US Patent 9930911 Water pipe bowl assembly

A water pipe bowl assembly includes a hollow adapter having a connector and an opposed insert, and a bowl support extends radially outward from hollow adapter between the connector and the insert. A hollow bowl fixture is positioned on the bowl support and over the insert, and includes inwardly-directed upper flange encircling the closed outer end of the insert, an inwardly-directed lower flange encircling the inner end of the insert, and a smoke-collection chamber between the upper and lower flanges through which the insert extends from the inner end to the closed outer end. The upper flange and the closed outer end of the insert form a bowl for receiving a substance to be smoked and a smoke-inhalation pathway from the bowl to the smoke-collection chamber, and the opening through insert is for transferring inhalation smoke from the smoke-collection chamber to the hollow adapter.