Helical cam device and method

Details Helical cam device and method Helical cam device and method

2008-07-01

2008-07-01

Chang, Ching (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Follower displaced axially of camshaft

C123S090180, C123S090200, C123S090600, C074S640000, C074S6650GD

Reexamination Certificate

active

11037419

ABSTRACT:
A helical cam device for use with a wide variety of applications generally includes a first cam component, a second cam component and an axial guide. The cam components each have a helical cam track located on an axial end, so that coaxial alignment of the two cam components allows opposing cam tracks to contact and rotate against each other. The helical cam tracks, which are preferably divided into quadrant sections, are designed such that relative rotational movement between the cam components causes a corresponding relative axial movement. According to one embodiment, the axial guide is a cylindrical rod passing through the center of the cam components; in another embodiment, it is a cylindrical sleeve surrounding the cam components. Moreover, barrel slots, detents and/or truncated peaks can be used to control the travel of the cam components.

REFERENCES:
patent: 1850544 (1932-03-01), Lee
patent: 1977828 (1934-10-01), Laib et al.
patent: 2176895 (1939-10-01), Engemann
patent: 2633112 (1953-03-01), Engemann
patent: 3955241 (1976-05-01), Little
patent: 4030161 (1977-06-01), Loikitz
patent: WO 01/79662 (2001-10-01), None

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