Abstract:
A hand truck having a folding platform attached to a wheeled base. The base having an arrangement of stabilizing bars and feet and vertically extensible masts that raise and lower the folding platform by operation of a motor attached to the base. The platform of the hand truck, when in the extended position, has modular removable railings attached along the perimeter of different platform sections. The platform is collapsible about pivot pins and suspended by chains attached to brackets atop the extensible masts.

Description:
FEDERALLY SPONSORED RESEARCH 
   No Applicable 
   SEQUENCE LISTING PROGRAM 
   No Applicable 
   BACKGROUND 
   1. Field of Invention 
   This invention relates to new and compact use-full improvements lifting hand truck 
   2. Prior Art 
   This invention is an improvement over all others lift hand trucks telescoping apparatus, every lifts are very heavy and difficult to get carried away to transport, the platform they are small is too difficulty to get carrying two or more persons and heavy apparatus or materials another disadvantage is the conventional cable winch drive that result an uneven progression of spiral as the cable is wound on the winch drum. This action results in cable pile-up and damage. 
   The present invention relates to a lifting apparatus capable of raising operator, helpers and materials all together at the same time to an elevate location, for assembling, construction, painting, repairing, maintaining, include hunting. 
   SUMMARY 
   The present invention is a lift truck utilizing plurality mast an very longer folding platform with an electrically operated and controlling from the platform. The longer folding platform have three sections, one in movable platform base, one in the from another in the back of movable platform base. The two sections of platform from and the back have three railing each. 
   Another object of the present invention is the safety at the moment when the railing is used, this is movable from the platform said platform have three railing, if the platform is close to the wall take out one railing close to the wall for better work. 
   Another railing is joined to the side railing for hinges, in the upper side to support to the movable platform base. 
   Another safety is in each vertical post and the movable platform base have a latch. 
   Another object of the present invention is which is that provide stability to attach rectangular tube in the base. 
   Another object to this invention is the light weight easy to transport. 
   Another object of the present invention is controlled by a driver situated on the platform lifting to handle to raise or to lower in any altitude which he like. 
   Another object of present invention is to make more compact at to take up two platform foldables in extreme opposite to main platform to stay vertically for what rotating in the pins or bolts what have in common said main platform and foldables platforms, said two foldables platforms to being joined in the upper with the mast and to tie and is easy to move and storage. 
   Another advantages of this invention is for the function that full-fill the joint of fixed and movable pulleys in joint of a cable is that the are simple machine and simple machines multiply effort and get large mechanical advantage. 
   Another objects and advantages of this invention will become more apparent after a more careful study of the following detailing description which is to be read with reference to the accompanying drawings wherein is illustrated and preferred embodiment of my invention. 

   
     DRAWINGS 
     Figures 
       FIG. 1  is a perspective view of Telescoping lift hand embodying the present invention; 
       FIG. 2  is a side elevational view of the telescoping lift hand truck shown in lowered position; 
       FIG. 3  is a side elevational view of the telescoping lift hand truck shown in position inclined for easy to move; 
       FIG. 4  is a plan view in lower position of the telescoping lift hand truck and have partial platform. 
       FIG. 5  is a perspective view in lower position of the telescoping lift hand truck and no have railing 
       FIG. 6  is a top plan view of the movable platform base of the telescoping lift hand truck, this is only one side. 
       FIG. 7  is a said view of the movable platform base of the telescoping lift hand truck. 
       FIG. 8  is a tap plan view of the right plurality mast of the telescoping lift hand truck. 
       FIG. 9  is a top plan view of the left plurality mast of the telescoping lift hand truck. 
       FIG. 10  is a perspective of the second mast of the telescoping lift hand truck. 
       FIG. 11  is a perspective of the third mast of the telescoping lift hand truck. 
       FIG. 12  is a perspective of the base stationary of the telescoping lift hand truck. 
       FIG. 13  is a side elevation of the sectional upper of third, second and first mast of telescoping lift hand truck. This is when the machine is in lower position. 
       FIG. 14  is a side elevation the sectional lower of third, second and first mast of the telescoping lift hand truck, this is when the machine is in power position. 
