Pump device

Patent metadata

Field	Value
Publication number	US-9926929-B2
Application number	US-201314761160-A
Country	US
Kind code	B2
Filing date	Dec 10, 2013
Priority date	Jan 15, 2013
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

A pump device, a main body, a cover body, a stator module at least a portion of the external of the stator module being covered with an insulation member, a securing part to secure the pump main body to the cover body, a load applying means provided between the securing part and the cover body so as to apply a load to the securing part and the cover body, a connector terminal electrically coupled to an external-connected terminal which is externally grounded, and a conductive-elastic member electrically coupled to the connector terminal and configured to make contact with the cover body as applying a load to the cover body. A discharge path is formed through the pump main body, the securing part, the load applying means, the cover body, the conductive-elastic member, and the connector terminal to discharge static electricity to the external via the external-connected terminal.

First claim

The invention claimed is:

1. A pump device configured to suction and eject fluid by a cyclic-motion part driven by an electric motor to perform a cyclic motion, the pump device comprising:
a pump main body containing the cyclic-motion part, at least a portion of the pump main body being formed of a conductive material;
a cover body at least a portion of which is formed of a conductive material;
a stator module including a stator constituting the electric motor, at least a portion of an external shape of the stator module being covered with an insulation member having electric-insulating property to electrically insulate the pump main body from the cover body;
a securing part inserted through the stator to secure the stator module to the pump main body, at least a portion of the securing part being formed of a conductive material;
a coil spring provided between the securing part and the cover body so as to apply a load to the securing part and the cover body, at least a portion of the coil spring being formed of a conductive material;
a connector terminal electrically coupled to an external-connected terminal which is externally grounded, at least a portion of the connector terminal being formed of a conductive material; and
a conductive-elastic member electrically coupled to the connector terminal and configured to make contact with the cover body as applying a load to the cover body, at least a portion of the conductive-elastic member being formed of a conductive material, a discharge path being formed through the pump main body, the securing part, the coil spring, the cover body, the conductive-elastic member, and the connector terminal to discharge static electricity to an external side of the pump device via the external-connected terminal.

2. The pump device according to claim 1 , wherein
the cover body is provided with a fit-in portion configured to fit into the coil spring.

3. The pump device according to claim 1 , wherein
the stator includes a stator core, and the stator core is provided with a through hole extending along a direction from the pump main body to the cover body, the securing part being disposed in the through hole.

4. The pump device according to claim 1 , wherein
the conductive-elastic member is a leaf spring member formed by bending a metal member and electrically coupled to the connector terminal.

5. The pump device according to claim 2 , wherein
the stator includes a stator core, and the stator core is provided with a through hole extending along a direction from the pump main body to the cover body, the securing part being disposed in the through hole.

6. The pump device according to claim 2 , wherein
the conductive-elastic member is a leaf spring member formed by bending a metal member and electrically coupled to the connector terminal.

7. The pump device according to claim 3 , wherein
the conductive-elastic member is a leaf spring member formed by bending a metal member and electrically coupled to the connector terminal.

Assignees

• Mikuni Kogyo Kk

Inventors

• Takahashi Jun

Classifications

• H02K3/522

  for generally annular cores with salient poles · CPC title

• F04C2/102

  the two members rotating simultaneously around their respective axes · CPC title

• F04B53/16

  Casings; Cylinders; Cylinder liners or heads; Fluid connections · CPC title

• F04C15/008

  Prime movers · CPC title

• F04D13/0693

  Details or arrangements of the wiring · CPC title