Patent Publication Number: US-6699012-B1

Title: Pressure-increasing device driven by liquid

Description:
BACKGROUND OF THE INVENTION 
     This invention relates to a pressure-increasing device driven by liquid, particularly to one provided with a plurality of extension wings preset in number around the periphery of the plate body of a drive unit for holding and pushing upward flowing water to increase pressure so that water may flow easily outward. 
     Generally, a sinking pump is employed to pump the water of an aquarium into a filtering tank for filtering impurities therein, or a water-pumping motor is used to pump water into the water-reserving tank on the top of a high building. The operating principle of either the sinking pump or the water-pumping motor is to employ a motor and a blade or a gear to push water outward by means of a centrifugal force to enable water to produce a pressure-increasing force and be easily pushed upward to a high level for use. 
     However, the conventional centrifugal blades are simply structured so they can hardly produce a great pressure-increasing force. In this case, the horsepower of a motor has to be increased in order to pump water from a low level to a high level through a long distance, thus increasing cost, making great noise and taking a large space. 
     SUMMARY OF THE INVENTION 
     The objective of the invention is to offer a pressure-increasing device driven by liquid, provided with a plurality of extension wings preset in number at proper positions of the outer ends of the centrifugal blades on the plate body of a drive unit. The extension wings respectively extend to the preset location in the middle of the water passage of a body for holding and pushing upward the water thereon to produce a powerful pressure-increasing force for forcefully pushing the water outward by a driving force produced by rotation of the extension wings. 
     Another objective of the invention is to offer a pressure-increasing device driven by liquid, in which the housing and the inner tube of a body, and the plural ribs as well as the communicating water passage between the housing and the inner tube are all formed integral, able to reinforce its structure and lower producing cost. 
    
