Rotary expansible chamber devices – Intermittently accelerated and receding members rotate in... – Each a working member
Patent
1975-02-20
1977-01-18
Vrablik, John J.
Rotary expansible chamber devices
Intermittently accelerated and receding members rotate in...
Each a working member
74393, 74437, 74609, F01C 100, F04C 1700, F16H 3502, F16H 5504
Patent
active
040036812
ABSTRACT:
Two coaxial rotors are connected with a counter-shaft through two pairs of varying-motion gears of opposite phase. The two gears of each pair differ from each other to provide perfect mass-balance and improved accuracy. Tooth ratios of 1:2 and 1:1 are used. The gear pitch-surfaces that roll on each other without slippage intersect the circular pitch surfaces of uniform-motion gears of the same tooth ratio and center distance and on the gear rigid with a rotor they extend further out from said circular pitch surface than on the mating gear. The tooth shape is such that on uniform rotation of the counter-shaft the rotor has a uniform rotation plus an added harmonic motion.
The invention also provides a simplified production as a result of the novel tooth shape.
REFERENCES:
patent: 244290 (1881-07-01), Pennington
patent: 1298838 (1919-04-01), Weed
patent: 1485591 (1924-03-01), Bullington
patent: 2108385 (1938-02-01), Murakami
patent: 3256866 (1966-06-01), Bauer
patent: 3398643 (1968-08-01), Schudt
patent: 3430573 (1969-03-01), Groeger
patent: 3769946 (1973-11-01), Scherrer
Pesqueira, J. J., Principles of Design for Non-Circular Gears, in Product Engineering, Dec. 1936, pp. 454-457.
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