I own 3 Intertap taps, bought from Keg-King before the KK/KL split. There are two versions of the springs for the Intertaps, the big one works the other is too short/weak to properly close the tap.
Even with the big spring it kinda scraped when opening and closing like you say. I ended up not using the auto-close springs at all.
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On the patent topic there is a thread either here or at homebrewtalk that covers the issue in some detail, there are also some additional details on Brulosophy. There were/are no patents in Australia covering perlic/VentMatic forward sealing taps, however the US importer of Intertap taps had to remove Intertaps from sale for a period of about 6 months because the VentMatic patent holder (Bradford Amidzich) claimed that the InterTap infringed on his patent. Intertap came to an agreement with VentMatic and is now registered under VentMatic patents US6457614, US6626420, US7077299.
It appears Ultratap is using the same patents in their design and has one of the patent numbers (7077299) stamped on the body.
My Intertap taps (no flow control) all have a non-laminated flow if I open the tap too fast, if I open it slowly it is perfectly laminated so it is not just an issue for flow control taps.
The non-laminated flow creates about twice as much head as I want. I don't have a photo of this but I may try to take one.