Motor vehicles – Special wheel base – Having only two wheels
Reexamination Certificate
1999-07-29
2001-02-27
Hurley, Kevin (Department: 3619)
Motor vehicles
Special wheel base
Having only two wheels
C181S228000
Reexamination Certificate
active
06193004
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to motorcycle exhaust systems.
BACKGROUND
It is known to support motorcycle exhaust systems with brackets mounted to the frame. Each exhaust system typically includes an exhaust pipe and, optionally, a muffler. Typical prior art support brackets support one or more exhaust systems. It is also known to provide cross pipes, distinct from the support brackets, between separate motorcycle exhaust systems to create cross-talk, which improves the efficiency of the exhaust systems. Typical prior art cross pipes extend between two exhaust systems, connecting the exhaust pipes at points remote from the mufflers.
SUMMARY
The present invention involves designing the support bracket of multiple exhaust systems to act as a cross pipe. The basic concept is to combine the support bracket and cross pipe into one component that both supports the exhaust systems and provides cross-talk between the exhaust systems. The invention also involves positioning the support bracket/cross pipe member such that it is substantially hidden from view while the motorcycle is in operation, and such that it does not obstruct a side view of the motorcycle engine.
More specifically, the present invention provides a motorcycle comprising a frame, an engine mounted to the frame and having first and second cylinders, first and second exhaust systems, and a support member mounted to the frame to support the first and second exhaust systems, and including a cross pipe portion in fluid flow communication between the first and second exhaust systems.
Preferably, each exhaust system includes an exhaust pipe and an optional muffler.
Other features and advantages of the invention will become apparent to those skilled in the art upon review of the following detailed description, claims, and drawings.
REFERENCES:
patent: 4359126 (1982-11-01), Aiba
patent: 4359865 (1982-11-01), Nakao et al.
patent: 4487288 (1984-12-01), Watanabe et al.
patent: 4815554 (1989-03-01), Hara et al.
patent: 4860538 (1989-08-01), Takeuchi
1993 and 1994 XLH Models Service Manual—pp. 2-64 and 2-65.
1997 J & P Cycles Catalog—pp. 23-42.
Yahama Star 1998 Catalog (published prior to Jul. 29, 1998); cover and 2 pages from within the catalog (not numbered).
Cooksey Charles K.
Crowe William
Massignan Andrew D.
Fischer Andrew J.
Harley-Davidson Motor Company
Hurley Kevin
Michael & Best & Friedrich LLP
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