Non-circular rotary component

Details Non-circular rotary component Non-circular rotary component

2004-09-20

2009-02-24

Chang, Ching (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Camshaft drive means

C123S090170, C464S160000

Reexamination Certificate

active

07493880

ABSTRACT:
A non-circular sprocket component comprises a rotor (11) having a plurality of teeth (16) arranged around the perimeter of the rotor, each tooth having a crown (9), and each pair of adjacent teeth having a valley (8) therebetween. The crowns of the teeth lie on a curved envelope forming the perimeter of the rotor. The perimeter has a non-circular profile having at least two protruding portions (22, 23) alternating with receding portions (24, 25). The distance between the midpoints (V) of the crowns (9) of each pair of adjacent teeth is substantially the same. The profile of the valley (8) between each pair of adjacent teeth is substantially the same. The distance between the midpoint (V), of each crown (9) and the axis (A) of the rotor varies around the perimeter to produce the said non-circular profile.

REFERENCES:
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patent: 5417186 (1995-05-01), Elrod et al.
patent: 6776067 (2004-08-01), Bogelein et al.
patent: 7044875 (2006-05-01), Gajewski
patent: 7232391 (2007-06-01), Gajewski
patent: 2 401 806 (2001-09-01), None
patent: A 195 20 508 (1996-12-01), None
patent: 63106453 (1988-05-01), None

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