Exhibitor: Association of Hungarian Inventors - MAFE

Inventor and Invention:


Istvan BOGAR: Roller Gearing and Transmission Mechanism


1.  The Invention



Roller Gearing and Transmission Mechanism

The problem the inventor(s) wanted to solve:

Improve the performance of mechanical gearing and transmission devices such as higher power efficiency, higher contact factor and no back-lash


Rollers are introduced between the driving and driven wheels that when transmitting torque roll along the grooves machined onto the surfaces of the two wheels. The special shape and curve of the grooves ensure that the rollers carry out pure rolling motion with theoretically zero sliding friction.



There are two wheels (they can also be linear racks) with grooves on their surfaces and there are a number of rollers (e.g. balls) between the wheels rolling along the grooves. There is also a roller re-circulating mechanism that guides the rollers from the exit point on the grooves back to the entrance point.

Fields of application:

Applicable in all industries where mechanical gearing and power transmission is necessary including vehicles such as cars, trucks, trains, ships and aircrafts, but also cranes, lifts, conveyors and escalators, machines tools, pumps, mills, windfarms etc. 


Close to 100% power transmission efficiency, contact factor up to 20 or more, no back-lash. The implications of these include low operating costs, long lifetime, small size, high reliability, low noise and also smooth and precise movement. Also the design is very flexible and universally applicable for any geometry and applications. 

Stage of development:

Several prototypes ready and tested, just started pre-production phase

Documentation available:

Yes: leaflet, brochure, sample, video, website: www.sincroll.com

2.  The inventor (or inventors)



Istvan BOGAR

Self introduction:

Mechanical Engineer by education with 25 years of experience in R&D and 22 years of running own precision mechanics company.

Owner of the invention?


3.  Protection


Patent Status:
    - Patent(s) pending, international publication number WO 00 2007/077470 AI


    30 December 2005

Countries where it is in force, if granted

     Not granted yet

4.  Business intention


Priority: selling the patent, licensing, cooperation
Also have facilities to produce and sell product

Looking for investor(s)