PATENT CLAIM ANALYSIS

Application Number: 15755964
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2019-02
Patent Classification: ["060", "414000"]

Abstract:
A hydraulic energy regeneration system for a work machine for boosting a pressure of a return hydraulic fluid of a hydraulic cylinder and regenerating the hydraulic fluid, prevents a bottom pressure from reaching an overload relief set pressure and suppresses a changeover shock to ensure favorable operability. The hydraulic energy regeneration system for the work machine, includes: a communication pressure boost passage that can boost a pressure of a discharge-side hydraulic fluid by communicating a discharge side and a suction side of the hydraulic cylinder with each other during an own weight fall of a driven body; a communication pressure boost valve that is disposed in the communication pressure boost passage and that can regulate one of or both of a pressure and a flow rate of the communication pressure boost passage; a reuse-side line and a reuse control valve or a regeneration-side line and a regeneration control valve that can regenerate a hydraulic fluid discharged from the hydraulic cylinder during the own weight fall of the driven body; and a controller. The controller is configured to reduce an opening degree of the communication pressure boost valve in response to an increase of the discharge-side pressure of the hydraulic cylinder right after the discharge-side pressure reaches a preset high load set pressure, and gradually reduces the opening degree of the communication pressure boost valve with passage of time.

Claim (Index 1):
A hydraulic energy regeneration system for a work machine, comprising:\n a hydraulic cylinder that contracts during driving of a driven body or an own weight fall of the driven body; a communication pressure boost passage that can boost a pressure of a discharge-side hydraulic fluid by communicating a discharge side and a suction side of the hydraulic cylinder with each other during the own weight fall of the driven body; a communication pressure boost valve that is disposed in the communication pressure boost passage and that can regulate one of or both of a pressure and a flow rate of the communication pressure boost passage; a reuse-side line and a reuse control valve that can reuse a hydraulic fluid discharged from the hydraulic cylinder or a regeneration-side line and a regeneration control valve that can regenerate the hydraulic fluid discharged from the hydraulic cylinder as electric energy, during the own weight fall of the driven body; a first pressure sensor that can detect a discharge-side pressure of the hydraulic cylinder; an operation device that causes the own weight fall of the driven body; an operation amount sensor that detects an operation amount of the operation device; and a controller that is configured to input therein a signal indicating the discharge-side pressure of the hydraulic cylinder detected by the first pressure sensor and a signal indicating the operation amount of the operation device detected by the operation amount sensor, and that can control the communication pressure boost valve, characterized in that the controller is configured to reduce an opening degree of the communication pressure boost valve in response to an increase of the discharge-side pressure of the hydraulic cylinder detected by the first pressure sensor right after the discharge-side pressure reaches a preset high load set pressure, and gradually reduces the opening degree of the communication pressure boost valve with passage of time.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 88.0
- Lexical Diversity: 2.58696
- Patent Class: 60.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15554601', '15501927', '15516089', '15504993', '14761384']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.764098079605075
- 35 USC 102 Novelty (BERT): 0.5152594362741569
- Combined Prediction Score: 0.7392142152719833
- Mean Citation Score: 336.56533800000005
- Max Citation Score: 359.81717000000015
- Similarity Product: 317.59106586851425

Labels:
- Claim Label 101: 1
- Claim Label 102: 0
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 0
- Label 101 Adjusted: 1

Dataset: test