Sound insulation structure for tractor

Land vehicles: bodies and tops – Bodies – Lining

Reexamination Certificate

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Reexamination Certificate

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07399020

ABSTRACT:
A tractor includes a plurality of wheels; a vehicle body frame supported by the wheels; an engine supported by the vehicle body frame; an engine hood for covering the engine; a cabin disposed rearwardly of the engine hood; an engine hood support frame for supporting the engine hood; wherein a gap is formed between the engine hood and the cabin and a gap is formed between the engine hood support frame and the cabin; an engine side sound insulating wall closing a rearward opening of the engine hood; a cabin side sound insulating wall provided to the cabin in opposition to the engine side sound insulating wall wherein the engine side sound insulating wall and the cabin side sound insulating wall defining a gap therebetween which opens to exterior space outside the cabin.

REFERENCES:
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patent: 6524691 (2003-02-01), Sugawara et al.
patent: 6550571 (2003-04-01), Kimura et al.
patent: 6554101 (2003-04-01), Watanabe et al.
patent: 6561562 (2003-05-01), Hesch
patent: 7080712 (2006-07-01), Tsuiki et al.
patent: 2006/0151222 (2006-07-01), Tinti
patent: 11-278040 (1999-10-01), None
patent: 2001-122165 (2001-05-01), None
patent: 2006-036073 (2006-02-01), None

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