Internal-combustion engines – Poppet valve operating mechanism – Tappet
Reexamination Certificate
2006-08-08
2006-08-08
Denion, Thomas (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
Tappet
C123S090480, C123S090160
Reexamination Certificate
active
07086360
ABSTRACT:
The invention concerns a mounting and anti-rotation device (mounting aid) (1) for roller tappets of a valve train of an internal combustion engine in which gas exchange valves are activated by roller tappets. The roller tappets comprising a substantially cylindrical tappet body are retained in receptions (7, 8) of the mounting aid (1) that is made of plastic. With the help of opposing parallel anti-rotation surfaces that are arranged symmetrically to the longitudinal axis of the roller tappet and are disposed on the end of the tappet body that is oriented away from a roller, the roller tappets are guided secured against rotation in the mounting aid during the operation of the internal combustion engine. This is achieved by the fact that the inner profile of the receptions (7, 8) is matched to the outer profile of the roller tappets. To avoid mixing up the switchable with the non-switchable roller tappets during assembly, the distances between the anti-rotation surfaces on the different roller tappets, and thus also the inner contours of the corresponding receptions (7, 8) are chosen so as to differ markedly from each other. To achieve the correct orientation of the switchable roller tappets, for example, relative to an oil gallery, the anti-rotation surfaces of the switchable roller tappets and the corresponding receptions (8) of the mounting aid (1) are arranged asymmetrically to the longitudinal axis of the tappet body and comprise a groove (32) or a rib (35), respectively.
REFERENCES:
patent: 5088455 (1992-02-01), Moretz
patent: 5546899 (1996-08-01), Sterling
patent: 5678514 (1997-10-01), Mazzella
patent: 6257189 (2001-07-01), Moretz et al.
patent: 6405699 (2002-06-01), Church
patent: 6615784 (2003-09-01), Faria et al.
patent: 6745737 (2004-06-01), Evans et al.
patent: 101 10 914 (2002-09-01), None
patent: 102 25 721 (2003-01-01), None
patent: 101 42 329 (2003-03-01), None
patent: 102 12 522 (2003-10-01), None
Evans Matthew
Faria Christof
Sailer Peter
Schnell Oliver
Chang Ching
Denion Thomas
Ina-Schaeffler KG
Muserlian Charles A.
LandOfFree
Assembly and torsional stop device for roller tappets of a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Assembly and torsional stop device for roller tappets of a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Assembly and torsional stop device for roller tappets of a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3638636