Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
BUILT-IN MOTOR TYPE PUMP DEVICE
Document Type and Number:
Japanese Patent JP2604077
Kind Code:
B
Abstract:

PURPOSE: To reduce noise generated in the vicinity of slit portions of a commutator during operations of a built-in motor type pump device.
CONSTITUTION: A pump unit and a DC motor are enclosed in a casing 1. A gap space 31 is provided between a brush holder 4 provided on one end of the casing 1 and a terminal holder 5 covering the brush holder 4 as a silencing chamber. The gap space 31 is connected to the inner space of the casing 1 through a penetrating hole 32. Thereby fluid intercepting sound generated in the vicinity of slit portions 20 of a commutator 18 of the DC motor can be absorbed in the gap space 31 to reduce noise generated from the whole pump device.


Inventors:
Arai, Hideo
Kikuchi, Taizo
Nakamura, Koji
Application Number:
JP1991000277044
Publication Date:
January 29, 1997
Filing Date:
September 27, 1991
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
HONDA MOTOR CO LTD
International Classes:
F02M37/08; F04D5/00; F04D13/08; (IPC1-7): F04D5/00; F02M37/08; F04D13/08