Jan 17, 2012
- Hargraves Technology Corporation
- Donald Edwin Hargraves
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Pump valve with controlled stroke
- Patent number 7,762,796
- Issue date Jul 27, 2010
- Hargraves Technology Corporation
- Donald Edwin Hargraves
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...

Patents Applicationslast 30 patents

Information Patent Application
METHOD OF ASSEMBLING A PUMP MOTOR WITH BEARING PRELOAD
- Publication number 20100132186
- Publication date Jun 3, 2010
- HARGRAVES TECHNOLOGY CORPORATION
- Donald Edwin Hargraves
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Application
SOLENOID VALVE AND METHOD OF ASSEMBLY THEREOF
- Publication number 20090321671
- Publication date Dec 31, 2009
- Hargraves Technology Corporation
- Douglas Allan Curtis
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Application
Pump motor with bearing preload
- Publication number 20060181168
- Publication date Aug 17, 2006
- Donald Edwin Hargraves
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Application
Pump valve with controlled stroke
- Publication number 20060177330
- Publication date Aug 10, 2006
- Hargraves Technology Corporation
- Donald Edwin Hargraves
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...