Power plants – Internal combustion engine with treatment or handling of... – Having vibration attenuating – or expansion and contraction...
Reexamination Certificate
2006-05-30
2006-05-30
Tran, Binh Q. (Department: 3748)
Power plants
Internal combustion engine with treatment or handling of...
Having vibration attenuating, or expansion and contraction...
C060S272000, C060S312000, C060S323000, C285S187000, C285S291200, C285S294100, C285S294200, C181S212000, C181S215000, C181S222000, C181S227000, C181S241000, C181S253000, C181S254000
Reexamination Certificate
active
07051523
ABSTRACT:
Exhaust system assemblies employ wire bushings for thermal compensation to minimize noise due to “stick-slip” while the system cools. In a preferred embodiment, the wire bushings are formed of at least one strand of wire coiled about male end portions of pipe sections used in the system, each of which male end portions are inserted into a female end portion and held therein by an interference fit. The strand of wire is spot welded at spaced locations to the male end portions to provide bearing surfaces between the spot welds that move slightly as the exhaust system heats and cools to relieve thermal stress in small, substantially inaudible increments.
REFERENCES:
patent: 3581842 (1971-06-01), Hall
patent: 4137993 (1979-02-01), Rutt
patent: 5350888 (1994-09-01), Sager et al.
patent: 5365025 (1994-11-01), Kraai et al.
patent: 6189650 (2001-02-01), Inuzuka et al.
patent: 6571910 (2003-06-01), Storm
patent: 6840348 (2005-01-01), Takewaka et al.
General Motors Corporation
Hargitt Laura C.
Tran Binh Q.
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