PATENT CLAIM ANALYSIS

Application Number: 15925821
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-07
Patent Classification: ["060", "414000"]

Abstract:
A swing drive system for an excavator is provided which utilizes a prime mover mechanically connected to a first hydraulic pump/motor and a second hydraulic pump/motor mechanically connected to a swing mechanism. The system includes a hydraulic circuit connecting a hydraulic fluid reservoir, a hydraulic accumulator, the first hydraulic pump/motor, and the second hydraulic pump/motor. The system is operable in one mode where the second hydraulic pump/motor acts as a pump to retard movement of the swing mechanism and pressurized hydraulic fluid from the second hydraulic pump/motor is pumped into the hydraulic accumulator. The system is operable in another mode where the pressurized fluid from the hydraulic accumulator is used to assist the prime mover in driving hydraulic consumers, including the swing drive.

Claim (Index 13):
A swing drive system of a vehicle comprising:\n a swing mechanism for the vehicle; a prime mover mechanically connected to a first hydraulic pump/motor; a second hydraulic pump/motor mechanically connected to the swing mechanism; a hydraulic circuit connecting a hydraulic fluid reservoir, a hydraulic accumulator, the first hydraulic pump/motor, and the second hydraulic pump/motor; wherein the system is operable in a first mode where the second hydraulic pump/motor acts as a pump to retard movement of the swing mechanism and pressurized hydraulic fluid from the second hydraulic pump/motor is pumped into the hydraulic accumulator; wherein the system is operable in a second mode wherein the second hydraulic pump/motor acts as a motor to provide supplementary power to the swing mechanism using pressurized fluid from the hydraulic accumulator; and further comprising a directional valve positioned within the hydraulic circuit for selectively reversing the flow of fluid through the hydraulic circuit and providing a fluid path to the hydraulic accumulator that does not pass through the reservoir, the directional valve connecting the accumulator and reservoir to high and low pressure lines respectively during swing operation in both directions.

Metadata:
- Claim Count in Document: 6.0
- Percentile: 90.0
- Lexical Diversity: 2.42593
- Patent Class: 60.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['14370795', '15522464', '15747266', '10953182', '13737679']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7381894769290858
- 35 USC 102 Novelty (BERT): 0.597624338355944
- Combined Prediction Score: 0.7241329630717717
- Mean Citation Score: 330.154688
- Max Citation Score: 528.4036
- Similarity Product: 524.6750593540191

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