Vacuum cleaner

• US 20030121120A1
• Filed: 08/19/2002
• Published: 07/03/2003
• Est. Priority Date: 12/28/2001
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Ji, Heon Pycong
• Granted Patent: US 6,928,690 B2
• Time in Patent Office: Days
• US Class Current: 15/327.2
• CPC Class Codes: A47L 5/362 of the horizontal type, e.g. canister or sledge type
• CPC Class Codes: A47L 5/367 Suction cleaners for fixing on staircases

Abstract

A vacuum cleaner is disclosed, which includes a main body formed of a fan motor generating a driving force therein, a fan, and a cyclone dust collector, a suction head connected to the main body and sucking in all kinds of impurity existing on a surface that is to be cleaned, a suction hose connected to the front portion of the main body and an extension tube connected to the suction head both installed between the main body and the suction head, a dust collecting chamber detachably fixed on a rear side of the main body and having a handle on an outer rear surface thereof, a lower holding part of the handle on the dust collecting chamber projecting beyond the lower circumference of the wheels and coming into contact with the surface of a lower step, when the front portion of the main body of the vacuum cleaner is fastened to the edge of an upper step, and a roller caster formed on both sides of the lower front portion of the main body allowing back-and-forth motions and rotations on a flat surface and fastening the vacuum cleaner to the edge of the upper steps, thereby preventing the main body of the vacuum cleaner from slipping down the stairway.

Claims

1. A vacuum cleaner comprising:

a main body formed of a fan motor generating a driving force therein, a fan, and a cyclone dust collector;

a suction head connected to the main body and sucking in all kinds of impurity existing on a surface that is to be cleaned;

a suction hose connected to the front portion of the main body and an extension tube connected to the suction head both installed between the main body and the suction head;

a dust collecting chamber detachably fixed on a rear side of the main body and having a handle on an outer rear surface thereof;

a lower holding part of the handle on the dust collecting chamber projecting beyond the wheels and coming into contact with the surface of a lower step, when the front portion of the main body of the vacuum cleaner is fastened to the edge of an upper step; and

a roller caster formed on both sides of the lower front portion of the main body allowing back-and-forth rolling motions and rotations on a flat surface and fastening the vacuum cleaner to the edge of the upper steps, thereby preventing the main body of the vacuum cleaner from slipping down the stairway.

2. The vacuum cleaner according to claim 1, wherein a lower holding part of a handle formed on the dust collecting chamber includes a ruffle preventing the main body from slipping.

3. The vacuum cleaner according to claim 2, wherein a profile of the ruffle is shaped as a repetition of triangles.

4. The vacuum cleaner according to claim 2 or claim 3, wherein an angle formed between the lower holding part of the handle, whereby the ruffle is formed, and an outer surface of the dust collecting chamber is set at a range of about 30°

to 60°

.

5. The vacuum cleaner according to claim 4, wherein the angle formed between the lower holding part of the handle, whereby the ruffle is formed, and the outer surface of the dust collecting chamber is set at 45°

.

6. The vacuum cleaner according to claim 1, wherein the handle formed on the dust collecting chamber includes,

left and right side walls both spaced apart to a set distance in a longitudinal direction;

a rear wall connecting each inner end of the left and right side walls, so that a cross-section of the handle forms a ‘

’

shape when cut in a direction perpendicular to the longitudinal direction; and

a plurality of ribs formed to project beyond the left and right side walls of the handle in order to strengthen the handle and to provide friction, which prevents the main body from slipping down the stairway.

7. The vacuum cleaner according to claim 6, wherein the ribs are formed on a lower holding part of the handle and are shaped to be horizontal to a flat surface when the main body is placed thereon.

8. The vacuum cleaner according to claim 6, wherein the handle includes a plurality of cavities for forming the ribs formed in a vertical direction, so as to allow a mold for forming the ribs to be easily removed from the cavities.

9. The vacuum cleaner according to claim 6, wherein a reinforcing rib is formed along a horizontal direction of the handle in an inner center of the rear wall on the handle, which is held by a user.

10. The vacuum cleaner according to claim 6, wherein the handle further includes a holding part formed from each end of the left and right side walls and the inside of the handle.

11. The vacuum cleaner according to claim 1 or claim 6, wherein a gap in a lower portion of the holding part on the handle becomes further apart as the gap nears a lower portion of the handle, which is connected to the dust collecting chamber.

12. The vacuum cleaner according to claim 1, wherein the handle on the dust collecting chamber is equipped with a separate member mounted thereon, which comes into contact with a surface of a step, when a front portion of the main body of the vacuum cleaner is fastened to the edge of a step, in order to provide friction.

13. The vacuum cleaner according to claim 1, wherein a plurality of irregular shapes is formed in a region behind each roller casters on the lower front portion of the main body, so as to allow a plurality of grooves of the irregular shapes fit an outline of a step, thereby increasing friction caused to prevent the main body of the vacuum cleaner from slipping.