SOVEREIGN KITCHEN · INVENTION #399 · ENGINEERING REFERENCE
SovereignCapsule™ — Engineering Spec
Hammered-copper egg cartridge · Pressurised self-reconstituting beverage system · Complete build reference
C110 Copper + C360 BrassEPDM / PTFE (21 CFR 177.2600)Max 8 bar (espresso)≈2 h garage prototype
1
How the System Works — Three Stages
💧 Hot Water Ingress
| Inlet temp | 90 – 96 °C |
| Filter cracking P | 0.4 – 0.6 bar |
| Espresso cracking P | 6 – 8 bar |
| Valve body | C360 brass |
| Poppet material | EPDM or PTFE (FDA) |
| Boss join | Silver-braze into 45° countersink |
💡 The cracking pressure of the inlet check valve sets the entire internal operating pressure of the capsule.
2
Shell Mechanics & Wall-Thickness Guide
🧮 INTERACTIVE WALL-THICKNESS CALCULATOR σ = P·r / 2t
8 bar
70 MPa
| Size | r (mm) | Dose | t required | Std gauge | Form method |
|---|---|---|---|---|---|
| Quail | 15 | 6 g | 0.086 mm | 0.25 mm | CNC spin-forming |
| Chicken | 20 | 10 g | 0.114 mm | 0.25 mm | CNC spin-forming |
| Duck | 30 | 18 g | 0.171 mm | 0.25 mm | CNC spin-forming |
| Goose | 45 | 28 g | 0.257 mm | 0.30 mm | Hydro-form |
| Ostrich | 60 | 40 g | 0.343 mm | 0.40 mm | Hydro-form |
Hammered texture increases dent resistance ≈15% via higher moment of inertia. Always round up to next standard sheet gauge.
3
Miniature One-Way Valve Specifications
| SPEC | INLET (TOP) | OUTLET (BOTTOM) |
|---|---|---|
| Body thread (≤Duck) | M5 × 0.5 | M5 × 0.5 |
| Body thread (Goose+) | ¼-28 UNEF | ¼-28 UNEF |
| Cracking pressure (filter) | 0.5 bar | 0.3 bar |
| Cracking pressure (espresso) | 6.0 bar | 5.8 bar |
| Flow coefficient Cv | ≥ 0.02 | ≥ 0.03 |
| Sterilisation | 121 °C, 30 min autoclave | 121 °C, 30 min autoclave |
| Suppliers | Beswick / Clippard / Swiss lathe | Same |
All valve bodies fit inside a 7 mm hex boss — matches the brass accent visible in the hammered-copper prototype photos.
4
Freeze-Dried Payload Integration
⚖️
Dose by Size
6 g (quail) → 40 g (ostrich). Target 1:15 brew ratio at full reconstitution.
🗜️
Compaction
Cold isostatic pressing at 200 MPa forms porous "puck". Cannot crumble during shipping.
🛡️
Oxygen Barrier
Flash-nitrogen purge + laser-weld mid-seam. Residual O₂ < 0.3 %. Shelf life ≥ 24 months.
🏗️
Bulk Density Target
0.35 – 0.45 g cm⁻³ so hot water can percolate through matrix without channelling.
5
Day-1 Prototyping Plan — 1 oz (Chicken) Unit
| # | Task | Time | Tooling |
|---|---|---|---|
| 1 | Parametric CAD | 1 h | Fusion 360 / FreeCAD |
| 2 | Spin-form two shells (0.5 mm scrap) | 30 min | Manual lathe + spoon tool |
| 3 | Silver-braze seam ring | 15 min | Torch + Cu-Ag rod |
| 4 | Tap M5 seat, install 0.5 bar check valves | 15 min | M5 bottoming tap |
| 5 | Load 6 g coffee puck, laser tack-seal | 10 min | 40 W fibre laser |
| 6 | Proof-test to 12 bar in water bath | 10 min | Bicycle shock pump + gauge |
| TOTAL | ≈ 2 h | All garage-scale equipment | |
Expected Output (8 bar, 1 oz shell)
Concentrate: 40 mLTDS: ≈12 %Shell reusable: Yes
6
Pour Performance Calculator
☕ POUR CALCULATOR
8 bar
0.8 mm
Pour Time
1.5s
Est. TDS
12.0%
Est. Volume
51 mL
7
Single-Use vs Refillable Variants
✅ PROS
▸Absolute food safety
▸Shelf-stable 24 months
▸Perfect dosing
⚠️ CONS
▸Metal waste unless recycled
▸One-time machining cost per shell
8
Regulatory & Safety Checklist
🏛️
Materials Compliance
C110 copper + C360 brass + FDA-grade EPDM/PTFE meet 21 CFR 177.2600.
⚡
Pressure Vessel
< 0.5 L and < 0.5 MPa may be exempt. Espresso version (8 bar) must comply with ASME VIII Div 1 UG-46.
🧼
Food Safety CIP
2% citric acid, 90 °C, 5 min → >5-log microbe reduction. Required between refill cycles.
🔬
Proof Test
1.5× working pressure in water bath before shipment. Bicycle shock pump + gauge is sufficient.
9
Scaling Recipe — Key Takeaways
1
Valve bore, boss width, filter plate Ø
All scale linearly with outer diameter.
2
Wall thickness
Keep t proportional to r·P/σ_allow. You'll hit practical sheet gauges before the math does.
3
Above goose size
Invest in hydro-forming dies — spin-forming work-hardens copper too much.
4
CAD parametrics
Height, diameter, t variables in Fusion 360 regenerate every size in minutes.
5
Hammered texture benefit
+15% dent resistance via higher moment of inertia. No extra material cost.
👑 SOVEREIGN IP — D.E.K. · Invention #399 · SovereignCapsule™ Engineering Reference
Category: Sovereign Kitchen · Materials: C110 Cu + C360 Brass · Conceived 2026
Category: Sovereign Kitchen · Materials: C110 Cu + C360 Brass · Conceived 2026