초록 ▼

A pressure retaining closure assembly has a door hingedly mounted to a pipe, vessel, or hub extending therefrom with an arcuate locking ring movably retained proximate an outer perimeter surface thereof. The locking ring is suitable to contract out of a groove in an opening in the pipe, vessel, or h

A pressure retaining closure assembly has a door hingedly mounted to a pipe, vessel, or hub extending therefrom with an arcuate locking ring movably retained proximate an outer perimeter surface thereof. The locking ring is suitable to contract out of a groove in an opening in the pipe, vessel, or hub extending therefrom into an unlocking position and is suitable to expand wherein an outer portion of the locking ring extends into the groove in the opening in the pipe, vessel, or hub extending therefrom into a locking orientation. A locking ring actuator is provided having cylinder with a piston therein. The piston has a rod extending axially therefrom with a portion extending beyond the cylinder. Optionally, a bracket is mounted to the portion of the piston rod extending beyond the cylinder and a bracket is mounted proximate the bottom of the cylinder. In this embodiment, a slider rod may be incorporated where the slider rod has a first end portion mounted to one of the brackets and a second end portion slidingly engaging the other bracket providing stability to the actuator assembly. A ring actuating arm may be pivotally connected to each bracket and secured proximate each end of the arcuate locking ring providing rotating engagement between the piston rod and a first point of the locking ring and rotating engagement between the cylinder and a second point of the locking ring.

대표청구항 ▼

I claim: 1. A closure for an opening in a pipe, vessel, or hub extending therefrom comprising:a round door having an inner and outer surface;an arcuate expandable locking ring movably retained proximate an outer circumference of said outer surface of said door;said arcuate locking ring being suitabl

I claim: 1. A closure for an opening in a pipe, vessel, or hub extending therefrom comprising:a round door having an inner and outer surface;an arcuate expandable locking ring movably retained proximate an outer circumference of said outer surface of said door;said arcuate locking ring being suitable to expand and contract wherein an outer circumferential portion of said locking ring is suitable to engage a groove within an inner circumferential surface of said opening when said locking ring is in an expanded orientation and is suitable to contract to a circumference less than the inner circumference of said opening; anda locking ring actuator having a cylinder with a piston slidably disposed therein, said piston having a piston rod extending axially therefrom with a portion extending beyond said cylinder, said cylinder rotatingly engaging a first point of said arcuate locking ring, said portion of said piston rod extending beyond said cylinder rotatingly engaging a second point of said arcuate locking ring wherein said locking ring actuator moves in relation to radial expansion and contraction of said locking ring.