• The problem solved:  The main aim was to design a slip-free, stepless variable speed, positive drive where the number of revolution of the output shaft can continuously be adjusted while the output shaft runs with a constant number of revolution.
  
• Definition:  The object of the invention is a slip-free, stepless variable speed, positive drive. The number of revolution of the output shaft can continuously be adjusted while the output shaft runs with a constant number of revolution.

   

• Presentation: The basic principle of the invention is shown in the figure below.: A cylindrical shell is divided in two parts using two straight lines of the same obliquity (these are called bars). The lower end of one bar is connected to the upper end of the other bar along the cylindrical shell through a constant pitch thread (this is called pusher).

  If the bar is pushed by the pusher from point (P1) to point (P3) along a vertical line that is touching the bar, then (bar 1.) will turn away from (P5) to (P3) while (bar 2.) will turn away from (P6) to (P4) both describing an (x) arc.

  Point (P2) of the pusher moves into point (P3) describing a (t+x) arc. In this point it stops pushing (bar 1.) and, simultaneously, point (P1) of the pusher moves into point (P4) describing a (t+x) arc and, from here, it can continue to push (bar 2.) similarly to the previous pushing process.

i=x/(t+x) and t=diam/2

Accordingly, when the pusher turns away describing a 2(t+x) arc then (bar 1.) and (bar 2.) turn away describing together a (2x) arc, setting the obliquity of the bars at a common value of (x). Consequently, the drive is continuous.

The transmission ratio is i=x/(t+x). The enforced pushing of the touching between the pusher and the bars is to be solved to achieve the principle of the continuous, positive drive.

• Application: It can be used in vehicles, machine tools and agricultural machines, motorcycles, etc.
  
• Advantages: Keeping constant the speed of the input shaft any required speed of the output shaft can be adjusted within the limits of the given transmission ratio and, does not occur slip during the change of transmission ratio or torque conversion. This property makes possible that the driving engine run at the most favourable speed. Since the interruption of the drive is not required during the change of speed this results in the saving of energy and in case of motor vehicles this results in a more favourable acceleration.

   

• Stage of development: Technical drawings and description has been prepared.

   

• Available documentation:  Yes, design drawings and written information are available on request.

2. The inventor:  

• Name:  István Dezső LANTOS
  
• Introduction: The inventor is a retired machine technician, graduated in a mechanical engineering college. He attended also high school and university courses.

3. The protection: 

• Form:  patent application (registration no.: P 03 02253/1)
• Priority: 17 July, 2003.
• Countries: 
• Owner of patent: The inventor

4. Business purpose:  Licensing

5. Contact: 

• Name:  István Dezső LANTOS
• E-mail:  
• Fax: 
• Telephone:  +36 46 428-197
• Address:  H-3525. Miskolc, Közdomb u. 42., Hungary