Patent Publication Number: US-2006011656-A1

Title: Liquid extruding device

Description:
BACKGROUND OF THE INVENTION  
      (a) Technical Field of the Invention  
      The present invention relates to a liquid extruding device, particularly to one wherein rotation of an extruding stick inside of the soft washer would result in gaps which exchange position in one direction to form an effect of extruding and driving liquid.  
      (b) Description of the Prior Art  
      As disclosed in R.O.C. Patent Approval No. 527905 entitled “Automatic liquid dispensing mechanism”, the mechanism functions to make the liquid enter from one end and flow out from the other end, ad comprises a planet device, a hose and a housing. Wherein the planet device provided on the bottom of the housing includes a rotating plate, from the surface of which a number of axles are extruded, and each axle is sheathed by a roller; the hose, being a transmitting carrier, is in the form of an arc provided in-between the inner rim of the housing and the outer surface of the rollers; extrusions are provided on the hose and engaged in the opposite grooves of the housing; the outer surface of each roller contacted with the axis of the motor is driven to rotate by the motor; and the plate of the planet device pushes the hose circularly, thereby transmitting the liquid.  
      Considering that the above structure requires numerous components which requires time and cost in assembly, the inventor motivated the intention to research and disclose the invention as claimed, which, being a rather simplified design, is easily produced and cost economic.  
     SUMMARY OF THE INVETION  
      The primary object of the invention is to provide a liquid extruding device, wherein rotation of an extruding stick inside of the soft washer would result in gaps which exchange position in one direction to achieve an effect of extruding and driving liquid.  
      To obtain the objects, the invention comprises a base, which has a hollow portion; a soft washer, which is provided inside of the hollow portion of the base; and an extruding stick provided inside of soft washer. The hollow portion of the base is provided with positioning grooves around the wall, an inlet end at one side going through the hollow portion, and an outlet at the bottom going through the hollow portion. The soft washer is surrounded by positioning ribs corresponding to the positioning grooves, and interiorly provided with a hole having a threaded surface and going through the inlet and outlet ends. One end of the extruding stick has a non-circle central post, interferentially cooperating with the hole, for inserting into the hole of the soft washer, while the other end of the extruding stick has an engaging hole for connectedly receiving the axis of the motor.  
      Accordingly, rotation of the central post of the extruding stick inside the hole of the soft washer will result in gaps which exchange position with one another and move in one direction to match up the gyroidal groove of the hole, thereby forming a pump effect to drive liquid.  
      The foregoing object and summary provide only a brief introduction to the present invention. To fully appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings. Throughout the specification and drawings identical reference numerals refer to identical or similar parts.  
      Many other advantages and features of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example.  
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       FIG. 1  is a perspective view of the present invention.  
       FIG. 2  is an exploded view of the present invention.  
       FIG. 3  is a cross-sectional view of the invention after being assembled.  
       FIG. 4  is a cross-sectional view of the invention in use.  
       FIG. 5  is a cut-away view of the soft washer of the invention.  
       FIG. 6  shows the gyroidal groove of the hole of the soft washer.  
       FIG. 7  is a perspective view of the extruding stick of the invention.  
       FIG. 8  is a cross-sectional view of the extruding stick.  
       FIG. 9  is a cut-away view of the central post of the invention.  
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
      The following descriptions are of exemplary embodiments only, and are not intended to limit the scope, applicability or configuration of the invention in any way. Rather, the following description provides a convenient illustration for implementing exemplary embodiments of the invention. Various changes to the described embodiments may be made in the function and arrangement of the elements described without departing from the scope of the invention as set forth in the appended claims.  
