# US 8,464,392 B2 · Electric vacuum cleaner

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- Number: US 8,464,392 B2
- Document ID: US8464392B2
- Status: Granted
- Kind: B2
- Application number: 12/680,902
- Filed: 2008-11-25
- Published: 2010-09-02
- Granted: 2013-06-18
- Earliest claimed: 2007-11-28
- Assignees: Kabushiki Kaisha Toshiba; Toshiba Consumer Electronics Holdings Corporation; Toshiba Home Appliances Corporation
- Applicants: Tsuyoshi Sato; Masatoshi Tanaka; Yoshiyuki Iwata
- Inventors: Tsuyoshi Sato; Masatoshi Tanaka; Yoshiyuki Iwata
- Web page: https://patentgrep.com/patent/US8464392B2

## CPC

- A47L 9/22: Mountings for motor fan assemblies
- A47L 9/0081: {Means for exhaust-air diffusion; Means for sound or vibration damping}
- A47L: DOMESTIC WASHING OR CLEANING (brushes A46B; cleaning quantities of bottles or of other hollow articles of one kind B08B9/00; laundry D06F); SUCTION CLEANERS IN GENERAL (cleaning in general B08)

## Abstract

The present invention provides an electric vacuum cleaner which can reliably absorb vibration accompanying driving of an electric blowing part. An electric blowing part 11 which is driven to generate a negative pressure is housed in a main body case 5. An energizing means 29 which energizes the electric blowing part 11 from the front side toward the center of gravity G of the electric blowing part 11 in a side view, and an energizing means 30 which energizes the electric blowing part 11 from the rear side, are provided on the main body case 5. Vibration accompanying driving of the electric blowing part 11 can be reliably absorbed by energizing of springs of the energizing means 29 and 30, and vibration can be isolated from the main body case 5.

## Claims

### Claim 1

An electric vacuum cleaner comprising:
a main body case;
an electric blowing part housed in the main body case and configured to be driven to generate a negative pressure, the electric blowing part disposed in the main body so that a longitudinal axis of the electric blowing part is oriented in a front-to-rear direction of the main body; and
a pair of biasing structures provided on the main body case and positioned lower than a center of gravity of the electric blowing part, the pair of biasing structures being configured to apply a force to the electric blowing part diagonally upward toward the center of gravity of the electric blowing pair from a front side of the center of gravity and a rear side of the center of gravity.

### Claim 2 (depends on 1)

The electric vacuum cleaner according to claim 1, wherein the electric blowing part includes:
a fan positioned on the front side of the center of gravity; and
an electric motor configured to rotate the fan, the electric motor being positioned on the rear side of the center of gravity and
the biasing structures are configured to apply the force to the electric blowing part toward the side of the center of gravity from a fan side and an electric motor side.

### Claim 3 (depends on 1, 2)

The electric vacuum cleaner according to claim 1 or 2, wherein
the electric blowing part includes supporting portions having arced sectional shapes, and
each of the biasing structures includes:
a biasing structure main body configured to provide the force; and
a support disposed on a tip end of the biasing structure main body, the support having an arced sectional shape and configured to fit in one of the supporting portions.

### Claim 4 (depends on 1, 2)

The electric vacuum cleaner according to claim 1 or 2, further comprising:
a rotary member made from an elastic material and contacting the electric blowing part at a position higher than the center of gravity of the electric blowing part to support the electric blowing part.

### Claim 5 (depends on 1, 2)

The electric vacuum cleaner according to claim 1 or 2, wherein
the electric blowing part includes:
an electric blower;
a holding member which holds the electric blower; and
a blowing part biasing structure for elastically supporting the electric blower radially toward the center of gravity inside the holding member.

### Claim 6 (depends on 1, 2)

The electric vacuum cleaner according to claim 1 or 2, further comprising:
a dust collecting chamber disposed in the main body case; and
a sealing member having a cylindrical shape, and connected to either a main body case or the electric blowing part slidably in the circumferential direction to airtightly connect a negative pressure side of the electric blowing part to a dust collecting chamber.