VACUUM CLEANER

• US 3,653,189 A
• Filed: 01/20/1970
• Issued: 04/04/1972
• Est. Priority Date: 01/20/1969
• Status: Expired due to Term

• Current Assignee: Hideo Kashihara, Kazuyoshi Takahashi, Takamitu Yamamoto, Yuji Miyake, Ziyun Mizukawa
• Original Assignee: Hideo Kashihara, Kazuyoshi Takahashi, Takamitu Yamamoto, Yuji Miyake, Ziyun Mizukawa
• Inventors: Yamamoto, Takamitu, Mizukawa, Ziyun, Miyake, Yuji, Kashihara, Hideo, Takahashi, Kazuyoshi
• Primary Examiner(s): Talbert, Jr., Dennis E.
• Assistant Examiner(s): Gifford, Vincent H.
• Application Number:
  US05/004,328
• Time in Patent Office: 805 Days
• Field of Search: 55/366-367,378-380,369,282-283,288-289,291-293,295,299-301,304-305,429,16.3 15/327A-327E,327R,347,349,352 210/315
• US Class Current: 55/288
• CPC Class Codes: A47L 9/125 funnel-shaped
• CPC Class Codes: A47L 9/20 Means for cleaning filters
• CPC Class Codes: Y10S 55/03 Vacuum cleaner

Abstract

In a vacuum cleaner comprising a housing including a motor fan unit and a dust collecting case detachably connected to the housing, the dust collecting case is provided at its outlet opening with a two-stage filtering means comprising a conical filter screen of relatively large meshes and a cloth main filter which extend toward the inside of the dust collecting case in such a spaced relationship that the outlet opening is covered in double.

Claims

1. A vacuum cleaner comprising a housing including a motor fan unit, a dust collecting case detachably connected to said housing and cooperating with said housing and said motor fan unit to form a suction system, said dust collecting case being formed with an inlet opening and an outlet opening, a filter unit, said filter unit including pre-filtering means, main filtering means and a dust removing device, said pre-filtering means including a generally conically shaped screen having relatively large meshes which extends into the inside of said dust collecting case, closure means movable with respect to the apex of the screen for normally closing the apex end of the screen, said main filtering means including a cloth filter within said screen and disposed in a spaced relationship therewith to form a fine dust particle collecting space therebetween, means for detachably mounting said filter unit to cover said outlet opening and to have air with dust and dirt particles entrained therein impinge upon said filter unit, and said dust removing device comprising manually operable means for aiding in the removal of dust from said main filtering means, said manually operable means being in contact with said main filtering means and being manually operable when the dust collecting case is detached from said housing and said pre-filtering and main filtering means are still part of said filter unit.

2. A vacuum cleaner according to claim 1, wherein said cloth filter has an apex portion which is concentrically waved and said dust removing device is a vibrator mounted as part of said filter unit to contact said apex portion of said cloth filter.

3. A vacuum cleaner according to claim 1, further comprising a support frame located within said filter screen for maintaining said cloth filter in substantially conical form, said cloth filter being attached to said support frame and said frame being removable from within said filter screen with the cloth filter attached thereto to serve as said meAns for aiding in the removal of dust from said cloth filter.

4. A vacuum cleaner according to claim 3 wherein said closure means for closing the opening at the apex end of said filter screen comprises a detachable plug to which said frame and said cloth filter means are also attached, removal of the plug permitting the frame and cloth filter to be withdrawn from within the filter screen so that the dust can be removed from said cloth filter and pass into the dust case through the open apex end of the filter which is detachably mounted to screen.

5. A vacuum cleaner as in claim 4 further comprising means for detachably mounting the filter unit to the dust collecting case.

6. A vacuum cleaner according to claim 4 further comprising a handle rod attached to said plug to facilitate removal of the cloth filter which is detacably mounted to said filter screen apex said filter screen.

7. A vacuum cleaner as in claim 1 wherein said closure means for closing the apex end of the filter screen comprises a plug which is detachably mounted to said filter screen apex end and to which a portion of the cloth filter is also attached, said plug being removed to open the apex end of the filter screen when said means for aiding in the removal of dust from said cloth filter is operated.

8. A vacuum cleaner as in claim 7 further comprising a handle rod attached to said plug to facilitate the removal of the cloth filter from within said filter screen.

9. A vacuum cleaner according to claim 1 wherein the wall of said dust collecting case is formed with said closure means closing the open apex end of said filter screen, said closure means located on the wall of said dust collecting case facing said outlet opening so that said apex opening of said filter screen is closed when said filter unit is mounted over said outlet opening of said dust collecting case.

10. A vacuum cleaner according to claim 9, further comprising a support frame located within said filter screen for maintaining said cloth filter in substantially conical form, said cloth filter being attached to said support frame and said frame being removable from within said filter screen with the cloth filter attached thereto to serve as said means for aiding in the removal of dust from said cloth filter.