      Referring to FIGS.  1  to  9 , the invention relates to a liquid extruding device, which is composed of a base  10 , a soft washer  20 , an extruding stick  30  and a motor  40 . Gaps would occur when the oval central post  31  of the extruding stick  30  rotates inside the hole  21  of the soft washer  20 . By way of the engagement of the oval central post  31  with the gyroidal groove  22  of the hole  21 , gyroidal narrow gaps would form between the central post  31  and the gyroidal groove  22 , the oval cross-section of which appear a gryoidal distribution. Besides, the periphery of the oval central post  31  is greater than the diameter of the hole  21  of the soft washer  20  such that the tolerance of the preferred interferential cooperation is 0.2 mm. While excessive interferential cooperation would run down the axis power of the motor  40 , small interferential cooperation would require the bias of the axis of the motor  40  be controlled extremely precise, and subsequently the process and assembly should be precisely. As such, it is important to determine an appropriate interferential cooperation degree. Accordingly, the soft washer  20  is served as a sustainer, the oval central post  31  is served as a rotator, such that as the non-circle post rotates, the gyroidal gap on the hole wall can generate a extruding effect due to the change of the space, thereby the liquid exists in the gap would move and exchange position to form a pump-like effect to drive the liquid.  
      Referring to  FIG. 2 , the base  10  has a hollow portion  12  which is provided with positioning grooves  11  around the wall. The base  10  is provided with an inlet end  13  at one side going through the hollow portion  12 , an outlet  14  at the bottom going through the hollow portion, and retaining holes  15  at the other end. Inside of the hollow portion  12  of the base  10  is provided with a soft washer  20  which is peripherally provided with positioning ribs  23  corresponding to the positioning grooves  11 , thereby the soft washer  20  can be positioned in the hollow portion  12  of the base  10 . The positioning grooves  11  provided on the wall of the hollow portion  12  share a circle with the corresponding positioning ribs  23  provided around the soft washer  20 , such that the force generated by the firm engagement thereof can be evenly born. Meanwhile, the positioning grooves  11  and the positioning ribs  23  are replaceable by matching non-smooth walls. Inside the soft washer  20  is provided with a hole  21 , which has an oval cross-section, goes through the inlet end  13  and outlet end  14 , and interiorly provided with a gyroidal groove  22  (as shown in  FIGS. 5 and 6 ).  
      Referring to  FIGS. 7 and 9 , the extruding stick  30  is provided at one side a central post  31 , which has an oval cross-section (as shown in  FIG. 9 ) and can be inserted into the hole  21  of the soft washer  20 . The outer diameter of the central post  31  of the extruding stick  30  is greater than the diameter of the hole  21  of the soft washer  20 . The preferred tolerance of their interferential cooperation is 0.2 mm, such that the central post  31  and the hole  21  can interferentially cooperate with each other. The other side of the extruding stick  30  is provided with a engaging hole  32  for connectedly receiving the axis  41  of the motor  40 .  
      Further referring to  FIGS. 2 and 3 , between the extruding stick  30  and the motor  40  is provided with a spacer  34 , which is provided with screw holes  35  corresponding to the retaining holes  15  on the base  10 . By way of screws  80 , the spacer  34  can be fastened to one end of the base  10 . An O-ring  33  is further provided between the spacer  34  and the extruding stick  30 . Accordingly, a novel liquid extruding device is accomplished.  
      As shown in  FIGS. 3 and 4 , when the motor  40  drives its axis  41  to rotate, the extruding stick  30  would be driven as well, subsequently the central post  31  having an oval cross-section would rotate. As the central post  31  rotates, the soft wash  20  would stay still since it is held in the hollow portion  12  of the base  10 . Therefore, the central post  31  of the extruding stick  30  would rotate inside the hole  21  of the soft washer  20  and generate gaps. Rotation of the central post  31  inside of the soft washer  20  would result in gaps on the gyroidal groove  22 ; the gaps exchange position in one direction to form an effect of extruding and driving liquid, thereby the liquid will flow in the inlet end  13  and out the outlet end  14 .  
      Concluded above, the liquid extruding device according to the invention can efficiently improve the disadvantages existing the prior art. Rotation of the central post  31  inside of the soft washer  20  would result in gaps on the gyroidal groove  22 ; the gaps exchange position in one direction to form an effect of extruding and driving liquid.  
      It will be understood that each of the elements described above, or two or more together may also find a useful application in other types of methods differing from the type described above.  
      While certain novel features of this invention have been shown and described and are pointed out in the annexed claim, it is not intended to be limited to the details above, since it will be understood that various omissions, modifications, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing in any way from the spirit of the present invention.