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Metal Working

Pipe-closure-apparatus

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Pipe closure apparatus

Details

Inventors: Wesch, William E.;
Assignee:
Primary Examiner: Queisser; Richard C.
Assistant Examiner: Roskos; Joseph W.
Attorney, Agent or Firm: Gunn; Donald

This disclosure is directed to a temporary enclosure for a pipe. It includes a recessed opening in a body having an internal O-ring seal mechanism for engaging the end of a pipe. It is held to the pipe by incorporating a surrounding lip about the exterior of the pipe. The lip supports at spaced locations around the periphery three or four sets of pipe gripping devices. Each set incorporates a link which is pivoted to an arcuate body having serrated teeth on the innerface which contacts the pipe. As pressure is increased in the pipe, the device is forced off of the pipe. When this occurs, the connective link rotates, causing the peripheral gripper with teeth to bite into the pipe and thereby grip and hold the pipe.

DETAILED DESCRIPTION OF THE ILLUSTRATED EMBODIMENT The illustrated embodiment utilizes four jaws which are mounted on rotatable links.
Each jaw has the form of an arcuate portion with an internal face and teeth on that face.
It is curved to grip the exterior of the pipe in question.
Moreover, the link mechanism which mounts the gripper mechanism is offset or eccentric in operation.
The eccentric mechanism tends to increase the grip as more grip is required.
The link mechanism is anchored at a surrounding lip on the exterior of the pipe.
The closure apparatus of the present invention includes the surrounding lip which is affixed to a transverse closure member.
The transverse closure member is centrally drilled and is provided with a seat for the end of the pipe.
The seat is preferably countersunk so that the pipe extends into the seat by some distance.
Adjacent to the seat, a seal ring is positioned for encircling contact against the exterior of the pipe.
The gripper mechanism holds the seal in place so that increased internal pressure at the time of testing will not expell the test apparatus from the end of the pipe or fitting.
BRIEF DESCRIPTION OF THE DRAWINGS FIG.
1 is a sectional view through the end closure apparatus of the present invention installed on a pipe; FIG.
2 is a sectional view along the line 2--2 of FIG.
1 showing details of construction of the link mounted gripper means; FIG.
3 discloses an alternate form; and FIG.
4 discloses another alternate form.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Attention is first directed to FIG.
1 of the drawings where the numeral 10 identifies the pipe closure appratus of the present invention.
It is installed on a pipe to be tested which is identified by the numeral 12.
The pipe 12 may be a pipe or a fitting; it is not critical.
The pipe 12 is of some nominal OD and it will be appreciated that the test device of the present invention is constructed to that nominal OD.
It is not essential that the pipe 12 fit snugly or perfectly in the device

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