PATENT CLAIM ANALYSIS

Application Number: 16091687
Application Type: Utility
Filing Date: 2018-10
Publication Date: 2019-05
Patent Classification: ["416", "164000"]

Abstract:
A variable pitch mechanism for a helicopter is configured to have a simple configuration with a small number of members, and to be capable of precisely controlling a pitch angle of blades without accurate adjustment. A pitch plate  16  and a pitch plate boss  17  are slidably mounted on an outer periphery of a main mast  61 , and an output shaft of a servomotor  19  is directly connected to a pitch lever  18  that vertically moves the pitch plate boss  17 . By actuating the servomotor  19  and rotating the pitch lever  18 , the pitch plate boss  17  and the pitch plate  16  are displaced upward or downward along the main mast  61 , thereby tilting blade holders  13, 13  connected to the pitch plate  16  and changing a pitch angle of the blades  14.

Claim (Index 1):
A helicopter rotor head for changing a pitch angle of blades of a rotor head mounted on a main mast to fly, wherein\n blade holders that hold the blades are mounted on right and left sides of a yoke fixed to the main mast, a pitch plate unit is slidably mounted on an outer periphery of the main mast along an outer peripheral surface of the main mast, and the pitch plate unit and the blade holders are connected through pitch links, a pitch lever is supported on a lateral side of the main mast so as to be rotatable around an axial direction orthogonal to the main mast, a pair of arm sections protruding from an outer peripheral surface are mounted so as to face right and left sides of the main mast, and an output shaft of a servomotor is directly connected to a rotary shaft of the pitch lever, and when the servomotor is actuated, and the pitch lever directly connected to the output shaft of the servomotor is rotated, the pitch plate unit moves upward or downward along the main mast in conjunction with rotational displacement of the arm sections of the pitch lever on the right and left sides of the main mast, and the blade holders are provided so as to tilt to change the pitch angle of the blades.

Metadata:
- Claim Count in Document: 5.0
- Percentile: 97.0
- Lexical Diversity: 1.98592
- Patent Class: 416.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['14272839', '15757282', '12667495', '14302746', '12392426']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.743408694570799
- 35 USC 102 Novelty (BERT): 0.4409817918225538
- Combined Prediction Score: 0.7131660042959744
- Mean Citation Score: 211.141688
- Max Citation Score: 240.73668
- Similarity Product: 203.83144867996216

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

Dataset: test