       FIG. 15  is a perspective of optional piece for stability of telescoping lift hand truck, 
       FIG. 16  is a perspective of optional piece for stability of telescoping lift hand truck, this part inside in the part is the stationary base; 
       FIG. 17  is a top plan view of the telescoping lift hand truck when no have railing 
       FIG. 18  is a perspective view of telescoping hand truck this have four pair of vertical posts and no have railing 
   

   DETAILED DESCRIPTION 
   The preferred embodiment of hand truck with telescoping elevator and folding platform will be described with reference to  FIGS. 1 to 7 . 
   The present invention comprises a base stationary  10  whereby the base  10  move only if inclined to side of the wheels  13 . The base  10  include pair the base side members  11 . This base is a rectangular tub and support a base cross member  15 , a vertical plate  16 , an axle  14  and two stationary mast  23  is welding to the base side member  11 . The base cross member  15  is rectangular tube and go over two base side member  11  to welded, this base cross member  15  support vertical plate  16 . The vertical plate  16  is welded to the base cross member  15  and in the side of the base side member  11 . This vertical plate  16  support the motor  66  in the base cross member  15  inside optional piece for stability  67  and  67 A 
   This base cross member  15  support the axle  14  this axle  14  support in the end the wheels  13 . 
   In the base side member  11  enter rectangular tube  12  for more stability, this rectangular tub  12  is the less thickness the base side member  11   
   The base cross member  15  enter a rectangular tube  67  for more stability and inside this rectangular tub  67  have another rectangular tube  67 A of less thickness. If the machine is close to the wall, the piece  67 A can be remove or regulated 
   Each base side member  11  have fixed to a mast  23 , and this mast  23  is stationary, and vertical. This mast  23  is inside the another mast movable  24 , and this mast  24  is inside the another mast movable  25 , 
   The movable platform base  35  support the folding platform  44  in this lower extreme for two pin  42 , the pin  42  connect the lower side of the movable platform base  35  to one extreme of platform  44 , also this movable platform base  35 , support from the upper side to the center o between center and extreme opposite to the pin  43  in the upper side of movable platform base  35 , have one shackle  43  in this piece inside one chain  34  an support platform  44 . 
   This portion of platform  44 , have three railing  46 ,  47 ,  48 , two railing  46 ,  47 , joined for hinges  49 , the another railing  48  is free for take out easy, if the work is close to wall. The railing  46 , and other  48 , is supported for portion of platform  44  in three vertically square tub in the extreme and center  50 , this is more broad of the railing  46 ,  47 ,  48 , and for stability used the upper outside part  36  of the platform,  44  is shown better in  FIG. 2 . 
     FIG. 3  illustrates the lift in position inclined easy to move an storage or transport. This don&#39;t have the bars for stabilized  12  in this moment the platform  44  is move over axis  42  and put in position joined to the mast  25  afterwards to tie two portion of the platform one folding platform  44  have two handles  51 . 
     FIG. 4  shows all parts and illustrates the motor  66 , masts  23 ,  24 ,  25  axle chain  68 , cross member  15 , cross plate is and wheels  13 . 
     FIG. 5  is when star to assembly the lift hand truck. 
     FIGS. 6 and 7  is a movable platform base  35  and have part of portion the platform  45 A and is reinforced for  41  and  37 , also have shackle  43 , pulley  54  and the pin  42  for support the folding platform. 
     FIGS. 8 and 9  is the top plant of two sets the post  23 ,  24 ,  25 . This have the pulleys  27 ,  29 ,  77 . The black circular in the pulleys is the cable  60  in position to descent. 
     FIG. 10  shows second mast movable  24 , This have pulley  26  in the lower side and another pulley  27  in upper side, also three bearings in the top  39  and have a piece welding in the top  24 C for stop third posts when to bump piece  25 A in the third post  25  and use for third mast  25  none go more up and have hole  24  B for security lock  74  this shows in  FIG. 13 . 
