CONSTRUCTION MACHINE

WIPO Patent Application WO/2004/111405

A1

Engine noise of a construction machine is effectively reduced without reducing cooling performance and with an increase in the height of a body cover kept minimum. To achieve the above, an air-intake opening portion (10) and an air discharge opening portion (11) are arranged in a body cover (8) of an upper rotating body (1), and a cooling fan (5) in an engine room covered by the body cover (8) is driven, taking cooling air in from the air-intake opening portion (10) to cool a heat exchanger (7) in the body cover (8) and discharging the air from the air discharge opening portion (11). The air-intake opening portion (10) is laterally offset from a position facing to a ventilation surface of the heat exchanger (7). Alternatively, plural air-intake opening portions are located in a scattered manner such that the plural air-intake opening portions include the offset air-intake opening portion offset from the ventilation surface of the heat exchanger (7).

NAKASHIMA HAJIME (JP)
UEDA KAZUHIRO (JP)
KIMURA YASUMASA (JP)
UTSUNO HIDEO (JP)
KOBAYASHI TOSHIYUKI (JP)

PCT/JP2004/008680

December 23, 2004

June 15, 2004

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KOBELCO CONSTR MACHINERY LTD (JP)
NAKASHIMA HAJIME (JP)
UEDA KAZUHIRO (JP)
KIMURA YASUMASA (JP)
UTSUNO HIDEO (JP)
KOBAYASHI TOSHIYUKI (JP)

B60K11/08; E02F9/00; E02F9/08; F01P11/12; F01P1/00; (IPC1-7): F01P5/06; F01P11/10; F01P11/12; B60K11/04; E02F9/00

JPH08277713A	1996-10-22
JPH0653250U	1994-07-19
JPH1182055A	1999-03-26
JPH041626U	1992-01-08
JPH09195771A	1997-07-29
JPS5087302U	1975-07-24

See also references of EP 1635049A4
None

Kotani, Etsuji (2-2 Nakanoshima 2-chome, Kita-k, Osaka-shi Osaka 05, JP)

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