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 4):
The hydraulic energy regeneration system for the work machine according to  claim 1 , further comprising:\n a second communication pressure boost passage that is disposed in parallel to the communication pressure boost passage and that communicates the discharge side and the suction side of the hydraulic cylinder with each other during the own weight fall of the driven body; and a second communication pressure boost valve that is disposed in the second communication pressure boost passage and that can regulate one of or both of the pressure and the flow rate of the communication pressure boost passage, wherein the operation device is configured into a hydraulic pilot type, and an opening degree of the second communication pressure boost valve is regulated in response to the operation amount of the operation device.

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): 0.7641862119299149
- 35 USC 102 Novelty (BERT): 0.5154287478339444
- Combined Prediction Score: 0.7393104655203179
- Mean Citation Score: 336.56533800000005
- Max Citation Score: 359.81717000000015
- Similarity Product: 311.1016579159112

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

Dataset: test