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 9):
An excavator of a vehicle comprising:\n an excavator swing mechanism; a prime mover mechanically connected to a first hydraulic pump/motor; a second hydraulic pump/motor mechanically connected to the excavator swing mechanism; a hydraulic circuit connecting the first hydraulic pump/motor, the second hydraulic pump/motor, a hydraulic accumulator, and a hydraulic reservoir; an isolation valve associated with the hydraulic accumulator which selectively disconnects the hydraulic accumulator from the rest of the hydraulic circuit; wherein the system is operable in a first mode where the second hydraulic pump/motor acts as a pump to retard movement of the excavator swing mechanism, the pressurized hydraulic fluid from the second hydraulic pump/motor is pumped into the hydraulic accumulator when the isolation valve is open; and wherein the system is operable in a second mode wherein the second hydraulic pump/motor provides a supplementary power to the swing mechanism using pressurized fluid from the hydraulic accumulator when the isolation valve is open; and wherein the system is operable is a third mode where the second hydraulic pump/motor acts as a pump to retard movement of the excavator swing mechanism, the pressurized hydraulic fluid from the second hydraulic pump/motor rotates the first hydraulic pump/motor as a motor which provides supplemental power to the prime mover when the isolation valve is closed.

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): 0.7418324007623401
- 35 USC 102 Novelty (BERT): 0.5863426996363067
- Combined Prediction Score: 0.7262834306497368
- Mean Citation Score: 330.154688
- Max Citation Score: 528.4036
- Similarity Product: 473.9226997531414

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

Dataset: test