These are a very specific parts of mechanical devices designed to as far as possible eliminate dangerous torsional vibration and ensure flawless operation of mechanical systems. In this area he implemented a number of engineering designs of pneumatic tuners and innovative practices, which primary aim was to as far as possible optimize the operation of mechanical devices. His “scientific research way” is thus naturally accompanied by a significant patent activities, by which it was adequately formed and enriched.

He “started” his patent activities already as a postgraduate student (1983 – 1989), when he began to examine the impact of newly developed pneumatic couplings on torsional vibration on the whole system under laboratory conditions. Over the years 1986 – 1987 the Office for Inventions and Discoveries of Czechoslovakia granted him the first patent certificates:

• Homišin, J.: Pneumatic flexible shaft coupling. P 254180/86.
• Homišin, J.: Pneumatic flexible shaft coupling with damping. P 252034/86.
• Homišin, J.: Pneumatic flexible shaft coupling with damping regulation. P 259224/87.
• Homišin, J.: Control system for ensuring the continuous change of pneumatic coupling characteristics. P 259225/87.

In the next period (1991 – 1998) he focused on the applied research of new coupling types (at first only in laboratory conditions), which design he was continuously improoving.

In addition to the research and development of new types of pneumatic couplings he suggested new ways of mechanical systems tuning in order to control torsional vibration and so optimize the operation of mechanical devices. The result of research in this field were five methods of mechanical systems continuous tuning - tuning during operation at steady state, based on patent protection:
a) continuous tuning of mechanical system with control system ensuring the continuous change of pneumatic coupling characteristics (HOMIŠIN,J.: Control system for ensuring the continuous change of pneumatic coupling characteristics.P 259225/87),
b) continuous tuning of mechanical system with control system for the realization of mechanical systems continuous tuning (HOMIŠIN, J.: Mechanical system suitable for the realization of its continuous tuning. P 276926/92. HOMIŠIN,J.:Control system for the realization of mechanical systems continuous tuning. P276927/92),
c) continuous tuning of mechanical system with application of pneumatic coupling with additional control system (HOMIŠIN, J.: pneumatic coupling with additional control system of constant twist angle. P278272/96),
d) continuous tuning of mechanical system with static optimisation based on the method of extremal control (HOMIŠIN,J.: Control circuit of torsional oscillating mechanical system. P 278499/97),
e) continuous tuning of mechanical system with application of pneumatic coupling with autoregulation (HOMIŠIN, J.: Pneumatic flexible shaft coupling with ability of autoregulation. P278025/95).

Patent activities of prof. Homišin have also international reach. Contractual cooperation with the Polish company Fabryka Elementów Napędowych located in Katowice (2010) resulted not only to the practical application of new pneumatic couplings (currently started the production of pneumatic couplings in that company), but has also brought other five patent applications at the Patent Office of Polish Republic.

Overall its patent activities include 43 patents and utility models granted by the Office for Inventions and Discoveries, as well as by the Industrial Property Office of the Slovak Republic.

The fact that prof. Homišin is generally recognized scientists not only within the TU Košice is also documented by his award Slovak Republic Technologist of the year 2010 on the competition Scientist of the Year, which he received for extraordinary patent activities in years 2008 – 2010 in the field of pneumatic flexible shaft couplings development, control and regulatory systems for realization of torsionally oscillating mechanical systems continuous tuning.

The results of prof. Ing. Jaroslav Homišin, CSc. extraordinary patent activities represent a significant technical and practical contribution in the field of controlling torsional vibration, as a source of dangerous vibration excitation of mechanical system drives, as the given solution creates a new method of mechanical systems continuous tuning during operation at steady state, especially in cases of unexpected (random) failures.

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