   The bearings  39  is for to relive to rub shoulders with another third mast  25 . This mast  24  have another stop in the lower interior position  24 A, This is stop with the stationary mast  23  this mast  23  have one extension in one upper side see in  FIG. 12   
     FIG. 11  shows third movable mast  25 . This have pulley  28  in the lower side and another pulley  29  In the upper side, also have three bearing  39  in lower position. The bearing  39  is for to relive to tube shoulders with another mast  24 . this mast  25  have another stop  25 A in the lower position in interior side, this stop  25 A the movable mast  24   
   The mast  25  have holes in one side  25 B for security lock  74  this show in  FIG. 13  security lock  74  is over of mast  24   
     FIG. 12  illustrates all base stationary  10  this base  10  have two base side members  11 . This two base members  11  is joined for a base cross member  15  and the plate  16  this plate support the motor  66 , this show in  FIG. 4 . 
   Two base side member  11  support mast  23 , this is perpendicular and is welding and is stationary send to the base. This mast have in the lower position interior side one longer bearing  20 , That bearing  20  use since pulley, and in the top the mast  23  have one pulley  77  and security lock  75 . 
   This two base member  11  in one extreme united for the axle  14 , but the axle is supported by bearings  21 , which is supported for two pieces  22 ,  22 A the  22 A is welded to the side member  11 , also the stationary mast  23 , and the vertical plate  16 , the piece  22  is welded to the stationary mast  23  and the vertical plate  16 , both  22  and  22 A have in common the axle  14 . This axle  14  have four bearing and two wheels in the ends. The axle have two cables reel  18  in the front the stationary mast  23 . 
   Between the cable reel  18  and the lower bearing  20  of the mast  23  have another bearing  19 . The axle have chain wheel  69 , this are connected to the motor  66  and the chain  68  as showing in  FIG. 4 . 
     FIG. 13  The tap portion when the machine is in the lower position, here have three mast  23 ,  24 ,  25  and have the pulleys  27 ,  29 ,  77  the security lock  74 ,  75  the bearing  28  to prevent shoulders. 
     FIG. 14  The lower portion when the machine is in the lower position, here have three mast  23 ,  24 , 25  have the pulleys  26 ,  28 ,  20 ,  19  have the wheels  13  and the bearing  39  to prevent shoulders. 
     FIG. 15  illustrates the bar  59  this bar is rectangular tub, that have two part  61 ,  62  the bar more broad  61  and less broad  62  this be inside on  61 . If the machine is closed to the wall the bar less  62  is adjustable. The bar more broad  61  have two pieces welding, this pieces  63  inside on the long bar  12   
     FIG. 16  illustrates the rectangular tube  67 ,  67 A for stabilized machine and that inside in the cross rectangular tube  15  this rectangular tube  67 A inside in the rectangular tube  67   
     FIG. 17  show top plant of the machine in position lower before assembly. 
     FIG. 18  show is same  FIG. 1  more safety for stability and fourth mast 
     FIG. 1  is the machine at his maximum raising position and  FIG. 2  is the lowering position when a worker is on the platform  44  he can easily used the controlled to raising and lowering. 
   The motor  66  move the chain  68 , the chain  68  move chain wheel  69 , the chain wheel  69  is fixed in the axle  14 , the axle  14  move two cable reel  18 , the cable  54  is to coil in the cable reel  18 , this cable  54  to pass for two bearing  19 ,  20 , the cable  54  to continue upward to the pulley  77  and continue downward and connect to the pulley  26 , the cable  54  to continue up ward to the pulley  27  the second mast  24 , the cable  54  continues downwardly to the lower pulley  28  and upwardly to the pulley  29  belonging at the third mast  25 , the cable  54  lowering to the pulley  72  the movable platform base  35  and the cable  54  continues to the upper side of the third mast  25  the cable  54  is fixed in the upper of the third mast  25 . When the motor  66  star of cable  54  going for all bearing and pulley before said, and the dist enter the platform and the upper pulley  29  of the third must  25  is reduce afterwards the platform  45  to raise, when the base  35  go to the maxim raising have one stop, after this stop star to raising third mast  25  when said mast  25  go to the maxim raising have another stop and star to raising another second mast  24 , when said second mast  24  stop in the maxim upper position of the machine, this explain  FIG. 1   
   While the invention herein disclosed has been described by means of specific embodiments an applications thereof, numerous modifications an variations could be made thereto by those skilled in the art with out departing from the scope of the invention defined in the appended claims.