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 2):
The hydraulic energy regeneration system for the work machine according to  claim 1 , comprising\n a second pressure sensor that can detect a suction-side pressure of the hydraulic cylinder, wherein the controller is configured to input therein a signal indicating the suction-side pressure of the hydraulic cylinder detected by the second pressure sensor, and controls the communication pressure boost valve in response to the signal indicating the suction-side pressure of the hydraulic cylinder.

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): 0.7639765101173644
- 35 USC 102 Novelty (BERT): 0.5150257720505776
- Combined Prediction Score: 0.7390814363106858
- Mean Citation Score: 336.56533800000005
- Max Citation Score: 359.81717000000015
- Similarity Product: 326.5462309438766

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