Patent Publication Number: US-2003226418-A1

Title: Secondary twist handle throttle control for A.T.V.

Description:
BACKGROUND OF THE INVENTION  
       [0001] 1. Field of the Invention  
       [0002] This invention relates in general to throttle control devices and in particular to throttle control devices for All Terrain Vehicles wherein a twist handle throttle control is employed in addition to the original thumb throttle control.  
       [0003] 2. Prior Art  
       [0004] I have not found any product on the market that provides a twist handle throttle control that allows the original thumb throttle control to remain in operation. The current after market twist throttle control devices require the removal of the original thumb throttle control. These after market devices utilize the cable used in the original thumb throttle control, thus making it necessary to remove the original thumb throttle control. This new invention allows a simple installation at a reduced cost with out disturbing the original thumb throttle control and allowing the A.T.V. operator a choice of either using the new twist handle throttle control or the original thumb throttle control. I have found nothing on the market that allows this dual mode of operation. This new invention also allows the operator a quick method for locking the new twist handle throttle control when safety concerns are required.  
       SUMMARY OF THE INVENTION  
       [0005] In accordance with the present invention the Secondary Twist Handle Throttle Control comprises a metal tubing body with a lever connected to a wire rope which is connected to the original thumb throttle control. This new invention allows the operator to accelerate or decelerate with out interfering with the original thumb throttle control. A locking device can be employed when safety concerns are required.  
       OBJECTS AND ADVANTAGES  
       [0006] The principal object and advantage of the present invention is to provide a secondary twist handle throttle control for A.T.V&#39;s. The standard thumb throttle control originally installed on A.T.V&#39;s. causes hand fatigue when used for an extended period of time. The solution to this problem is the Secondary Twist Handle Throttle Control. This new invention will allow you to travel for long distances without experiencing hand fatigue. The simple twist handle operation allows you to accelerate or decelerate with a twist motion found on most two wheeled motorized vehicles. It is important to note that the Secondary Twist Handle Throttle Control is installed in addition to the original thumb throttle control. This invention is simple to install and does not alter the original thumb throttle control operation.  
       [0007] The second principal object and advantage is to provide a quick method for locking the Secondary Twist Handle Throttle Control so that the original thumb throttle control may be used solely when a quick throttle release is needed. This quick throttle release may be needed when an operator is inexperienced or where the terrain may be extreme or steep grades exist.  
       [0008] The third principal object and advantage is to allow the operator a choice of either the Secondary Twist Handle Throttle Control or the original thumb throttle control when operating the A.T.V. on flatter grades or long distance travel. When this new invention, the Secondary Twist Handle Throttle Control, is installed both the new twist handle throttle and the original thumb throttle controls are fully operational. 
     
    
    
     DRAWING FIGURES  
     [0009]FIG. 1 is a front perspective of the entire Secondary Twist Handle Throttle Control device installed next to the original thumb throttle control body and on the original handle bar of the A.T.V. The Secondary Twist Handle Throttle Control device has been shaded to highlight its position on the existing equipment.  
     [0010]FIG. 2 is a front elevation of the entire Secondary Twist Handle Throttle Control device installed next to the original thumb throttle control body and on the original handle bar with the new handle bar grip in place shaded. A section through the device is represented in this view. The wire rope is not shown as a section in this view.  
     [0011]FIG. 3 is an end elevation of the entire Secondary Twist Handle Throttle Control device installed next to the original thumb throttle control body and on the original handle bar with the new handle bar grip in place. A section through the end of the new handle bar grip is shown. 
    
    
     REFERENCE NUMERALS IN DRAWINGS  
     [0012] 10  new handle bar grip  11  metal tubing body  
     [0013] 12  tapered lever  13  0.125″ pin  
     [0014] 14  0.125″ wide slot  15  0.125″ hole in original handle bar  
     [0015] 16  0.0625″ hole  17  swage for 0.0625″ wire rope  
     [0016] 18  0.0625″ wire rope  19  swage for 0.0625″ wire rope  
     [0017] 10  two 0.125″ holes  21  0.125″ hole in metal tubing body  
     [0018] 22  hitch pin clip  23  0.125″ hole in original handle bar  
     DETAILED DESCRIPTION  
     [0019] As shown in the drawings the preferred Secondary Twist Handle Throttle Control device in accordance with the present invention includes a metal tubing body  11  (hot rolled electric weld tubing 1″×4.50″×0.0625″) with a lever  12  that is fillet welded on one end. The lever  12  being 0.125″ steel, is twisted 90° at the midpoint of it&#39;s length, the width is tapered with the widest end attached to the metal tubing body  11  this end is 0.4375″ wide. The narrow end is 0.25″ wide. A 0.0625″ hole  16  is drilled at the narrow end to accommodate a 0.0625″ wire rope  18  with a 0.0625″ swage  17 . The opposite end of the metal tubing body at 1.00″ from this end is a 0.125″ wide slot  14  at 0.625″ long being 135° referenced from the welded tapered lever  12 . This slot  14  is to accommodate the 0.125″×0.935″ pin  13  that passes through a 0.125″ hole  15  drilled through the original handle bar of the A.T.V. This 0.125″ pin  13  holds the metal tubing body  11  in place on the original handle bar and allows a twist motion to take place. Two 0.125″ holes  20  are drilled in the original thumb throttle control to accommodate the 0.0625″ wire rope  18  with a 0.0625″ swage  19 . For the Secondary Twist Handle Throttle Control to be operational the hitch pin clip  22  should be removed. This hitch pin clip  22  when in place provides a quick locking device for the Secondary Twist Handle Throttle Control when safety concerns are required. To install the new Secondary Twist Handle Throttle Control the original handle bar grip needs to be removed. Two 0.125″ holes  20  need to be drilled through the original thumb throttle control so the 0.0625″ wire rope  18  can be installed through the two 0.125″ holes  20  with the 0.0625″ swage  19 . A simple hole drilling jig can be used to insure proper alignment when drilling the two 0.125″ holes  15  &amp;  21  through the original handle bar. These two holes need to be drilled completely through the original handle bar. Install the metal tubing body  11  on to the original handle bar and place the 0.125″×0.935″ pin  13  in place. Place 0.0625″ wire rope  18  through the two 0.125″ holes  20  in the original thumb throttle control with the 0.0625″ swage  19 . Then place the 0.0625″ wire rope  18  through the 0.0625″ hole  16  in the tapered lever  12  with the 0.0625″ swage  17 . To finish this installation a rubber handle bar grip  10  is placed on to the metal tubing body  11 .