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1. US6379129 - Blower

Office
United States of America
Application Number 09668304
Application Date 25.09.2000
Publication Number 6379129
Publication Date 30.04.2002
Grant Number 6379129
Grant Date 30.04.2002
Publication Kind B1
IPC
F04B 35/04
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
35Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
04the means being electric
F04B 17/00
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
17Pumps characterised by combination with, or adaptation to, specific driving engines or motors
F04D 29/056
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
DNON-POSITIVE-DISPLACEMENT PUMPS
29Details, component parts, or accessories
05Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
056Bearings
F04D 25/02
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
DNON-POSITIVE-DISPLACEMENT PUMPS
25Pumping installations or systems specially adapted for elastic fluids
02Units comprising pumps and their driving means
F04D 25/08
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
DNON-POSITIVE-DISPLACEMENT PUMPS
25Pumping installations or systems specially adapted for elastic fluids
02Units comprising pumps and their driving means
08the working fluid being air, e.g. for ventilation
F04D 29/04
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
DNON-POSITIVE-DISPLACEMENT PUMPS
29Details, component parts, or accessories
04Shafts or bearings, or assemblies thereof
CPC
F04D 29/0563
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
DNON-POSITIVE-DISPLACEMENT PUMPS
29Details, component parts, or accessories
05Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
056Bearings
0563Bearings cartridges
F04D 29/059
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
DNON-POSITIVE-DISPLACEMENT PUMPS
29Details, component parts, or accessories
05Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
056Bearings
059Roller bearings
Applicants Minebea Kabushiki-Kaisha
Inventors Obara, Rikuro
Agents Gopstein, Israel
Priority Data 2000070058 14.03.2000 JP
Title
(EN) Blower
Abstract
(EN)

A blower includes a durable and quiet bearing structure which eliminates or reduces rotational run out, and a bearing wherein the number of essential components and cost for manufacturing is reduced, and the diameter of the shaft can be increased. The blower has an impeller adapted to be rotated upon energizing the blower. The blower has a bearing apparatus which supports the rotational center portion of the impeller, in which the bearing apparatus has a sleeve, and a stepped shaft including a larger diameter portion and a reduced diameter portion provided at one end thereof. A first rolling contact groove is formed at an appropriate position on the outer peripheral surface of the larger diameter portion. A second rolling contact groove is formed on an inner peripheral surface of the sleeve so as to correspond with the first rolling contact groove. Balls of a first row are interposed between the first and second grooves, and an inner race fits over the reduced diameter portion and is secured thereto with an appropriate preloading force. A third rolling contact groove is formed around an outer peripheral surface of the inner race. A fourth rolling contact groove is formed on the inner peripheral surface of the sleeve so as to correspond with the third rolling contact groove. Balls of a second row are interposed between the third and forth grooves.

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