Excavating – Ditcher – Condition responsive
Reexamination Certificate
2005-07-05
2005-07-05
Pezzuto, Robert E (Department: 3671)
Excavating
Ditcher
Condition responsive
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. 10/466,451, filed Jul. 16, 2003, Ichimura.
Hitachi Construction Machinery Co. Ltd.
Oliff & Berridg,e PLC
Pezzuto Robert E
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