U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Exhaust system for a motorcycle

Patent 6334501 Issued on January 1, 2002. Estimated Expiration Date: Icon_subject August 18, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

Motorcycle exhaust systems
Patent #: 4327811
Issued on: 05/04/1982
Inventor: Isaka

Exhaust system for multicylinder motorbike engine
Patent #: 4359865
Issued on: 11/23/1982
Inventor: Nakao ,   et al.

Exhaust system for motorcycle
Patent #: 4522282
Issued on: 06/11/1985
Inventor: Yamamoto

Exhaust gas control means for engine
Patent #: 4795420
Issued on: 01/03/1989
Inventor: Sakurai ,   et al.

Muffler for motorcycle
Patent #: 5979583
Issued on: 11/09/1999
Inventor: Amino, et al.

Motorcycle exhaust system Patent #: 6193004
Issued on: 02/27/2001
Inventor: Cooksey, et al.

Inventor

Application

No. 642503 filed on 08/18/2000

US Classes:

180/309, With means for handling motor exhaust180/219Arranged in tandem

Examiners

Primary: Hurley, Kevin

Attorney, Agent or Firm

Foreign Patent References

  • 58 214416 JP. 12/13/1983
  • 60 93111 JP. 05/13/1985

International Class

B60K 013/04

Foreign Application Priority Data

1999-09-16 JP

Abstract

In an exhaust system for a motorcycle with a V-type engine mounted thereon, the front cylinder exhaust line has a first exhaust pipe arranged to the front while the rear cylinder exhaust line has a second exhaust pipe arranged to the rear. The first and second mufflers are attached to one side of the vehicle body with the second muffler arranged in parallel to and above the first muffler and shifted behind with respect to the first muffler. The first expansion chamber of the first muffler and the first expansion chamber of the second muffler are connected to be in communication with each other by means of a communicating pipe. One end of the communicating pipe is joined to the peripheral surface of the muffler cylinder corresponding to the first expansion chamber of the first muffler while the other end is connected in parallel with the second exhaust pipe to the front-end entrance port of the second muffler corresponding to the first expansion chamber of the second muffler.

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