Internal-combustion engines – Accessories – Covers – trays – vibrators – corrosion inhibitors – air filters
Reexamination Certificate
2006-05-02
2006-05-02
Wolfe, Jr., Willis R. (Department: 3747)
Internal-combustion engines
Accessories
Covers, trays, vibrators, corrosion inhibitors, air filters
C123S090160, C123S090550
Reexamination Certificate
active
07036481
ABSTRACT:
A switching element (1) for a valve drive of an internal combustion engine is provided, preferably for deactivating a valve. The switching element has an outer section (2), in addition to an inner element (4) that can be axially displaced in a bore (3) of the outer section. The outer section (2) and the inner element (4) are displaced away from one another by action of lost-motion spring elements (5) and can be coupled together in an axially-distant relative position, whereby at least one piston (6), which is situated in a bore (7) that runs transversally through the inner element (4), acts as a coupling element. An annular groove (8), into which the piston (6) can be partially displaced to adopt its coupling position, is located in the bore (3) of the outer section (2). At least some sections of an underside (9) of the piston (6) have a flat transversal surface (11), which leads from a outer radial end face (10) of the piston and acts as a contact zone for an opposing annular surface (12) of the annular groove (8), and the piston is held in the inner element (4) by a rotational lock (13). Stop elements (15) are allocated to an inner radial end face (14) of the piston (6) for an uncoupling position of the piston, and the rotational lock (13) and the stop elements (15) are formed from one component.
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Müller Lutz
Sailer Peter
INA-Schaeffler KG
Volpe and Koenig P.C.
Wolfe, Jr. Willis R.
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