    
     BRIEF DESCRIPTION OF DRAWINGS 
     This invention will be better understood by referring to the accompanying drawings, wherein: 
     FIG. 1 is an exploded perspective view of a pressure-increasing device driven by liquid in the present invention: 
     FIG. 2 is a cross-sectional view of the pressure-increasing device driven by liquid, illustrating a condition of water flowing there in the present invention: 
     FIG. 3 is a rear perspective view of the pressure-increasing device driven by liquid in the present invention: 
     FIG. 4 is a perspective view of a drive unit in the invention: 
     FIG. 5 is a rear perspective view of the drive unit in the present invention: and 
     FIG. 6 is a cross-sectional view of the extension wings holding and pushing upward the water thereon in the present invention. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     A preferred embodiment of a pressure-increasing device driven by liquid in the present invention, as shown in FIGS. 1 and 2, includes a power unit  10 , a body  20 , a drive unit  30  and a bottom base  40  as main components combined together. 
     The power unit  10  is a motor in this preferred embodiment, having a spindle  11  extending outward from the lower end. 
     The body  20  has its housing  21  fitted inside with a concentric inner tube  22 . The housing  21  and the inner tube  22  are connected together by means of three ribs  23 , having an up-and-down through water passage  24  formed between the housing  21  and the inner tube  22 . The housing  21 , the inner  22  and the three ribs  23  are all formed integral. Further, each rib  23  is provided with an arcuate recess  231  in the bottom, as shown in FIG.  3 . The inner tube  22  has a hollow interior for receiving the power unit  10 , which has its spindle inserted out of the through hole  222  of the bottom plate  221  of the inner tube  22  and fitted around with a gasket  223 . The electric wire  224  of the power unit  10  is inserted through the inner tube  22  and one of the ribs  23  and protrudes out of the housing  21 . The inner tube  22  has its upper end provided with female threads  225  to be screwed together with the male threads  261  at the bottom end of an upper cover  26  for closing up the power unit  10 , with the upper cover  26  having a cone-shaped upper portion. Besides, the housing  21  has its upper end formed with male threads  212  to be screwed together with a fit member  27 , which is a tapered conical body having a hollow interior and has a water-exhausting pipe  271  at the front end. A conical water-exhausting passage  28  is formed between the inner surface of the fit member  27  and the outer surface of the upper cover  26  with a preset interval. Further, the body  20  has its bottom end formed with male threads  213 . 
     The drive unit  30  is positioned at the bottom of the body  20  and connected axially with the spindle  11  of the power unit  10 . The drive unit  30  has a plate body  31  provided thereon with a plurality of centrifugal blades  32 . The plate body  31  has a plurality of extension wings  33  respectively disposed at the outer end and in the extending direction of each centrifugal blade  32 , as shown in FIGS. 4 and 5, and each extension wing  33  extends outward to reach a location outside the middle of the water passage  24  of the body  20 , as shown in FIG.  2 . The plate body  31  further has a plurality of recessed guide grooves  34  respectively provided between every two blades  32  and extending outward and gradually growing wider and deeper, as shown in FIG.  4 . Then, each guide groove  34  is provided at the outer end with a water-guiding notch  35  adjacent to the end of the extension wing  33 . In addition, each extension wing  33  has its rear side formed with a slanting surface  36  gradually growing thicker toward the end, as shown in FIG.  5 . 
     The bottom base  40  has its upper end formed with female threads  41  to be screwed together with the male threads  213  at the bottom of the body  20  and is provided with a central hollow  42  in the center for receiving the drive unit  30  therein. The center hollow  42  is bored at the bottom with a through hole  43  communicating with plural water-sucking holes  44  bored around the periphery of the bottom of the bottom base  40 . 
     In using, as shown in FIG. 2, water is sucked in through the water-sucking holes  44  of the bottom base  40  to flow to the drive unit  30  via the through hole  43 . Then, the water is pressed by the centrifugal blades  32  of the drive unit  30  to push and rotate the peripheral positions of the extending wings  33 , which simultaneously push the water to flow upward along the up-and-down water through passage  24  of the body  20 . After water is guided and gathered together by the conical water-exhausting passage  28  between the fit member  27  and the upper cover  26 , it is forced to flow out of the water-exhausting, pipe  271  at the front end of the fit member  27 . 
     Specifically, the plate body  31  of the drive unit  30  has the plurality of extension wings  33  respectively disposed at the outer end and in the extending direction of each centrifugal blade  32 . Each extension wing  33  extends outward to reach a position outside the middle of the water passage  24  of the body  20 , as shown in FIGS. 2 and 6, so as to let the extension wings  33  able to hold up the water in the water passage  24  to overcome the force of gravity. Meanwhile, water is pushed upward by the extension wings  33  and produces a powerful pressure-increasing force by a driving force produced by the rotation of the slanting surfaces  36  on the rear side of the extension wings  33 . 
     The plate body  31  of the drive unit  30  has its surface provided with the plurality of recessed guide grooves  34  respectively positioned between every two centrifugal blades  32  to extend outward and gradually growing broader and deeper. These guide grooves  34  help to guide water to flow in definite directions to increase the amount and smoothness of water flowing, and the water guiding notches  35  respectively formed at the outer end of each guide groove  34  and positioned near the extension wings  33 ,  34  also help the water to flow upward to be pushed forward by the extension wing  33 . In short, each component in this invention is designed to conform to the characteristic of liquid flowing to let flowing water pushed forward orderly and smoothly. 
     Moreover, the housing  21 , the inner tube  22 , the three ribs  23  between the housing  21  and the inner tube  22 , and the up-and-down-through water passage  24  of the body  20  are all formed integral, able to reinforce structure, diminish size and lower producing cost. Besides, the arcuate recess  231  provided in the bottom of the ribs  23  and positioned near the extension wings  33  are able to receive rotating water and then separately guide it to flow into the water passage  24  smoothly. 
     Further, the conical water-exhausting passage  28  formed between the fit member  27  and the upper cover  26  gathers the flowing-up water to reach the water-exhausting pipe  271  at the front end of the fit member  27  and then presses the water therein by its conical structure to increase a force of water exhausting. 
     The pressure-increasing device driven by liquid in the present invention may serve as a pump to be applied to an aquarium or a pool, and with its characteristic of water entering and water exhausting in a same direction, such a pressure-increasing device may also serve as a propeller to be applied to a boat or a float. 
     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.