Here are a few cad projects, un-sellable, but good designs I think. Please feel free to use any designs with all engineering/design/development credit to me.
Please also download the CAD files and modify the drawings with your own ideas. I would love to post them.
- Assembly uses both locks for each retention side.
- Either side actuates the clips on both sides.
- Both clip pieces are the same part.
- Both axispins are the same part.
- All Three gears are the same part.
- Designed to be laser-cut and machined from 7075-AL or 6AL4V-TI.
- Center gear retainer still needs to be designed.
- Autodesk Inventor files.
- To be screwed together with 4-40 pan-heads.
- May be staked under pan and lock-tite-ed to prevent walking.
- May be heated to remove lock-tite.
- Retention edge needs to be radiused for end-mill-able clip hole.
Assembly - Autodesk Inventor
AxisPin.ipt - Autodesk Inventor
Base.ipt - Autodesk Inventor
Clip.ipt - Autodesk Inventor
gear.ipt - Autodesk Inventor
Machined Ti, Linen Micarta, etc. Cap has diamond knurled band at base, and is tapped at the top, to except a threaded and bend piece of spring material. Spring
can be produced from Stainless, Ti, etc. Thread is triple-start for speed of assembly.
- Two pieces of the same material (Ti, Aluminum, Stainless).
- Using Clip makes pen retention stronger.
- Pen Retainer prevents cap from unscrewing.
- Heat/Cold should not effect retention.
- Wire clip (over the standard bend sheet steel piece) provides more clip radius for the material.
- Wire clip allows clipping substrate to conform to pen cap.
- Cost effective, threaded, bent spring wire.
- Fast assembly and disassembly.
- Inspired by the Lamy Al-Star, but I believe this could be a better design. Less pieces, all pieces serve more than one purpose.
PenCap - Autodesk Inventor
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