PATENT CLAIM ANALYSIS

Application Number: 15867852
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-07
Patent Classification: ["060", "253000"]

Abstract:
A cylindrically-shaped hybrid rocket engine solid fuel grain defines an axial combustion port. A fuel grain material comprises a compounded blend of thermoplastic fuel and aluminum. The fuel grain comprises fused stack layers, each layer comprising a plurality of fused abutting concentric beaded structures arrayed to define the combustion port; the port exhibits a rifling pattern or rifling inducing geometry along the port wall. When an oxidizer is introduced into the combustion port combustion occurs along the exposed port wall. Each beaded structure defines a geometry that increases the combustion surface area while inducing a vortex flow of oxidizer and fuel gas. As each layer ablates, an abutting layer exhibiting a similar geometry, is revealed, undergoes a gas phase change, and ablates. This process repeats and persists until oxidizer flow is terminated or the fuel grain material is exhausted. The fuel grain may be manufactured by an additive manufacturing process.

Claim (Index 1):
A fuel grain for a hybrid rocket, the fuel grain comprising:\n a plurality of layers of fuel grain material, each layer comprising a plurality of concentric ring-shaped beaded structures of different radii fused together to form a disc defining a central opening therein; the plurality of layers stacked and bonded to form a cylindrical fuel grain with the central opening of each one of the plurality of layers aligned to form a combustion port extending axially through the fuel grain and bounded by a boundary wall; wherein the fuel grain material comprises a combustible substance; and an inner circumferential surface of each ring-shaped beaded structure comprising an irregular surface, such that as a ring-shaped bead forming the boundary wall ablates due to combustion in the combustion port, an inner circumferential wall of an adjacent ring-shaped bead comprising an irregular surface presents to form the boundary wall.

Metadata:
- Claim Count in Document: 68.0
- Percentile: 86.0
- Lexical Diversity: 1.88506
- Patent Class: 60.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15262661', '15818381', '15275423', '12052934', '13564463']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7454540006204909
- 35 USC 102 Novelty (BERT): 0.5753065709588917
- Combined Prediction Score: 0.728439257654331
- Mean Citation Score: 408.922596
- Max Citation Score: 495.2266
- Similarity Product: 429.6851464271069

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