Failure detection device for hydraulic motor and hydraulic...

Excavating – Ditcher – Condition responsive

Reexamination Certificate

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C060S420000

Reexamination Certificate

active

06912803

ABSTRACT:
A failure detection device for a hydraulic motor according to the present comprises a hydraulic pump (3) that is driven by a prime mover (2); a hydraulic motor (1) that is driven by hydraulic oil discharged from the hydraulic pump (3); an abnormality detection device (35) that detects a sign of abnormal operation of the hydraulic motor (1); and a warning device (39, 40) that issues a warning when the sign of the abnormal operation of the hydraulic motor (1) is detected by the abnormality detection device (35).

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U.S. Appl. No. 10/950,945, filed Jun. 18, 2003, Ichimura et al.
U.S. Appl. No. 10/466,451, filed Jul. 16, 2003, Ichimura.

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