EP 2025893 A1 20090218 - A reciprocating piston mechanism

Title (en)

A reciprocating piston mechanism

Title (de)

Hubkolbenmechanismus

Title (fr)

Mécanisme réciproque de piston

Publication

EP 2025893 A1 20090218 (EN)

Application

EP 07114078 A 20070809

Priority

EP 07114078 A 20070809

Abstract (en)

A reciprocating piston mechanism (1) comprises a crankcase (2), a crankshaft (3) which has at least a crankpin. The crankshaft (3) is supported by the crankcase (2). The mechanism (1) further comprises at least a connecting rod including a big end and a small end, a piston (12) being rotatably connected to the small end, a crank member (7) being rotatably mounted on the crankpin, and comprising at least a bearing portion (8) which is eccentrically disposed with respect to the crankpin, and having an outer circumferential wall which bears the big end of the connecting rod such that the connecting rod is rotatably mounted on the bearing portion (8) of the crank member (7) via the big end. The mechanism (1) further comprises a gear (13) which is fixed to the crank member (7), and an internal ring gear (14) which is disposed concentrically with respect to the crankshaft axis and which is fixed to and carried by an internal ring gear carrier (15). The gear (13) meshes with the internal ring gear (14) for rotating the crank member (7) with respect to the crankpin upon rotation of the crankshaft (3). The internal ring gear carrier (15) is connected to the crankcase (2) at an axial distance of the internal ring gear (14) and free from the crankshaft (3).

IPC 8 full level

F02B 75/04 (2006.01)

CPC (source: EP)

F02B 75/048 (2013.01)

Citation (search report)

[DX] WO 9627079 A1 19960906 - LEITHINGER SIEGFRIED FRANZ [CH]
[X] WO 9963247 A1 19991209 - GOMECSYS BV [NL], et al
[X] GB 1245329 A 19710908 - BONETTO FILIPPO [IT]
[X] US 1553009 A 19250908 - ERNEST STUKE
[X] DE 379257 C 19230818 - HANS ROHRBACH
[X] US 6450136 B1 20020917 - KLOMP EDWARD DANIEL [US], et al
[X] US 2002007813 A1 20020124 - SHIGEMORI YOSHIHARU [JP]
[X] US 5158047 A 19921027 - SCHAAL JACK E [US], et al
[X] EP 0184042 A2 19860611 - POLITECHNIKA WARSZAWSKA [PL]

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

Designated extension state (EPC)

AL BA HR MK RS

DOCDB simple family (publication)

EP 2025893 A1 20090218; WO 2009018863 A1 20090212

DOCDB simple family (application)

EP 07114078 A 20070809; EP 2007061224 W 20071019