Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Reexamination Certificate
2000-01-28
2001-02-27
Moore, Chris K. (Department: 1744)
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
C055S299000, C055S305000
Reexamination Certificate
active
06192550
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a dust-collecting device for a vacuum cleaner used in an upright type vacuum cleaner and to an upright type vacuum cleaner employing the same.
There are conventionally known vacuum cleaners, especially upright type vacuum cleaners which do not employ disposable dust-collecting paper packages but are provided with a dust-collecting device comprising a cylindrical filter within a dust-collecting case which is fitted to a suction path of a main body of the vacuum cleaner in a freely attachable and detachable manner to accumulate dust which has been filtered through the filter within the dust-collecting case wherein the accumulated dust can be discharged by opening a bottom lid. Such a dust-collecting device is economical than compared to disposable paper packages since it can be semi-permanently used by performing maintenance of the filter.
However, it is the case with such a conventional dust-collecting device for a vacuum cleaner that an increase in the amount of dust accumulated within the dust-collecting case results in compression of dust which is adhered to an inner wall of the dust-collecting case, so that dust cannot be discharged by its own weight through the discharge outlet by simply opening the bottom lid of the dust-collecting case. Thus, dust need to be scraped out by hand so that this procedure is quite annoying and also unhygienic.
Further, since dust (minute dust) which is adhering to the filter needs to be removed regularly by detaching the filter, this removal of adhering dust might be troublesome and in case such removing processes are neglected, plugging owing to dust adhering to the filter might occur so that dust-collecting efficiency is degraded.
It should be noted that a known type of dust-collecting device employing no paper package or filter which is apt to be plugged is a dust-collecting device of cyclone separating type wherein dust is simply accumulated in the dust-collecting case after separation in such a dust-collecting device of cyclone separating type to thereby present a poor dust compression rate so that the dust-collecting case is filled up with dust shortly.
The present invention has thus been made with the aim to solve such problems, and it is an object thereof to enable easy discharge of dust which has been compressed and accumulated in a dust-collecting case.
It is another object thereof to enable easy removal of dust which has adhered to a filter to thereby prevent degradation of dust-collecting efficiency owing to plugging.
It is still another object thereof to improve a compression rate of dust accumulated in the dust-collecting case and to achieve improvements in collecting amount with respect to dust-collecting capacity.
SUMMARY OF THE INVENTION
For achieving the above objects, the device of the present invention comprises a dust-collecting case which is fitted into a suction path extending from a suction nozzle to a motor fan in a freely attachable and detachable manner and from which accumulated dust can be discharged by opening a bottom lid of the dust-collecting case, and a cylindrical filter fitted into the dust-collecting case for filtering dust contained in air which is taken in into the dust-collecting case, wherein the filter is arranged to be rotatable, a spiral rib is formed at an outer periphery of the filter, and the device is equipped with a rotating means for rotating the filter.
Further, the device of the present invention comprises a dust-collecting case which is fitted into a suction path extending from a suction nozzle to a motor fan in a freely attachable and detachable manner and from which accumulated dust can be discharged by opening a bottom lid of the dust-collecting case, a cylindrical pre-filter fitted into the dust-collecting case for filtering coarse dust contained in air which is taken in into the dust-collecting case, and a cylindrical main filter fitted into the pre-filter for filtering minute dust contained in air which has been filtered by the pre-filter for eliminating coarse dust, wherein the pre-filter is arranged to be rotatable, a spiral rib is formed at an outer periphery of the pre-filter, and the device is equipped with a rotating means for rotating the pre-filter.
The pre-filter is characterized in that its filter portion is designed to be located in a lower portion in the dust-collecting case.
The pre-filter is characterized in that it is further provided with elastic protrusions which hit against the main filter through rotation thereof to make the main filter oscillate.
The rotating means is characterized in that it includes of a handle and a gear mechanism for connecting a rotating axis of the handle and an attaching plate for the pre-filter.
Alternatively, the rotating means is characterized in that it includes a slide lever and a gear mechanism which is connected to the slide lever in case the slide lever is slid in either direction for rotating the pre-filter in a specified direction.
The dust-collecting case is characterized in that it is provided with a grip, wherein a fulcrum for opening and closing the bottom lid is provided on a same side as that of the grip.
The dust-collecting case is characterized in that it is provided with a grip, wherein a fulcrum for opening and closing the bottom lid is provided on an opposing side as that of the grip.
Moreover, the present invention relates to an upright type vacuum cleaner with the above-described dust-collecting device for a vacuum cleaner being fitted to a main body of the upright type vacuum cleaner in a freely attachable and detachable manner, wherein the vacuum cleaner comprises a handle for operating the main body extending upward from a front surface side of the main body of the vacuum cleaner, the dust-collecting device is fitted to the front surface side of the main body of the vacuum cleaner in a freely attachable and detachable manner, and a grip of the dust-collecting device is formed to extend downward from the handle in a successive manner for operating the main body.
REFERENCES:
patent: 2594456 (1952-04-01), Kroenlein
patent: 3591888 (1971-07-01), Takeda et al.
patent: 3653189 (1972-04-01), Miyake et al.
patent: 3841067 (1974-10-01), Kato et al.
patent: 5562758 (1996-10-01), Awaji
Hamada Atsuo
Kamatani Kazumasa
Okuda Atsushi
Sakata Souji
Suetsugu Naoki
Moore Chris K.
Sanyo Electric Co,. Ltd.
Sughrue Mion Zinn Macpeak & Seas, PLLC
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