4 ms·
All they need is a section of threading that gets looser to release pressure while it is still retained in the top.
by kevin_thibedeau 6mo ago
All they need is a section of threading that gets looser to release pressure while it is still retained in the top.
- malfist 6mo agoThats all? What happens if the jar is turned upside down in this case? What if something is set on the lid? What if the jar is with someone heading to a camp site in a 4 wheeler and it is vibrated a lot?
- kevin_thibedeau 6mo agoYou have a section of threads that seal or have a gasket. This is simpler than a relief valve that can leak or collect bacteria.
- malfist 6mo agoThe cap is rigid. Either the threads constrain movement or they don't. A section of threads that allow for movement would still find the overall system constrained by other threading.
- kevin_thibedeau 6mo agoThe pitch stays the same. The simplest way is tapered threading with a sufficiently deep groove to retain when only the first few threads are engaged. Less simple is a custom male profile that transitions into a squared ACME like profile to let gas leak by.