Internal-combustion engines – Poppet valve operating mechanism – Tappet
Reexamination Certificate
2006-12-12
2006-12-12
Denion, Thomas (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
Tappet
C123S090440, C123S090480, C123S090550
Reexamination Certificate
active
07146953
ABSTRACT:
The invention relates to a mechanical valve play compensation element for a valve drive on a piston combustion engine, comprising a first pressure part (1) which is axially displaceable in relation to a second pressure part (2) and which is fixed in such a way that it can turn about the axis of displacement; a torsion spring element (10) which acts between the first pressure part (1) and the second pressure part (2) and is axially flexible at least to a certain extent; and at least one helical surface (9.1) on the first pressure part (1), to which a corresponding helical surface (9.2) on the second pressure part (2) is allocated, these forming a pair of helical surfaces (9). The surfaces of the helical surface pair (9) are configured as a rough surface and are pressed against each other by the torsion spring element (10).
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patent: 3805753 (1974-04-01), Bergmann et al.
patent: 4941438 (1990-07-01), Muto
patent: 5626110 (1997-05-01), Regueiro
patent: 6415752 (2002-07-01), Janak
patent: 6834628 (2004-12-01), Duesmann
Chang Ching
Denion Thomas
Fev Motorentechnik GmbH
Kinberg Robert
Venable LLP
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