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 19):
A fluxless brazing method comprising:\n providing at least one clad sheet having at least three layers, wherein the at least three layers include a core composed of aluminum or an aluminum alloy, a first filler material disposed on a first exterior side of the at least one clad sheet and being composed of an Al\u2014Si alloy, and a second filler material disposed on a second exterior side of the at least one clad sheet, the second filler material being 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, the at least one clad sheet comprising at least one element that breaks down an oxide film when heated; providing a tube composed of aluminum or an aluminum alloy, wherein the aluminum alloy of the tube is the same as or different from the aluminum alloy of the core of the at least one clad sheet; shaping the at least one clad sheet into a hollow structure such that the first filler material is disposed on an exterior surface of the hollow structure; inserting the tube into a through hole defined in the hollow structure such that a first end portion of the tube is disposed in the interior of the hollow structure, thereby forming an assembled aluminum structure; and brazing the assembled aluminum structure by heating, and then cooling, it in an inert-gas atmosphere such that 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 fillets joining the hollow structure to the tube along the through hole are formed on both on the exterior surface of the hollow structure and on an interior 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): 0.8225906901368902
- 35 USC 102 Novelty (BERT): 0.5199171148879831
- Combined Prediction Score: 0.7923233326119996
- Mean Citation Score: 280.62807200000003
- Max Citation Score: 340.04926
- Similarity Product: 262.6697435839748

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