PATENT CLAIM ANALYSIS

Application Number: 15747609
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-08
Patent Classification: ["228", "203000"]

Abstract:
A brazing method includes shaping a clad sheet to form a hollow structure. A tube is then partially inserted into a through hole in the hollow structure, thereby forming an assembled aluminum structure. The exterior surface of the hollow structure adjacent the through hole is composed of an Al—Si alloy that serves as a first filler material. The interior surface of the hollow structure adjacent the through hole is composed of an Al—Si alloy containing at least one of Cu and Zn and having a solidus temperature of 570° C. or less that serves as a second filler material. The assembled aluminum structure is brazed by heating it in an inert-gas atmosphere such that fillets joining the hollow structure to the tube along the through hole are formed first on the interior surface of the hollow structure and then on the exterior surface of the hollow structure.

Claim (Index 20):
A fluxless brazing method comprising:\n providing a hollow structure having a through hole in an exterior wall, wherein, at least around the through hole, an exterior surface of the exterior wall is a first filler material composed of an Al\u2014Si alloy, an interior surface of the exterior wall is a second filler material composed of an Al\u2014Si alloy containing at least one of Cu and Zn and having a solidus temperature of 570\u00b0 C. or less, and the exterior wall comprises an element capable of breaking down an aluminum oxide film when heated; partially inserting a tube into the through hole such that the tube straddles the interior and the exterior of the hollow structure, thereby forming an assembled aluminum structure, the tube being composed of aluminum or an aluminum alloy that is the same as or different from an aluminum alloy of a core of the exterior wall of the hollow structure; and brazing the assembled aluminum structure by heating, and then cooling, it in an inert-gas atmosphere such that (i) the second filler material of the at least one clad sheet begins to flow before the first filler material of the at least one clad sheet and (ii) a first fillet joining the hollow structure to the tube along the through hole is formed first on the interior surface of the hollow structure and a second fillet joining the hollow structure to the tube along the through hole is subsequently formed on the exterior surface of the hollow structure.

Metadata:
- Claim Count in Document: 8.0
- Percentile: 86.0
- Lexical Diversity: 2.125
- Patent Class: 228.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15533869', '15325530', '10807398', '13000481', '12600462']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8225343195662554
- 35 USC 102 Novelty (BERT): 0.5185860882058174
- Combined Prediction Score: 0.7921394964302118
- Mean Citation Score: 280.62807200000003
- Max Citation Score: 340.04926
- Similarity Product: 280.98220532167795

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

Dataset: test