| HARGRAVES TECHNOLOGY CORPORATION Patent applications |
| Patent application number | Title | Published |
|---|
| 20100132186 | METHOD OF ASSEMBLING A PUMP MOTOR WITH BEARING PRELOAD - A non-reciprocating motor adapted for driving a reciprocating load is assembled by selecting a housing, a first bearing, a second bearing, and a rotor assembly having a shaft, all having corresponding predetermined coefficients of thermal expansion. The first and second bearings are positioned in the housing. The rotor assembly is rotatably mounted in the housing with the shaft received in the first and second bearings, such that the rotor is in a first position in which it has a predetermined amount of axial and radial play relative to the housing. A biasing element is installed and forces the rotor assembly to a second position in which play is eliminated. Each race is then permanently secured such that the rotor assembly is retained in the second position over a temperature range of about minus 40 degrees to about 105 degrees Celsius. | 06-03-2010 |
| 20090321671 | SOLENOID VALVE AND METHOD OF ASSEMBLY THEREOF - A valve assembly includes a housing having a valve bore, a valve seat, and at least one port communicating with the bore. A moveable plunger resides in the valve bore and selectively seals against the valve seat. A bobbin integral with the housing has a solenoid bore adjacent to and coaxial with the valve bore. A moveable armature resides in the solenoid bore and has an operating rod connected to the plunger. A pole piece resides in the solenoid bore adjacent the armature. A solenoid coil is wound about the bobbin. A flux conductor partially surrounding the bobbin, pole piece, and armature. An assembly method includes flowing air through the port, inserting the plunger or another sealing element into the bore while monitoring the fluid flow; and stopping the plunger or sealing element when the flow is at a preselected condition. | 12-31-2009 |
