Internal-combustion engines – Poppet valve operating mechanism – Rocker
Patent
1996-05-02
1997-02-04
Lo, Weilun
Internal-combustion engines
Poppet valve operating mechanism
Rocker
123 9041, 74519, 74559, 298882, B22C 922, F01L 118
Patent
active
055988156
ABSTRACT:
A roller lever (1) of a casting material configured as a finger lever for a valve drive of an internal combustion engine and comprising a first end portion (2) and a second end portion (4) connected to each other by side walls (7, 8) whose central portions (6) define a free space (9) in which a rotatably mounted supporting roller (10) is guided, said side walls (7, 8) comprising, in a region of the supporting roller (10), circular ring-shaped running surfaces (13, 14) facing the free space (9), the roller lever (1) further comprising a mold parting line (15) resulting from manufacture in a casting mold having a mold parting, characterized in that the mold parting line (15) between two halves of the casting mold extends outside of the running surface (13, 14) along a peripheral contour (16) of the running surfaces (13, 14) and a roller lever of a casting material configured as a rocker arm for a valve drive of an internal combustion engine, one end region of the roller lever being a fork-shaped region for receiving a supporting roller, and side walls of said fork-shaped end region comprising circular ring-shaped running surfaces, the roller lever comprising mold parting line (15) resulting from manufacture in a casting mold having a mold parting, characterized in that the mold parting line (15) between two halves of the casting mold extends outside of the running surfaces (13, 14) along a peripheral contour (16) of the running surfaces (13, 14).
REFERENCES:
patent: 4955121 (1990-09-01), Sato et al.
patent: 5060606 (1991-10-01), Hubbard
patent: 5251585 (1993-10-01), Graber
INA Walzlager Schaeffler KG
Lo Weilun
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