Patent ID: 11859751
Assignee: IN-LINE FLOW PRODUCTS LTD.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  B | IPC B  F

Claim 4:
5. The closure device as set forth in claim 1, wherein the pressure alert assembly further comprises:
a stem housing operatively coupled to the hub, the stem housing further enclosing a radial hole disposed through the hub to provide communication with an interior of the pressure vessel or the pipeline;
a threaded bushing disposed in the radial hole, the threaded bushing configured to threadably receive an interrupted thread of a pressure alert stem, the threaded bushing further comprising a sealing surface to contact an o-ring seal disposed on the pressure alert stem; and
a third longitudinal through-hole disposed through the annular external housing, the third longitudinal through-hole substantially aligned with the longitudinal through-holes of the blocks and with the second longitudinal through-hole when the opposing ring sections are in the closed position.