PATENT CLAIM ANALYSIS

Application Number: 15750677
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2018-09
Patent Classification: ["408", "224000"]

Abstract:
A kind of sawtooth structure with reversed cutting function and its drill series are specifically fitted for drilling carbon fiber reinforced polymers (CFRP). The sawtooth structure is constructed by sawteeth and grooves located on the cutting edges of drill. And the sawtooth structure is helically arranged with a large helix angle around the axis of the drill. It can be divided into left-hand sawtooth structure and right-hand sawtooth structure by the helix angle. The bottom edges of the left-hand sawtooth function as cutting edges, and the rake angles are positive, while the top edges of the right-hand sawtooth are ground as positive rake angles. The sawtooth structure can be applied into multiple drilling tools, which proves to be universal. And it can effectively reduce delamination at both hole entry and hole exit as well as burrs defects. The series of drilling tools are double point angle drill, twist drill and stepped drill with sawtooth structure on the cutting edges. And such forms of drilling tools can achieve hole drilling of CFRP with minimum drilling defects. The drilling performance of the tools is thus improved to a great extent, and the tool life is extended while maintaining low usage costs.

Claim (Index 3):
The right-hand double point angle drill with sawtooth structure stated in  claim 1  has characteristics as below: The right-hand sawteeth are arranged helically on the cutting edges of the drill with four flutes, and the sawteeth cutting zone ( 3 -E) is arranged at the front of the four secondary cutting edges at the secondary cutting zone ( 3 -B) and the end of the four minor cutting edges at the minor cutting zone ( 3 -C). The sawteeth cutting zone ( 3 -E) is constructed by sawtooth structure located at separated cutting edges; The number of sawteeth ( 1 - 1 ) on the secondary cutting edge is 1 to 3 and the number of sawteeth ( 1 - 1 ) on the minor cutting edge is 2 to 4; The sawteeth helix angle ( 1 -\u03b2) of all the sawteeth ( 1 - 1 ) is acute angle larger than 60\u00b0 as well as right-handed, and top edges ( 1 - 3 ) on the sawteeth perform as cutting edges that are ground into positive rake angles ( 1 -\u03b3 0 u).

Metadata:
- Claim Count in Document: 13.0
- Percentile: 88.0
- Lexical Diversity: 2.16
- Patent Class: 408.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['13643303', '10935398', '14128140', '14369175', '10914111']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7467600599048767
- 35 USC 102 Novelty (BERT): 0.4995468813624613
- Combined Prediction Score: 0.7220387420506352
- Mean Citation Score: 243.39680000000004
- Max Citation Score: 256.10825
- Similarity Product: 163.3718787828386

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

Dataset: test