Device for protecting motor in vacuum cleaner

• US 20030070254A1
• Filed: 11/21/2001
• Published: 04/17/2003
• Est. Priority Date: 10/15/2001
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Ji, Heon Pyeong
• Granted Patent: US 6,651,294 B2
• Time in Patent Office: Days
• US Class Current: 15/412
• CPC Class Codes: A47L 9/19 Means for monitoring filtering operation
• CPC Class Codes: A47L 9/22 Mountings for motor fan assemblies
• CPC Class Codes: A47L 9/2821 Pressure, vacuum level or airflow
• CPC Class Codes: A47L 9/2889 Safety or protection devices or systems, e.g. for prevention of motor over-heating or for protection of the user

Abstract

The present invention relates to a device for protecting a motor in a vacuum cleaner. The device for protecting the motor in the vacuum cleaner according to the present invention comprises a lower casing 170 for forming a lower portion of a main body of the cleaner; a motor housing 160 which is installed in the lower casing and includes the driving motor 150 therein and of which an upper portion is opened upwardly; a filtering means installed onto the lower casing for filtering out foreign materials from introduced air; and an intermediate cover integrally formed with a first cover portion 122 positioned onto an upper portion of the filtering means and a second cover portion 124 for covering the upper portion of the motor housing. Further, a pressure switch for sensing pressure within the motor housing and a damper for introducing external air into the motor housing when the pressure within the motor housing is lowered below a predetermined pressure value, are directly installed onto the second cover portion of the intermediate cover.

Claims

1. A device for protecting a motor in a vacuum cleaner, comprising:

a lower casing for forming a lower portion of a main body of the cleaner;

a motor housing which is installed in the lower casing and includes the driving motor therein and of which an upper portion is opened upwardly;

a filtering means installed onto the lower casing for filtering out foreign materials from introduced air; and

an intermediate cover integrally formed with a first cover portion positioned onto an upper portion of the filtering means and a second cover portion for covering the upper portion of the motor housing,

wherein a pressure switch for sensing pressure within the motor housing is directly installed onto the second cover portion of the intermediate cover.

2. The device as claimed in claim 1, wherein a damper for introducing external air into the motor housing when the pressure within the motor housing is lowered below a predetermined pressure value, is further installed onto the second cover portion of the intermediate cover.