| US 7,461,643 B2 | ||
| Breather assembly for an internal combustion engine | ||
| Douglas D. Reichardt, West Bend, Wis. (US); and Charles J. Lamb, Greendale, Wis. (US) | ||
| Assigned to Harley-Davidson Motor Company Group, Inc., Milwaukee, Wis. (US) | ||
| Filed on Oct. 06, 2006, as Appl. No. 11/539,338. | ||
| Prior Publication US 2008/0083398 A1, Apr. 10, 2008 | ||
| Int. Cl. F02M 25/06 (2006.01) | ||
| U.S. Cl. 123—572 | 18 Claims |
| 1. A rocker box assembly for a motorcycle engine having a cylinder head, the rocker box assembly comprising:
a base configured to be coupled to the cylinder head, the base including a receiving aperture;
a rocker chamber cover coupled to the base and cooperating with the base to at least partially define a rocker chamber, the
cover defining a chamber that cooperates with the receiving aperture of the base to at least partially define a breather assembly
housing within the rocker chamber, the cover further including an outlet aperture; and
a breather assembly positioned within the breather assembly housing and operable to vent a pressure pulse from within the
engine out of the rocker chamber, the breather assembly being operable to vent the pressure pulse in an upward direction and
out of the breather assembly through the outlet aperture of the cover.
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