(19)
(11) EP 0 454 627 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
16.12.1992 Bulletin 1992/51

(43) Date of publication A2:
30.10.1991 Bulletin 1991/44

(21) Application number: 91830048.4

(22) Date of filing: 15.02.1991
(51) International Patent Classification (IPC)5: F02B 75/00
(84) Designated Contracting States:
DE ES FR GB IT SE

(30) Priority: 26.02.1990 IT 4520390

(71) Applicant: Lombardi, Paolo
I-56100 Pisa (IT)

(72) Inventor:
  • Lombardi, Paolo
    I-56100 Pisa (IT)

(74) Representative: Mannucci, Gianfranco, Dott.-Ing. et al
Ufficio Tecnico Ing. A. Mannucci Via della Scala 4
I-50123 Firenze
I-50123 Firenze (IT)


(56) References cited: : 
   
       


    (54) Engine with double-acting pistons and without connecting rods


    (57) An internal combustion engine comprises a crank-case (7), a cylinder (21), a piston (1) reciprocatingly slidable in said cylinder, an output shaft (11) and means for transforming the reciprocating motion of the piston into a rotating motion of the output shaft (11). According to the invention, the reciprocating motion of the piston is transformed into a rotating motion of the shaft by means of a bypocycloid gear transmission (5, 6) comprising a pair of externally toothed gears (5) connected to each other by means of a curved shaft (4) and a pair of internally toothed gears (6) solid to the crank-case (7). During reciprocating motion of the piston in the cylinder, the externally toothed gears roll along the internally toothed gears and transmit their motion to the output shaft by means of a flywheel (10).






    Search report