PATENT CLAIM ANALYSIS

Application Number: 16168033
Application Type: Utility
Filing Date: 2018-10
Publication Date: 2019-11
Patent Classification: ["060", "420000"]

Abstract:
A hydraulic drive unit of a hydraulic excavator is configured to include a first hydraulic pump (P 1 ) that discharges a hydraulic oil for activating a boom cylinder ( 36 ) and the like, a first electric motor (M 1 ) that drives the first hydraulic pump (P 1 ), a hydraulic pump for revolution (P 2 ) that discharges a hydraulic oil for activating a revolution motor ( 26 ), a second electric motor (M 2 ) that drives the hydraulic pump for revolution (P 2 ), and a motor control device ( 150 ) that controls the rotation of the first electric motor (M 1 ) and that of the second electric motor (M 2 ). The motor control device ( 150 ) is configured such that when the revolution of the revolving body is not activated by the revolution motor ( 26 ), control to deactivate the second electric motor (M 2 ) is performed.

Claim (Index 1):
A hydraulic drive unit of a hydraulic excavator, for use in a hydraulic excavator comprising:\n a traveling body capable of traveling; a revolving body provided on the traveling body in a horizontally revolvable manner and horizontally revolved by a revolution hydraulic actuator; and an excavator device provided to the revolving body and driven by a plurality of activation hydraulic actuators, the hydraulic drive unit including: a first hydraulic pump that discharges a hydraulic oil for activating the plurality of activation hydraulic actuators; a first electric motor that drives the first hydraulic pump; a hydraulic pump for revolution that discharges a hydraulic oil for activating the revolution hydraulic actuator; a second electric motor that drives the hydraulic pump for revolution; and a motor controller that controls the rotation of the first electric motor and that of the second electric motor, an actuator operation unit operated to activate each of the plurality of activation hydraulic actuators and the revolution hydraulic actuator; a plurality of first control valves that control the flow rates of respective hydraulic oils supplied from the first hydraulic pump to the plurality of activation hydraulic actuators; a revolution control valve that controls the flow rate of a hydraulic oil supplied from the hydraulic pump for revolution to the revolution hydraulic actuator; and a pilot pressure supply unit that supplies a pilot pressure for driving each of the plurality of first control valves and the revolution control valve according to the operation of the actuator operation unit, wherein the pilot pressure supply unit generates the pilot pressure using a hydraulic oil discharged from the first hydraulic pump, and the hydraulic drive unit being characterized in that when the revolution of the revolving body is not activated by the revolution hydraulic actuator, the motor controller performs control to deactivate the second electric motor.

Metadata:
- Claim Count in Document: 3.0
- Percentile: 97.0
- Lexical Diversity: 3.30189
- Patent Class: 60.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['10276304', '10528575', '10495421', '13771987', '14113658']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7534869627164505
- 35 USC 102 Novelty (BERT): 0.4985516515922767
- Combined Prediction Score: 0.7279934316040332
- Mean Citation Score: 292.953626
- Max Citation Score: 308.3538200000001
- Similarity Product: 255.82616481165888

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test