PATENT CLAIM ANALYSIS

Application Number: 16214505
Application Type: Utility
Filing Date: 2018-12
Publication Date: 2019-06
Patent Classification: ["313", "143000"]

Abstract:
A spark plug for internal combustion engines is provided which includes a porcelain insulator which is disposed inside a housing and extends outside a front end of the porcelain insulator. An annular ground electrode is secured to a front end portion of the housing. A pocket is created between a nose of the porcelain insulator and the housing. The housing has formed therein a plurality of vent holes which are located outside the ground electrode in a radial direction of the housing and communicate between the pocket and a combustion chamber of the engine. The vent holes include a first vent hole and a second vent hole which are different in opening area from each other, thereby enhancing scavenging of the pocket to ensure the stability of operation of the spark plug.

Claim (Index 1):
A spark plug for an internal combustion engine comprising:\n a hollow cylindrical housing which is attached to an internal combustion engine to have a tip thereof facing a combustion chamber; a cylindrical porcelain insulator which is retained inside the housing; a center electrode which is retained inside the porcelain insulator and protrudes from a front end of the porcelain insulator; and an annular ground electrode which is secured to a front end portion of the housing and has an inner peripheral surface facing an outer peripheral surface of the center electrode, wherein the housing has a shoulder which is formed on an inner peripheral surface of the housing and tapers toward a front end of the housing in an axial direction of the spark plug, wherein the porcelain insulator includes a mounting shoulder and an insulator nose, the mounting shoulder being formed on an outer periphery of the porcelain insulator and tapering toward a front end of the porcelain insulator in the axial direction of the spark plug, the mounting shoulder riding on the shoulder of the housing to retain the porcelain insulator inside the housing, the insulator nose being located closer to the front end of the porcelain insulator than the mounting shoulder is, wherein a pocket is created between an outer peripheral surface of the insulator nose and the inner peripheral surface of the housing, wherein a plurality of vent holes are formed in the front end portion of the housing and located outside the ground electrode in a radial direction of the housing, the vent holes communicating between the pocket and the combustion chamber, and wherein the vent holes include a first vent hole and a second vent hole, the first vent hole having an opening area which is different from an opening area of the second vent hole, as viewed in the axial direction of the spark plug.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 98.0
- Lexical Diversity: 2.02941
- Patent Class: 313.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15266072', '11976438', '11951578', '13546327', '15261017']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7371561680555083
- 35 USC 102 Novelty (BERT): 0.5284538818436804
- Combined Prediction Score: 0.7162859394343255
- Mean Citation Score: 298.1801200000001
- Max Citation Score: 390.63965
- Similarity Product: 362.4164441812396

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