PATENT CLAIM ANALYSIS

Application Number: 15865071
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-05
Patent Classification: ["310", "234000"]

Abstract:
A commutator includes a cylindrical insulator and commutator pieces, which are formed on the outer circumferential surface of the insulator and arranged side by side in the circumferential direction of the insulator. The commutator pieces are each composed of a conductive plate material, and each includes a connection claw and an engagement claw. The connection claw extends outward in the radial direction of the insulator while being configured to electrically being connected to an armature coil. The engagement claw extends inward in the radial direction of the insulator and engages with the insulator. The commutator pieces each include a recess portion with an undercut formed in a surface facing inward in the radial direction of the insulator.

Claim (Index 1):
A method of manufacturing a commutator, comprising:\n forming a cylindrical insulator, and forming a plurality of commutator pieces about an outer circumferential surface of the insulator, and causing the commutator pieces to be arranged side-by-side in a circumferential direction of the insulator, wherein the steps of forming the cylindrical insulator and the plurality of commutator pieces, and causing the commutator pieces to be arranged side-by-side in a circumferential direction of the insulator include the steps of: repeatedly pressing a wedge into conductive plate material to form a plurality of recess portions in the conductive plate material, punching a substantially rectangular, flat blank portion from the conductive plate material such that the blank portion includes a plurality of connection claws and engagement claws, the blank portion including the plurality of recess portions, rolling the blank portion to form a unitary cylindrical portion, bending each of the plurality of connection claws such that each of the plurality of connection claws extends radially outward from the unitary cylindrical portion, bending each of the plurality of connection claws such that each connection claw extends outwardly in a radial direction of the unitary cylindrical portion and is configured to be electrically connected to an armature coil, pouring a thermosetting plastic material into the unitary cylindrical portion, using a die, to form the cylindrical insulator to cause each of the engagement claws to be engaged with the cylindrical insulator, and forming a plurality of axial grooves in the unitary cylindrical portion, thereby separating the unitary cylindrical portion into the plurality of commutator pieces, wherein: each of the plurality of commutator pieces includes a recess portion of the plurality of recess portions, the recess portion including an undercut formed in a surface facing inwardly in the radial direction of the insulator, the recess portion has a first sidewall, a second sidewall and a bottom surface between the first sidewall and the second sidewall, the first sidewall and the second sidewall tilt in a first tilt direction parallel to an axial direction of the insulator, the first sidewall projects over the bottom surface to form the undercut, and the second sidewall tilts more than the first sidewall in the first tilt direction, and a first ridge is formed between the first sidewall and the bottom surface, a second ridge is formed between the second sidewall and the bottom surface, the bottom surface tilts in a second tilt direction opposed to the first tilt direction, and, the second ridge is positioned deeper within the recess portion as compared to the first ridge.

Metadata:
- Claim Count in Document: 5.0
- Percentile: 86.0
- Lexical Diversity: 2.33962
- Patent Class: 310.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['10673339', '12146877', '12000630', '11554413', '11645790']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8396934369438265
- 35 USC 102 Novelty (BERT): 0.4784345856544469
- Combined Prediction Score: 0.8035675518148886
- Mean Citation Score: 186.121224
- Max Citation Score: 209.3339
- Similarity Product: 152.98327969756718

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