The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 19, 1989
Filed:
Feb. 23, 1988
Esparbes Bernard, Hautes-Pyrenees, FR;
Aerospatiale Societe Nationale Industrielle, Societe Anonyme, Paris Cedex, FR;
Abstract
The invention relates to an internal-combustion engine having opposed integral annular pistons and a central shaft. The piston block (1), formed by the two pistons (2, 3) exhibits, at each axial end, an axial double skirt fitted with an outer crown (9) forming the piston head proper, and an inner crown (10) forming an admission pump with an antechamber (30) radially within the corresponding annular cylinder (5), wherein the piston head (9) delimits a combustion chamber (12). Radial pawls (22), penetrating axial ports (21) of the housing (4) and radial holes (18) of the piston block (1), have their inner radial ends engaged in sinusoidal circumferential undulated grooves (20) made in an enlarged central part (19) of the central driving shaft (8) driven in rotation by the reciprocating axial movements of the piston block (1). The admission of comburent gas and/or fuel is effected axially by the ends, through valves (29) and orifices (28) in end plates (6) closing the antechambers (30) in which slide the inner crowns (10, 10a) fitted with flaps (11) to function as an admission pump. Application to an internal-combustion engine, of this type is for use to particularly equip aircraft.