Patent Publication Number: US-7217307-B2

Title: Dust collector with an invertible wind exhausting case

Description:
BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   This invention relates to a dust collector, particularly to one provided with an invertible wind exhausting case so as to let the position of a fan motor and a sucking tube case fixed respectively on and under the wind exhausting base turned upside down quite easily and quickly. 
   2. Description of the Prior Art 
   Conventional medium-sized and large-sized dust collectors  10  shown in  FIG. 1  generally includes a wind exhausting case  11 , and a platform truck  12  for mounting the wind exhausting case  11  thereon. The wind exhausting case  11  has a fan motor  111  and sucking tube base  112  and plural dust bags  113  on the upper and the lower portion of its two sides. When the fan motor  111  is started to operate, it produces vacuum sucking force in the interior of the wind exhausting case  11  for sucking in dust through the sucking tube base  112  and then the dust is blown and collected in the dust bags  113 . Further, the platform truck  12  consists of a platform  121 , and four upright tubes  122  positioned at four corners of the platform  121  and having their upper ends respectively fixed firmly with two side walls of the wind exhausting base  11 , which is thus mounted securely on the platform  121  of the platform truck  12 . 
   However, the fan motor  111  and the sucking tube base  112  respectively positioned under and on the wind exhausting case  11  often have to be inverted to cope with different sucking conditions. But these two components  111  and  112  are usually fixed tightly with not a few bolts and screws, so it requires quite a lot of time and work to screw loose those bolts and screws for inverting the two components  111  and  112 . In addition, after inverting them, the bolts and screws have to be once again screwed tight, causing the inverting process very troublesome. Moreover, in repeating inverting work, improper screwing of the bolts and screws may also give rise to bad effect to dust sucking action. 
   SUMMARY OF THE INVENTION 
   This invention has been devised to offer a dust collector with an invertible wind exhausting case, which consists of an upper cover and a lower cover overlapped each other vertically, The upper and the lower cover are provided respectively with a circumferential wall, which is provided with two threaded holes of the same size, so the lower cover are combined threadably with upper horizontal tubes of the two sides of the platform truck with seal bolts, and the threaded holes of the upper cover are screwed with seal bolts. 
   When a user wants to invert the normal positions of the fan motor and the sucking tube base, the fan motor and the sucking tube base are net necessary to be taken off the wind exhausting case, but the wind exhausting case is possible to be wholly taken off the platform truck together with the fan motor and the sucking tube base and then inverted and fixed in the inverted position with more easiness and fastness than the conventional one. Thus the inverting work of the fan motor and the sucking tube base is simplified in a large extent, upgrading largely handling efficiency, in addition to avoiding improper dust sucking effect of the sucking tube. 

   
     BRIEF DESCRIPTION OF DRAWINGS 
     This invention will be better understood by referring to the accompanying drawings, wherein: 
       FIG. 1  is a perspective view of a conventional dust collector; 
       FIG. 2  is a partial exploded perspective view of a dust collector in the present invention; 
       FIG. 3  is an exploded perspective view of a wind exhausting case and the related portion of a platform truck in the present invention; and, 
       FIG. 4  is a side view of the dust collector with the wind exhausting case inverted from the normal position in the present invention. 
   

   DETAILED DESCRIPTION OF THE PREFERED EMBODIEMNT 
   A preferred embodiment of a dust collector with an invertible wind exhausting case in the present invention, as shown in  FIGS. 2 and 3 , includes a platform truck  20  and a wind exhausting case  30  and plural dust bags  40 . 
   The platform truck  20  consists of a bottom frame  21 , a platform  211  and two side upper frames  22  and four upright tubes  121  extending upright on four corners of the platform  211 . The two side upper frames  22  of an inverted U-shape respectively have two side vertical rods  221  to insert in the upright tubes  121  and securing the side upper frames  22  in place. The side upper frames  22  also respectively have a horizontal upper tube  222  between the two side rods  221  and an intermediate curved section. 
   The wind exhausting case  30  consists of an upper and a lower cover  31  overlapping each other vertically, the upper cover  31  has its upper intermediate surface mounted with the sucking tube base  32 , and the lower intermediate surface mounted with the fan motor  33 . Further, the upper and the lower cover  31  have two lateral sides of the upper surface respectively fixed with a ring base  34  for attaching a dust bag  35 . The two lateral sidewalls of the lower cover just contact and are connected with the curved sections of the two upper horizontal tubes  222 . 
   Further, the upper horizontal tubes  222  of the two side upper frames  22  of the platform truck  20  are respectively provided with two holes  223  spaced apart for seal bolts  224  to screw with. 
   The upper and the lower covers  31  of the wind exhausting case  30  further have two threaded holes  311  of the same size in two lateral sides, and the two threaded holes  311  of the lower cover  31  are screwed with the seal bolts  224  so as to fix firmly the wind exhausting case  30  with the platform truck  20 . The two threaded holes  311  of the upper cover  31  are screwed sealingly by two seal bolts  312 . 
   Next, the function of the dust collector is to be described. As shown in  FIGS. 3 and 4 , in inverting the fan motor  33  and the sucking tube base  32 , the seal bolts  224  of the two upper horizontal tubes  222  of the platform truck  20  and the seal bolts  312  of the upper cover  31  are loosened off to permit the wind exhausting case  30  taken off and inverted upside down. Then the seal bolts  224  are made to engage the threaded holes  311  and the holes  223 , with the seal bolts  312  screwing with the threaded holes  311  of the upper cover  31 , fixing the inverted wind exhausting case  30  with the platform truck  20  once again with easiness and fastness, resulting in inverting of the fan motor  33  and the sucking tube base  32 . 
   Lastly, the dust collector with an invertible wind exhausting case according to the invention has the following advantages. 
   1. The wind exhausting case  30  can be inverted by screwing loose and tight the bolts  224  and  312 , much more convenient to handle than the conventional dust collector. 
   2. The fan motor  33  and the sucking tube base  32  are not necessary to be taken off and assembled with the wind exhausting case by inverting the wind exhausting case for directly inverting the position of the fan motor  33  and the sucking tube base  32  at the same time, avoiding the potential improper screwing work of the bolts and screws to affect dust collecting function. 
   While the preferred embodiment of the invention has been described above, it will be recognized and understood that various modifications may be made therein and the appended claims are intended to cover all such modifications that may fall within the spirit and scope of the invention.